{"title":"Mini (13mm) Engines","description":"\u003cp\u003eMini (13mm) Model Rocket Engines, Compact, Lightweight Motors for Small Rockets and Low-Altitude Flights\u003c\/p\u003e","products":[{"product_id":"a3-6t-engines","title":"A3-6T Engines","description":"\u003cp\u003eThe Estes A3-6T mini engine delivers smooth, reliable performance and a thrilling flight experience for small rockets. With a six second delay built into the motor, your rocket will coast at apogee longer before recovery begins, giving you more time to watch the flight and enjoy the peak altitude.\u003c\/p\u003e\n\u003cp\u003eBuilt to the exacting standards hobbyists expect from Estes, the A3-6T gives consistent thrust and dependable delays so your launches stay predictable and fun. Ideal for backyard flyers and club events, these mini motors pair nicely with popular kits like the Star Hopper, The Gnome, the Gryphon, and the Mini Honest John.\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003eIncludes:\u003c\/dt\u003e\n\u003cdd\u003e4 × A3-6T Engines\u003c\/dd\u003e\n\u003cdd\u003e4 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv data-core-is=\"block\" class=\"ecom-block ecom-core core__block elmspace ecom-3cytodr3g9l\"\u003e\n\u003cdiv data-stopdrag=\"true\" class=\"ecom__element element__heading ecom-element ecom-html\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-core-is=\"block\" class=\"ecom-block ecom-core core__block elmspace ecom-935yj497y5t short-description\"\u003e\n\u003cdiv class=\"ecom-element ecom-product-single ecom-product-single__description\"\u003e\n\u003cdiv class=\"ecom-product-single__description-wrapper\"\u003e\n\u003cdiv data-show-type=\"full\" class=\"ecom-product-single__description-container\"\u003e\n\u003cdiv class=\"ecom-product-single__description--paragraph\"\u003e\n\u003cdiv class=\"ecom-html-des\"\u003e\n\u003cp\u003eExperience better sight lines and a calmer recovery with the Estes A3-6T mini rocket engine. This 13mm motor is tuned to deliver a short, energetic boost followed by a six second delay, so your model reaches its highest point and then pauses before the recovery system activates. The result is a cleaner, more dramatic flight that is easy to track from the ground.\u003c\/p\u003e\n\u003cp\u003eWhat makes the A3-6T stand out is its consistency. Estes engines are manufactured and tested to provide repeatable thrust curves and predictable delay times, which means fewer surprises on launch day and more confidence when flying with friends or family. That steady performance helps new flyers learn timing and recovery and gives experienced hobbyists the reliability they need to plan flights precisely.\u003c\/p\u003e\n\u003cp\u003eOn the pad the A3-6T feels familiar and safe: a crisp ignition, a confident boost, and a gentle coast that showcases both altitude and stability. It is an excellent choice for lightweight rockets and small payload lofts where visibility and controlled recovery matter. Use it with many of our mini-friendly kits to get the most out of your neighborhood launches or club meetups.\u003c\/p\u003e\n\u003cp\u003eEach retail pack includes four A3-6T engines and the simple accessories you need to get flying. If you want predictable, fun flights that are easy to track and recover, the A3-6T is a dependable mini motor to add to your launch bag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC and Echo Six LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC and Echo Six LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eTotal Impulse: 2.50N-sec\u003cbr\u003eLength: 1.8 in. (4.57 cm)\u003cbr\u003eTime Delay 6 Seconds\u003cbr\u003eDiameter: 132 mm\u003cbr\u003eMax Lift Weight: 2.0 oz (57 g)\u003cbr\u003eWeight 0.27 oz (3.3 g)\u003cbr\u003eThrust Duratioion: 0.60 Seconds\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-ats7vkd99e\" data-core-is=\"block\"\u003e\n\u003cdiv class=\"ecom__element element__heading ecom-element ecom-html\" data-stopdrag=\"true\"\u003e\n\u003ch3 class=\"ecom__heading ecom-db\"\u003eCompatible Rockets:\u003c\/h3\u003e\n\u003cp\u003eStar Hopper\u003cbr\u003eMini Honest John\u003cbr\u003eGryphon\u003cbr\u003eGnome\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-c64xn0xfhp6\" data-core-is=\"row\"\u003e\n\u003cdiv class=\"ecom-row ecom-core core__block ecom-pybajeifcnk\" data-id=\"ecom-pybajeifcnk\" data-notice-content=\"This image is for preview only\"\u003e\n\u003cdiv data-deep=\"2\" class=\"core__row--columns\"\u003e\n\u003cdiv class=\"ecom-column ecom-core core__column--first core__column--last ecom-wgo6nm1o3d8\"\u003e\n\u003cdiv class=\"core__column--wrapper\"\u003e\n\u003cdiv class=\"ecom-column__overlay\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51204406804780,"sku":"EST1508","price":11.