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Old May 11, 2011, 01:13 PM
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United Kingdom, England, North York
Joined May 2011
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Nine Eagles Sky Runner Trimming

Hi

Just got Nine Eagles Sky Runner electric powered glider. Only flown free flight gliders (30 years ago) RC planes, boats and cars. The plane porposies when under power the more the power the bigger they get. Glides OK when not under power. Think it is just the trim but with both weight and elevators not sure were to start. In the past the balsa modles I built had c/of/g marked on the plans, no marks on plane and no real instruction. Under very low power I have kept it in the air for 20 min so getting hang of it.
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Old May 11, 2011, 02:23 PM
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Gerry__'s Avatar
United Kingdom, London
Joined Jan 2005
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Sounds like the COG is a bit too far back. But then again, if it glides nicely, then it's not far out.

It really depends what you want. If you're mostly climbing under power and gliding down, then leave it and see if just trimming will work. But if you're mostly under power, then move it back a few mm and see what happens.
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Old May 11, 2011, 07:00 PM
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United Kingdom, England, North York
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Thank you got it a bit better tonight glide near perfect under low power fine but on full power bad. Mansged to have a single flight of 30 min so not doing to bad. I will play around ith cog in the morning
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Old May 12, 2011, 08:55 AM
Yeeah buddy!
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Joined May 2010
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Yep, CG must be too rearward.
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Old May 15, 2011, 11:25 AM
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United Kingdom, England, North York
Joined May 2011
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Hi

Yes cpg wrong to far back put penny on and porposing nearly gone, glide very good still so very happy. Just want air time then on to one with areolons
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Old May 29, 2011, 10:52 AM
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Netherlands
Joined Dec 2009
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Did you put the penny in the nose of the sky runner? So this means the CG has been moved forward. What's the position of your CG now at this moment?

Regards Gert
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