my sig 300xs will not loop!!!
12-04-2002, 09:22 PM
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my sig 300xs will not loop!!!
any suggestions on why my 300xs will not cut a loop. all controls have the right throw it is well balanced and has a zenoah g23 gas engine? 
well i checked the cg by the wing tip with it upside down and it seemed fine.
12-05-2002, 01:06 AM
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my sig 300xs will not loop!!!
The guys i fly with at the club said all low wings are to be balanced upside down to compensate for the fuselage weight. i'm not sure. i know it is way tail heavy uprught and slightly nose heavy upside down.
12-05-2002, 01:12 AM
#8
my sig 300xs will not loop!!!
This is correct all low wing airplanes are balanced upside down. With the plane inverted the fuse acts like a pendulum and makes it easier to balance on the balance point. It makes no difference whether you balance at the fuse or the wing tip as long as you draw a perpendicular line from the center line of the fuse through the CG point to wing tips.
I hope this helps.
Andy
I hope this helps.
Andy
12-05-2002, 01:38 AM
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my sig 300xs will not loop!!!
This is not 100% true. On the Sig I don't know if this is true. On the new GP Extra the CG reference is from the wingtips.
If he is measuring the CG from the wingtips on an Extra, he will be more nose heavy if he measures it from the fuselage. I think this will aggravate his problem.
If he is measuring the CG from the wingtips on an Extra, he will be more nose heavy if he measures it from the fuselage. I think this will aggravate his problem.
Originally posted by Crash90
I am not familiar with this plane but CG is measured where the wing meets the fuselage not at the wing tip.
I am not familiar with this plane but CG is measured where the wing meets the fuselage not at the wing tip.
12-05-2002, 01:45 AM
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my sig 300xs will not loop!!!
If I remember the instructions on the Sig Extra they give you two dimensions to set CG with. One dimension is at the fuse side, the other is at the wingtip, the choice is yours. They also say to balance the aircraft upside down.
Vince
Vince
12-05-2002, 01:54 AM
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my sig 300xs will not loop!!!
I KNOW ALL MY OTHERS LOOP GREAT AND I HAVE BUILT 12 IN ALL.
IT MAY HAVE SOMETHING TO DO WITH THE ENGINE POWER TO PROP RATIO!
IT MAY HAVE SOMETHING TO DO WITH THE ENGINE POWER TO PROP RATIO!
12-05-2002, 02:51 AM
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my sig 300xs will not loop!!!
check the c/g at the fuse with the plane upside down,and the G23 has a tad more power than the OS 120 FS,300 I flew had a 180 up front and would loop till fuel was gone.Might need few more ponies up front.
12-19-2002, 04:57 AM
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my sig 300xs will not loop!!!
got a G-38 on my 300xs and it rips!balance the plane upside down,and try to get it level.the plane,or i say my plane flies its best dead level.it is easier to balance the plane next to the fues.loops,roles,spins,and tumbles are all very smooth and pin point.Mine is at the suggested 27% acording to the manual.The manual does give (fuse side)and (wing tip) balance points. 
