14-09-2013, 09:08 PM
Originally prop vibration on the Extra 300EP was a flimsy firewall extension which was suitable braced. When it started vibrating again, I thought it was loose bolts securing motor. Tightened them & still vibrated. Wasnt so much loose motor bolts, but cracked firewall. Glued cracks with CA & put another piece of ply over the top with epoxy top & bottom. Now firm everywhere.
Checked & double checked everything to find out why is rolling from up elevator. Lateral centre of gravity is spot on. When I installed the horizontal stab, I measured from the wing spar to the outer tips of stab to ensure correct position. I have now checked from wing tips to stab tips & there is 5mm difference. Is this sufficient to cause severe rolling from elevator use? If so, what can I do to rectify rolling as I dont think I can move epoxied horizontal stabiliser. Comments will be appreciated.
Checked & double checked everything to find out why is rolling from up elevator. Lateral centre of gravity is spot on. When I installed the horizontal stab, I measured from the wing spar to the outer tips of stab to ensure correct position. I have now checked from wing tips to stab tips & there is 5mm difference. Is this sufficient to cause severe rolling from elevator use? If so, what can I do to rectify rolling as I dont think I can move epoxied horizontal stabiliser. Comments will be appreciated.