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 drawing and table showing the overall dimensions of standard SU carburetters.
| Identifier | ExFiles\Box 31\4\ Scan186 | |
| Date | 30th January 1933 guessed | |
| SHEET Nº4 OVERALL DIMENSIONS OF STANDARD SU CARBURETTERS H FOR HORIZONTAL THROTTLE VIZ HV2(H)C V - VERTICAL - HV2(V)C HF{H. W. Frost - Coachwork Inspector} - HORIZONTAL FLANGE - HV2HC-(HF{H. W. Frost - Coachwork Inspector}) VF - VERTICAL - HV2HC-(VF) | CARBURETTER TYPE | BODY N° | A | B | C | D | E | F | G | H | | :------------------- | :------ | :------ | :------ | :------- | :------- | :------ | :------------- | :------- | :------- | | HV0HC-VF | 660 | 4 3/8 | 3/16 | 4 | 2 | 4 5/8 | 7/8 | 48 m/m | 9/32 | | HV0HC-HF{H. W. Frost - Coachwork Inspector} | 702 | 4 3/8 | 3/16 | 4 | 2 | 4 5/8 | 7/8 | 2 1/4" | 9/32 | | OM-H-HF{H. W. Frost - Coachwork Inspector} | 617 | 4 3/8 | 3/16 | 4 7/8 | 2 3/16 | 4 1/4 | 1" | 48 m/m | 9/32 | | HV1HR VF | 349 | 4 3/8 | 3/16 | 4 3/16 | 2 3/8 | 4 5/8 | 1" | 1 3/4" | 17/64 | | HV1HL-HF{H. W. Frost - Coachwork Inspector} | 340 | 4 3/8 | 3/16 | 4 3/4 | 2 5/16 | 4 5/8 | 1" | | | | HV1VR{E. S. Voller - Orders}-HF{H. W. Frost - Coachwork Inspector} | 348 | 4 3/8 | 3/16 | 4 3/8 | 2 5/16 | 4 5/8 | 1" | | | | HV2HC-HF{H. W. Frost - Coachwork Inspector} | 623 | 4 7/8 | 3/16 | 5 1/32 | 3 1/16 | 4 1/4 | 1 1/8 | 60 m/m | 1 5/32 | | HV2HC-HF{H. W. Frost - Coachwork Inspector} | 918 | 4 7/8 | 3/16 | 4 11/16 | 2 1/2 | 4 5/8 | 1 1/8 | 55 m/m | 1 1/32 | | HV2HC-VF | 917 | 4 7/8 | 3/16 | 4 7/8 | 2 1/2 | 4 7/8 | 1 1/8 | 55 m/m | 1 1/32 | | HV3MC-HF{H. W. Frost - Coachwork Inspector} | 735 | 5 | 3/4 | 5 3/4 | 2 1/2 | 5 | 1 1/4 | 65 m/m | 1 3/32 | | HV3MC-HF{H. W. Frost - Coachwork Inspector} | 690 | 5 | 3/4 | 5 7/16 | 3 | 5 | 1 1/4 | 60 m/m | 1 3/32 | | HV3MC-HF{H. W. Frost - Coachwork Inspector} | 744 | 5 | 3/4 | 5 7/16 | 3 | 5 | 1 1/4 | 65 m/m | 1 3/32 | | HV4MC-HF{H. W. Frost - Coachwork Inspector} | 485 | 5 1/4 | 3/4 | 5 3/4 | 3 | 5 3/16 | 1 3/8 | 65 m/m | 1 3/32 | | HV4MC-HF{H. W. Frost - Coachwork Inspector} | 471 | 5 1/4 | 3/4 | 5 3/8 | 3 | 5 3/16 | 1 3/8 | 65 m/m | 1 3/32 | | HV5HR-VF | 991 | 5 3/4 | 3 3/8 | 5 7/16 | 3 1/4 | 5 1/2 | 1 5/8 | 72 m/m | 1 3/32 | | HV5HL-VF | 992 | 5 3/4 | 3 3/8 | 5 7/16 | 3 1/4 | 5 1/2 | 1 5/8 | 72 m/m | 1 3/32 | | HV5HR-HF{H. W. Frost - Coachwork Inspector} | 478 | 5 3/4 | 3 3/8 | 5 7/16 | 3 1/4 | 5 1/2 | 1 5/8 | 72 m/m | 1 3/32 | | SQUARE HV6MC-FLANGE | 739 | 5 3/4 | 3 3/8 | 5 1/4 | 3 1/8 | 5 1/2 | 1 5/8" SQUARE | 61 m/m ::| 1 1/32 | | SQUARE HV8MC-FLANGE | 592 | 6 1/4 | 4 | 5 7/8 | 3 3/4 | 6 3/8 | 48 m/m SQUARE | 61 m/m ::| 1 1/32 | | ROUND HV12MC FLANGE | 1120 | 7 1/8 | 4 1/2 | 7 3/16 | 3 1/2 | 6 5/8 | 2 1/2 | | | | ||