I need to build a small rocket engine out of household products.

Any suggestions?

What kind of rocket engine do you want to build?

Just a little something that I can strap onto matchbox or rc cars for fun.

grind or crush matchheads to a powder, make a tube that's closed on one side and has a tight hole on the other side and fill it with the powder, make a fuse by spreading some of the matchhead powder over a piece of toilet paper and rolling a roll from that that fits in the hole in the tube and then put it in. light the fuse and have fun, though you might have to try a few times to get it right.

Thanks. I was just as we speak, well write, making one out of matchheads and tin foil but yours sounds better. I'll try it and say how it works.

Worked okay, but anyone else have some ideas?

umm....

I s'pose you could use gasoline and a cart***** of compressed air.....

but it'd be easier to buy one.. check out the specs on a model rocket engine and try to mimic them.

just buy an estes one from a hobby shop / walmart for the model rockets

strap some bottle rockts on those bad boys
its a rocket engine? am i right

Press black powder in a piece of pvc at about 1000 PSI. When you light it pray you dont get a CATO