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Me 262 would probably have proved a very effective night fighter along with the Do 335
I have my doubts.
Me-262 was a small aircraft (I've seen one at USAF museum). There's no internal space for additional fuel and electronic equipment which were essential for successful late WWII night fighter aircraft.
Do-335 would be better as it has decent endurance. However it also lacks internal space for electronic equipment.
Extremely high speed aircraft such as the 262 and Do335 are not going to be at much of an additional advantage. , As the bombers of the time tended to cruise at approx. 200 - 220 mph (even the B29 cruised at 220 mph), a major problem for night fighters was overshooting the target so a max speed of 500 mph is likely to add little to your chances over an aircraft such as the Ju88 which went 320 mph.
If I remember right most of Welter's Mosquito kills were day intercepts as the Me 262 was more or less the only type able to catch the damn recon birds at higher alt.
In a target rich environment such as existed later in the war, no need to loiter.Not range. Loiter time.
Not range. Loiter time.