First, I would like to thank you for your detailed reply and the effort it took to look into this. I have "Defiant, Blenheim and Havoc Aces" and while an interesting read , it is not the easiest book to get the results we are looking for from. I am not saying anything about the accuracy, just that the Author will bring a pilot in and out of the narrative and not refresh our memories as to what type of plane he was flying (or sometimes what squadron he was flying with at the time). When dealing with a book on one type of aircraft that may be perfectly fine. When dealing with 3 aircraft not so much. So thanks again for going through this.
The problem with the Defiant (for me anyway) is that it served for a long time. From Dec 1939 to July of 1942 in combat squadrons although for many of those months it was just one or two squadrons. That in itself it not an issue as many other aircraft had slow introductions and/or slow fade-outs from service.
The problem/s start to come with statements like "For two thirds of its front line career it was the most successful RAF night fighter, bringing down more German bombers over Britain between August 1940 and August 1942 than any other type"
Now even if we shorten it's career to Aug 1940 to Aug 1942 that is 24 months and 2/3rds of that is 16 months.
The Peak activity of the German night bombing was from Sept 1940 to May of 1941, about 8 months. During those 8 months the Defiants were not equipped with radar. They may have, in some months made up a fair number of the night fighter forces, I haven't crossed checked many references, but one says eight squadrons by May of 1941, By way of Wiki " aviation author John Taylor noted that during the
Blitz on London of 1940–41, the four Defiant-equipped squadrons were responsible for shooting down more enemy aircraft than any other type in the theatre." Which rather leaves four squadrons of Defiants out of it? Or they were only formed up at the very end of the Blitz? And whether there were 14 squadons or 16 total that flew the Defiant at night in it's career is rather imaterial to the fact that many of those squadrons (at least 6?) didn't fly them until the major German effort was over and German activity was so low that many of the night fighters (even with better radar) weren't getting much in the way of intercepts.
According to one book (Night Fighters) by Bill Gunston the British night fighters claimed 96 German aircraft destroyed (?) in the first two week of May which is asmany (or more) than for the entire period of Sept to the end of April (and April was 48 claimed destroyed). He does not break it down by type and he could obviously be in error. Or Defiants could have shot down a large percentage of that 96 and held on to the claim of shooting down more in theater than any other type.
We also run into the problem of what a particular author considers the "Blitz" in regards to time period to be counted. I am sure to some people on the ground the
Blitz ended when the last bomb fell. To some people it ended when the Bulk of the Luftwaffe headed for Russia in the last 1/2 of May 1941. To others it was somewhere in between.
Wike does not help with statements like " In September 1941, 264 Squadron became the first to receive the Defiant Mk II, bringing them into operational use by mid-September. The principal uses of the Mk II night fighter were 96, 151, and 262 Squadrons.
[34] As the radar-equipped Defiants began filtering through to operational squadrons, the
Luftwaffe's bombing campaign petered out as German forces had become heavily engaged on the
Eastern Front as they embarked upon the
invasion of the Soviet Union.
[34]"
The Luftwaffe's bombing campaign over Britain was petering out in the last 2 weeks of May and June let alone Sept/Oct/Nov of 1941. If anything the German forces left in the west
might have become more active in the fall of 1941 than in the summer due to the increasing length of the nights compared to the summer?
As far as the Beaufighter IIF goes, the first production aircraft didn't fly until March 22nd 1941 and it equipped only four squadrons by the end of 1941. So whatever it's handling problems may have been, they didn't affect it's operational performance during the "Blitz" which ended (?) in May of 1941. First Squadron to use the Beuafighter IIF was Nos 406 squadron in June 1941.
For the winter of 1940 and the Spring of 1941 it was the Beaufighter I.
Trying to filter though all the claims (not aircraft victory claims, they are a subject all their own) ) made about some of the aircraft involved is difficult because some of the timelines don't seem to line up.
And some of the pilots reports/accounts are a bit discouraging. Flg Off Stuart of No 264 squadron is supposed to have scored the only victory by No 264 squadron while using a radar equipped Defiant which was done on April 18th 1942. This was supposed to be No 264's 97th victory and the 15th at night.
Defiant aces can also be confusing as Flg Off Michael Young shows, 7 kills and 6 shared he scored a kill on an intruder mission on May 9th 1941 but it was his only night victory.
And we comments like "
In September 1941 (125)
the squadron moved to RAF Fairwood Common and became fully operational, with the Defiant proving to be a more than effective night fighter. By March 1942, 125 Squadron started converting to the twin-engined Beaufighter."
Now when going through "Defiant, Blenheim and Havoc Aces" you can find several references to No 125 squadron but no mention of either a kill or claim by the squadron during the time it had Defiants. With no kills (or indeed no mention of even an unsuccessful intercept) how does that turn into the Defiant being a more than effective night fighter?
Not kills/claims recorded in that "Aces" book or the author of the Wiki article embellishing things or?????
The Length of service is a problem in that one can take selective slices out of the length of service and make a claim that might be statistically true for for that slice of time but if you extend that "slice" a few month it is no longer true. The Defiant did give good service in getting large numbers of aircrew and ground crew up to speed in a difficult time and did so with a minimum of accidents and needless problems.