Apollo Lunar Descent Rocket Engine: titanium chamber & bell; TRW

Description

A 1960's original all-titanium rocket engine combustion, throat and expansion shell; as thick as a dime.       Three feet in diameter and 40'' tall.  23 lbs.
This is the design tested and flown in the Apollo Moon program from TRW in Euclid Ohio.
All these Lunar Module descent engines that were carried into space on the Saturn-V have remained there, a few others are on public display.
This LMDE was a liquid chemical rocket engine consisting of an ablative combustion chamber and nozzle throat held within a continuous titanium shell, covered with a lightweight insulated shield.... with a maximum thrust of 10,500 lbf.
Of the 28 engines delivered to NASA, 10 were tested at White Sands and 9 flew.
This engine is a very late iteration, part number '109403-6' Revision-1, upgraded during manufacture by Ryan Aeronautical, San Diego.
This rocket engine is discolored from test firing, and the one inch flanges that held the nodal-point gimbal externally are missing.
This was the only throttleable design built for manned US moon exploration.
"The lunar module descent engine probably was the biggest challenge and the most outstanding technical development of Apollo." - a current NASA website
For context, an
audio record of the throttle changes made on 20 July of 1969 (NASA):
https://www.hq.nasa.gov/alsj/a11/ap11_07a__landing_dsea.mp3
All monies received for this item go toward the Quaker Meetinghouse as a donation, and a portion may be tax deductible. Please consult your tax professional.
This rocket engine is NOT the later bolted and/or tapered chamber single thrust units used for the Delta and other space & test programs.
It's unique
(not included)
pintle injector rocket engine design is used in the 1340 orbital engines that SpaceX has launched so far.
Bezos 'Blue Moon' BE-7
LH2/LOX
lunar descent engine (tested 2019) has the same thrust of 10,000 lbf.