Where a C-class motor from Estes puts out the equivalent of 2 pounds of thrust for one second, an H-class motor--the entry point to high-power rocketry--puts out 55 pounds.

FORBES: Serious Toys

Also more pleasing than any motor in this class is BMW's in-line six.

FORBES: Test Drives

A-class was unveiled at the Frankfurt Motor Show in September.

ECONOMIST: Car safety