Hi Ron, OK, I will give you my experience on this hoping that it will help. Once our plane was finished it had a role to the right at cruise speed that reduced to nothing at 80Kts. This was the different washouts on the wings. There was a 1.8 degree difference so the problem was a little bit more on ours. We made our wings from foam cores supplied. It took a year and a half to make the wings alone. We set about fixing it about a year into its' flying career. The decision was made to raise the trailing edge of the port flap by 3mm if we could. I absolutely agree that raising the retracted position is much more difficult that lowering it but one has to consider that the aircraft will go a bit quicker the more raised they are as drag will be reduced (glider experience and subsequently my own Europa) So I had to raise the retracted position of the port flap as much as possible. This turned out to be 2 mm max. A nightmare of a job it was too. Sanding the rough surface of the close out at the contact point, taking a fraction off the leading edge of the flap without upsetting the profile and eventually to getting the last little bit reducing the thickness of the lip at the trailing edge of the body of the wing at the top of the close out to let the flap close without scuffing or bending it. Took two of us two nights. However this only achieved 2mm raising of the training edge of the flap in the retracted position. We also had relieve the top end of the flap actuating arm hole so that in the up position both flaps were full home. No quite enough but it gave an extra 2 whole knots in the cruise but still a roll to the right but much improved. I then put two spacers in the starboard flap close out to bring it down. First we tried 1mm down and it helped the role problem but did not affect the cruise speed. Second we tried 2mm down and it helped more but lost a knot of the cruise speed. Third we tried 3 mm down and cured the role problem completely but lost 2.5kts from the cruise speed (0.5 kts slower than when we started). I opted for 1mm down. One could install a rudimentary roll trim using a thin elastic bungy. The reason for this is we started at 128 knots and now it cruises at a full 130kts. Wheyhey! The added bonus of the final decision was that no adjustment to the flap join to our lovely fuselage fairing was required on the starboard side and a small amount of relieving only on the port side. Fred's fairings are gorgeous, try and keep the speed gains they offer by only dropping a flap if you absolutely have to. We also considered changing the wing tip shape to compensate as nobody sees two wingtip profiles at the same time. Another option that was not open to us but maybe it's not too late for you is to make the adjustment by raising or lowering of the trailing edge of the part of Fred's fairing that is attached to the fuselage. If they are bolted on then they could be used as ground adjustable roll trim. I'd probably do that if mine weren't completely part of the fuselage. Oh dear I am rambling again. Hope this is of some use. Cheers Justin Justin Kennedy Managing Director SystemWise Ltd. 107 Saughtonhall Drive Edinburgh EH12 5TS O: 0131 313 0707 From: rparigor@suffolk.lib.ny.us [mailto:rparigor@suffolk.lib.ny.us] Sent: 29 November 2010 02:20 To: Justin Kennedy Subject: Wing fairings Hi Justin Hope all is doing well by you. I managed to get wing sockets, spar ramps, and tiebar bonded in placefront and reinforced the front fuse by the lift sockets. Next job is flap control. I have gear lever and main gear installed. I am going to wait for a while on the aileron control. I purchased a set of wing fairings from Fred Klein and plan to copy what Frans did and have only the aft triangle attached to the fuse with 3 screws so I can install long wings. I have a set but will not begin build till I am flying with short wings. Keep this to yourself where you saw it (not official yet) but SB17 and the fix MOD78 sounds like a lot of work. What a royal pain in the neck that the front liftpin socket needs to be removed and replaced with an articulating arrangement. I needed to file down mine to allow it to fit. Sorry getting off track. My question has to do with the wing root fairings. My XS wings have evil built into them. The lead edges at the root are not the same. One fits the europa template OK and the other is off a bit. Bud said that is normal. Then I have flaps and ailerons that were "accelerated". I guess that means that they were built quickly "WRONG". The ailerons have a tad bit less washout than the manual calls for, but Nev said don't worry too much. And my port flap at the root drops more than it should. I did weight and post cure that helped only a little. All in all not terrible but not within book specs. I have a reasonable Mk1Eyeball and took all of the above into consideration and netted out with the right wing with template on it at 2.5 degrees with the flap against the template and set the port wing at 2.4 degrees with the flap about 1/8" below the template. Measuring the flaps at the aileron intersection has the port flap just about even with the starboard, but that also takes into consideration that the root of my XS wing has the lead edge just slightly lower on the port side. OK so thats my dart throw. The problem is I don't know when I test fly if I will need to mess with lowering (or raising) my port flap. It is far easier to drop a flap than it is to raise one or so it seems according to Bud: http://www.europaowners.org/forums/gallery2.php?g2_itemId=80572 If I install Freds fairings, what would be needed to be done to the fairing if I needed to drop a flap? Same question to raising a flap? In my instance if it is far easier to drop a flap than raise it, and you think it is also far easier to drop a flap as far as fairing fit compared to raising a flap, do you think I should perhaps make fairing fit with ability to raise flap 1/16"? Do you have any other suggestions? Perhaps fly with some portion of fairings not installed? or? I managed to get all my fairing info onto two pages (there may be some duplications): http://www.europaowners.org/forums/gallery2.php?g2_itemId=78458 Thx. Ron P.