Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Design change of an accelerometer for a gun barrel from a capacity arrangement to a variable inductance system.

Identifier  ExFiles\Box 175\3\  img062
Date  9th August 1940
  
3
To Rm{William Robotham - Chief Engineer}/Mr. Hardy (Clan Foundry). Lr{Mr Ellor}/HWS.1/VR.{E. S. Voller - Orders} 9.8.40.
RE :- ACCELEROMETER FOR GUN BARREL.
With reference to the scheme discussed, namely an inertia-controlled/capacity gap, further consideration of the quantities involved has led us to believe that the capacity arrangement will be advantageously replaced by one employing a variable inductance.
It will be possible to effect a direct calibration.
Sketches for the parts for this unit are being prepared and will be issued to HPS.{Horace Percy Smith - Experimental Factory Mgr} as rapidly as possible.
Tht unit will be employed in a manner similarly to that already laid down, namely to produce a direct record of acceleration against a base of time.
Lr{Mr Ellor}/HWS.
  
  


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