jany77
Member
- Joined
- Jul 13, 2008
- Messages
- 574
- Location
- central california
- Aircraft
- cessna 150,172,182,trikes,ul
- Total Flight Time
- over 2250
hi guys i know this was here before but still there is something more about the wooden blades,as i was reading a lot about different kind of rotor blades either composite,aluminum or wood ,i think the wood is the best choice ,thats just my personal opinion ,id like to make or at least try make wooden rotor blades ,since i did not find any manufacturers whos offering 20' dia blades,as i was reading about structural analysis of blades my idea is as folows,leading edge the first 2,5" out of laminated yellow birch or maple ,the rest will be either 2lb hot wired foam core or pvc foam ,with fwe layers of fiberglass,at root 5 ply total at 45 degrre ,as for balance id like to use 5/16 diameter brass rod and at tip extra 12" for beter autorotation as birch has 15100 psi they should hold up load of 12000lbs with pretty good safety factor ,does anyone here has any experience with blades such as this thank you