posted 04-12-2021 05:12 PM               

With me that day was a set of four blueprints. The engineer was obviously knowledgeable, and had worked for NASA for many years. So I asked him what the blueprints represented.

The engineer/gentleman stated these were blueprints of LM-5's joystick electrical circuits, which converted joystick commands to the appropriate firing of each the 16 thrusters on Eagle. Essentially a translation circuit.

Should the engineer be correct, these blueprints are of considerable historical significance, particularly since Neil Armstrong essentially flew Eagle on the moon to a safe landing site using the joystick.

I'm hopeful that collectSPACE members can weigh in on the engineer's opinion. The scan below is a closeup of the title area on one of the four sheets. For whatever reason I can't upload a cropped version that eliminates the shadows and such, but this should give everyone a good idea of the blueprints and their condition. Immediately below the title area of the upper sheet is a second sheet in the frame, below it, overlapped.

They all have the same titling on each sheet, but show various parts of electrical circuits.

Thank you in advance for all your help!

posted 04-13-2021 06:27 AM               

The engineer may have referenced Apollo 11 Eagle because of the "LEM 5" in the title. The LM on Apollo 11 was LM 5. However, this appears to read "LEM" "5-AXIS MODING". I have no idea if 5-axis moding is a feature of the AGC.

Apollo AGC schematics are rare, so that in itself makes these unusual.