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/1000x1000_1508_A3-6T.webp?v=1749748380"},{"product_id":"estes-a10-0t-engines","title":"Estes Rockets - A10-0T Engines - 4 pack","description":"\u003cp\u003eENGINES FOR MODEL ROCKETS\u003c\/p\u003e\n\u003cp\u003e4 – A10-0T Engines\u003cbr\u003e4 – Starters\u003cbr\u003e4 – Starter Plugs\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-3cytodr3g9l\" data-core-is=\"block\"\u003e\n\u003cdiv class=\"ecom__element element__heading ecom-element ecom-html\" data-stopdrag=\"true\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-935yj497y5t short-description\" data-core-is=\"block\"\u003e\n\u003cdiv class=\"ecom-element ecom-product-single ecom-product-single__description\"\u003e\n\u003cdiv class=\"ecom-product-single__description-wrapper\"\u003e\n\u003cdiv class=\"ecom-product-single__description-container\" data-show-type=\"full\"\u003e\n\u003cdiv class=\"ecom-product-single__description--paragraph\"\u003e\n\u003cdiv class=\"ecom-html-des\"\u003e\n\u003cp\u003eThe Estes A10-0T engine is a booster stage engine designed for model rocket flight and has to be used with a mini engine. This engine is for flights in rockets weighing less than 4 ounces, including the engines. Each package includes 4 engines, 4 starters and 4 plugs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC \u0026amp; Echo Six LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC \u0026amp; Echo Six LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003cbr\u003e\u003cbr\u003e\u003c\/em\u003e\u003cstrong\u003eCompatible Rockets:\u003c\/strong\u003e\u003cem\u003e\u003cbr\u003e\u003c\/em\u003eSpace Corps Lunar Scout\u003cbr\u003eDestination Mars Leaper\u003cbr\u003e\u003ca href=\"https:\/\/www.echosixhobbies.com\/collections\/kits\/products\/checkmate\" title=\"Link to Estes Chaeckmate model rocket kit.\"\u003eCheckmate\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-e3ua5tbipi hide-on-mobile\" data-core-is=\"block\"\u003e\n\u003cdiv class=\"ecom__element element__heading ecom-element ecom-html\" data-stopdrag=\"true\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eTotal Impulse:\u003c\/strong\u003e 2.50 N-sec\u003cbr\u003e\u003cstrong\u003eTime Delay: \u003c\/strong\u003eNone\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMax Lift Weight:\u003c\/strong\u003e 4.0 oz (113 g)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMax Thrust: \u003c\/strong\u003e13.00 Newtons (2.9 lbs)\u003cbr\u003e\u003cstrong\u003eThrust Duration:\u003c\/strong\u003e 0.80 Seconds\u003cbr\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e 1.8 in. (4.6 cm)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDiameter: \u003c\/strong\u003e13 mm\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWeight: \u003c\/strong\u003e.24 oz. (6.8 g)\u003cbr\u003e\u003cstrong\u003ePropellant Weight: \u003c\/strong\u003e0.12 oz (3.5 g)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52363730845996,"sku":"EST10044","price":11.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10044.jpg?v=1773752506"},{"product_id":"1-4a3-3t-model-rocket-engines-4pk","title":"1\/4A3-3T Model Rocket Engines (4pk)","description":"\u003cp\u003eThe Estes 1\/4A3-3T is a mini single stage model rocket engine built for lightweight rockets and big smiles. Each retail pack includes 4 engines, 4 starters, and 4 reusable starter plugs so you are ready to fly right away.\u003c\/p\u003e\n\u003cp\u003eSmall but consistent, the 1\/4A3-3T delivers a gentle, dependable boost that is perfect for training flights, classroom fun, and backyard hobby launches. If you want predictable flights and easy recovery for tiny rockets, this little engine punches above its weight.