curious why are you posing a what if with the Do 335 in this thread as well as nf ? the way of the jet was at hand, all prop jobs except the Ta 152H were to be replaced during summer of 45 for Tagdjagd. the 262 single seat had proven itself, other gruppen would have followed for nf duties, the Do 335 was not even considered seriously in the nf role. I'm doing a book co-authoring on the NF Reich defence duties, data collected for over 35 years so there will be much included as to why I consider my statements as truth
You are correct in that this thread the question is about which aircraft is the best bomber killer. Taking into account the superb performance of the 335 and the asumtion that it could be additionally armed with 2 gondolas and R4M's it well could have been the best in this role. Adding the chance that it could also have been used as a NF. I am not aware that the 335 had any major engine difficulties such as any German jet.
I do not believe that the German jets would have achieved a reliable performance at any time due to the existing material shortage of alloys. No matter if summer or winter 45.
In contra I would strongly believe that this advanced technology was only exploitable by the US as it proofed after the war due to its seemingly endless resources and $$. As for Germany it proofed to be a fatal choice and instead of developing and pressing a new generation of affordable and technically developed props such as the USA in the form of a P51/P47 or F4U the limited resources in regards to material/scientists was diverted into "mystic" wunderwaffen believes.
The only new props available in 44 that could have been pushed faster into service were the 152 or D11-14 or the 335 but due to to the above mentioned reasons they were neglegted in favour of "mystic" a/c and weapons.
That the 335 was not ment to serve as a NF in 45 is certainly correct, therfore I am meerly forwarding the idea that it could have served in its role as a bomber killer just as well during night and day.
As for two of my uncles (one is a real uncle) and two of their Fliegerkameraden (3 survived the war) all were piloting from 39-45, none of them supported the jets as an alternative to the overall prop solution. If one of them would have flown a 262 it would not have changed their mind in regards to a "future" alternative but a presently needed realistic support in means of advanced props in 44/45
None of them believed in 44 that the war could be won (especially not by Wunderwaffen) but they desperatly eyed and waited for support by advanced props in order to stop the Bombers and not a 262 or other jets that were to unreliable to ensure that support.
Offcourse I do admit that a "working" and "reliable" 262 must have been the solution to any desperate Luftwaffe Pilot in 45, but unfortunatly they were not working reliable. In contra a 109K, D-12 or D-9 or 335 was.
Regards
Kruska
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