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Old 09-07-2020, 12:44 PM
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AlexPeterson AlexPeterson is offline
 
Join Date: Sep 2005
Location: Maple Grove, MN
Posts: 2,406
Default Pitch Angle Data

With the data from the G3X, I created the following plots.

This is one with the aircraft in the hangar. I simply pushed the tail down to within about 1/2" of the floor and returned it (no tail tie-down eye in place):



This data is during several seconds of the landing phase:



Discussion: I made special note of forward visibility just at the point of touchdown. I'm 72" tall, 34" inseam, Bose headset maybe 1" from the canopy. Just before touchdown, I lost the horizon (head not tipped up), and my eyes immediately went perhaps 20 degrees left for the next couple seconds. The pitch angle was almost 9 degrees. Note that this is about 5 degrees away from tail striking, assuming no landing gear deflection. Note also that the stall warning was not going off.

I believe a firm, full stall landing in the 6A could put the tail within striking distance of the ground.

Thumbnails for posterity:
Attached Thumbnails
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Name:	N66AP Pitch Angle at Touchdown 7SEP20.jpg
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ID:	2135  Click image for larger version

Name:	N66AP Pitch Angle at Tail Touching 7SEP20.jpg
Views:	78
Size:	58.5 KB
ID:	2136  
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Alex Peterson
RV6A N66AP 1700+ hours
KADC, Wadena, MN
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