\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003eIncludes:\u003c\/dt\u003e\n\u003cdd\u003e4 × 1\/4A3-3T Engines\u003c\/dd\u003e\n\u003cdd\u003e4 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446345265452,"sku":"EST10010","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10010_e2f048e3-8ea2-4c5e-845b-25e07ecd4e36.jpg?v=1777128864"},{"product_id":"1-2a3-2t-model-rocket-engines-4pk","title":"Estes Rockets - 1\/2A3-2T Model Rocket Engines (4pk)","description":"The Estes 1\/2A3-2T is a single-stage 13mm mini engine for lightweight model rockets. With 1.25 N-s impulse, 8.3 N peak thrust, and a 2-second delay, it delivers quick and reliable launches. Packs include 4 engines, 4 igniters, and 4 plugs.\u003cbr\u003e\u003cbr\u003eIdeal for small rockets like Mini Alpha, Mini Bertha, and Mini Honest John, it's perfect for educational, hobbyist, and backyard flying.","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446345298220,"sku":"EST10011","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10011.jpg?v=1766358005"},{"product_id":"a3-4t-model-rocket-engines-4pk","title":"A3-4T Model Rocket Engines (4pk)","description":"\u003cp\u003eThe Estes A3-4T is a mini single-stage model rocket engine designed for rockets up to 2.0 ounces. With a peak thrust of 6.80 newtons, a 0.60-second thrust duration, and a 4-second delay, it delivers dependable performance for lightweight rocket flights.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEach pack includes four engines, four starters, and four starter plugs, so you have everything needed for multiple launches without purchasing ignition components separately.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Estes A3-4T engine is a single-stage mini model rocket engine built for lightweight rockets and designed to deliver consistent, reliable performance. With a total impulse of 2.50 N-sec and a peak thrust of 6.80 newtons (1.5 lbs), this 13 mm diameter engine provides a solid boost for rockets weighing up to 2.0 ounces (57 g). Its 4-second delay allows for a steady coast before the ejection charge activates—helping ensure a controlled flight and dependable recovery system deployment.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWith a thrust duration of 0.60 seconds, the A3-4T delivers a quick, moderate-power lift-off that’s ideal for rockets requiring a longer delay before ejection. Whether you're launching a favorite kit or testing a new build, the A3-4T supplies reliable thrust and timing that supports a predictable flight path—perfect for hobbyists looking for dependable performance from a mini engine.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEach engine pack includes four A3-4T engines, four starters, and four starter plugs—everything you need for multiple launches. The included starters and plugs ensure reliable ignition with every flight, eliminating the need to purchase ignition components separately and making launch preparation simple and efficient.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKnown for its consistent performance and Estes’ trusted manufacturing quality, the A3-4T is a dependable choice for model rocketeers flying lightweight rockets. Its proven design, balanced thrust, and predictable delay make it a go-to engine for reliable single-stage flights.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC and Echo Six LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC and Echo Six LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003eIncludes:\u003c\/dt\u003e\n\u003cdd\u003e4 × A3-4T Engines\u003c\/dd\u003e\n\u003cdd\u003e4 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003cbr\u003e\u003cb\u003eNote: Ships via USPS Ground Advantage\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446345363756,"sku":"EST10013","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10013.jpg?v=1766358006"},{"product_id":"a3-6t-model-rocket-engines-4pk","title":"A3-6T Model Rocket Engines, (4pk)","description":"The Estes A3-6T mini engine is a specially produced, 13mm model rocket engine that has a 6-second delay. Enjoy watching your rocket soar at its highest heights for an extra 6 seconds before it starts the descent with this incredible mini engine.