Mid-Upper Turret

Manufacture :
Fraser-Nash

Model : FN-50

Method of power transmission : Hydraulic

Source of power: Engine Drive Pump

Hydraulic operating pressure 300 lb. per sq. inch.

Field of fire : Azimuth -360 deg.
Elevation - 60 deg.
Depression - 45 deg.

Armament : Two - 0.303 Machine Guns

Firing control mechanism Electro-Hydraulic

Gun Sight
Free gun reflector sight Mk. III, Mk. III A, Mk. III N

The operating levers (aka Tabo arms) tracked along the top of the Cam Ring. As the arm rose a gun interrupter mechanism engaged and prevented the guns from firing. Which in turn stopped the gunner from shooting off the tail, Rudder or into the fuselage.

Lancaster: Mid-Upper Turret

Updated:January 2008

Manufacture :	Fraser-Nash
Model :	FN-50
Method of power transmission :	Hydraulic
Source of power:	Engine Drive Pump
Hydraulic operating pressure	300 lb. per sq. inch.
Field of fire :	Azimuth -360 deg. Elevation - 60 deg. Depression - 45 deg.
Armament :	Two - 0.303 Machine Guns
Firing control mechanism	Electro-Hydraulic
Gun Sight	Free gun reflector sight Mk. III, Mk. III A, Mk. III N