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This simply is not supported by the experiences over Malta, where both hurricanes and Fulmars fought side by side in a situation heavily dominated by the enemy. Fulmar here was at least as challenged as it would have been had it been used over SE England, and whilst I freely agree it had no chance of affecting the air state, claiming it would be shot out of the sky over SE England because of the superior performance of the 109 is just a fallacy.... Speed is basically irrelevant to survivability. Speed leads to whether you can gain the upper hand, it counts for virtually nothing when you are fighting slow moving bombers. it was because their speed advantage, along with their numbers and the skill of their pilots that the 109s dominated the sky over Malta for so long as they did.
I don't think the Fulmar in any way belongs in the air at 15 to 20,000 feet attacking German formations.
In order of speed: Spitfire, Hurricane, Defiant, Fulmar. Climb performance is even more sobering. Not a good interceptor at all for the Battle of Britain. Even the Blenheim fighters were a better choice.
Some sources say the Fulmar I could do 255mph at 9000ft ...
But we're not talking about a Fulmar I. We're talking about a P.4/34 developed into a single seat (why twin?) RAF heavy fighter and such a fighter would be ~1000 lbs lighter than a Fulmar I. The P.4/34 made 284 mph at ~16000ft with a Merlin II engine. (at 2850rpm and 4lb boost according to David Brown ). Pop a Merlin XII into it and it should be quite a bit faster than the P.4/34 and with 8 x mgs and 750rpg it has a lot more firepower than the Hurricane, for example.
In any event, if the RAF didn't order the Hurricane or Spitfire, they would pretty much have had to order something else in volume, such as an Gladiator with uprated engines and a CS prop, but if not that then what?
Could beLooking at the graph it isn't unreasonable that a fast Fulmar - perhaps lighter than the one tested - could be 8ish mph faster at 9,000 feet (full throttle height of the Merlin VIII without emergency boost)
You're contradicting yourself; in one sentence you say speed was not essential, yet you also state the reason the 109s dominated over Malta was because of their speed advantage and their numbers and pilot skill?
These are exactly the advantages the far larger numbers of 109s the Fulmars would have encountered over SE England would have enjoyed. 265 mph (Fulmar Mk I) v 354 mph? That isn't just a "speed advantage" - the 109 could cruise faster than a Fulmar's top speed! Apart from that, the Fulmars in the Mediterranean, or over and around Malta, rarely, if ever encountered Bf 109s, nor can I find references to Fulmars shooting down 109s - but, I'll keep looking.
Not to mention the Fulmar's very slow rate of climb cf Spitfires and Hurricanes. The British fighters were at their most vulnerable when they were climbing for altitude where they could be - and often were - bounced by 109s which were already flying at higher altitudes. Fulmars trying to climb to altitude after a scramble would have been far more vulnerable. The slow ROC also meant that Fulmar units would have needed to be scrambled far earlier than the Spitfire and Hurricane units, or Fighter Command would have been forced to fly standing patrols in the hope that they could intercept Luftwaffe formations.
Unfortunately, had Fulmars been employed in large numbers during the B of B, they would have been shot down in large numbers before they could close with the Luftwaffe bombers.
parsifal if you can get your hands on it, I highly recommend 'Hurricanes Over Malta' by Brian Cull and Frederick Galea. It is packed to the brim with information and anecdotes on the struggle over Malta from June 1940 to April 1942. It doesn't paint a very rosy picture of the Fulmar's capabilities, numerous examples of bravery and determination notwithstanding.
A choice quote from a quick skimming to sum up the situation:
'Despite the rapidly deteriorating availability of the Hurricanes, the few remaining Fulmars were considered too vulnerable to fighter attack and unsuitable as interceptors, and the policy was for them to remain around the fringes of a raid and pick off stragglers.'
If you are going to build a single seater just build a new airplane. Leaving out the rear seat and fairing over the cockpit doesn't gain much. To save 1000lbs you are going to need to do more than just leave the rear seater home and rip out the radio gear. Not to mention that most of the weight you want to remove is behind the center of gravity. Having twice the ammo doesn't really give you twice the firepower, it allows to shoot with the SAME firepower twice as long which is not quite the same thing. BTW 400rpg for 8 guns is 192lbs not including the weight of the ammo boxes. Or about the weight of a second crew man.
Gladiator with "uprated" engine and CS speed prop should see a lot better climb at low altitude but improvement at higher altitudes would be minimal, as would speed increases. That is unless you uprate the Mercury waaaay beyond what was done historically.
The did run them on occasion at 9lbs of boost with 100 octane fuel but just like the Merlin III, this only affected power below the FTH of 13-14,000ft. To "uprate" more than that you need more/thinner/longer cooling fins which may or may not require different manufacturing techniques. You may need a new (bigger) supercharger and drive. Just changing the gear ratio isn't going to get you much. Getting 840hp at 13-14,000ft from a 25 liter air cooled engine was doing pretty good as it was. The Wright R-1820GR205A that gave 1200hp for take-off on 91 octane was only good for 1000hp at 14,000ft from it's 30 liters and it weighed 300lb more than Mercury.
