---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Fri 10/29/04: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:46 PM - Re: Flap trailing edge thickness (Clay R) ________________________________ Message 1 _____________________________________ Time: 12:46:26 PM PST US From: Clay R Subject: Re: RV9-List: Flap trailing edge thickness --> RV9-List message posted by: Clay R I forwarded this question to an airfoil designer.. Here's his reply to my question of a sharp vs. 1/8" square trailing edge. -Clay Theoretically, a sharper edge is better because of a better defined stagnation point, but in real life it won't make any difference at all. The boundary layer is pretty thick by the time it reaches that far anyway. John --- Gerry Filby wrote: > --> RV9-List message posted by: Gerry Filby > > > > Folks > > I used T-88 expoxy between the skins and AEX wedge > of the > trailing edges of the elevators, rudder and > ailersons with good > results - very straight and even. > > Today I completed the right flap and realized that I > had a > thicker layer of epoxy between each skin and the AEX > wedge. > Consequently the very edge of the trailing edge is a > little > thicker than my previous efforts - I would say its > 2.5 mm at > worst and generally 2mm along the span. My other > effots were > about 1.5 mm. > > I've trawled the lists and the Net but haven't found > anything > definitive - is it a bad think to have that thick a > trailing > edge ? I see some notes that you want a "knife > edge" if you > can get it. > > g > > ========================================================== > > Gerry Filby > gerf@gerf.com > __________________________________