dsc46591.jpg

Detail of the side of the fuel cell which has the electrical (left) and plumbing (right) connections.

From top to bottom, the electrical connectors at left are

• Power
• Heater connection
• Controls
• Instrumentation

From top to bottom, the plumbing connectors at right are

• Glycol from radiator
• Glycol to radiator
• Hydrogen vent
• Nitrogen fill
• Water out
• Oxygen vent
• Oxygen supply
• Hydrogen supply

The fuel cell was manufactured by Pratt & Whitney.

On the electrical connector panel is a "Pratt & Whitney Aircraft - Dependable Engines" medallion. Pratt & Whitney manufactured the (very large) "Wasp" aircraft engine product line. Engines in this product line powered such WWII aircraft as the B-24, the P-47, and the Corsair and such Cold War aircraft as the C-97 Stratofreighter, the KC-97 Stratotanker, the B-50 Superfortress, and the B-36 Peacemaker. The Wasp Major R-4360, which powered these Cold War aircraft, was also the engine used on the original Pregnant Guppy (used to ferry Apollo/Saturn hardware around the country).

Pratt & Whitney later went on to manufacture the RL-10 rocket engine which powered the Saturn S-IV stage, the proposed S-V stage, and the Centaur stage; the latter had its first successful flight on November 26, 1963, and Centaur stages are still flying today.

The ID plate under the medallion reads

Power Supply
Electrical Fuel Cell

Pratt & Whitney Aircraft - Division of United Aircraft Corporation
East Hartford Conn, U.S.A

NAA/S & ID SCD No.	ME464-0007-1002
Contract No	NAS 9-150
Stock No.	[blank]
MFR Part No.	606100
MFR Serial No.	06763P650784

Property U.S.

The bottom ID plate reads

Manufactured under one or more of the following patents: 2,716,670   2,928,783   2,969,315

Other Patents Pending