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| C wing dihedral http://t18.net/thorpforum/viewtopic.php?f=19&t=6641 |
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| Author: | jsanders [ Thu Jun 02, 2011 3:55 pm ] |
| Post subject: | C wing dihedral |
If I am reading Sunderland drawing #101L correctly the dihedral angle should be 7 degrees. Correct me if wrong. However when I bolt the 215 and 315 fittings together, I measure 4.1 degrees. Need some comments and info. from C wing builders. Jon Sanders |
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| Author: | Bill Williams [ Thu Jun 02, 2011 4:38 pm ] |
| Post subject: | C wing dihedral |
Are the fittings bolted to the spars? How are you measuring the degrees? the spar fittings are tapered, you would have to measure it along the bolt line. I made a 7 degree angle and clamped it to the spars to maintain the 7 degrees, Dihedral gives the plane stability and keeps the wingtip from hitting the ground when you ground loop. I would think 4 degrees would be OK but not ideal, the plane would be a little unstable, probably would fly like a RV. |
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| Author: | jsanders [ Thu Jun 02, 2011 6:42 pm ] |
| Post subject: | C wing dihedral |
Bill thank you, was hoping you would jump in on this with your no nonsense approach. No the fittings are not bolted to the spars. I had locked in on the 215 profile and ignored the 315 taper. I leveled the top of 215 in a vise then placed the smart tool on top edge of the 315. Just did it again this time I used the hole line in the 315, it came out 6.9 degrees. I like the idea of the angle jig, will use it. Jon Sanders |
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