Bill,
This point in the rules group was a contentious issue. A square post or round post shouldn't affect airflow any differently. Those who have flown far longer than I called the matter "pure nit-picking".
One thing I have done to "square-up" posts - they will never be square - is to roll tissue tubes over an .064 square brass rod (K&E), which can be generally found at hobby shops. I've been mastering the use of thinned white glue for tubes; this reduces the shrinkage that Duco-type glues cause in tissue. White glue is a lot messier. Square posts also help in alignment, because a twisted post will affect wash considerably.
Another thing to look at is cut posts over length, do your trimming, generally driving the post into the tube as you trim for flight. All my tubes are usually over designed and cut. These will plane the corners of posts for a snug fit. If they don't, and the tube is distorting, the post wood is too dense.
Bruce
-------------- Original message --------------
From: "Bill Gowen" <wdgowen_at_earthlink.net>
I'm not looking for a rules debate - just a clarification from those
of you who fly A-6:
Is it allowable for wing and stab posts to have enough length of the
rounded portion to make flight adjustments or must you do adjustments
in some other way? If you can have enough round post for adjustments,
how long is a reasonable length for the rounded part?
This may seem like a silly question but I have short posts and really
need a good part of them for adjustability.
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Received on Sat Mar 18 2006 - 00:51:52 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET