Class	Type	Weight Lbs.	Charge Lbs.	Length in.	Diam. in.
Heavy Drop Bomb	Barlow bomb			60	5
High Capacity Demolition	Mark I	104	52	47	7
	Mark II	22	9	28	5
	Mark III	52	24	36	6
	Mark IV	260	120	47	12
	Mark V	500	280	59	16
	Mark VI	1,000	500	63	21
Demolition	2,000 lb	2,000	1,000	90	18
	4,000 lb	4,000	2,000	112	23
Fragmentation	Mark I	94	13	58	6
	Mark II	19	1	30	3
	Mark III	49	6	50	5
Incendiary	Mark I	40	21	36	6
	Mark II	46	26	36	6
	Mark III	100		36	6
Practice	Mark I	22	0	27	4

Aerial drop bombs are divided into classes according to the use for which they are intended. There are three general types, viz, high-capacity (demolition), fragmentation, and incendiary, all of which have been designed and equipped to meet the requirements abroad. Changes are constantly being made in details, such as the method of suspension, to make possible the use of the bombs in new release mechanisms and planes.

High-capacity drop bombs, so called because of the large ratio of the weight of the explosive to the weight of the casing, are used for general demolition purposes. The targets engaged include fortified positions, railroad terminals and lines, heavy structures of all kinds, supply depots, ammunition dumps, etc.

Fragmentation bombs are used against personnel, such as troops in the field or on the march, or wherever the protection afforded is slight. These bombs carry a relatively small charge of explosive in a heavy steel casing and depend for their effect on the fragmentation of this casing.

Incendiary bombs are used for incendiary purposes against ammunition dumps, aerodromes, grain fields, etc. There are two types, the scatter and the intensive.

Dummy drop bombs are used for instructional purposes.