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Aug 04, 2010, 10:36 PM
It's Just Foam!!!
EZglider's Avatar
Russ,
You do realize you HAVE to name this "The Arrow", right? Too obvious, I know. I also know I'm gonna build one, I truly like the way it flies, and I need an easy build this weekend. Looks like just what I need. Thanks for sharing it.
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Aug 09, 2010, 02:57 PM
Registered User
Thanks potshot. pm sent.

Ray..
The motor mount to the front of the wing is 5" and 26 1/4" to the leading edge of the hor stab. The cg is around 3 1/4 to 3 1/2" from the leading edge.
Aug 09, 2010, 09:52 PM
Registered User
I wonder how this would size down to about half at about 8oz. If you could keep it that slow, it would be cool for smaller places too. Very nice...
Aug 09, 2010, 10:37 PM
It's Just Foam!!!
EZglider's Avatar
I down-sized mine a bit, since I only had a 29" arrow. 30" main wing, 8 1/2 " chord, with a basic 1 step KFM at 50% of chord. 5 " dihedral tips at 2 1/2 inch rise. Should have been ready to fly, but a family emergency got in the way. Can't wait to get it out and maiden it!
Aug 11, 2010, 04:42 PM
Registered User
It was a bit difficult to build, but using images as reference and the measures you put in the posts, I managed to finish it .

Now I need to try to put this beautiful aircraft in the air.

One note, this plane is huge .

To build this plane I used Foam Core (in Portugal we call it K-line with 10 mm width).

Thanks.
Aug 11, 2010, 07:15 PM
ɹǝsn pǝɹǝʇsıƃǝɹ - inverted!
DaDesign's Avatar
Looks good rcaridade and welcome to rcgroups.
Aug 11, 2010, 07:35 PM
Registered User
Nice job rcairdade. Looking foward to the flight report.

Potshot is working on some plans for me. He is doing a great job. He has some touch ups to do and thay should be posted in a couple days.
Aug 11, 2010, 08:59 PM
John 3:16
Daddy-O's Avatar
oooo....more plans.
Aug 12, 2010, 03:46 PM
Registered User
Here are the plans. I want to thank potshot for making the plans. He did a very nice job. He also did a dxf plan but I don't know how to post it. If anyone wants it I can email it to you. Just let me know.
Aug 12, 2010, 09:25 PM
Vertical approach specialist
potshot's Avatar
Here's the DXF. Just had to Zip it.

Thanks for sharing the design, Russ. Hope there's a fleet of them under construction right now.
Last edited by potshot; Aug 12, 2010 at 09:27 PM. Reason: Added thanks
Aug 15, 2010, 09:49 AM
It's Just Foam!!!
EZglider's Avatar
Finally got my Trainer in the air last night, and wow! It flew beautifully. Very nice, smooth flight, did anything I wanted. This is my first experience with the KFM airfoil, and I'm impressed with it's slow-flight capability. Unfortunately, dumb-thumb set in on my last flight, and I managed to nose it in from about 10 feet.(Don't loop so low on a low battery!) Nothing hurt but my improvised motor mount, which I had reservations about anyway. Russ, how did you set up the mount for yours? I'm gonna try to rerig it today and get back out before we get rain later. Thanks again for sharing this plane, I Love It!
Aug 15, 2010, 08:48 PM
Registered User
EZ... Glad you like it. My motor mount is 1/4" ply with a hole drilled in it for the arrow shaft and just epoxied on the end. When you get it back up get some video. I would love to see it.

Russ
Aug 18, 2010, 07:52 AM
Registered User

Bending the Leading Edge


Gentlemen & Ladies,

I've looked, without success, for info on forming the wing leading edge without cracking the external surface. I've ruined 2 wings so far and don't want there to be a third.

Can someone point me to an explanation of the forming process?

Thanks

Charlie
Aug 18, 2010, 09:36 AM
Went to mow a meadow
frank48's Avatar
Quote:
Originally Posted by cpc625
Gentlemen & Ladies,

I've looked, without success, for info on forming the wing leading edge without cracking the external surface. I've ruined 2 wings so far and don't want there to be a third.

Can someone point me to an explanation of the forming process?

Thanks

Charlie
Make the wing in 2 pieces, bevel the inside edges, join the outside with tape and fold over. Thats how I do 'em

Hope it makes sense to you

Cheers
Frank
Aug 18, 2010, 10:09 AM
^Its what I do^ - FPVholic
The Flying Farmer's Avatar
If you are using fff, just use the edge of the sheet that has the natural bend in it, the factory fold that is already in fanFOLDfoam. I hope you can understand what I mean, if not, I can post a pic. Hope this helps!


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