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 of a Marston round tube honeycomb radiator.
| Identifier | ExFiles\Box 78\3\ scan0074 | |
| Date | 27th March 1915 | |
| From Exp. Dept. Copies for: J.{Mr Johnson W.M.} R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} Na.{Mr Nadin} Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}3/L27315. March 27th.1915. H 496 Report on bumping test of Marston round tube honeycomb Radiator 4 1/4" thick. This radiator has ball underneath type suspension and is built up of round tubes 4 3/4" long by John Marston, Wolverhampton, under Zimmermans patent. It has already been reported on by Mr Hives as being light and efficient on the thermal test. We have run a chassis with this radiator fitted on the bumper for 30 hours over 2" alternate bumps at 105 revs. per minute without leakage occurring. This shows this type of radiator to be as strong as the Orme Evans square tube honeycomb as far as we have tested them. The first of the Orme Evans square tube radiators (not bonded) was run for 15 hours without leaking and the test was then stopped as we considered this good enough being a very big improvement over the crinkled tube type radiator, which usually leaked badly in a very few hours. The second Orme Evans square tube honeycomb (bonded) was run for 20 hours without leakage occurring and then taken off. We have now run for 30 hours with the round tube Marston which is an ample test for strength as regards standing road shocks. It is about 20 lbs lighter than the | ||