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The Arado went from a pair of 760mm dia, 740kg engines to four 690mm dia, 624kg engines.
British are using 1046-1092mm dia engines (power jets, Welland, Derwent) that weigh under 445kg OR the 1270mm dia, 680kg Goblin.
A Vampire MK 5 held 330imp gallons of fuel plus two 100imp gal drop tanks and had a range of 590 miles at 350mph at sea level. At 30,000ft the range could stretch to 1145 miles.
In 1941-43 the British were much more interested in bombing Germany than bombing the Belgian coast. The Germans could use Belgium, Holland and France both for forward bases and as a buffer zone from British attacks. They may not have liked the British bombing factories in the occupied countries but that was preferable to having them bomb the homeland.
Supermarine was criticized for not developing the Spiteful fast enough.
The British were interested in night bombing, an escort fighter was not their game at the time. The jet fighters were pursued as a 'next generation' of fighters, to replace Spitfire and future Typhoon/Tornado, in role of (short range) interceptors.
Start the jet fighter program there after BoB, don't wait another 2 years.
If they could have shifted manpower from Vickers why didn't they in order to sort out some of the Spitfire variants quicker?
Vickers was working on Wellingtons, The Warwick (which used Wellington outer wings and Wellington fuselage with extra sections and was pretty much a back burner aircraft due to not having engines available), the 432 high altitude fighter (rejected in favor of the Welkin) and the Windsor Heavy bomber. The last three didn't wind up amounting to anything but I am not sure I want to see a geodetic structure jet either
Late in war they were working on the Viking transport.
Couldn't possibly have had anything to do with having their main factory bombed to destruction, and many workers killed, could it?Let's not forget that the TWO most produced Spitfires (the MK V and the MK IX) were BOTH hasty improvisations because Supermarine either hadn't completed work on the more thorough updates or couldn't convert the production lines in a timely fashion or a bit of both.
All of which was dictated by the lack of suitable high-altitude Griffon enginesAs another indication of Supermarine's ability (or lack of) to handle multiple programs lets remember that the idea of a Griffon powered Spitfire was first brought up in Dec of 1939 in a company Brochure. It took until the end of Nov 1941 to get a flying example and it took another year to start delivering 'production versions' which used MK VC and MK VIII airframes.
As always, Supermarine did as they were told, and production of the XII was dictated by the Air Ministry, due to a lack of low-level Merlins, so a new Mark, with low-altitude Griffons, had to be rushed into service, to combat the low-level Fw190 attacks. There were only ever meant to be 100 airframes, that was all, and none of them ever got wing tanks.Building 55 or so MK XII Spitfires with Griffon engines and the same fuel tanks as a MK I Spitfire sure doesn't look like good planning, The last 45 got the wing tanks of the MK VIII.
They were still given the order for the "Jet Propelled Fighter Aircraft Based on "Spiteful" in January 1945, so somebody believed they could do it.Having Supermarine trying to design a jet fighter at this time either means a looong drawn out design development period and/or delays in newer Spitfire models.
It was the other way round; the Air Ministry asked, Supermarine responded, then, if satisfied, the Air Ministry gave them an order.Joseph Smith and crew did an amazing job in constantly updating/upgrading the Spitfire beyond what the Air Ministry though possible but they were spread thin as it was.
Couldn't possibly have had anything to do with having their main factory bombed to destruction, and many workers killed, could it?
And the V was not a hasty improvisation, but a Mark which made immediate use of the Merlin 45 when it came available.
All of which was dictated by the lack of suitable high-altitude Griffon engines
As always, Supermarine did as they were told, and production of the XII was dictated by the Air Ministry, due to a lack of low-level Merlins, so a new Mark, with low-altitude Griffons, had to be rushed into service, to combat the low-level Fw190 attacks. There were only ever meant to be 100 airframes, that was all, and none of them ever got wing tanks.
They were still given the order for the "Jet Propelled Fighter Aircraft Based on "Spiteful" in January 1945, so somebody believed they could do it.
It was the other way round; the Air Ministry asked, Supermarine responded, then, if satisfied, the Air Ministry gave them an order.
Many of you seem incapable of grasping this simple fact; the companies did as they were told. Camm, Smith, Barnes Wallis, and all the others could have as many ideas as they liked, but, without an Air Ministry go-ahead, they were still-born.
