{"product_id":"estes-f15-4-engines-29-mm-est10031","title":"Estes F15-4 Engines (29 mm) EST10031","description":"\u003cp\u003eExplore the Estes F15-4 Engines (29 mm) at MegaHobby. This model rocket engine pack is selected by its complete engine designation, not simply by the letter class.\u003c\/p\u003e\u003ch2\u003eProduct features and specifications\u003c\/h2\u003e\u003cp\u003eThe Estes F15-4 engine delivers high-thrust power and long burn times, making it a reliable choice for mid-power rockets. With a 4-second delay, it’s optimized for heavier, single-stage rockets needing a smooth boost-to-deploy transition.\u003c\/p\u003e\n\u003cp\u003eBuilt for performance, the F15-4’s extended 3.45-second thrust duration provides impressive altitude gains, while the 29 mm casing ensures compatibility with a wide range of larger rockets. It’s an ideal choice for modelers ready to step up from D and E engines.\u003c\/p\u003e\n\u003cdl\u003e\n\u003cdt\u003eIncludes:\u003c\/dt\u003e\n\u003cdd\u003e2 × F15-4 Engines\u003c\/dd\u003e\n\u003cdd\u003e2 × Starters\u003c\/dd\u003e\n\u003cdd\u003e4 × Starter Plugs\u003c\/dd\u003e\n\u003c\/dl\u003e\u003ch2\u003eSelect the exact recommended engine\u003c\/h2\u003e\u003cp\u003eMatch the full engine code, physical size and application to the rocket manufacturer’s instructions. Different delays and booster designations are not interchangeable choices. Check the listed pack contents before ordering and confirm which launch supplies are already included.\u003c\/p\u003e\u003ch2\u003eExplore Estes at MegaHobby\u003c\/h2\u003e\u003cp\u003eBrowse \u003ca href=\"\/collections\/estes\"\u003eEstes rockets and supplies\u003c\/a\u003e and \u003ca href=\"\/collections\/estes-rocket-engines\"\u003eEstes Model Rocket Engines\u003c\/a\u003e. Explore the wider \u003ca href=\"\/collections\/model-rocketry\"\u003eModel Rocketry collection\u003c\/a\u003e, then find \u003ca href=\"\/collections\/tools-supplies\"\u003ebuilding tools\u003c\/a\u003e and finishing materials in the \u003ca href=\"\/collections\/paint-store\"\u003ePaint Store\u003c\/a\u003e.\u003c\/p\u003e","brand":"Estes","offers":[{"title":"Default Title","offer_id":67890663030858,"sku":"EST10031","price":28.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/3066\/5546\/files\/F15-4-Engines-Package_7276b6bb-a838-49bd-92cb-22c9f9c5961a.webp?v=1793683261","url":"https:\/\/megahobby.com\/products\/estes-f15-4-engines-29-mm-est10031","provider":"Mega Hobby","version":"1.0","type":"link"}