The Madcow Rocketry Engine Retainer system works perfect in any of these situations. If you're rocket is already built, you can easily add this all-metal engine retention system. And if you remove the base plate and toss it in your range box, the rocket itself can stand up on its own flat bottom. How cool is that?

How do you install it? Installation is very simple. Take the base plate and lay it on the bottom of the rocket. Mark where holes need to be drilled in the aft centering ring. Then drill the holes and screw in the self-tapping threaded inserts (a simple allen wrench tool is all that is needed). If you want, you can put a drop of thin CyA glue around the edges of the threaded inserts to permanently in place (this is optional in plywood centering rings).

That's it! You'll be done in less than five minutes.

When you're ready to launch the rocket, slide in the motor, position the base plate over the top of it (the nozzle protrudes through the hole), and screw in the two thumb screws into the treaded inserts you put in previously.

Features Include:

If you're in a jam and you don't have a motor retention system already on your built rocket, then the Madcow Rocketry Engine Retainer system is just what you may need.

Q. Do they work with single use motors too?

A. Yes they do!

Aero Pack Engine Retainers

Want to hold in your rocket engines securely without using tape or other unsightly metods? Then they Aero Pack retention system may be what you're looking for. There is a retainer available for all the common high power tube sizes that we carry (LOC, Blue Tube, and Fiberglass), as well as for the mid and high-power rocket kits on this web site.

Rail Buttons

Rail Buttons are used in place of launch lugs on larger rockets. The reason is that big rockets need a stiffer launcher so they don't sway around in breezy conditions. A launch rail is much stiffer than a circular rod, and therefore are used on big rockets so they launch safely and higher into the sky.

Modern High Power Rocketry 2

The most extensive book ever written about "how to build LARGE high power rockets." Recommended for all modelers getting ready to take a jump to those bigger and more powerful rocket engines. It takes you step-by-step in the process of how to prepare for Level 1, Level 2, or Level 3 high power certification.

How To Restrain Rocket Engines

In this free YouTube video, we'll answer the most common questions that people ask us about restraining the motor in the rocket.

"RockSim is great and the periodic e-mails are a good resource too. Running simulations using the demo version has at least given me a preliminary confirmation that my twice damaged/repaired rocket will be stable given specified climatic conditions. However, I plan to run more simulations with different ambient wind speeds, etc. It's an excellent software tool for design/simulation. I read about RockSim in your article in the NAR guidebook I recently received. The article was very well done. Thanks for making RockSim available." -- Regards, TIMOTHY E. RANEY