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-   -   Spitfire/Hurricane etc and drop tanks (https://www.pprune.org/aviation-history-nostalgia/634198-spitfire-hurricane-etc-drop-tanks.html)

megan 25th Jul 2020 05:46


interestingly, no other aircraft copied the P51’s design
As noted by others the MB 5 seems to qualify, as does the Australian designed CAC 15 pictured here, was originally designed to be powered by a P&W R-2800 with turbocharger but unavailabilty required swapping to a Griffon.

https://cimg7.ibsrv.net/gimg/pprune....538e86f836.jpg

The proposed Rolls Royce FTB using components from the P-51 would also qualify.


https://cimg9.ibsrv.net/gimg/pprune....89a2b5faaf.jpg



but I'd be interested to know if the resemblance is superficial, or a sincere piece of flattery
Various sources do say the radiator made use of the Meredith effect without giving knowledgeable attribution, but it's reasonable to assume it does, particularly given the inlet is positioned out of the boundary layer. Nor is it a sincere piece of flattery, F. W. Meredith, who developed the idea, was a British engineer working at the Royal Aircraft Establishment (RAE), Farnborough and the P-51 was an aircraft designed in the USA, developed and paid for by the British ($US12 million of their scarce foreign exchange) with design input from British engineers at RAE. The USA forces had initially absolutely no interest in the aircraft, the two test aircraft given them languished on the flight line without much interest, in the meeting of USA forces to discuss the way forward with future fighters the P-51 was not even on the list of possible contenders.

Thanks to all for the P-51 headsup, yellow my favourite colour.

Olympia463 25th Jul 2020 09:27

Derby
 

Originally Posted by POBJOY (Post 10845604)
Whilst its 'interesting' debating the (pro's and cons ) of equipment design, what is far more important is having it available in sufficient numbers to be of use when required. In WW2 the Germans produced two quite outstanding piston fighters that also had engines to match. This is to be expected from the beligerent side as they had planned their requirements beforehand, and we were to a degree always trying to catch up. Of course what they did not plan for was for the war to go on for so long, and then have to contend with the might of the American production effort. Sydney Camm knew his Hurricane could be improved with a thinner wing, however had they tried to do this rather than produce hundreds of 'adequate' machines for the purpose of shooting down bombers, we would not have had enough fighters to defend the country in 1940,and that would have been the end of it. As it was the Hurricane went on to pioneer many other uses in the ground attack role, whilst the Spitfire was better able to be improved to provide the interceptor role. An attacking force has many advantages, but they are also subject to the 'mistake factor' which in itself can dramatically alter events. We were not immune to making mistakes but made less of them when it mattered. The events of 1940 are all important because had we failed then, the machines that came later would not have happened. It took quite some time for the allies to accept that our bombers would be very vulnerable without fighter escort, yet the Germans had learned this lesson the hard way in 1940. We were also vulnerable in only having one fighter engine which also went on to power our later bomber force, and had the Germans realised the importance of that engine I suspect Derby would have been flattened very early on, indeed SH readily admits he was amazed it wasn't.

It is no surprise to me that the Germans did not bomb Derby. They expected to win the war with the UK very quickly, and then take over the assets of the losers. The Rolls-Royce factories would have been very useful, if not essential, to their aim to rule the World. By the time it became obvious that this was not going to be the case, it was too late. I spent most of WWII living about three miles from the R-R factories in Glasgow. It was a wonder to us that night after night while Clydebank was being bombed, never a bomb dropped anywhere near us.

One bomb did land on Derby, but it missed the factory. It was most probably jettisoned by some aircraft being chased by fighters.

longer ron 25th Jul 2020 09:40

The Luftwaffe target selection could be fairly arbitrary to say the least,once the crews got some 'seniority' in their units (Experten) - whilst they did have to participate in unit attacks - they also were allowed to choose their own targets for a certain percentage of the unit sorties,quite often returning again and again to their chosen/favourite target.

