Larger Airworld Cougar Potental issues?
02-06-2018, 02:39 PM
#1
Larger Airworld Cougar Potental issues?
Hey team. I was reading post on this site that stated there was known issues with the larger Airworld Cougar. Something about ali flutter and elevator flutter on the panther.
Im restoring one now, fixing a lot of cosmetic issues (someone used to strong of a stripper, and hard sanding block to remove paint).
Now Ia is the time to make any improvements. So what fixes / issues you know of?
Im restoring one now, fixing a lot of cosmetic issues (someone used to strong of a stripper, and hard sanding block to remove paint).
Now Ia is the time to make any improvements. So what fixes / issues you know of?
02-06-2018, 03:25 PM
#2
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mike,
Search "airworld cougar." A thread of that exact title had a flyer loose both ailerons and another lose one. They seemed to write off to weak servo arm. Strong tight servo and linkage only masks the problem but you still get your airplane back. Chief way to actually prevent is to balance the control about its pivot center which will about double the weight since you have to have just as much mass in front of the pivot as behind. And even that only pushes the potential for flutter outside normal envelope.
I posed the question but never got an answer whether live hinges were inherently flutter resistant. When you jump to the x2? 76 lb and up AMA class actual control static balance is required.
Charles
Search "airworld cougar." A thread of that exact title had a flyer loose both ailerons and another lose one. They seemed to write off to weak servo arm. Strong tight servo and linkage only masks the problem but you still get your airplane back. Chief way to actually prevent is to balance the control about its pivot center which will about double the weight since you have to have just as much mass in front of the pivot as behind. And even that only pushes the potential for flutter outside normal envelope.
I posed the question but never got an answer whether live hinges were inherently flutter resistant. When you jump to the x2? 76 lb and up AMA class actual control static balance is required.
Charles
02-06-2018, 10:10 PM
#3
There are no issues with correctly installed servo, tight linkages. The live hinge is not prone to flutter, the Cougar surfaces are not prone to flutter either. It’s a aeroplane where everything is left to the builder and some people’s standards are well below par
