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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, modification, and procurement of hypoid rear axle gears.

Identifier  ExFiles\Box 136\5\  scan0146
Date  25th June 1927
  
To BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design}
c. to BJ. Hs.{Lord Ernest Hives - Chair}

(2066

DAL/M25.6.27.

HYPOID REAR AXLE GEARS. X.2066
X.7350

We have discussed again the question of hypoid
rear axle gears, and R.{Sir Henry Royce} wishes us to proceed immediately to
order one with 1" offset. He thinks however that the crown
wheel shewn on N.sch.2399 is rather think, and we [strikethrough] we have made
N.sch.2398 [strikethrough] 2427 which we send herewith, shewing the slight
modifications necessary to reduce the thickness of the crown
wheel.

As shewn on N.sch.2399 the differential box
was the same as that for the 2" offset: on N.sch.2428 it has
been necessary to slightly alter the differential box.

We have also had to move the pinion tail bearing
away from the centreline of the crown gear slightly in order to
give clearance for the differential, but with the exception
of this alteration the axle casing is the same as on N.sch.2399.

Would you please hand a drg. of the hypoid gears
to OY. as soon as possible, so that he can take it personally
to the Gleason Co.

With reference to the 2" offset gears R.{Sir Henry Royce} has
explained he did not intend to stop them, and as we believe you
have the fittings for them, and the gears themselves are on the
point of delivery, no doubt we shall be in order in proceeding
with that experiment, on say EAC.7. chassis in order to learn
something about hypoid gears. It is the intention however to
seriously only on those with the 1" offset.

DA.{Bernard Day - Chassis Design}
  
  


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