\u003cp\u003e\u003c\/p\u003e\u003chr\u003e\u003cdetails open=\"\"\u003e\u003csummary\u003e\u003cb\u003eIncludes:\u003c\/b\u003e\u003c\/summary\u003e\u003cul\u003e\n\u003cli\u003e4 engines\u003c\/li\u003e\n\u003cli\u003e4 starters\u003c\/li\u003e\n\u003cli\u003e4 mini starter plugs\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446345396524,"sku":"EST10014","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10014.jpg?v=1777127662"},{"product_id":"a10-3t-model-rocket-engines-4pk","title":"A10-3T Model Rocket Engines (4pk)","description":"\u003cp\u003eThe Estes A10-3T Engines are high-thrust, single-stage mini engines designed for lightweight rockets and quick, exhilarating flights. With a 3-second delay and strong lift power, they’re ideal for modelers looking for speed and dependable altitude gains.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCompact and powerful, the A10-3T offers fast launches with consistent performance, perfect for Estes mini rockets. Whether you're a beginner or a seasoned hobbyist, these engines deliver reliable excitement in a small format.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Estes A10-3T Engines are high-thrust mini engines built for exciting launches with lightweight model rockets. Designed as single-stage engines, they deliver quick and powerful liftoffs, making them a favorite for hobbyists who crave fast acceleration and short coast times. With a 3-second delay, these engines are great for rockets that are small, nimble, and engineered for quick altitude gains before deploying recovery systems.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKnown for their punchy performance in compact builds, the A10-3T offers a perfect blend of speed, simplicity, and fun. Its 13.00 Newton max thrust provides plenty of power for light rockets, while the 0.80-second thrust duration keeps flights brisk and exhilarating. Whether you’re running test flights, experimenting with new designs, or just enjoying weekend launches, these engines provide reliable, consistent results that keep the countdowns coming.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe A10-3T’s compact size and mini engine classification make it compatible with a wide range of Estes mini rockets and launch gear. If you're looking for dependable propulsion in a small package, this engine delivers a high-performance experience without the bulk. It's a great option for younger fliers, new hobbyists, or seasoned rocketeers who enjoy tight, fast flights.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEach package includes 4 A10-3T engines, 4 starters, and 4 starter plugs—everything needed to get airborne fast. Pair with recovery wadding and a mini launch pad to complete your setup and send your rocket skyward with confidence.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e4 × A10-3T Engines\u003c\/dd\u003e\n\u003cdd\u003e4 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003cbr\u003e\u003cb\u003eNote: Ships via USPS Ground Advantage\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446345429292,"sku":"EST10015","price":11.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10015.jpg?v=1766358007"},{"product_id":"1-2a3-4t-model-rocket-engines-4pk","title":"1\/2A3-4T Model Rocket Engines, (4pk)","description":"\u003cp\u003eThe Estes 1\/2A3-4T engine is a mini, single-stage engine built for lightweight model rockets up to 1.0 ounce. With a total impulse of 1.25 N-sec, a maximum thrust of 8.3 newtons, and a brief 0.3-second thrust duration, it’s designed for quick, reliable flights in smaller models.\u003c\/p\u003e\n\u003cp\u003eEach 1\/2A3-4T engine pack includes four engines, four starters, and four starter plugs, providing hobbyists with the essentials for multiple launches. Its compact size and dependable performance make it an ideal choice for hobbyists and educators seeking a reliable mini engine option.\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e4 × 1\/2A3-4T Engines\u003c\/dd\u003e\n\u003cdd\u003e4 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Estes 1\/2A3-4T engine is a dependable choice for launching lightweight model rockets. Designed as a mini engine with a 13 mm diameter, it delivers a total impulse of 1.25 N-sec and a peak thrust of 8.3 newtons. This quick-thrust, single-stage engine is ideal for smaller rockets that weigh up to 1.0 ounce at liftoff, giving them a powerful and reliable start to flight. With a time delay of 4 seconds before ejection, it allows for stable coasting and safe deployment of recovery systems.