Estes F15-8 Model Rocket Engines, 2 Pack –29mm F-Class Motors with Starters & Plugs Each weighs 1 pound and

Each weighs 1 pound and measures 12" Long x 1/2" Deep x 1" High

Smart volume and area calculations based on measured Length

gear ratios

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Designed to demonstrate the principle of an electrochemical cell

Estes F15-8 Model Rocket Engines, 2 Pack –29mm F-Class Motors with Starters & Plugs Each weighs 1 pound andPLEASE NOTE: These are large (29mm diameter) engines that will only fit certain model rockets. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. Estes F15 8 engine pack includes 2 engines, 2 starters, and 4 starter plugs The F15 8 is a powerful engine that will send your rocket sky high! Recommended for use with the Star Orbiter, Majestic, or other compatible rocket