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Apollo CM Block II Earth Landing Sequence Controller (ELSC)

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:800.00 - 1,200.00 USD
Apollo CM Block II Earth Landing Sequence Controller (ELSC)

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Auction Date:2016 Apr 21 @ 18:00 (UTC-05:00 : EST/CDT)
Location:236 Commercial St., Suite 100, Boston, Massachusetts, 02109, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Apollo Command Module Block II Earth Landing Sequence Controller, measuring 7 x 4.5 x 3, bearing a large parts tag affixed to the top, reading: “Item Name: Sequence Controller, NAA Control No. ME 901-0001-0038, Contract No. NAS 9-150, NAA Inspection Serial No. 09390AAF0249, Manufacturer: Northrop Ventura, Mfr Serial No. 70, Mfr Part No. R8204-501.” The unit has four connector ports labeled “J1” through “J4,” and a blue “Static Air” port. In fine condition. Part of the Apollo Command Module's sequential events control system, the controller was employed during spacecraft reentry to sense barometric pressure, and automatically trigger firing pyrotechnics that released the Apex cover, drogue, pilot and main parachutes prior to splashdown.