RECOIL MECHANISM---15-POUNDER GUN NO. 12.
204
Gun in firing position.
Gauge length from fixed block on gun to a point on the left trunnion. Steel filling pieces in cylinder, counter recoil springs having been removed.
Initial load.
Micrometer reset to zero under initial load.
Applied loads.	Gauge reading.	
	Direct movement.	Set.
Pounds.	Inch.	Inch.
1,000	0.	
10,000	.0265	
20,000	.0600	
30,000	.0877	
40,000	.1134	
50,000	. 1332	
60,000	. 1510	
50,000	.1485	
40,000	.1478	
30,000	. 1421	
20,000	.1247	
10,000	.0893	
1,000		.0465
1,000	0.	
10,000	.0159	
20,000	.0382	
30,000	.0560	
40,000	.0723	
50,000	.0880	
60,000	.1041	
50,000	.1020	
40,000	.0994	
30,000	.0958	
20,000	.0809	
10,000	.0411	
1,000		.0002
60,000	.1070	
1,000		.0005
60,000	.1067	
1,000		.0007
60,000	.1066	
1,000		.0007
Gauged length from fixed block on gun to a point on the center of the right trunnion.
1,000 10,000 20,000 30.000 40.000 50.000 60.000	0.		
	.0118		
	.0305		
	.0474		
	.0631		
	.0794		
	.0939		
50;000 40.000 30.000 20.000 10,000 1,000 60,000 1,000	.0925		
	.0902		
	.0871		
	.0757		
	.0415		
		.0012	
	.0939		
		.0006