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F4D Skyray eleven reflex?

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F4D Skyray eleven reflex?

Old 07-10-2014, 06:09 PM
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RC_MAN
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Default F4D Skyray eleven reflex?

I'm going to test fly my Skyray shortly. I'm not using the trim flaps they are set at neutral. How much up reflex do I need in the elevons?
Thanks for the help
Old 08-16-2014, 01:52 PM
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RC_MAN
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Anyone?
Old 08-17-2014, 01:18 PM
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I don't know what particular model you are referring to but my scratch built 36" span F4D has none at all. It seems the natural stability of its 'ogee' delta is quite adequate.
Old 08-17-2014, 03:21 PM
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Rob B.
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I have one of the Global jet club Skyrays, the elevons are neutral.
Old 08-18-2014, 06:59 PM
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Thank you
Old 08-26-2014, 06:18 AM
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combatpigg
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The amount of "reflex" needed for models is usually just a slight amount of UP trim once you are airborne, if any.
If the CG is within limits of where it has the best dead stick glide and if the wing loading is relatively low, the less your need for UP trim.
When I first got into this hobby, I read articles written by those who claimed that model flying wings and deltas needed special airfoils, but that has been mostly debunked as voodoo witchcraft by now.

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