\u003c\/p\u003e\n\u003cp\u003eBuilt with precision for modelers who value consistency, the 1\/2A3-4T features a compact size of just 1.8 inches in length and weighs only 0.23 ounces. Despite its small stature, it packs a sharp burst of thrust lasting 0.3 seconds—perfect for short, fast flights in light rocket models. The engine’s performance is tuned to work with Estes’ mini engine-powered kits, providing dependable launches every time.\u003c\/p\u003e\n\u003cp\u003eEach engine pack includes everything needed for multiple launches: four 1\/2A3-4T engines, four starters, and four starter plugs. This convenient packaging is ideal for hobbyists who want to enjoy repeat flights without the need for additional components. The included starters and plugs simplify the ignition process, ensuring reliable performance from launch to ejection.\u003c\/p\u003e\n\u003cp\u003ePerfect for beginners and seasoned flyers alike, the Estes 1\/2A3-4T engine offers a balanced combination of thrust, delay, and compact power. Whether for hobby flying, educational projects, or flight testing, this engine provides a great entry point into mini-engine rocketry while delivering reliable Estes quality with every launch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC and Echo Six LLCrequires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC and Echo Six LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446346084652,"sku":"EST10035","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10035.jpg?v=1766358015"},{"product_id":"1-2a3-4t-model-rocket-engines-bulk-pack-24pk","title":"1\/2A3-4T Model Rocket Engines, Bulk Pack (24pk)","description":"\u003cp\u003eThe Estes 1\/2A3-4T Engine Bulk Pack delivers reliable power for mini rockets, making it a favorite for classrooms, youth groups, and clubs. Perfect for smaller models like the Star Hopper, these engines provide consistent performance and exciting flights that everyone can enjoy.\u003c\/p\u003e\n\u003cp\u003eConvenient and cost-effective, bulk packs include everything you need to launch 24 rockets. With Estes, you’ll have the quality and dependability trusted by rocketeers for decades.\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003e1 × \/2A3-4T Engines\u003c\/dd\u003e\n\u003cdd\u003e30 × Starters\u003c\/dd\u003e\n\u003cdd\u003e24 × Starter Plugs\u003c\/dd\u003e\n\u003cdd\u003e75 × Squares of Recovery Wadding\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Estes 1\/2A3-4T Engine Bulk Pack is designed for rocketeers who love launching mini rockets with maximum fun. This 1\/2A impulse engine is small but mighty, delivering exciting flights that are perfect for beginners and groups who want to see their rockets soar while still staying within a visible flight path.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDespite being a mini engine, the 1\/2A3-4T packs plenty of power and offers reliable performance. It’s an excellent choice for younger rocketeers or group activities where keeping rockets in sight makes launches more engaging and manageable. Estes engines are precision manufactured for consistent results, giving you peace of mind with every countdown.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBulk packs are a smart way to prepare for group launches or multiple flights in one session. Each pack comes with all the essentials you’ll need for 24 launches, including engines, starters, plugs, and recovery wadding. With everything in one place, you’ll spend less time gathering supplies and more time enjoying launches.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhether you’re flying the Star Hopper bulk pack rockets or other compatible Estes mini-engine models, the 1\/2A3-4T Engine Bulk Pack ensures smooth, safe, and exciting flights. From classrooms to rocket clubs, this pack is the perfect companion for rocketry adventures big and small.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC and Echo Six LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC and Echo Six LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of these model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52446347755820,"sku":"EST1788","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est1788.jpg?v=1766358046"},{"product_id":"a3-6t-model-rocket-engines","title":"ESTES - A3-6T Model Rocket Engines","description":"\u003cp\u003eThe Estes A3-6T mini engine is a specially produced, 13mm model rocket engine that has a 6-second delay. Enjoy watching your rocket soar at its highest heights for an extra 6 seconds before it starts the descent with this incredible mini engine. Each package includes 4 engines, 4 starters, and 4 mini starter plugs.