Ok here it goes guys.Im working on a jet pack that will have the design of a standard Merr Sonn JT 12 jet pack but will be functional...so far ive determined a suitable fuel and a system for delivering fuel,my current design utilizes a valveless pulse jet engine design but i need more in put from people who have had some expirience with something like this,ive crunched the numbers and came out that a jet pack with my current design would give 10 15m high jumps with safe landing.Ive worke out a way to cotrol it wvia a programed chip and the first tests in computer simulations seem to prove the concept but the fact is the engine is a bit loud for my liking so imhoping for some helpfull suggestions.Thanks in advance for any suggestions and idea's you guys might give me.^^