The developement of the He 177 started 1936, almost simultaneously with British specification P.13/36 which resulted the Avro Manchester and Handley Page Halifax. Interesting comparisons can be made between these three types:
- specification wise the He 177 was more advanced, targeting 500km/h while British demanded minimum 275mph at 15k
- also British specification included shallow (30deg) dive bombing requirement
- originally all three were supposed to be twin engined planes but Halifax specifacation was soon changed to four Merlins due to the troubles with the Vulture
- eventually four engined versions were developed by the Avro and Heinkel as well (Lancaster, He 177B/277/274)
- the prototype He 177 flew November 1939, just few months after the prototypes of the Manchester and Halifax (July and September 1939)
- both, Manchester and Halifax, entered service November 1940
- developement of the He 177 was slowed down by engine trouble and continous specification changes, entering service spring 1942
- early service of the He 177 and Manchester was ruined by engine trouble
- RAF gave up with Manchester after about 200 were built, withdrawing it from service 1942 in favor of the Lancaster
- most He 177 problems were solved at the end of 1942 but continous modifications kept the serviceable number low despite over 1000 built
- developing and manufacturing this kind of bombers tied the most resources of the manufacturers, neither Heinkel, Avro nor Handley Page got any other new designs to the large scale production during war