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 development and testing of different condenser configurations for the Goshawk ignition system.
| Identifier | ExFiles\Box 52\3\ Scan018 | |
| Date | 24th November 1921 | |
| X. 4423 [Struck through] 30 24.11.21. X.4423 - CONDENSERS FOR GOSHAWK IGNITION. The first Goshawk condenser successfully made up in the Experimental Dept. was to original detailed drawings and gave a capacity of .11 mf. Owing to the necessity for a condenser of suitable capacity for the chassis engine, this was increased in depth and made up in a form suitable for fitting to the outside of the distributor case, with a capacity of .23 mf. This condenser was made up with .002" mica and .001" foil, as instructed by the details, and has now been removed from the chassis engine distributor and replaced by one made up with .00075" tin foil and .0015" mica, without bolt holes, but of depth capable of allowing this to go inside the case with a thinner packing piece than detailed. This has a capacity of .18 mf. Another condenser of the larger depth has been made up with bolt holes for the test bed engine with a capacity of about .24 mf. The next condenser to be made up has .0005" tin foil and .0015" mica, with no bolt holes and thinner packing piece, and a capacity of .33 mf.has been secured in this instance inside the box. All the above condensers have stood the 450 volt R.M.S. & C. test. R. {Sir Henry Royce} R. {Sir Henry Royce} Ltd. (702) (File 2) 2000 10-21-O&S Ltd. (891) RBC | ||