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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).
The side lever mechanism for the epicyclic 3rd speed gearbox.

Identifier  ExFiles\Box 15\5\  Scan187
Date  14th February 1931
  
BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design}
X7310
DA{Bernard Day - Chassis Design}3/M14.2.31.
C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager}
C. to HS.{Lord Ernest Hives - Chair} HY.{Tom Haldenby - Plant Engineer}
SIDE LEVERS - EPICYCLIC
3rd. SPEED GEARBOX.

We send herewith N. schemes 3220/1., shewing the
side lever mechanism for use with the epicyclic 3rd. speed gearbox
for P. 2.
The levers and all the parts are as far as possible
P. 2. pieces.
We have shewn a reverse stop using the existing gear lever
but we realise such a stop may be found unnecessary, in which
case the gear lever can be a plain lever.
A scheme for excluding the hot and cold air is illustrated
and we would be glad if Derby would illustrate this scheme on the
present P. 2. subframe print for use on present cars, as Sales
are demanding this. The rubber and its pot should be supplied
by RR.
On N. scn. 3220. we shew the present seating positions
with the exception of the revised 'U' type, and the lever positions.
It will be seen that there are only two angular settings and two
lever lengths.

DA.{Bernard Day - Chassis Design}
  
  


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