Tom-

Have you had any experience with the reloadable rocket engines utilizing black powder??

I think all of the reloads are using composite fuel because black power is too brittle for reloads (but there may be a BP reload that I'm not aware of).

The composite motors are all more aggressive than the black powder motors in the same size. They don't seem to be much cheaper than black powder though unfortunately... unless you do a lot of launches.

I've sort of ended up in the middle ground of rockety... large model rockets... D - G. Check out www.the-launch-pad.com

I was into High Powered Rocketry for awhile but WAAAAY to expensive. $25-$100 per launch. Ouch!

Rocketry! LOL :)

You could always roll your own Sugar Motor (basically black powder) reloads as long as you keep them sealed (sugar motors are hygroscopic).

-Real men love rockets-

OK, this shit lookz cool, and we owe it all to Alex. Where do I buy some of this stuff here in town?

There is one reloadable engine case that I have seen used w/ black powder, the company will not endorse this and claims the casing can explode. http://www.apogeerockets.com/Rouse-Tech_Motors.asp

EboNE- most hobby shops carry the rocket kits, some do not carry the engines. The real good stuff along with the engines can be found online.
The link Tom posted is awesome for the kits but do not sell the engines.

Uhhh - uh, nice try Tom!

Thrust Curves are specified functions of time. Therefore a thrust that maintains equal average force over it's specified life is preferable to one
that expends all of its " Newton / Sec's " in the first second.

Still quite admirable, I'da loved to see the expressions when that thing blew up at 120 psi!

You are right BigR, a single bottle with open neck for a nozzle is around 380N.

Walmart sells model rockets and motors, but only up to size 'C'.

Phil's Hobby shop in Pinellas Park sells a bunch of kits and motors...