Crossfire ISX Model Rocket Kit

If good wind, do not fly on anything above an A8-3. Guaranteed loss on a C6-5 in 10 Mph wind if not a 5 acre field.

This model rocket reminds me of a dart. I have the components for a scratch build Crossfire ISX Model Rocket and would recommend these improvements, Epoxy, no wood glue, laminate paper covers on the fins with CA adhesive, for lightweight strength and angle bevel the leading edge instead of rounding. Do not glue the plastic nozzle, in the airframe and only use it for display, because it will melt over time. Since the airframe is so short, add an ejection baffle, for a more reliable deployment, chute not melting. Replace the rubber shock cord with 80lbs. nylon braided fishing line and 1 foot of bungie cord. These improvements will allow you to use composite 18mm rocket motors, with possible transonic to supersonic flights and exceeding 1,150 feet of altitude, depending on your launch conditions. I will be upscaling and up powering the Crossfire ISX to 24mm and 29mm rocket motors in 2 models.

Because the body tube is so flimsy the slots for the fins make it almost impossible the get the body tube to a line along the fins. If you buy this kit I would through away the body tube that comes in the kit and buy the good old brownest-color body tube. This will require you to cut the fins flush at the root where it touches the body tube.