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).
Experiment investigating the contact resistance of tungsten rods.
| Identifier | ExFiles\Box 35\5\ scan 134 | |
| Date | 24th January 1919 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 88210 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Contact Resistance of Tungsten (Cont'd) Order No. Customer's No. 2 Re: each rod was wound with copper wire, and the ground faces placed to-gether (Fig 2) This time, only 9 amps flowed. When the unfaced ends, or the sides of the rods, were placed in contact, the full 10 amps flowed. If in the second case with faces in contact, the rods were tilted slightly (Fig 3), the current rose from (Cont'd) Signed This Sheet must be filed on completion of the work. | ||