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Interior of Redstone tail unit, forward looking aft.

The smaller hole at the 12:00 position is the steam vent (which dumps the turbine's exhaust steam).

Also note the air rudder/jet vane actuators (with the bicycle-type chain) located at 90° intervals around the periphery of the far end of the tail unit.

Picture 2 of 2.

This photo was taken when the tail unit was stored in the North Campus building, laying on its side.