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Author Topic: My new A/B Marval  (Read 541 times)
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danberry
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« on: August 24, 2014, 08:16:51 PM »

This is the new one.
20.6 oz when covered. I don't have a photo of it covered.
It has flown but is not trimmed yet.
Attached files Thumbnail(s):
My new A/B Marval
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Randy Reynolds
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« Reply #1 on: August 24, 2014, 08:45:42 PM »

560?
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PeeTee
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« Reply #2 on: August 25, 2014, 04:08:07 AM »

Looks nice. Is the fuselage a tapered carbon tube?
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duration
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« Reply #3 on: August 25, 2014, 06:42:24 AM »

Dan:

Nice looking model. Is this the Nelson .21 Marval 560 you were flying at the Nats?  Or an even newer one?  If I recall, you used a Seilig carbon tube, which are no longer available. Any idea of new sources?  (CST used to sell two F1C-type carbon fiber fuselages, but they are not listed on the latest website.)

Any thoughts on the advantages/disadvantages of carbon fuselages for Power?  How does weight compare with built-up balsa fuselage.

Louis
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danberry
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« Reply #4 on: August 25, 2014, 09:45:58 AM »

560 inches on the wing.

Seelig tube on the fuselage. I don't know if the tube makes things lighter. It IS rigid. The tube requires some adventure getting the firewall, pylon and stab mounted.
I don't know if CST will make them. They have the mandrel but Gewain sold the business so ... not certain of the status.

I worked on trimming it at the NATS. It's pretty close. I did fly it in B Gas. I had been concerned about whether the wing was good enough.
I launched it sorta flat. It didn't go up so much as out. The wing held......
I didn't post the score.
For A Gas and A/B Classic I flew the old 24.5oz plane. It is pretty well trimmed.
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taft8563
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« Reply #5 on: August 25, 2014, 10:13:45 AM »

 [email protected]  This is the email for the man that owned CST I have talked to him and he is making the carbon fiber tubes.
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