Not sure why an excuse is needed, when the first conversion was test-flown 27-9-41 (and the engine was only test-run in the spring of 1941.) The 60-series was designed for a high-altitude Wellington, and it was Hives, of Rolls-Royce, who suggested using it in the Spitfire. (It was also Rolls-Royce who did many of the early conversions - 285 in all.)Factory/s were bombed in Sept of 1940? Could very well have had an impact on the MK V situation in the winter of 1940/spring of 1941. Becomes a bit thinner of excuse in late 1941/early 1942 with the MK IX.
And that was because the airframe needed minimal work, retaining the original dimensions; fitting the Merlin XX caused the fuselage to be lengthened by 4", and caused ground stability problems, needing the u/c to be raked forward.Spitfire MK III was flying with a Merlin XX, had retracting tailwheel and internal bullet proof windscreen among other changes. Air Ministry decided that the Hurricane would get all the Merlin XX engines that went into fighters (Bomber Command got the bulk of Merlin XX engines). Air Ministry takes short cut of sticking Merlin 45s into essentially MK I/II airframes.
Internal-armoured windscreen, plus blown hood, went into production 26-4-41.Kind of addressed above. By using the MK I II airframe type the MK Vs were stuck with some of the less desirabel features of the older planes that had been designed out of the MK III (Windscreen change being good for about 6mph?)
If you check, you'll find the VII, VIII, XIV all had extra internal fuel. It's also a bit late to start considering a bigger engine, and different service usages, three years after the prototype's first flight.Sort of everybody had a hand in this one but if anybody at the factory was serious about a Griffon powered Spitfire from 1939 to 1942 it seems that some sort of extra fuel capacity should have been figured in.
Silly question; I'm sorry, but the Air Ministry specified the flight duration, and left it to the manufacturer to work out how much fuel would be needed, and where it should go. It's only possible to fit extra items into an airframe if it doesn't compromise the structural integrity; Farnborough found this out when they examined the IXs, converted in the U.S. They were deemed unsafe for combat.Feeding an engine with 25-30% more airflow than the Merlin (at the same intake pressures) was going to take more fuel regardless of what altitude they were going to operate at. Or did the Air Ministry micro manage things to that extent? instead of telling manufacturer what they wanted for endurance or range and letting the manufacturer figure out how much fuel they needed they told them what size fuel tank to put in and then demanded a certain amount of endurance or range?
All very nice and super-technical, but not a lot of use if the manufacturing company can't produce the engines needed. The XII was a stop-gap, using an engine for which there would be no further use in Fighter Command. A "make-do" was better than no aircraft at all (and it came in very useful against the V1.)I stand corrected on the wing tanks but somebody stuffed it up on the fuel capacity, as above. Griffon was going suck down 42 gallons an hour at 2000rpm and -4 lb boost. At 2400rpm and +6lbs weak mixture it sucked down 74-75 imp gallons an hour.
Merlin 45 used 31 imp gallons an hour at 2000rpm and -4 lb boost (granted it made less power) and at 2650rpm and 7lbs boost rich mixture it used only 67 imp gallons an hour. Endurance/range with Griffon and original fuel capacity (even if they did have to change the upper and lower tanks to fit the engine in ?) was going to be lacking.
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""The Spitfire was to be a sort of datum pacemaker – a 'Mr Average Contemporary Fighter' – and its job would be to come in last, the real excitement of the proceedings being by how much it would be beaten by the Fw 190 and the Typhoon, and which of these two bright stars would beat the other and by how much. Outside on the tarmac at Worthy Down stood the inoffensive-looking but highly potent DP845. Nobody had said what sort of Spitfire I sould bring. Just a Spitfire. I rang up Joe Smith. 'Joe', I said, 'about this thing at Farnborough. I reckon if I take DP845 I will beat the pair of them. Will that upset any applecarts?'
'You bet it will,' he said. 'Take it.'
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At a minimum a change in "timing" for the F.9/37 would have involves the 2nd prototype being powered by Merlins and flying in the Spring of 1940. Maybe you get production planes in the Spring of 1941?
Yes, tomo pauk - I suspect it could carry bombs. So with a more influential Army Co-operation Command do we get some bright spark ask "Can it carry bombs?"