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).
Visit to Morris Radiators Ltd. to discuss the manufacture and performance of a Bentley V radiator.
| Identifier | ExFiles\Box 150\2\ scan0332 | |
| Date | 13th March 1940 | |
| - 4 - Continued:- 4. MORRIS RADIATORS LTD. This visit was paid to discuss the manufacture of a Bentley V inner unit by Morris's in their fin and tube type of block. Mr. Hull, Assistant Work's Manager; Mr. Robinson, Chief Designer; and Mr. Goddard, Development Engineer, were interviewed. The type and size of matrix to be employed were discussed with Mr. Goddard and he produced comparative curves showing performance of a fin and tube block with 8 gills per inch and 9 gills per inch on a 1¾" depth of matrix, and the Marston mark 6 matrix. Results indicated that the fin and tube block with 8 gills per inch was approximately 10% better than the Marston block up to 30 m.p.h. beyond which the figures appeared comparable. A standard test was adopted to obtain these figures consisting of blowing free air through, at a temperature of 80°F.{Mr Friese} at a radiator block 18" by 13" by 1¾" deep. The coolant circulation through the block was at an average temperature of 180°F.{Mr Friese} with a flow of 15 gallons per minute; air speeds varied from nothing to 60 m.p.h. Weight comparison of the blocks showed the fin and tube with 8 gills per inch to save 1½ lbs. compared with a Marston block. In addition the water capacity was reduced from 2 pints for the mark 6 to 1.28 pints. When making up this radiator it was requested that if possible the strapping should be deleted and the radiator fixed direct into the yoke by means of the side plates. This, however, presented some difficulties owing to the construction of a fin and tube block, and it was left to Morris's to decide for themselves what was the most practical design would be. A comparison was also carried out between the Marston block and the Morris film block. Figures showed with 2" depth that Morris's block was approximately 7½% more efficient than the corresponding Marston's block right up the speed range, and was also some 2½ lbs. lighter. - continued - | ||