Dodac N

| UNO serial number 0107

UNO proper shipping name Fuzes, detonating

Explosive Components:

M53 Delay Arming Element; M98 Superquick Detonator; M76 Delay Detonator; RDX Lead Charge and Booster Pellet.

Limitations:

None.

References

SC 1340/98-IL TM 9-1300-251-20

FUZE, POINT INITIATING: M90A1 or M90

FUZE, POINT INITIATING: M90A1 or M90

Element Delay

Type Classification:

C & T OTCM 37119 dtd 1959.

Use:

Fuze M90A1 or M90 is a single-action, super quick point-initiating fuze designed for use with 57mm HEAT projectile.

Description:

The fuze has a diecast aluminum body with a neck extending forward to house a primer. A rotor with a lock and lock spring is mounted transversely in the fuze body, and carries a detonator. An auxiliary booster housing threaded into the base of the fuze body carries a booster charge. The base of the fuze body is threaded internally for assembly over the nose of the projectile, and the entire forward end with mechanical parts is covered with a thin steel ogive.

Functioning:

After firing, centrifugal force from projectile rotation withdraws the rotor lock against the lock spring. The rotor cannot move while affected by the setback force of firing, but after setback the rotor turns to align the detonator with the primer and with the auxiliary booster charge. On impact, crushing of the ogive fires the primer which initiates the detonation train to the projectile.

Tabulated Data:

Length:

Explosive Components:

Primer M56, Detonator M30A1, and auxiliary Booster M122.

References:

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