i want to make a drop in. i was wondering how high i would need to make it. i am only hitting 8 ft long rails but they are 2 feet tall how high should it be so i can have enough speed to go up a jump and slide the whole thing.
You will undoubtedly be getting better and soon you'll be sliding longer rails and want more speed. You can lose speed in many ways - it's much harder to get it without the ramp. Make the ramp big and just place the rails far away and let friction slow you down.
i know somone who made a bytp with that new elastic cord thing. he just layed down the turf tied the other end to a tree and put a rail in the middle. it works great and you dont need to build anything