Hello ,.My name is Chase,...I just joined Oshkosh365 today ,..
and this post interested me because I am in the process of building my own design aircraft ,..I have 25 hours into the build ,..the fuselage is almost ready for primer ,..my material of choice for my wing spars arrived yesterday,..which is 6061 T-6 2.5" OD .065 wall tubing,..I plan on installing an inner vertical beam capped with HDPE, with supports that connect to my compression struts and cross bracing tubes thru the spar,. doing this gives me actually 2 spars in one per application,.each spar at 14' will weigh approximately 9 lbs,.and I'm using birch ribs,..to dampen wing twist in flight,..3 compression struts will be placed ,.1 between main fuel tank and main lift strut location and 2 in the outer section of the wing past the lift strut location,..these compression struts are omni mounted,..meaning they completely surround the spar at point of contact,..one could even call it an inner rib ,..with exception it does not have an airfoil top or bottom,..the idea is to keep the tortional loads in a more controllable enviroment ,.. a rectangle,.. such as a spanner truss design,..it can be built light and very strong,.. the reason for this is my wing will fold back to allow transport on a trailer,..same concept as a kitfox/avid with exception to the flaperon ,..I'm using a flap aeleron config. a 4 foot chord and 32 foot wing span ,..the airfoil is also my own design,...having a folding wing ,..the fueslage strut location is aft of the main spar ,.although proven in many designs to be sufficient,..it does allow excessive wing twist which is not good for wing tanks ,..it will eventually cause fractures in conventionally made tanks ,..and some composites in earlier recipe's.
thus the reasoning for the "inner Rib compression strut"
This wing is going on a STOL aircraft TG ,.when completed should weigh in just short of 700 lbs and have a 1400 lb payload
since it is a prototype in every aspect ,..I will have to do the load testing myself ,..my goal is for a static 9G positive and 6G neg
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