Junkers Jumo 211 D with blower height = 1500 m
|on ground up to 6 km height||above 6 km height|
Powered by Jumo211D with Constant Speed prop. WEP lever present but deactivated. Supercharger operation with nominal height of 1500 m. Auto Dive Recovery and weapon release. Armament Single rearward facing 7.92mm MG 2 x 7.92mm Forward Firing MG, Various bomb types Dive Angle reference lines are scribed on the Right hand canopy pane The aircraft is equipped with the AFN-2 gauge which is utilised for beacon homing and Lorenz approach system
Warm up with Rads Closed till
Modulate Coolant and Oil rads as required. Suggest full open for Ground operations.
The Ju87 Has a semi automatic Dive Bombing system. This system provides an Automatic Dive recovery after bomb release. The system is engaged when the dive brakes are extended. When this occurs the Elevator trim is biased nose down and held in a nose down position by spring pressure under control of a solenoid. The pilot can allow this action to set the dive or manually enter the dive himself. Manual Elevator trim input must not be used during dive deliveries. Once established in the dive the pilot positions the Sight reticle as required using conventional flight control input.
Bomb Release altitude is a function of dive recovery altitude, Min fuse arming time and frag separation. The minimum altitude that can be set is 25m. Dive recovery system operates. A Contact altimeter is used to initiate weapon release and automatic dive recovery.
The pilot sets the Release altitude* by setting the contact Altimeter needle (RED WHITE needle) to the required release altitude. In the Dive the White altimeter needle unwinds until it brushes past the pre set Contact Altimeter needle. This contact completes an electrical circuit that initiates weapon release and activates the Automatic Dive recovery system. Automatic Dive recovery is accomplished by solenoid action. The solenoid releases the spring lock and the elevator trim is driven to a neutral position, this in turn moves the elevator to recover the aircraft from the dive. The pilot can add additional elevator input if required.
At any stage in the dive the pilot can manually release the bombs and this will also initiate the Auto dive recovery system.
The recovery is flown with the Dive brakes extended. As the nose approaches the horizon the pilot selects Dive brakes in. Elevator trim operation is now restored to normal manual function.
In general terms a more accurate pass will be made the steeper the dive Angle. This because the steeper the Dive angle the less allowance needs to be made for Bomb horizontal range. In a perfect 90 degree Angle delivery the pilot simply aims the whole aircraft at the target. Other than wind effect (and of course side slip) the weapon will impact where the nose (Reticle) is pointed… The very essence of the Stuka Dive bomb technique.