Wonder why no one has built a launched backyard coaster yet. Would not be to hard. Just need a pulley and weight system with quick release latches (don’t use rope). Build the track as a shuttle style ride and hope you build the return spike taller then your velocity
Hey 8 – 15’ tower with enough weight and I’m to lazy to do math right now but I would guess very possible to reach 25-35 mph with avg. adult weight.
(Backyard boomerang) Any takers?
As for braking. Automate. 2x4’s with rubber strips fixed to load springs (go to the junk yard and grab some auto springs to cut), hurray friction brakes :o) (Would inspect often, also water dummy, water filled blowup doll whatever you have test before riding)
Not that I would be anywhere NEAR that thing for its first test but still. It would be cheaper, and could be built out of wood or steel. Just make sure your math isn’t too fuzzy on the launch and stress of car and frame.
Then once complete you need this guy’s backyard monorail. This rock.
Only things missing on this guys project is better details to the cars & a spiel in Spanish.