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				 - Torque in foot pounds for wing bolts for a 1946 C Model Ercoupe
 
Torque in foot pounds for wing bolts for a 1946 C Model Ercoupe
- Ronald Raty
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						08 Feb 2020 12:29				#1
		by Ronald Raty
	
	
		
			
	
			
			 		
													
	
				Replied by Ronald Raty on topic Torque in foot pounds for wing bolts for a 1946 C Model Ercoupe			
			
				From:  www.univair.com/content/ERC_SB31_Rev1.pdf
NOTE:
The recommended method for tightening the nuts on the wing attach bolts is to draw nuts down tight and continue tightening as required to line up the nearest slot and cotter pin hole provided you do not exceed 100 ft-lb dry torque on the front bolts and 10 ft-lbs dry torque on the rear bolts. Safety wing attach bolts with NEW cotter pins: AN380-4-4 (MS24665-353) for front and AN380-2-2 (MS24665-132) for rear fittings. DO NOT reuse old cotter pins.
It is interesting they don't mention a minimum torque, other than "draw nuts down tight" which could mean almost anything. That would make sense if we assume the wings are held on purely through shear of the bolts, and not friction resistance of the bolted brackets being squeezed together.
					NOTE:
The recommended method for tightening the nuts on the wing attach bolts is to draw nuts down tight and continue tightening as required to line up the nearest slot and cotter pin hole provided you do not exceed 100 ft-lb dry torque on the front bolts and 10 ft-lbs dry torque on the rear bolts. Safety wing attach bolts with NEW cotter pins: AN380-4-4 (MS24665-353) for front and AN380-2-2 (MS24665-132) for rear fittings. DO NOT reuse old cotter pins.
It is interesting they don't mention a minimum torque, other than "draw nuts down tight" which could mean almost anything. That would make sense if we assume the wings are held on purely through shear of the bolts, and not friction resistance of the bolted brackets being squeezed together.
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- Thomas Ryan
 - Topic Author
 
			
	
						08 Feb 2020 06:04				#2
		by Thomas Ryan
	
	
		
			
	
			
			 		
													
	
				Torque in foot pounds for wing bolts for a 1946 C Model Ercoupe was created by Thomas Ryan			
			
				What torque pounds do I used for all the wing bolts on my 1946 C model Ercoupe when I reinstall the wings?			
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