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But in as escort role, you have burned off most of that fuel so the weight difference in minimal.
Weight is not everything, the Mustang was much heavier than the Spit, which was itself heavier than the 109. In fact the Mustang and 190 were very similar in weights. Yet despite all that weight the Mustang could hold its own in turning contests with both.
and the power to weight ratio ( or more accurately the thrust to drag ratio at the speed and angle of attack being used in the turn). Trying to compare different aircraft to predict what happens to one aircraft when you change the weight introduces a bunch of variables.at the angle of attack being used in the turn
By that logic the supreme fighter was the 109, followed by the Spit and the 190 and Mustang following up as also runs. The P-47 being completely useless.
There is some bit Post hoc ergo propter hoc arguments going on here. Along the lines if: "well they didn't do it because they couldn't do it with Spits. Only the P-47s and P-51s had the magical qualities necessary for MR, LR and VLR escort roles", all the extra fuel and so on had no affect on them whatsoever".
I've just been reading excellent "The Bombing War' by Richard Overy. he makes the point that the RAF simply did not do "counter force" (a more encompassing description than just escorting). It was not part of their dogma, either night or day. What little they did (and despite the propaganda it was very little), was always after the fact and as a response to terrible losses, really to get the politicians off their back and try and preserve some of morale with the crews, as much as anything else.
So these things were not technical in nature, they were deliberate choices that were made. For the RAF this applies to night fighter support as well, what little they applied was pathetic, as many people (in the RAF itself) said at the time.
Getting back to the original subject with 1100-1200hp there isn't enough power for carrying fuel, armament and keeping good performance. Look again at the spitfire MK II data. Lets assume that they can stick even an extra 30 IMP gallons inside the plane (getting rid of the pesky fixed tank) and rig a 30-45 imp gallon drop tank. The drop tank takes care of forming up and climbing to altitude ( some of these planes could burn 25-35 gallons just getting to 30,000ft). Now you have used some internal fuel for warming up and take-off but you are at combat altitude with over 100 imp gallons of fuel or 30-40 more than an "interceptor" would have. While 5-6% more weight has a negligible effect on speed it does have a fair effect on climb, ceiling, and ability to turn.
Ability to turn is not simply how tight the turn radius is but how how fast speed bleeds off in the turn and how tight or at what rate the plane can turn and maintain altitude, not have to dive to maintain speed. Some of these early fighters can only maintain speed in a hard (4-6 "G") turn by loosing several thousand feet of altitude per minute.
Good performance includes climb and altitude as well as speed. One source gives a late model Japanese KI 61 (two type Ho-5 cannon and two H-103mg) as needing 7 minutes to climb to 16,400ft while a MK II Spitfire can get to 20,000ft in the same time. The Spitfire has nearly 5,000ft more service ceiling. While nobody fights at or near the service ceiling it means that the operational and combat ceilings are probably in the Spitfires favor by 3-4,000ft.
We can chew over the numbers endlessly but there can be no doubt that over Malta the Hurricanes were totally outclassed by the Me109.
Prior to that the Hurricane could compete with the Bf 109 E over Malta just as well as it had done over England in 1940. There are many tactical reasons why the RAF's Hurricane force was overwhelmed over Malta but simply blaming an aeroplane that had been the mainstay of Fighter Command months earlier and was fighting the same German opponent and mostly inferior Italian opponents just doesn't work.
The aircraft were different, however. Over Malta, the Hurricane I was much worse and the Bf 109E only got better.
How had the Bf 109 E "got better"?
The Bf 109 Es committed to the Maltese campaign were essentially the same as those fighting the battle of Britain. Some may have had DB 601 N engines, but given the arguments raging at the RLM about which aircraft should get what engines it would not have been all.
How were the Hurricanes "much worse"?
Hurricane Is but mostly Hurricane IIs were sent to Malta. The Hurricane IIs which were powered by the Merlin XX and were delivered to the RAF from October 1940 could do 342 mph at 17,400 feet, in S gear, just 20mph slower than a Spitfire.
Really? Where's that from? I can't check now but that would be a bizarre way of moving aircraft to the Middle East.
Cheers
Steve