Without speed, you cannot really win air superiority, but also without sppeed, you can survive. there is a world of difference between the two issues, and ther is no contradiction. i dont know how many times Ive had this sort of discussion, basically because most people dont understand the difference between air superiority, air supremacy and being able to challenge the air state.
Without speed Fulmars, or any other fighter cannot control the air state. the best they hope to do is sneak up and pick off an odd bomber or two.. thats exactly what the air garrison managed to do over Malta, with just 3 losses in air combat in over a year of fighting (ther were other losses, but not to fightres). And because Malta was a point target, and SE England is not, the concentration of 109s over Malta was always going to be larger than the tendency of small scale raids that charaterised the battles over England in 1940, despite the greater numbers of enemy fighters. That is the nature of point defence.
I tell you what, show me the evidence that Fulmars suffered an especially high rate of attrition, and I will look at the scenario differently, re-examine the factors affecting loss rates, and get back to you. but I can tell you one thing, top rated fighters dont reduce your own losses, at least not by much. What they can do is increase enemy losses,and permit your strike elements to hit with decreased vulnerability.
As to numbers, well, we will never know, so that much of your argument is sheer opinion and conjecture based on preconceived ideas and biases. what we do know is that the Fulmar, even when outnumbered 4 or 5:1 it didnt seem to bother them in the least. It just prevented them from doing their job (destroy enemy bombers) effectively, because they were too busy trying to just not get shot down. Ther is no evidence 9infront of us) for you to claim they would be shot out of the sky. There is evidence that they could survive in a hostile environment, just that it doesnt fit your conception of how air warfare is supposed to work. its a common misunderstanding
FWIW, the chart with Merlins (1st half of war, VIII included), plus table for VIII and Mk.30. Seems like Merlin III and XII have circa 300 HP more at 10000 ft than the Mk.VIII.
I am not sure what the intent of the original post was.
A fighter or fighters to supplement the Hurricane and Spitfire?
A fighter to replace the Hurricane and/or Spitfire?
To replace the Hurricane means you need to build 2000 of them by Aug of 1940.
Most anything can supplement to some some extent but obviously most (all) of the choices would be lucky to reach the Hurricanes performance (Whirlwind excepted) without major tweaking or unhistorical engines.
hanks for being condescending, that really helps your argument.
I cannot find one single instance where Fulmars were even likely to encounter Bf 109s over Malta, so, from that perspective, you have no basis for your claims that they could survive for long enough to pick off one or two bombers when faced with modern, high speed fighters flown by competent pilots.
You know ful-mar well that Fulmars did not encounter modern, high speed fighters such as the Bf 109 so there are no such attrition statistics to point to.
Nor is your hypothesis proven and, once again, thanks for your condescending remarks about my inferior understanding of how air combat works.
The P4/34 had an extra 80-100 sq ft of wing area, an extra 7-8ft of fuselage length compared to a single seat fighter Weighed as much empty as a Hurricane did loaded, and that is without guns, armor or self sealing tanks. There is no way, given the same engine, that it could perform anywhere close to even a Hurricane.
Just how much operational equipment was in the P4/34 when it was tested?
And the cube rule says that if the Hurricane did 313mph with 1030hp and the P4/34 did 283mph with same 1030hp it needs 1393 hp to get the same 313mph. Merlins with 1393hp at 16,000ft were a bit scarce in 1940. They were a bit scarce for most of 1941.
As far as the Mercury goes, They managed to get a Blenheim up to about 290 something mph by fairing the nose, clipping the wings, taking out the turret, polishing the paint and sanding rivets, AND running 100 octane gas, over reving the engine and running 9lb boost. The Mercury XV engine had the SAME ratings as the MK VIII used in the Gladiator. Differences were it was capable of taking the controllable pitch prop (Different shaft? and oil pump for the pitch mechanism.)
All the Gloster F.9/37 needed was an engine that actually worked more than occasionally. The 2nd prototype when powered with a different model Taurus engine saw the speed drop to 330mph and most production Taurus engines were rated for an altitude of 3500ft and had cooling and reliability troubles at that altitude. Throw that in with Bristol NOT solving the sleeve valve production problem until the summer of 1940 ( they could make limited numbers of decent sleeve valves but not large numbers) and you would have production starting in Aug/Sept. a little late.
Powerplant: (100 Octane Fuel) Two Bristol Mercury XV 9-cylinder poppet-valve air-cooled radial engines developing 905 hp (675 kW) at take-off, a maximum output of 995 hp (742 kW) for level flight (5 minute usage) and a maximum ecomical cruising power output of 590 hp (440 kW) at 16,000 ft (4877 m) at 2400 rpm. (87 Octane Fuel) Two Bristol Mercury XV 9-cylinder poppet-valve air-cooled radial engines developing 725 hp (541 kW) at take-off, a maximum output of 840 hp (627 kW) for level flight (5 minute usage) and a maximum ecomical cruising power output of 590 hp (440 kW) at 16,000 ft (4877 m) at 2400 rpm.
Bristol Blenheim
and the proto-Fulmar had ~40 sqft less wing area than the P.4/34. The P.4/34 was flight tested at full operational weight regardless of the equipment on-board.
Mercury XV 100 octane