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Old Jul 26, 2008, 04:47 PM
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Old Jul 27, 2008, 03:07 AM
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During our "soaring vacation" in Denmark, our two Fox's performed great both in light and medium (10-12m/s) wind conditions. As mentioned earlier, CG is at 1.5" and this seems to be OK. As an improvement, I would suggest to move the wing joining carbon rod to the normal location for a main spar, maybe incorporate it with the molded in carbon tube, that then will have to be 90 dgr on the wing root cord. Another improvement is to have a carbon tube inside the stab, mostly to avoid warping. EPP tends to change shape permanently if bent for some time! One of our elevators was curved by just laying on the table with 1/3 of it unsupported! I have also noted some warping of the inner part of the trailing edge of the wing.

Fred
Old Jul 27, 2008, 08:56 AM
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Dear Fred

Thank you very much for your suggestion.
Yes, the main spar better can located on the CG position and this is my original design.
But this is not success on the foam molding for some of reason (can't tell at the moment.)
I may try to slove this problem on next lot of production.

About the warping issue, one of the solution is use new PN material.
That is something between EPP and EPS but not EPO.
You will see this materail using on F-35 very soon.

Keep you comment in, thank!

Ming Lou
Old Jul 27, 2008, 05:31 PM
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Yesss ! Look ! It flies !
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HELP : No more wingtip!


Hi all, Hi Ming!
During my vacations in the French Alps, I flew my Fox again and it was great, but after a landing in higher grass, I didn't immediately notice the right wingtip had been broken just after the aileron... and I didn't find it back Is it possible to have (buy) it appart , or do I need to find another Fox owner to make a new one with fibre ?
Old Jul 28, 2008, 03:45 AM
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Quote:
Originally Posted by Ming
That is something between EPP and EPS but not EPO.
You will see this materail using on F-35 very soon.
That's good since EPO is forbidden in all kind of sports .
It's amazing how many types of foams it's possible to make, and how different their characteristics are.

Fred
Old Jul 28, 2008, 05:57 AM
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Quote:
Originally Posted by fragamort
Hi all, Hi Ming!
During my vacations in the French Alps, I flew my Fox again and it was great, but after a landing in higher grass, I didn't immediately notice the right wingtip had been broken just after the aileron... and I didn't find it back Is it possible to have (buy) it appart , or do I need to find another Fox owner to make a new one with fibre ?
I'm sure the Windrider site lists all the seperate parts for sale.
Old Jul 29, 2008, 11:07 PM
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Quote:
Originally Posted by cvanscho
I'm sure the Windrider site lists all the seperate parts for sale.
Don't be so sure.
Old Jul 29, 2008, 11:11 PM
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Quote:
Originally Posted by flarssen
During our "soaring vacation" in Denmark, our two Fox's performed great both in light and medium (10-12m/s) wind conditions. As mentioned earlier, CG is at 1.5" and this seems to be OK. As an improvement, I would suggest to move the wing joining carbon rod to the normal location for a main spar, maybe incorporate it with the molded in carbon tube, that then will have to be 90 dgr on the wing root cord. Another improvement is to have a carbon tube inside the stab, mostly to avoid warping. EPP tends to change shape permanently if bent for some time! One of our elevators was curved by just laying on the table with 1/3 of it unsupported! I have also noted some warping of the inner part of the trailing edge of the wing.

Fred
My wings and stab were warped right out of the box.
Old Jul 30, 2008, 03:39 AM
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Quote:
Originally Posted by planekrazee
Don't be so sure.
My mistake . I'm sure Ming would be open to selling parts.

As for the EPP material, there are pros and cons to various foams. In the case of the Fox, Ming did the development to a large extent in consultation with members of this forum. IICR, he wanted to mould the Fox in EPS, but the very clear call from members was for EPP so that the plane would be tough enough for slope use. He must be tearing his hair out now when he hears of complaints about the use of EPP!

My Fox came out of the box as straight as a die.

Chris
Old Jul 30, 2008, 09:23 AM
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Dean
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Quote:
Originally Posted by cvanscho
My mistake . I'm sure Ming would be open to selling parts.

As for the EPP material, there are pros and cons to various foams. In the case of the Fox, Ming did the development to a large extent in consultation with members of this forum. IICR, he wanted to mould the Fox in EPS, but the very clear call from members was for EPP so that the plane would be tough enough for slope use. He must be tearing his hair out now when he hears of complaints about the use of EPP!

My Fox came out of the box as straight as a die.

Chris
And we're glad he did use EPP. The planes are holding up well to the abuse. A few pieces of carbon do wonders. I covered the wings with the light "New stuff" as well. I have thought of glassing a EPS Fox to see what would happen..

Dean...
Old Jul 31, 2008, 09:58 AM
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We do everything possible to keep the wing straight on production, packing and shipment.
See the super thick cardboard between two wings on the packing.
Who like EPS Fox? I may able to make limited edition in the future.

Ming Lou
Old Jul 31, 2008, 10:51 AM
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Just chillin @ 403 MPH
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It's pretty easy to take any warp or twist out of wings and stabs while covering the parts,,,but on the other hand I've known people that can put warps and twists into a perfectly strait wing durring the covering process, JMO,,lol

Oh yeh,,raw foam should be saved for kids to toss around in the front yard free flight style.

Nick
Old Aug 02, 2008, 01:15 PM
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Send me an email if need spare parts for Fox.
I am more than happy to do some to fix up you Fox.

Ming Lou
Old Aug 03, 2008, 04:25 AM
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I'm torquing to you!
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We had 3 Windrider Foxes at our outlanding comp today along with an assortment of other planes. The Foxes stole the day.

http://www.swenban.rchomepage.com/page.php?id=18
Old Aug 03, 2008, 04:56 AM
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Leaning doesn't help
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Not quite Mr K, I snapped the wing on mine? I've glued it so many times now, its almost a composite glider Hey Ming, do you sell just wings?


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