[W.]

I did model rockets when I was a kid, and the engines came 3 to a blue tube and cost 3/75¢. [They arrived via the US Mail!] Now the damn things are 3/$10+! Vern Estes would not approve...

[corkoman]

I'm thinking these were not Estes model rocket motors. As a kid we glued those to everything with wheels. Unless it was super light the motors would not make a big impact.

And for our bikes - trying to get two "D" big engines to ignite at the same time was really hard to do.

But when we finally got the ignition thing down we were able to ride past the girls and light them up - it wouldnt make us go much faster but for 5 seconds it made a great sound and a bunch of smoke!