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 results of frame fracture tests conducted on a dynamometer.
| Identifier | ExFiles\Box 119\2\ scan0002 | |
| Date | 11th September 1913 | |
| X.1331. Wor{Arthur Wormald - General Works Manager}/EH5/L11913. C O P Y. September, 11th 1913. Mr. Johnson. Mr. Royce. Re Frame Tests. ------------- X.193. X.1331. ------------- We have reproduced the frame fracture exactly on the car that has been bumped on the dynamometer. I am sending the broken horn to Mr. Royce. It only lasted another 50 minutes from yester- day's report, that makes the total time 395 minutes actual bumping or 80,000 bumps. I was very surprised how quickly the frame collapsed, 20 minutes before we had examined it and could see no sign of a crank. I consider we should immediately test to see that we are doing the best thing by strengthening the front cross member, on this car it had the old type cross member, after running 175 minutes it cracked. It ran cracked for 170 minutes, nothing happened to the frame. We put a stiffer cross member in and the frame broke after 50 minutes. Now that we know how to reproduce the fracture we should be able to make headway with these test suggested by Mr. Royce to make this part of the frame stronger. I think a great effort should be made to get the proper bump- ing rig working, this test has proved its worth. The fixing for the bearings will need to ber very substancial, these on the dynamometer are continually working loose. | ||