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-3cytodr3g9l\"\u003e\n\u003cdiv class=\"ecom__element element__heading ecom-element ecom-html ecom-type-deffault\"\u003e\n\u003cdiv\u003eOverview\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-935yj497y5t short-description\"\u003e\n\u003cdiv class=\"ecom-element ecom-product-single ecom-product-single__description\"\u003e\n\u003cdiv class=\"ecom-product-single__description-wrapper\"\u003e\n\u003cdiv class=\"ecom-product-single__description-container\" data-show-type=\"full\"\u003e\n\u003cdiv class=\"ecom-product-single__description--paragraph\"\u003e\n\u003cdiv class=\"ecom-html-des\"\u003e\n\u003cp\u003eThe Estes A3-6T is a specially produced, 13mm model rocket engine that has a 6-second delay. Enjoy watching your rocket soar at its highest heights for 6 seconds longer before it starts the descent with this incredible mini engine. Use this engine with more than 10 of our rockets including the Star Hopper, The Gnome, the Gryphon, the Mini Honest John, and more! Each package includes 4 engines, 4 starters, and 4 mini starter plugs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block ecom-ats7vkd99e\"\u003e\n\u003cdiv class=\"ecom__element element__heading ecom-element ecom-html ecom-type-deffault\"\u003e\n\u003ch3 class=\"ecom__heading ecom-db\"\u003eCompatible Rockets\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-c64xn0xfhp6\"\u003e\n\u003cdiv class=\"ecom-row ecom-core core__block ecom-pybajeifcnk\" data-id=\"ecom-pybajeifcnk\"\u003e\n\u003cdiv class=\"core__row--columns\"\u003e\n\u003cdiv class=\"ecom-column ecom-core core__column--first core__column--last ecom-wgo6nm1o3d8\"\u003e\n\u003cdiv class=\"core__column--wrapper\" id=\"ecom-wgo6nm1o3d8\"\u003e\n\u003cdiv class=\"ecom-column__overlay\"\u003e\n\u003cdiv class=\"ecom-overlay\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"core__blocks\"\u003e\n\u003cdiv class=\"core__blocks--body\"\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-jq45q9s2nf\"\u003e\n\u003cdiv class=\"ecom__element ecom-element element__code exporting\"\u003e\n\u003cdiv class=\"related-products-wrapper\"\u003e\n\u003cdiv class=\"related-product-list\"\u003e\n\u003cdiv class=\"related-product\"\u003e\n\u003ca href=\"https:\/\/b2b.estesrockets.com\/products\/star-hopper\" class=\"samitaLock-item\"\u003e\n\u003cdiv class=\"related-product-image\"\u003e\u003cimg src=\"https:\/\/b2b.estesrockets.com\/cdn\/shop\/products\/7303_StarHopper_BagRocket_medium.png?v=1692731719\"\u003e\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cdiv class=\"related-product-name\"\u003e\u003ca href=\"https:\/\/www.echosixhobbies.com\/collections\/kits\/products\/star-hopper%E2%84%A2\" target=\"_blank\" title=\"Link to Star hopper model rocket\" rel=\"noopener\"\u003eStar Hopper™\u003c\/a\u003e\u003c\/div\u003e\n\u003ca href=\"https:\/\/b2b.estesrockets.com\/products\/star-hopper\" class=\"samitaLock-item\"\u003e\u003cform method=\"post\" action=\"https:\/\/b2b.estesrockets.com\/cart\/add\" class=\"pd-style-rkwpduyfqcl\" data-pd-style-i-d=\"pd-style-rkwpduyfqcl\"\u003e\u003c\/form\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"related-product\"\u003e\n\u003ca href=\"https:\/\/b2b.estesrockets.com\/products\/mini-honest-john\" class=\"samitaLock-item\"\u003e\n\u003cdiv class=\"related-product-image\"\u003e\u003cimg src=\"https:\/\/b2b.estesrockets.com\/cdn\/shop\/products\/2446047776024465PT05_medium.jpg?v=1692730398\"\u003e\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cdiv class=\"related-product-name\"\u003e\n\u003ca href=\"https:\/\/www.echosixhobbies.com\/collections\/kits\/products\/mini-honest-john\" target=\"_blank\" title=\"Link to Mini Honest John Model Rocket Kit\" rel=\"noopener\"\u003eMini Honest John\u003c\/a\u003e\u003ca href=\"https:\/\/b2b.estesrockets.com\/products\/mini-honest-john\" class=\"samitaLock-item\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ecom-block ecom-core