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Subject: The P-40 Thread
RockyMTNClimber    3/11/2009 12:41:01 PM
From time to time old US fighters get mentioned on these boards and I am suprised at how little respect the P-40 Kittyhawk/Warhawk, Tomahawk gets given the sterling accomplishments the aircraft achieved in the hands of Allied pilots during WWII. When the war started in 1941 there were two primary modern US types. The Army's Curtis P-40 and the Navy's Grumman F4F Wildcat. These aircraft both shared the American penchant for aircraft of rugged construction, heavy armament, and pilot protection.

The P-40 featured a supercharged Allison 1170 hp, liquid cooled V12 engine with a critical altitude of 15,000 feet msl (critical altitude is the elevation at which the engine's supercharger will produce sea level manifold pressure). It's advantages over its adversaries were as follows:
P-40 v. A6M Zeke/Zero, P-40 was faster in level flight than any of the contemporary A6M's. it had a maximum dive speed of 480mph v. the Zeke's 350mph. The typical load out of armament for a P-40 was 6 .50 caliber heavy machine guns; the Zeke/Zero had two rifle caliber machine guns in the nose that were suplimented by two short barrelled 20mm cannon. The P-40 had pit armor and self sealing tanks where the Zero was utterly un armored and caught fire with a single hit from a tracer bullet, even a rifle caliber bullet! The P-40 had superior roll and turning rates at any speed above 250mph. As long as the P-40 pilot stayed above 250 mph the Zero could not turn or roll with it! Another critical advantage for the P-40 was its ability to withdraw from a fight by diving away. Litterally, the allied pilot could choose the time and place to engage and disengage.

P-40 v. BF-109; The P-40 had superior dive speed, again allowing the allied pilot to disengage or fight at his choosing. It also could turn inside of the 109 and arguably the US six .50 guns were a better choice for air to air combat.

The ultimate proof is that allied pilots scored consistently better kill ratios against their enemies. This is true whether you are talking about allied pilots fighting A6M or the BF-109 or other types. This is also true when you discuss veteran enemy pilots against allied rookies.

Simply put the P-40 was a great aircraft that allowed allied pilots to win early and win often. It was later overshadowed by better allied aircraft and that is okay too, but give the girl her due.

Check Six

Rocky


 
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HERALD1357       3/19/2009 2:04:53 PM

Herald, your reply to my last post is a bunch of spin that does not address the issues I have been raising. Mostly irrelevent to the problems inherit with your canard design, which are;

I will write with clarity because every citation I made was ON POINT, Rocky. 

1. better options abound.
 
Not in this case. 
a. All American tech.
b. Entry into service date must be NLT than 1940 so that it will be contemporary with a our best medium and heavy bombers.
c. Best possible engine outcomes are actual turbo-charged Allisons or a Pratt radial corncob (possible). The performance criteria call for a two man crew and high altitude. That is NOT the P-38. 

2. unsafe to exit under any flight conditions. (suicide machine which is unacceptable to western standards)

a.  SAAB 21 and Ascender would both have solved the problem the same way, belly bailout in the chair with inertia throwing the pilot and crew clear.
b.  Plus woith Jack Northrop designing bomber rammers to USAAF spec; the "Black Bullet", who are you trying to kid with the kamikazi bailout stuff?  
 
3. slow, low wing loaded, terribly unmanuverable dog that can barely even run with an A20. A sick and anemic thing.
 
a. Are you kidding? 
 
b. Here's the niumbers workup:
 
Specifications:(projected)
General Characteristics
Crew:                              2
Length:                          57.5 feet (17.5 meters)
Wingspan:                    64 feet (19.5 meters)
Height (tailfin):             17.25 feet (5.25 meters)
Wing area:                    1183.5 square feet (110 square meters) 
    Wing loading:          21.12 pounds per square foot (103 kilograms per square meter) 
Empty weight (dry)     16,000 pounds (7,270 kilograms)
Loaded weight (wet)   25,000 pounds (11,360 kilograms)
Engines (two):              P&W R-2060 corncob radials 1500 horsepower ( 1120 kilowatts) each. or
                                        Allison V-1710 1500 horsepower (1120 kilowatts) each, turbo-charged      
Performance:                
      Maximum speed     336 miles/hour, 300 knots  (555 kilometers/hour)  
      Cruise speed           224 miles/hour, 200 knots  (270 kilometers/hour)
      Combat radius         909 statute miles, 810 nautical miles (1500 kilometers)
      Optimum altitude    25,000 feet (7,620 meters)   
Armament: 
      Guns                         4x20 mm Colt M-1 (HS 404 British pattern) with 17 seconds of ammunition or
                                        6x12.7 mm Browning machine guns with 30 seconds of ammunition.
      Bombs                      Up to 4000 pounds (1900 kilograms of bombs)
 
