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).
Letter to C.A. Vandervell & Co. regarding the supply of parts and drawings for a Goshawk II starter motor.
| Identifier | ExFiles\Box 51\5\ Scan144 | |
| Date | 10th May 1921 | |
| X.4342,V COPY FOR EFC {E. Fowler Clarke - Electrical Engineer} RECEIVED STAMP: Hs. {Lord Ernest Hives - Chair} MAY 11 Reference - DA {Bernard Day - Chassis Design} /THR2/DB {Donald Bastow - Suspensions} 10-5-21. May 10th, 1921. Messrs C.A. Vandervell & Co., Ltd. Acton. LONDON.W.3. Dear Sirs, X 4342 V Re Starter Motor for Goshawk II. --------------------------------- Replying to your letter of the 20th ultimo, reference EL/DM {D. Munro} , we have gone further into this matter and have decided that it will be best if we supply the finished shaft and bearing bracket, also the small parts which complete the motor, including six no.2BA studs, nuts, and washers, which secure the bearing bracket to the motor casing, also the ball bearing and nut, distance bush and dust cover. You will see by our referring to six studs that we do not agree to the method of fixing shewn on your drawing, as the motor is not supported in any other way, and therefore the driving torque is taken by these studs as well as the weight of motor frame etc., To this end we enclose drawing D.50002 - Brg Bracket and "N" Scheme 838, to which we have added a detail section of the tapping required for the securing studs, which are of the "fitted" type. You will notice on Drawing D.50002 several dimensions marked with an asterisk, which we desire you to fill in to suit yourselves, it being possible that your standard motor casing has not a large enough section to take our 2BA securing studs, in which case the outside diameter will have to be increased to accomodate these studs. Provided this diameter is not more than 4 1/2" this will be quite O.K. as far as we are concerned. We think, also, that the bearing at commutator end of shaft should be a ball bearing to match the other two we are fitting, and should be glad to have your remarks on this point. Contd... | ||