Apollo Command Module Inertial Measurement Unit (IMU) Gyroscope Assembly. A highly significant example of Apollo-era ...
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Consign your material to be auctioned alongside these items on Wednesday, July 8, 2026 in Dallas, TX. Consignment Deadline for this auction is Friday, May 8, 2026.
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Description
Apollo Command Module Inertial Measurement Unit (IMU) Gyroscope Assembly. A highly significant example of Apollo-era inertial guidance hardware, this assembly comprises a gyroscope installation within a partial Inertial Measurement Unit (IMU) structure of the type used in the Apollo Guidance and Navigation system. IMUs of this design formed the inertial reference core of the Primary Guidance, Navigation, and Control System (PGNCS), enabling spacecraft to determine orientation and motion independently of external references.Measuring an overall 16.5" tall with a 10" diameter base, the unit retains a spherical IMU structural section with characteristic lightening apertures and internal mounting architecture consistent with Apollo-era construction. Visible within the assembly is a precision gyroscope mounting interface, identifiable by its circular access plate, central bearing aperture, and associated fasteners.
The surrounding structure preserves numerous original features, including laced multi-conductor wiring harnesses, terminal distribution strips, and connector interfaces typical of period aerospace instrumentation. Particularly notable is the presence of a labeled tag reading "Z GYRO TORQ RESISTANCE," corresponding to the torque motor circuit associated with one gyro axis. This terminology reflects the closed-loop servo operation of Apollo IMUs, in which gyro outputs were continuously measured and corrected to maintain a stable inertial reference platform.
An exceptional and visually compelling example of Apollo-era navigation technology, representing a critical component of the system that enabled precise maneuvering and navigation during lunar missions. The first of which Heritage has offered. Would be an excellent addition to even the most advanced collection. Very fine.
Auction Info
2026 July 8 - 9 Space Exploration Signature® Auction #6340 (go to Auction Home page)
Bidding Begins Approx.
June
17th
Wednesday
Auction Dates
July
8th-9th
Wednesday-Thursday
Proxy Bidding Begins Approx.
46 Days
Bids + Registered Phone Bidders: N/A
Lot Tracking Activity: N/A
Page Views: 184
Auction Type
Signature®: Heritage Live®:After Internet bidding closes, live bidding will take place through www.HA.com/Live. Your secret maximum bid placed prior to the live event will compete against the live bids. To maximize your chances of winning, enter realistic secret maximum bids on our site. Many of our proxy bidders are successful at winning lots in these auctions, and usually below their secret maximum. You can also place last minute bids directly with us by e-mailing Bid@HA.com or calling 1-866-835-3243. (Important note: Due to software and Internet latency, live bids may not register in time, so enter realistic proxy bids.)
Signature® Floor Sessions
Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live now starts within 2 hours of when the auction opens for proxy bidding and continues through the live session. During the live auction event, bidding in person is encouraged, and Heritage Live includes streaming audio and often video during the event.
Signature®: Heritage Live®:After Internet bidding closes, live bidding will take place through www.HA.com/Live. Your secret maximum bid placed prior to the live event will compete against the live bids. To maximize your chances of winning, enter realistic secret maximum bids on our site. Many of our proxy bidders are successful at winning lots in these auctions, and usually below their secret maximum. You can also place last minute bids directly with us by e-mailing Bid@HA.com or calling 1-866-835-3243. (Important note: Due to software and Internet latency, live bids may not register in time, so enter realistic proxy bids.)
Signature® Floor Sessions
Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live now starts within 2 hours of when the auction opens for proxy bidding and continues through the live session. During the live auction event, bidding in person is encouraged, and Heritage Live includes streaming audio and often video during the event.
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