Impressive Lunar Module variant ORDEAL (Orbital Rate Display Earth and Lunar) mockup box. The unit measures 9 x 4 x 4.5 and has a Kearfott label affixed to the reverse which reads, “Orbital Rate Drive Electronics NASA-MSC…Ser. 000…Stock No. Mock–up.” Box is still attached to two mounting brackets. Front of the box has six toggle switches, including one for each of the two onboard Flight Direction Attitude Indicators (FDAI), one for Earth/Lunar selector switch, as well as an “Alt Set” adjustable dial (the ‘Push to Turn’ switch is missing). In fine condition. Designed after input from Gemini astronauts, the ORDEAL box would be installed along the wall of the Lunar Module and coupled to the FDAI to automatically rotate around the pitch axis at the same rate of the orbital period by means of a fixed reference attitude on the FDAI. Considered the standard control system used while orbiting around the Earth or moon, any variation of the ORDEAL box is of the utmost desirability.
Terms and abbreviations used in our descriptions.