Comparing her to an A-20 III is not bad, Rocky, except that the A-20 has a wingloading of 43.7 pound per square inch! The A-20 can't roll with her!  
       
4. vicious pitch characteristics under combat loads.
a. That is a basic  CG and point issue which is more critical in the YAW. If the nitwits Voisin  could solve it for a seaplane in 1911, so can I. 
b. That canard has control surfaces for a reason.
5. Canards were experimented with and rejected, for good reason.
 
a. Not enough time to work the kinks out. You need three to five years not one to two. 

6. beyond the rational ability to produce by 1939.
 
a. Not proven.  P-38 shouldn't have worked by your objections either. 

7. can't bomb with it (don't bother with trapezes Herald, planes bobble in 3-D and those props will eat metal regularly)
 
a. use a tumble home like the Avenger did for its torpedo then. The trapeze chute works simpler.

8.  simply would not achieve the mission you have set for it (LR escort), instead it would kill allied pilots, a-la Me-110.
 
a. The BF-110 had a wing loading of  35.74 pounds per square foot and pretty boy Willy doesn't have the NACA airfoil research to fix that thick wingchord he screwed up.

9. USAAF would not buy it anyway, see 1-8 above.

CREF 1-8 replies.

Now so far all you have done is spin this and I don't blame you for that but we'll have to agree to disagree. Bro, I'm fairly well grounded in the technology and clearly your dog ain't gonna hunt.

Check Six
 
Rocky

Shrug. At least we both agree to disagree amicably. All I ask of the aircraft is that she perform according to the numbers. She does.

Herald
 

 
 
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JFKY    Interesting factoid   3/19/2009 2:07:53 PM
From Wiki
 
"In the following two weeks, there were almost 1,600 further sorties against the four cities, destroying 31 square miles (80 km²) in total at a cost of 22 aircraft. "
That is a loss rate of 1.375% per sortie...not bad.
 
"By June, over forty percent of the urban area of Japan's largest six cities (Tokyo, Nagoya, Kobe, Osaka, Yokohama, and Kawasaki) was devastated. LeMay's fleet of nearly 600 bombers destroyed tens of smaller cities and manufacturing centers in the following weeks and months."
600 a/c huuuu'uuuum that means that the 24 a/c destroyed in the Japanese air raids inflicted a loss rate of 4% of the force...not bad, but not the end of the world either and the raids were not repeatable by the Japanese as their loss rate was 100%.  That's an exchange I'll take.
 
 
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HERALD1357    One factoid you ignore.   3/19/2009 3:37:04 PM

From Wiki

 

"In the following two weeks, there were almost 1,600 further sorties against the four cities, destroying 31 square miles (80 km²) in total at a cost of 22 aircraft. "

That is a loss rate of 1.375% per sortie...not bad.

 

"By June, over forty percent of the urban area of Japan's largest six cities (Tokyo, Nagoya, Kobe, Osaka, Yokohama, and Kawasaki) was devastated. LeMay's fleet of nearly 600 bombers destroyed tens of smaller cities and manufacturing centers in the following weeks and months."

600 a/c huuuu'uuuum that means that the 24 a/c destroyed in the Japanese air raids inflicted a loss rate of 4% of the force...not bad, but not the end of the world either and the raids were not repeatable by the Japanese as their loss rate was 100%.  That's an exchange I'll take.

 

The Japanese did not commit their fighter force to bomber defense.
 
Why?
 
DOWNFALL. They needed to hoard fuel and aircraft to generate the 10,000 kamikazi sorties they thought they needed to have a chance when MacArthur came for them.
 
That is one of those inconvenient facts you don't consider when you cite the numbers, JFKY . 4% bomber losses under those corrected wartime conditions per specific raid would be considered AWFUL.
 
Because it means what weak fighter opposition there was, was effective.

