Now you can fly it on Estes E engines! Now it comes with laser cut fins, an adapter to fly on either D or E engines, and a new connector that allows you to quickly break down the rocket for easy transportation to and from the flying field. The Mean Machine includes great looking & easy to apply water transfer decals and a pre-assembled 24 in. parachute. New yellow decals too. Skill Level 2 Specifications: Length: 79.0 in. Diameter: 1.64 in. Weight: 5.8 oz. Recovery System: 24 in. Parachute Max. Altitude: 941 ft. Recommended Engine: D12-3, D12-5, E9-4, E9-6