core__block elmspace ecom-e3ua5tbipi hide-on-mobile\"\u003e\n\u003cdiv class=\"ecom__element element__heading ecom-element ecom-html ecom-type-deffault\"\u003e\n\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003cbr\u003eTotal Impulse: 2.50 N-sec\u003cbr\u003eTime Delay: 6 Seconds\u003cbr\u003eMax Lift Weight: 2.0 oz (57 g)\u003cbr\u003eMax Thrust 6.80 Newtons (1.5 lbs)\u003cbr\u003eThrust Duration: 0.60 Seconds\u003cbr\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eLength: \u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e1.8 in. (4.57 cm)\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eDiameter: \u003c\/span\u003e13 mm\u003cbr\u003eWeight: 0.27 oz (7.65 g)\u003cbr\u003ePropellant Weight: 0.12 oz (3.3 g)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52467896615212,"sku":"EST1508","price":11.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est1508.jpg?v=1766358037"},{"product_id":"a3-2t-model-rocket-engines-4pk-1","title":"A3-2T Model Rocket Engines, (4pk)","description":"\u003cp\u003eThe Estes A3-2T mini engine is a 13mm model rocket motor built for lightweight flyers that want a little extra airtime. With a reliable 2 second delay, the A3-2T gives your rocket a brief, breathless coast at apogee before recovery begins, making flights feel higher and more dramatic without pushing into high power territory.\u003c\/p\u003e\n\u003cp\u003eDesigned for hobbyists who love backyard launches and casual clubs, this engine offers consistent ignition, predictable performance, and the small but satisfying kick that makes mini rockets exciting. It is forgiving for new builders and precise enough for repeatable launches when you want tight consistency across several flights.\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003eIncludes:\u003c\/dt\u003e\n\u003cdd\u003e4 × A3-2T Engines\u003c\/dd\u003e\n\u003cdd\u003e4 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must have a physical address for delivery.\u003cbr\u003e\u003cb\u003eNote: Ships via USPS Ground Advantage\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe Estes A3-2T mini engine delivers a neat balance of gentle power and a short, dependable delay. This 13mm motor produces a crisp boost that carries very light rockets to their peak quickly, then times a 2 second coast for a clean transition to recovery. It is ideal for models that weigh up to the mini engine limits and for flyers who want satisfying altitude without complex setup.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhat makes the A3-2T stand out is its consistency and user friendly performance. Expect reliable starts, predictable thrust duration, and repeatable delays so you can focus on building, flying, and enjoying recovery. These engines are made to the same quality standards Estes flyers count on, so you get dependable results whether you are teaching a newcomer or polishing a weekend launch routine.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe A3-2T works with a wide range of our mini kits including Star Hopper, The Gnome, The Firestreak, Gryphon, Mini Honest John and many others. Its modest impulse and 2 second delay are best for rockets and small payloads that benefit from a short coast before descent. Consult your rocket kit flight data to match the engine to the model for the safest, highest performing flights.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEach pack contains four A3-2T engines along with starters and mini starter plugs so you have what you need for multiple flights. Always follow the included safety instructions and local launch site rules. Ready to add consistent, fun flights to your next launch day? Pick up a pack and get airborne.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eEstes Industries, LLC and Echo Six LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC Echo Six LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":53002691707180,"sku":"EST10012","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/files\/est10012_a85daa20-1f98-40f7-a036-dff06a2e3973.jpg?v=1776700547"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/7863\/0444\/collections\/est10015.jpg?v=1777125261","url":"https:\/\/www.echosixhobbies.com\/collections\/mini-13mm-engines.oembed","provider":"Echo Six Hobbies","version":"1.0","type":"link"}