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).
Log sheet of endurance and leak tests for various radiator designs and suspension methods.
| Identifier | ExFiles\Box 119\2\ scan0068 | |
| Date | 8th August 1910 | |
| SC 1831. Marston Zimmerman Radiator 20" x 4 3/4" Test: 20 hrs on 3" bumps. Result: Small week appeared to 2 1/2" from bottom & 1/2" from off side after 4 hrs. easily removed by soldering - After being run 20 hrs - nothing further happened. Radiator with rough experimental method of support. Test: 20 hrs on 2" alternate bumps @ 100. Result: After running 14 hrs 10 mins a leak appeared 1 3/4" from off side & 3/4" from bottom & a second 2 1/4" from near side & 1/8" from bottom @ 20 hrs another appeared 1/2" from near side & 1/8" from bottom. 20" crinkled tube Radiator with ball well underneath radiator. Test: 2 hrs 30 mins. on 2" alternate bumps @ 100. Result: Leaked in several places near both bottom corners. after running above time. 20" crinkled tube Radiator having side plates rigidly fixed to both top & bottom tanks. Test: 5 hrs. on 2" alternate bumps @ 100 revs. Result: Two leaks occurred (1) 5 1/2" from bottom & 3/4" from near side & (2) 1/2" from bottom & 3 1/2" from near side. 20"x5" Orme Evans square tube honeycomb radiator (Cubes folded from sheet metal) both ball underneath suspension. Test: 31 hrs 25 mins on 2" alternate bumps @ 100 revs. Result: no leaks appeared through bumping but after standing all night a small week appeared in the morning. German Radiator fitted with old style suspension. Test: 20 hrs on 2" bumps. Result: No leaks appeared. Honeycomb Radiator made by Motor Radiator Manufac[turing] Co. wt. 16lbs empty with 3 1/4 galls of water. Test: 20 hrs on 2" bumps. Result: No leaks. | ||