In the 1930's rides were built large, heavy and ponderous by todays modern standards. They often required fifteen men to move them and a permanent crew of up to six people to operate them. But America was young and help was cheap and abundant. Steel,iron and oak were the prefered building materials because they were durable, easy to work with and needed few specalized tools that couldn't be found in any local machine shop. America was all about going faster by the third decade of the 20th century and the epitome of the new fast thrill ride of the 1930s was the Moonrocket. Originally built by the Herschell-Spillman Company it offered a ride on a circular, banked track with 22 stainless steel cars that were curved to fit the radius of the track. The cars were arranged in a train that was long enough to go completely around the track and have the lead car almost touch the tail car. Each car held 3 adults or 5 children. 
With a big industrial gasoline engine powering it, the ride started, gaining speed quickly, forcing riders to the outside of the cars due to increasing G forces. The gasoline engine gave the ride virtually unlimited speed. To increase the illusion, a center dome rotated in the opposite direction,( with the life sized carved charachter of Popeye The Sailor riding a rocket) even when the ride was idle. Total weight of the ride and cars was 18 tons without an exterior building which was popular on the imported British models (It was patented in the UK by Charles Openshaw.).It was a big ride,even for it's time occupying a 50 feet front, with 54 feet of depth (including ticket office space), and a rear elevation to top of sign of about 27 feet.
In the late 1950's and early 60's there were still a few of these pieces around though many had been stripped of the buildings to cut down on set up and tear down time as well as wagon space. To my knowledge none of these rides exist intact today though there are supposed to be the remains of the 'Ling' familes old Moon Rocket in England. The ride however is incomplete, the original cars have been lost but fortunately the nose cones and tail pieces remain. However, most of the remainder of the ride has survived, with some outstanding artwork by the british artist Edwin Hall.