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RECOIL MECHANISM---15-POUNDER GUN NO. 12.
Gun rotated so as to be right side up.
On gauged length L, across top of oscillating slide at rear end.
Applied loads.	Gauge readings.		Remarks.
	Direct movement.	Set.	
Pounds.	Inch.		
1,000	0.		
10,000	.0373		
20,000	.0540		
30,000	.0636		*
40,000	.0685	—.0020	
40,000	.0682	—.0013	
On gauged length M, across top of oscillating slide midway of slide.
1,000	0. ‘		
10, 000	.0022		
20,000	.0280		
30.000	.0348		
40,000	.0399		
10,000	.0183	.0007	Repeated.
On transverse gauged length N, across front of oscillating slide.
[Shows a movement of gauged points toward each other slides closing m.
1,000	0.		1
10, 000	.0009		
20,000	.0014	
30,000	. 0015		 	
40,000	.0016	—. 0002 ]
right cheek, abreast the on gun.
On longitudinal gauged length O, from trunnion, of oscillating slide, to fixed block
1,000	0.		
10, 000	.0128		
20,000	. 0282		
30,000	.0439		
40,000	. 0585	.0016	
40,000	.0603	.0014	Repeated.
40,000	.0590	.0010	Repeated.
.0n longitudinal gauged length P, from left side, abreast the trunnion, of the oscillating slide, to fixed block on gun.
1,000	0.	
10,000	.0176	
20,000	.0339	
30,000	.0493	
40,000	.0635	.0003
On gauged length L.
1,000	0.	
10,000	.0375	
20,000	.0541	
30,000	.0642	
40,000	.0693	
50,000	.0733	.0009
60,000	.0790	.0013
H. Doc. 508----13