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 bumping test results for a Marston Zimmerman Radiator.
| Identifier | ExFiles\Box 78\3\ scan0080 | |
| Date | 1st May 1915 | |
| From Exp. Dept. Copies for: J.{Mr Johnson W.M.} H.{Arthur M. Hanbury - Head Complaints} E.{Mr Elliott - Chief Engineer} Na.{Mr Nadin} Report on bumping test of 20" X 4½" Marston Zimmerman Radiator. This radiator which has previously been bumped on 2" bumps for 30 hours without leaking, has now been tested on 3" bumps as requested by Mr Royce. After running on the 3" bumps for 4 hours a small weep appeared on the front face 2½" from the bottom and 9½" from the off side. It can easily be repaired by soldering. We ran for a total time of 20 hours on the 3" bumps and no more leaks were made. This radiator has made very good performance by running 30 hours on 2" bumps and 20 hours on 3" bumps with only one tiny leak. Hy.{Tom Haldenby - Plant Engineer} | ||