The artillerist's manual and British soldier's compendium

by F. A. Griffiths

4⅖ inch Mortar.—To the range in yards add 300, and multiply by ·06, for the charge, in drams.

To find the Time of flight, the range being given. Divide the square root of the range, in feet, by 4·5 for the time of flight, in seconds.

To find the Range, the Time of flight being given. Multiply the time of flight, in seconds, by 4·5, and square the product for the range, in feet.

To find the length of Fuze,[8] for a given range. Multiply the time of flight, in seconds, by ·22, for the 13, and 10 inch mortars, and by ·24 for 8, 5½, and 4⅖ inch mortars, for the length of fuze, in tenths.

Mortar Practice at 15°, 25°, and 45° Elevation. 1838.
13 INCH IRON.					10 INCH IRON.					8 INCH IRON.
Weight		36 cwt.			Weight		16 cwt. 2 qrs.			Weight		8 cwt. 1 qr.
*Shell filled			200 lb.		Shell filled			92 lb.		Shell filled			46 lb.
Burst. powder			6 lb. 12 oz.		Burst. powder			2 lb. 10 oz.		Burst. powder			1 lb. 14 oz.
Blowing powder			2 oz.		Blowing powder			1½ oz.		Blowing powder			1 oz.
Eleva- tion.	Charge.		Fuze.	Range.	Eleva- tion.	Charge.		Fuze.	Range.	Eleva- tion.	Charge.		Fuze.	Range.
degs.	lb.	oz.	in.	yds.	degs.	lb.	oz.	in.	yds.	degs.	lb.	oz.	in.	yds.
45	2	1½	1·9	450	45	1	½	1·9	450	15		14	·8	500
	2	3	2·	500		1	2	2·	500		1		1·	550
	2	4¾	2·1	550		1	3¼	2·1	550		1	2	1·1	600
	2	6	2·2	600		1	4¾	2·2	600	45		9½	1·9	450
	2	7¾	2·3	650		1	6	2·3	650			10¾	2·	500
	2	9½	2·4	700		1	7½	2·4	700			12½	2·1	550
	2	11¾	2·45	750		1	9	2·45	750			13¾	2·2	600
	2	14	2·5	800		1	10	2·5	800			14½	2·3	650
	3	½	2·55	850		1	11	2·55	850			15½	2·4	700
	3	3	2·6	900		1	12	2·6	900		1		2·45	750
	3	5½	2·65	950		1	13	2·65	950		1	½	2·5	800
	3	8	2·7	1000		1	14	2·7	1000		1	1¼	2·55	850
	3	10	2·75	1050		1	15¼	2·75	1050		1	2	2·6	900
	3	12	2·8	1100		2	½	2·8	1100		1	2¾	2·65	950
	3	14	2·85	1150		2	1¾	2·85	1150		1	3½	2·7	1000
	4		2·9	1200		2	3	2·9	1200		1	4	2·75	1050
	4	5	3·	1300							1	4¾	2·8	1100
	4	15	3·2	1500							1	5¼	2·85	1150
	5	10	3·4	1700							1	6	2·9	1200
* The Shells were filled with sand.

	Part 2 of 2
5½ INCH BRASS.					4⅖ INCH BRASS.
Weight		1 cwt. 1 qr. 10 lb.			Weight		3 qrs. 19 lb.
Shell filled			16 lb.		Shell filled			8 lb.
Burst. powder			10 oz.		Burst. powder			5 oz.
Blowing powder			½ oz.		Blowing powder			½ oz.
Eleva- tion.	Charge.		Fuze.	Range.	Eleva- tion.	Charge.		Fuze.	Range.
degs.	lb.	oz.	in.	yds.	degs.	lb.	oz.	in.	yds.
15	6		·7	350	15	4	8	·8	450
	7		·75	400		4	12	·85	500
	7	8	·8	450	25	4		1·1	540
	8		·85	500
25	5	8	1·1	480
45	4	8		300	45	2	6	1·65	300
	4	12		350		2	9	1·7	350
	5		1·75	400		2	12	1·75	400
	5	4	1·8	450		3		1·8	450
	5	8	1·85	500		3	4	1·85	500
	5	12	1·9	550		3	8	1·9	550
	6		1·95	600		3	12	1·95	600

Greatest Charges, and Ranges.

	lb.	oz.	yds.
13 Inch, Sea	20	0	4200
10 ”	10	8	4000
13 Inch, Land	9	0	2900
10 ”	4	0	2400
8 ”	2	0	2000
5½ ”		9	1200
4⅖ ”		4·5	1000