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).
Technical report on a visit to the Stutz factory, detailing the specifications of a new liquid-cooled engine of Conqueror design.
| Identifier | ExFiles\Box 173\1\ img177 | |
| Date | 20th January 1934 | |
| H.{Arthur M. Hanbury - Head Complaints} S. from R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} C. - 4 - vacant, is being used, they state, for the reason that test facilities are available which will not interfere with their normal work. The equipment available at the Stutz factory is quite good. There is a 200 HP dynamometer complete with clutch. However, during my visit to their offices I saw a wooden model of their new engine they are developing, which is liquid cooled of Conqueror design, specifications being: 5 5/8 bore x 6.000 stroke Capacity 1760 Cu. Inches rating 750 B H P at 2,400 R P M 1050 pounds dry weight Crank Case Crank case and cylinder construction in one piece similar to P V.{VIENNA} Reduction Gear This is an internal gear .55 or .6 (see sketch). Reason for this type of gear is to have propellor running in same direction as crank shaft to prevent propellor torque reaction. Super Charger Blowing through carburetor with drive taken from front of engine as Curtis practise, which permits of blower being dropped below crank shaft splinder Centre for improved lay out of auxiliaries. Speed of blower has not yet been decided. Have run at speeds ranging from 17,000 to 24,000 R P M Bearings Lead bronze throughout of grooveless type, having 6 oil feed holes fed from external Groove Connecting Rods Not definitely decided but will, no doubt, be articulated type. They do not wish to adopt a marine type rod, as they doubt reliability of forked rod, and @ being too high the production of marine type big end. Incidentally they were very impressed with the R R lead bearings of this type, and stated they were an excellent job, and also considered the scrap percentage was remarkably low and in line with their general production experience. Lubrication High pressure 120 pounds per [square] inch minimum to allow reduced bearing clearances. Crank Shaft Will be made in soft material and possibly balanced although unbalanced have been tried. They intend to adopt the soft crank on account of reduction in CRANKSHAFT clearances | ||