SOS COD was probably "Clarke's Omnibus Design" but may have been "Clarke's Own Design".
Model | SOS COD | |||
Details |
Single deck with front entrance 34 seats |
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Total Number | Introduced | Notes | ||
1 | 1930 | 6-cylinder petrol engine with Carlyle bodywork 1930: reclassified MM 6-cylinder |
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22 | 1930 | 4-cylinder petrol engine with Brush bodywork 1931: reclassified IM4 with new Short Bros bodywork |
SOS RR stood for "Rolls Royce". The bodies from the unsuccessful XL class were fitted to these chassis and the original XL registration numbers were allocated to them. BRR stood for "Bus Rolls Royce", being dual purpose vehicles. SRR indicated Sort Bros bodywork. LRR indicated a Low chassis.  OLR indicated an open-top design and SLR indicated a low-chassis with saloon bodywork.
Model | SOS RR | |||
Details |
Coach with Brush bodywork 30 seats § Dual purpose bus/coach with Carlyle bodywork and 34 seats §§ Open coach with normal control, Short Bros bodywork and 29 seats |
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Total Number | Introduced | Notes | ||
42 | 1930 | |||
6 | 1930 | Brush or Carlyle bodywork | ||
21 | 1930 | BRR§ | ||
2 | 1930 | SRR with Short Bros bodywork | ||
30 | 1933 | LRR with low chassis and Short Bros bodywork | ||
25 | 1935 | OLR§§ were the last BMMO normal control vehicles | ||
50 | 1937 | SLR with English Electric bodywork |
SOS IM stood for "Improved Madam".
Model | SOS IM4 and IM6 | |||
Details |
Single deck with front entrance Petrol engine 4-cylinder (IM4) and 6-cylinder (IM6) 34 seats |
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Total Number | Introduced | Notes | ||
38 | 1930 | IM4 with Carlyle or Short Bros bodywork | ||
107 | 1931 | IM4 with Short Bros bodywork | ||
52 | 1932 | IM4 with Brush or MCCW bodywork | ||
22 | 1931 | IM6 with Brush bodywork | ||
38 | 1933 | IM6 with Short Bros bodywork |
SOS REDD stood for "Rear Entrance Double Decker".
Model | SOS REDD | |||
Details |
Double deck with rear platform and Short, Eastern Counties, Brush or MCCW bodyworkUpper saloon: 26 seats Lower saloon: 26 seats § Upper saloon: 22 seats Lower saloon: 26 seats |
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Total Number | Introduced | Notes | ||
1 | 1931 | § Short Bros bodywork | ||
50 | 1932 |
SOS FEDD stood for "Front Entrance Double Decker". It was introduced to reflect the company policy of front entrances for their single deckers. There is some doubt about the total number. Reference [1] of the Midland Red buses index page indicates that the total number of FEDD chassis was 336, but the fleet list indicates 337, including FHA200, although there is a question mark against its fleet number. There were 337 bodies produced, including one by English Electric, which replaced one of the Short Bros bodies. However, it is not clear whether another chassis was re-bodied. It is possible that the original Carlyle body was replaced by a Short body.
Model | SOS FEDD | |||
Details |
Double deck with Carlyle bodywork, front entrance and sliding doorUpper saloon: 30 seats Lower saloon: 26 seats § Upper saloon: 26 seats Lower saloon: 26 seats§§ Sliding door replaced by single jack-knife door |
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Total Number | Introduced | Notes | ||
1 | 1933 | § Carlyle bodywork | ||
50 | 1934 | Short Bros bodywork | ||
135 | 1936 | MCCW bodywork | ||
150 | 1938 | §§ Brush bodywork |
SOS ON stood for "Onward". DON was the diesel version with an AEC engine. CON was converted with a BMMO K-type diesel engine. SON was the "Saloon Onward", also with the BMMO diesel engine, with the exception of the first SON, which retained the petrol engine.
Model | SOS ON | |||
Details |
Single deck with front entrance SOS 6-cylinder Petrol Engine 38 seats § AEC 7.7 Litre 6-cylinder oil engine 36 seats §§ BMMO K-type oil engine |
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Total Number | Introduced | Notes | ||
33 | 1934 | SOS ON with Short Bros bodywork | ||
42 | 1934 | § SOS DON with Short Bros bodywork | ||
50 | 1934 | §§ SOS CON with Short Bros bodywork | ||
10 | 1935 | § SOS DON with Brush bodywork | ||
1 | 1935 | SOS SON with Short Bros bodywork | ||
215 | 1936 | §§ SOS SON with English Electric bodywork | ||
88 | 1939 | §§ SOS SON with Brush bodywork |
SOS REC stood for "Rear Engine Coach". All four were converted during the war to prototypes for the post-war BMMO S Series single-deckers with under-floor side engine, front entrance and 40 seats.
Model | SOS REC | |||
Details |
Coach with Carlyle bodywork Rear petrol engine 32 seats Prototypes S1 to S4 with front entrance Under-floor side-mounted BMMO K-type 8.028 Litre diesel engine 40 seats |
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Total Number | Introduced | Notes | ||
4 | 1936 | Converted in 1941 (S1), 1942 (S2), 1943 (S3) and 1944 (S4) |