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Message: [QUOTE="Dirtbike'n man, post: 857416, member: 51604"] well im building a jump and need to figure out how high and long to build the jump. the jump is at the top of a hill and then there is another smaller hill that i plan on landing on. Where i plan on putting the jump it is about 100 feet between the to hills and i was wondering in anyone knows the forumula for finding out how high and long to build the jump and at what speed i have to be going to clear it. i want to jump at more of a flat trajectory and not and such a high arc so i can land with out a landing ramp. im thinking the hill might just be enough to get the job done but i am not sure. any help will be appreciated. [/QUOTE]