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  #31  
Old 05-12-2014, 01:24 PM
AV8AZ AV8AZ is offline
 
Join Date: Nov 2013
Location: Phoenix, Arizona
Posts: 60
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Quote:
Originally Posted by Russ McCutcheon View Post
I outlined the key, low airspeed wile still loaded, the tail stalled, been there done that. More speed on entry and a little more G at entry will get you to the top before it slows to a stall speed. this happens a lot easier two up then solo.
For this and other oil canning theories, is there another flight configuration and condition that could be attempted that would provide similar dynamics to the "coming over the top" stresses on the airframe?

And for an out-there and maybe unsafe suggestion on testing for oil canning in the rear fuselage: could one temporarily affix arrow stock or similar to the skins with 200mph tape either internal or external (simultaneous to multiple skins) to see if this would eliminate the bang?
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  #32  
Old 01-25-2020, 07:34 AM
Jimzim Jimzim is offline
 
Join Date: Mar 2009
Location: Arvada, CO
Posts: 118
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Potential (small) bird strike?
That doesn?t always leave a mark... just a thought.
Good luck, Jim
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2015 RV7 I0-360 FP
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  #33  
Old 01-25-2020, 08:20 PM
oaklandaviator oaklandaviator is offline
 
Join Date: Dec 2014
Location: Somerville, Tn and Little Rock, Ar
Posts: 116
Default RV-8?

If it's an RV-8 then there's a good chance it's the canopy. Two up at about 4 g or so doing a loop will cause slight separation at the wing root which grabs at the canopy as you go around. Tries to pull the canopy out from the fuselage at the back then it slams down causing a loud pop and can also cause some air to blow on your passenger.

Was very disconcerting the first couple of times it happened to me. When flying with a passenger, use a higher entry speed and lower g during loops and the problem should disappear. You can also mount strakes on the fuselage in front of the wing to help keep the airflow attached at the root.
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