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Sportmaster CG

Old 01-15-2017, 04:58 PM
  #1  
Steve27597
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Default Sportmaster CG

I picked up what I think is an Andrews Sportmaster.. I have put an OS 65AX on it and gotten it ready for flight, but is seems tail heavy. I have seen the plans in this forum, but I can not tell what the measurement is from the LE. Can anyone tell be how far back the CG is?
Thanks,
Steve
Old 01-15-2017, 05:11 PM
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All Day Dan
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Put the CG at 30% of the chord behind the leading edge. Dan.

http://www.outerzone.co.uk/plan_details.asp?ID=2845
Old 01-23-2017, 01:04 PM
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Steve27597
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Thanks Dan. I ended up adding some weight to the front and will see how it flies.
-Steve
Old 01-23-2017, 01:55 PM
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Don't forget to mention how the maiden flight went.
Old 01-24-2017, 08:37 PM
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Truckracer
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The plans show 4" from LE but from experience, it isn't critical. I still have a Sportmaster in the hanger.

Wing is constant chord @ 12" so I guess that puts the CG at 33.3%. The fairly standard 30% as Dan suggested would work just fine.

Last edited by Truckracer; 01-25-2017 at 09:45 AM.

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