{"product_id":"b4-4-engines","title":"B4-4 Engines","description":"\u003cp\u003eThe Estes B4-4 Rocket Engines are ideal for mid-powered model rockets that demand a steady climb and reliable deployment. These single-stage, 18 mm engines offer a balanced performance with moderate thrust, making them a great choice for both new hobbyists and seasoned flyers looking for consistent flight results. The B4-4 is specifically designed for rockets weighing less than 3.5 ounces, including the engine, and provides dependable altitude and ejection timing for small to mid-size models.\u003c\/p\u003e\n \u003cp\u003eThese engines feature a thrust duration that supports a smooth boost phase, followed by a 4-second delay that allows rockets to reach peak altitude before recovery system deployment. This delay makes the B4-4 especially suitable for rockets with moderate drag and stable flight characteristics. Whether you're launching in a park, field, or on a certified range, you can count on a satisfying launch profile with every flight.\u003c\/p\u003e\n \u003cp\u003eEach package includes three B4-4 engines along with four starters and four plugs, giving you everything needed for multiple launches. The extra starter adds an extra level of convenience and value—ideal for those who like to be prepared on launch day. Estes' attention to safety and performance ensures that each engine delivers the reliability that model rocket enthusiasts have trusted for decades.\u003c\/p\u003e\n \u003cp\u003eWhether you're conducting a classroom demo, building your personal fleet, or hosting a weekend launch session, the B4-4 engine is a proven performer. Its moderate power and predictable deployment make it a smart option for a wide range of Estes kits and compatible low- to mid-weight rockets. Get ready for consistent results and fun flights with this time-tested engine.\u003c\/p\u003e\n \u003cp\u003eEstes B4-4 Model Rocket Engines are compatible with a large number of Estes rocket kits, including but not limited to: \u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003e1225 Alpha\u003c\/li\u003e\n \u003cli\u003e1292 Wizard\u003c\/li\u003e\n \u003cli\u003e1261 Baby Bertha\u003c\/li\u003e\n \u003cli\u003e1946 Boosted Bertha\u003c\/li\u003e\n \u003cli\u003e1948 Big Bertha\u003c\/li\u003e\n \u003cli\u003e1949 Viking\u003c\/li\u003e\n \u003cli\u003e2008 Generic 2X\u003c\/li\u003e\n \u003cli\u003e2021 Cadet\u003c\/li\u003e\n \u003cli\u003e2056 US Army Patriot\u003c\/li\u003e\n \u003cli\u003e2092 Mongoose\u003c\/li\u003e\n \u003cli\u003e2169 Dragonite\u003c\/li\u003e\n \u003cli\u003e2178 Hi-Flier\u003c\/li\u003e\n \u003cli\u003e2452 Athena\u003c\/li\u003e\n \u003cli\u003e2483 Phantom Blue\u003c\/li\u003e\n \u003cli\u003e7000 Bull Pup 12D\u003c\/li\u003e\n \u003cli\u003e7220 Crossfire ISX\u003c\/li\u003e\n \u003cli\u003e7245 Comanche-3\u003c\/li\u003e\n \u003cli\u003e7259 Nike-X\u003c\/li\u003e\n \u003cli\u003e7281 Corvetter\u003c\/li\u003e\n \u003cli\u003e7284 Starship\u003c\/li\u003e\n \u003cli\u003e7291 Space Corps Centurion\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\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","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44976789258416,"sku":"EST10019","price":11.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0685\/4351\/2752\/files\/010019-B4-4-Bag.png?v=1780034577","url":"https:\/\/arizonahobbies.com\/products\/b4-4-engines","provider":"Arizona Hobbies LLC","version":"1.0","type":"link"}