1. The 100-lb. Aircarft Smoke Bomb Mark 3 Mod 0 (Figs. 1 & 2). The 100-lb. Smoke Bomb Mark 3 Mod 0 has two movable suspension bands. It may be suspended from any bomb rack or shackle subject to the following:

(a) For external racks requiring two-lug suspension the nose baffle and suspension lugs should be in line with a plane bisecting two adjacent tail fins (Fig. 2). This is the normal position of the suspension lug.

(b) For internal bomb bay suspension from two-hook shackles or racks the suspension lugs and nose baffle must be rotated 45 degrees until they line up in the same plane as one fin of the tail.

(c) For single-hook bomb rack suspension, the leading band should be moved back to a position 20 inches behind the nose fuze. The other band should be rotated 90 degrees and positioned 8 inches behind the front band. This second band the provides a metal surface for the rear steadying fork of the bomb rack.

2. The 50-lb. Aircraft Smoke Bomb Mark 1 Mod 1 and Mark 1 Mod 2 (Figs 3 & 4). The 50-lb. smoke bombs have either one or two movable suspension bands or a movable band with an additional attached lug. They may be used with either single or double sus-pension.

3. TBF Type Aircraft Capacity. The capavity of TBF type aircraft with complete ope-rational equipment is ten Bombs Mark 1 Mod 1 or Mark 1 Mod 2, or four bombs Mark 3 Mod 0. When bomb bays are equipped with bombs only, the capacity is twelve bombs Mark 1 Mod 1 or Mark 1 Mod 2, or six bombs Mark 3 Mod 0.

4. Arming Wires. Arming wires are required for the 100-lb. Bomb Mark 3 Mod 0 or the 50-lb. Bomb Mark 1 Mod 1 or Mark 1 Mod 2 only when the fuze adapter Mark 1 Mod 0 is used.

The Smoke Bomb Mark 3 Mod 0 has a ballistic coefficient of 0.882 and an approximate maximum striking velocity of 795 feet per second.

The Smoke Bomb Mark 1 Mod 1 and Mark 1 Mod 2 have a ballistic coefficient of 0.627 and an approximate maximum striking velocity of 694 feet per second.

The Smoke Bombs Mark 1 Mod 1 and Mark 1 Mod 2 and the Smoke Bomb Mark 3 Mod 0 are all equipped with the water impact nose fuze Mark 3 Mod 1 (Fig. 5). This fuze, when installed in the bomb and the bomb released over water, functions upon impact as fol-lows: The firing pin, which is held in place by a creep spring, is driven into a primer by fluid pressure. The spit of the primer ignites a length of time fuze which give an 18-se-cond delay. The time fuze ignites a quick match which ignites the starting mixture, and this initiates the burning of the smoke mixture. Gas pressure formed by the burning smoke mixture breaks the vent disc and opens the valve cap at the tail of the bomb, permitting the smoke to be emitted.

Figure 5 - Nose Fuze, Mark III, Mod 1 and Ignition
(Water Impact)

The Floating Smoke Bomb Fuze Adapter Mark 1 Mod 0 (Fig. 6) is an adapter designed for use with the 100-lb. Aircraft Smoke Bomb Mark 3 Mod 0 and the 50-lb. Aircraft Smoke Bomb Mark 1 Mod 1 and Mark 1 Mod 2. These smoke bombs are shipped with the water impact Fuze Mark 3 Mod 1. By means of the Fuze Adapter Mark 1 Mod 0 the Fuze Mark 3 Mod 1 will function on either land or water impact. The adapter may easily be installed over the fuze in the field without modification to the bomb. The adapter is installed over the fuze and secured by tightening three set screws on the base of the adapter. After the bomb is installed in the airplane, the arming wire is threaded into the adapter and adjusted to protrude about four inches. Two Fahnestock safety clips are slipped over the end of the arming wire, the safety wire is removed. The bomb is ready for take off. When the bomb is released from the plane the arming wire is pulled releasing the spring loaded guard which falls free and the adapter is armed. Upon impact the push pin is forced into the firing pin, which is driven into the primer. The ignition is then similar to that described in paragraph E above.

Figure 6 - Adapter Mark 1 Mod 0 for Aircraft Smoke Bomb
Mark 1 all Mods and Mark 3 Mod 0

The Navy floating smoke bombs were originally designed for use over water only, and should not be used over land unless a Fuze Adapter Mark 1 Mod 0 is installed. Tests in-dicate that these bombs function satisfactorily when used under the following conditi-ons:

Over 5000

1500-5000

Below 1500

3-10

Up to 2500

5 or greater