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).
Calculations for heat dissipation and critical temperature, comparing Mark VI and Mark V components.
| Identifier | ExFiles\Box 149a\2\ scan0264 | |
| Date | 6th November 1935 | |
| (APPENDIX - SHEET 3a) Hs{Lord Ernest Hives - Chair}/Std.14/KW.6.11.35. Using Mark VI 84 m.m. matrix and taking ratio of Mark VI dissipation / Mark V dissipation = 1.15 (15% represents mean gain with Marston's latest Mark VI against Mark V). Dissipation (for 2 sq.ft.) = 62.2 x 1.15 = 71.5 B.T.U's/min/°C. temp.diff. as before H / Δt = (602 x 71.5) / (144 x 2) = 149.4 Δt = H / 149.4 = 8100 / 149.4 = 54.3 Critical Temp. = 100 - 54.3 = 45.7°C. | ||