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).
Comparison table of specifications for Peregrine and Borg & Beck clutches.
| Identifier | ExFiles\Box 1\5\ B001_X 111-114-page32 | |
| Date | 7th January 1933 | |
| -3- Hs{Lord Ernest Hives - Chair}/Aln.1/MA.7.1.33. Cont'd.{John DeLooze - Company Secretary} Peregrine Standard Borg & Beck B & B type Peregrine 10.A-1-G.{Mr Griffiths - Chief Accountant / Mr Gnapp} N.sch.3513 C.100500 Fabric area per surface (sq.ins.) 31.0 22.9 45.2 Loading (lbs.per sq.in.) 28.4 44.5 30.8 Clutch travel (ins.) 0.1 0.1 .0825 Finger leverage 4.75:1 3.77:1 5.3:1 Thrust bearing load (lbs.) 212 312 288 Hs{Lord Ernest Hives - Chair}/Aln. | ||