Pilfered Pearl warps

[SIMON BLAKE]

Greetings all:
I am building a 1/2 -A Pilfered Pearl 310 and wondered if anyone out there could tell me what the warps in the five-panel wing should be. My inclination is to leave the centre panel flat, wash-in the right intermediate panel about one-eighth inch and wash out each tip about 3/32. I am guessing the balance point should be about 80 percent. (None of this info is shown on the NFFS plan.) Any suggestions would be greatly appreciated.

[DAN BERRY]

I’ve never built one. It sounds like you are on the right track.

[marauderbomber]

I’ve never built one either but I personally wouldn’t wash-in ANY panels. I would keep all panels flat except the wing tips. Wash them out like you suggested. Start there and see if you need to wash-in any panels after a couple short test flights. Only do one correction at a time.

[SIMON BLAKE]

Thanks for the tips. Since I posted this in October, I’ve completed the wings and I did build in the warps I mentioned in the first post. That’s been pretty standard for me for many years and those warps, along with a little left and down thrust, generally make the model pretty safe. This is a geodetic wing so it’s pretty much impossible to add or remove warps after it’s built and I’m not a big fan of gluing on bits of trailing edge stock. So, we’ll see how she goes!

[SIMON BLAKE]

Thanks for the tips. Since I posted this in October, I’ve completed the wings and I did build in the warps I mentioned in the first post. That’s been pretty standard for me for many years and those warps, along with a little left and down thrust, generally make the model pretty safe. This is a geodetic wing so it’s pretty much impossible to add or remove warps after it’s built and I’m not a big fan of gluing on bits of trailing edge stock. So, we’ll see how she goes!

[DAN BERRY]

You have chosen a wise path. I don’t think you’ll have any problems getting it to fly.

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