VX275 25th Jul 2020 15:13

https://cimg1.ibsrv.net/gimg/pprune....53c2285e34.png
The RAE had an idea to improve the Mustang's Meridith effect. Basically squirt some fuel in the airflow behind the radiator and light it. (not to be tried if the tailwheel can't retract)

VintageEngineer 25th Jul 2020 16:03

The Luftwaffe did bomb RR at Derby, injuring one of my aunts working there as she ran to her shelter. The raid killed several of her friends.

FlightlessParrot 25th Jul 2020 23:47


Originally Posted by VX275 (Post 10846017)
The RAE had an idea to improve the Mustang's Meridith effect. Basically squirt some fuel in the airflow behind the radiator and light it. (not to be tried if the tailwheel can't retract)

That would have had interesting psychological effects, though who it would have scared most is open to question.

Fareastdriver 26th Jul 2020 08:49

The RAAF would have coped with it; they did with the F111.


POBJOY 26th Jul 2020 19:41

Mistakes !!!!
 

Originally Posted by Olympia463 (Post 10845799)
It is no surprise to me that the Germans did not bomb Derby. They expected to win the war with the UK very quickly, and then take over the assets of the losers. The Rolls-Royce factories would have been very useful, if not essential, to their aim to rule the World. By the time it became obvious that this was not going to be the case, it was too late. I spent most of WWII living about three miles from the R-R factories in Glasgow. It was a wonder to us that night after night while Clydebank was being bombed, never a bomb dropped anywhere near us.

One bomb did land on Derby, but it missed the factory. It was most probably jettisoned by some aircraft being chased by fighters.

Well they certainly did a good demolition job on Supermarine !!!!!

DHfan 26th Jul 2020 21:11

That's what led to the scenario mentioned by tdracer in post 40 (bottom of page 2) where there were lots of small "backstreet" workshops making Spitfire parts. When the Supermarine works were bombed, there obviously wasn't a convenient empty aeroplane factory standing idle just waiting to be needed and moved into.
To make parts wherever they could was the only real option.

megan 27th Jul 2020 02:04

Was at the Southampton museum where they showed us what they claimed was the only jig remaining of Spitfire production, a fairly crude piece of woodwork fixture, said to be used by a group of ladies sitting around the kitchen table at home making up a certain piece of fuel pipe.

POBJOY 27th Jul 2020 20:01

Castle Bromwich scandal
 

Originally Posted by DHfan (Post 10846978)
That's what led to the scenario mentioned by tdracer in post 40 (bottom of page 2) where there were lots of small "backstreet" workshops making Spitfire parts. When the Supermarine works were bombed, there obviously wasn't a convenient empty aeroplane factory standing idle just waiting to be needed and moved into.
To make parts wherever they could was the only real option.

It took Beaverbrook to kick start CB when in fact it should have been flagged up a year earlier, and Supermarine sent along to 'assist'. It was pure luck that the Southampton Spitfire production lasted until Aug/Sept, had they been knocked out earlier then it may have been more than a 'Damm Close Call'. Only about 100 CB Spitfires mde it to the front line for the BoB,and then rather late.

R6915 28th Jul 2020 13:26

Supermarine history can be a little tricky, can I reccomend a website named the SUPERMARINERS that is accurate and expanding all the time

POBJOY 29th Jul 2020 19:03

Supermarine production
 

Originally Posted by R6915 (Post 10848121)
Supermarine history can be a little tricky, can I reccomend a website named the SUPERMARINERS that is accurate and expanding all the time

JQ makes the point that they were very lucky not to loose the Eastleigh facility 'erecting shop and testing' and all running from the WW1 Belfast hangars on site, as the Cunliffe Owen new factory was heavily blitzed and not able to help take the load from the Itchen and Woolston production factories.
Dowding had been under great pressure to send Spitfires to France but stood firm as he knew we needed everyone one of them for home defence. Even so their numbers were whittled down by the evacuation,and it is surprising that the Southampton production facilities lasted so long. But that is the way of conflict, long term plans become obsolete overnight, and although CB were late on parade their contribution was a 'tide turner' that the Germans could not stop.
Of course whilst all this was going on the dear old Hurricane was pouring out of Gloucester and Kingston thereby ensuring we al least had a capable defender to fall back on. Sydneys hump backed knuckleduster had its drawbacks,but in the right hands was a bit of a bruiser.


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