First off you're wrong. Have you ever built a jump or hit one that big??
Mike Wilson hit a 165 foot jump back in the day (look it up on youtube) and he didn't make the landing. It started at 185 feet and he made them shorten it because he knew it wasn't possible with what they were working with. He hit it close to 100 mph. To build a jump that big you need several things. First you need an out. The snowmachine that will be required to tow you in to match speed will need an outrun, the skier/snowboarder will need a way out if the speed isn't right (an error Wilson made when he came up short and knew he was going to) and a narrow jump in order to not hit it if everything isn't right.
I don't know where you got your calculations from, but they are inaccurate. I've spent a lot of time going over this with Wilson and how to do it properly, and it's all physics. High speeds are required, and without skydiving or air tunnel awareness it would not end up well. No 160 foot jump would require 50mph ha, if it was that easy people would be hitting those jumps all the time.
PM me if you would like more information on building jumps that large, but I hope nobody heeds your advice because hitting a 160 foot jump at 50mph would definitely end your season.
john18061806if you were taking off at 100mph at 45 degrees you would go 669 feet- that's for a tabletop. Almost no jumps have takeoffs that steep and if one did based on how long the transition is you would need to exceed terminal velocity on the inrun which really isn't possible. A well made 160ft jump would have a takeoff speed of about 50. The 120ft chairlift gap jump in less had a low takeoff angle and huge lip which is why they had to go 60mph into it.
your point about wind/air resistance messing with your body is completely valid and it definitely makes sense at hit speeds but 100mph is ridiculously fast.
here's a 187 foot jump with a terrible song just to prove that stupidly huge jumps are possible, dude must've been going 70.