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Old Feb 02, 2016, 08:39 PM
changosurf is offline
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Quote:
Originally Posted by rocketscience View Post
Some of the caiprinha guys did the winglet mod because that plane came with 2 sets of winglets. You were supposed to use velcro and be able to swap them out. But the velcro made them really flimsy and it didn't work well. The nylon and screws works well and really not much extra weight.


I basically followed this. Scroll almost to the bottom.

When inserting the nylon, insert perpendicular to the tip edge.

http://birdman1goescaipirinha.blogsp...-post.html?m=1
Quote:
Originally Posted by gionir View Post
I use screw on winglets mainly for transporting the wing during hikes:
http://www.rclab.info/2015/04/custom...ong-range.html

I just used common sense in placing the M3 nylon nuts in the wings, maybe 20 to 30 mm from the edges.
To be honest I cannot feel the shift of CG, but that maybe comes from the fact that I fly with a blunt section which changes everything anyway.

I am really happy with the outcome, and never had a problem with this configuration.
thanks guys, I ended up performing this mod with some short nylon studs and light metal M3 screws. Seems to have worked out great, and now I don't have to worry about screwing up on the winglet design since I can easily change them out

I just hope they hold up in rough landings and don't strip out the threaded nylon stand-off from the foam. I used goop to glue the stand-offs.
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Old Feb 02, 2016, 08:41 PM
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might be a dumb question, but can anyone help me get an idea of what the 'angle of attack' should be for 'level flight' on a popwing?

I'm trying to calibrate auto-level on my flight controller, and I need to figure out how many degrees of up-pitch I need in order to keep the wing flying level. I've got it mocked up, and it looks like it might be around 5-10 degrees, but I'm not sure...
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Old Feb 02, 2016, 09:12 PM
Grantham Kid is offline
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All you can do is.... What looks good probably is.
It is trial and error and will usually fly quite OK anyway. Fly it and adjust it later when you see how it reacts.

Possibly 10 degrees, but depends on your downthrust angle as well.
What type of FC have you got that needs calibrating?
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Old Feb 02, 2016, 09:45 PM
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Originally Posted by Grantham Kid View Post
All you can do is.... What looks good probably is.
It is trial and error and will usually fly quite OK anyway. Fly it and adjust it later when you see how it reacts.

Possibly 10 degrees, but depends on your downthrust angle as well.
What type of FC have you got that needs calibrating?
naze32 FC running baseflight.
ok, I'll try 10deg and see how it goes. It *seems* to look about right
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Old Feb 02, 2016, 11:03 PM
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Quote:
Originally Posted by changosurf View Post
naze32 FC running baseflight.
ok, I'll try 10deg and see how it goes. It *seems* to look about right
You know how to trim this in between flights? If it's too much I'd recalibrate but if it's just a little.. land, disarm, throttle forward, then right stick to trim the direction you need. If u have a beeper you will hear confirmation. It takes about 4 beeps to even notice a change in the air. If.no beeper the light on the naze will flash.
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Old Feb 03, 2016, 12:21 AM
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You know how to trim this in between flights? If it's too much I'd recalibrate but if it's just a little.. land, disarm, throttle forward, then right stick to trim the direction you need. If u have a beeper you will hear confirmation. It takes about 4 beeps to even notice a change in the air. If.no beeper the light on the naze will flash.
thanks, yeah, I know how to use the stick command to trim it Actually, I'd be using the ezgui app, but the concept is the same.

Basically, I'd like to try to get it close enough so that I don't have to mess with it too much at the field. I set it to approx 10 degrees via the baseflight configurator app. We'll see how it goes...
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Old Feb 03, 2016, 01:40 AM
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Yeah I took a guess with my skipper xl and in self level it wanted to do a nose dive. So I had to recalibrate with a battery under the nose and it was much better. Easier to just land and recalibrate honestly.
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Old Feb 08, 2016, 12:24 PM
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For my mini popwing....
What kinda glue can i use to repair a tear on the hinge for the aileron? Or tape maybe? And what about where the motor mount meets the foam? Hot glue?
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Old Feb 08, 2016, 04:01 PM
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Use Blenderm tape for your hinges and hot glue around your motor mount.
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Old Feb 08, 2016, 04:23 PM
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Quote:
Originally Posted by Grantham Kid View Post
Use Blenderm tape for your hinges and hot glue around your motor mount.
Thanks!
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