looking at data from a variety of websites, there were three main versions of the G3M.
The G3M1 had 910hp engines and a top speed of 225mph
The most produced G3M2 was introduced in 1937 and was the type most involved in the August 1937 raids that led to the conflict with Hawk III that is the subject of this discussion.
This version had 1061hp engines and a top speed of 233mph.
The G3M3 mentioned by Corsning was introduced in 1941 when the type was largely obsolete.
It had 1300hp engines and a speed of 258mph.
I had always assumed that the maximum speeds quoted for bombers were clean with no bombload, making the operational performance of all significantly less, particularly if they do not have a bomb bay as the Nell did not.
Is there an established regime for this sort of testing?
In the video the Nell's are presumably undertaking a long distance raid so full of fuel for the return, they extend their retractible turrets on sighting the Hawks and they are visibly carrying external bombs so their speed would have been far below the quoted maximum of 233mph.
Edited by Rick65, 06 September 2017 - 09:47 AM.