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Old 01-25-2005 | 08:29 AM
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JWORTNER
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From: Tampa, FL
Default RE: ThunderTiger Rare Bear

New development on the RB. Anyone have any concerns about the way the wings mount? I got looking at it the other day and I realized the the wing rod retaining screw does not go all the way threw the rod. I noticed this when I had the rod out and tried to thread the screw into the rod for safe keeping, it only screwed in a little bit before hitting significant resistance. In other words, the hole was not big enough for the screw to pass through. I check the other side and had the same results. My first reaction was to head out and find a longer screw, but did'nt get a chance to do it because we were heading to the field that morning.

That same day the RB had flights 5 and 6. We ran it pretty hard. The tail held up real good. I tried some medium some snaps and spins and was VERY surprised how quick the RB locks up straight when recovering from maneuvers without requiring any control input. I mean you get into a good spin and just neutralize controls and she locked straight up. Pretty impressive, I would have expect it to be more snappy.

Well, back to them of this story. At the end of the flight, I noticed a significant gap between the wing and the fuselage, probably about 1/16!QUOT! and you could sort of wiggle the wing a little bit. I took the wing retaining screws out and went to remove the wings and they were STUCK! Both of them would not slide off the tube. GO figure......

They would come off about 1/4!QUOT! or so and then hit resistance. I could push them back together, but they would hit something when pulling them apart. Finally after some significant wiggling and pulling we (it took two of us) got them apart. Couldn't really see anything wrong. I suspect that a bur developed where the screw goes threw the rod which was hitting something keeping the tubes from sliding out. I expected to see the holes in the wing tube to be elongated, but they did not look that way??????? Something had to give for the play in to wings to appear.

Anyway, as I mentioned earlier Mike McConville (TOC) was at our field today. He designs most the the Hanger 9 planes now so knows a good deal about building. He said that he stopped using the screw through the wingrod some time ago because of the same problem I just explained.

Sooooo, the next new mod for my RB is to fab some wing bolts to hold the wing to the fuselage.