Avro Arrow foamie EDF Conversion - Page 6 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-15-2013, 09:36 PM   #51
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Re: Avro Arrow foamie EDF Conversion


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Thank You. The photos are mine and just a tiny sample of today's event. The weather was very good & I'd say everyone had a great time even though there were a few crashes. I'll have that album on line sometime this week & will add the link to the Fan Fair thread. As for the Arrow photos I'll be giving John the full set of the flight from start to finish plus buy one of the kits even though it's way beyond my flying skill set. I'll hang mine in my shop as a reminder of my youth when I got to see the real thing fly many times before the program was scrapped.
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Old 06-20-2013, 07:05 PM   #52
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Re: Avro Arrow foamie EDF Conversion

John I'm ready to start my build but have to confess that this is my first non balsa & spruce build so it's a bit new to me. Can you clarify that I understand the shaping of the wing. It sounds like I sand the leading edge to the shape a trainer airfoil would use (rather than both edges to the centre like a symmetrical airfoil) BUT my trailing edge taper is underneath & I don't sand the top other than to smooth out any work done where the fiberglass rods go.
One other question relating to the covering. I was thinking of trying Worldtax Fabric but wonder if it's heat shrinking application may be strong enough to warp as I apply it. If you think there's a risk I'll stick with the fiberglass procedure you suggest (& I have all the materials on hand).

Thanks, Larry
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Old 06-20-2013, 09:25 PM   #53
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Re: Avro Arrow foamie EDF Conversion

Hi Larry,

Yep, you are correct, the leading edge is block sanded to the basic shape of a flat bottom Clark-Y airfoil. The tapering of the trailing edge of the wing all takes place on the bottom surface, look carefully at the pictures in the manual its a very gradual taper. Just have a constant thickness of trailing edge material left, the thickness is mentioned. Don't sand it to a very thin trailing edge, it'll be too weak and damage easily.

The wing and the vertical fin can be wrapped easily, particularly the vertical fin, that's why I chose the fiberglass and water based urethane. Even though there is some shrinkage, it's not much. But you have to do both sides at the same time so the shrinkage affects each side the same, this cancels out the warp stresses.

Please contact me no my e-mail address john@modelsbyjohn.com I do not check the forum as often as I do my e-mails.
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Old 06-20-2013, 09:44 PM   #54
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Re: Avro Arrow foamie EDF Conversion

Thanks John. Other than that I think your build thread & instructions will get me through it. Fully understood the fact I needed to cover & varathane both sides at once to prevent a warp.
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Old 10-03-2013, 09:15 AM   #55
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Re: Avro Arrow foamie EDF Conversion

Hi John. I was wondering where the cg is located on the arrow in relationship to the wing notch. .
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Old 10-17-2013, 10:03 PM   #56
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Re: Avro Arrow foamie EDF Conversion

Hi Mark, the CG is just ahead of the notch about an inch
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Old 03-01-2015, 11:19 PM   #57
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Re: Avro Arrow foamie EDF Conversion

Just bumping the thread so I can find it easily. I'm considering of doing a third.....and final version of the foam Arrow. Some features will be included in the twin 50 mm version, but the next version will be capable of unlimited vertical performance, at least, that's the goal.

Still not home yet, but will get cracking on it as soon as I get back. Until then, any thoughts or wishes?
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Old 03-02-2015, 08:19 PM   #58
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Re: Avro Arrow foamie EDF Conversion

Keep me in mind when you get back here in the GWN (Great White North) -- interested in seeing what you do have available, preferably in an EDF.

Guess that you're glad to be where you are and not facing negative double-digits.
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Old 03-02-2015, 09:28 PM   #59
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Re: Avro Arrow foamie EDF Conversion

John, have you ever considered doing a twin 70 or 90 arrow?
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Old 03-02-2015, 11:25 PM   #60
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Re: Avro Arrow foamie EDF Conversion

any chance I could get a price on a kit? I have been playing around with my own balsa arrow . I drew in high school. back in the day ( .049 powerd) and a depron version powerd by a eps300. both pushers.. now just interesd in something that wont rip the motor off on landing..

thanks
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