Herald
 
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JFKY    No Herald...   3/19/2009 3:51:46 PM
it means it was INEFFECTIVE...the Japanese did not inflict losses severe enough to curtail operations....It's not hard to grasp, sustained losses over 6% bomber operations are reduced or halted...effective air defense.  Japan could NOT inflict that level of loss, they gave up trying and instead hoarded their a/c...the USAAF WON the air campaign, by default.  They gave up trying to defend Japan and concentrated on hoarding their surviving a/c for a massive suicide operation to inflict casualties. 
 
Another point, you create a LIQUID-COOLED radial....doesn't that defeat the best feature of the radial, it's simplicity and ruggedness?  Seriously, isn't the advantage, that in ground attack especially, the lack of radiators and the like made them less vulnerable to ground fire.  And that once hit, they could absorb more damage?  So is the development of a radial, liquid cooled engine really a step forward?  How do you justify it?  Horsepower, horsepower per pound, or the like?  I'm just wondering.
 
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JFKY    Oh and Herald   3/19/2009 7:18:20 PM
That 4% loss rate was from a series of PIN PRICK raids...which cost the Japanese FAR MORE than 4% loss rates...the 24 a/c destroyed probably didn't lose their crews, the most valuable resource.  Apples to oranges.  I see you don't note the less than 2% loss rate for actual bombing sorties, in the Tokyo and four later raids.
 
Again figures don't lie, but prevaricators figure....or at least spin the numbers, right?
 
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sentinel28a       3/19/2009 10:16:36 PM
I'm coming to the party late, but according to the sources I've read, the Japanese interceptors also had a very tough time getting to the B-29's altitude.  Had we used the B-29 over Europe, the Bf 109 and Fw 190A couldn't have gotten high enough to intercept.  Some Japanese interceptors (like the Raiden or the Toryu) could make it up to the B-29's height, but not easily.  This was less a problem when the B-29s switched to low-level night incendiary attack.  It is worth mentioning, however, that LeMay thought Japanese fighters were enough of a threat that P-51s were based on Iwo Jima as quickly as possible.
 
Another factor might be that the Japanese, as Herald mentions, were very short of aviation fuel and also faced an engine shortage in mid-1945.  Most of their engine factories were either burned out or wrecked by earthquakes (Japan just couldn't get a break in 1945, could they?).  Moreover, what gas they had was poorly refined and tended to gum up engines.  Captured Raidens given 110 octane American fuel outperformed anything in the inventory and could keep up with a Bearcat.
 
 
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HERALD1357    JRKY reply. I provided data. You might actually want to LOOK at it.    3/19/2009 10:42:13 PM
Read up top, ruben. See that 400+ B-29 plane raid with the 158 P-51 escorts and the 26 aircraft losses?  5% Chuckie. Some pinprick! Happened more than once with values bouncingt around 2.3-6.2% .
That 4% loss rate was from a series of PIN PRICK raids...which cost the Japanese FAR MORE than 4% loss rates...the 24 a/c destroyed probably didn't lose their crews, the most valuable resource.  Apples to oranges.  I see you don't note the less than 2% loss rate for actual bombing sorties, in the Tokyo and four later raids.

 

Again figures don't lie, but prevaricators figure....or at least spin the numbers, right?


You might want to stop while you are way behind. I already consigned you to list two. List three i9s not that far off.
 
 Herald
 
 
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YelliChink       3/19/2009 11:24:45 PM
 
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earlm       3/20/2009 1:04:12 AM
 Dornier 335 used two DB 603s.  Look at the displacement, 44.5L or in US units a V2715.  All that to get about 1700 HP.  No wonder they needed two.
 
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JFKY    Herald   3/20/2009 10:58:51 AM
Obviously doesn't even read his OWN material..Chuckie....the "24 a/c" raid is the raid(s) YOU YOURSELF BRING UP, by the Japanese on the US Air bases, not losses sustained over Japan...and hence Apples to Oranges...
 
You need to keep up with your own stuff...before I consign YOU to some second rate list...stick with the stuff yo know...technical details...leave the wider historical record to others...or at least argue consistently in your own postings.
 
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JFKY       3/20/2009 11:09:17 AM
Obviously we now debating the NECESSITY rather than the DESIRABILITY of fighter cover for the bombing of Japan.  We have moved past the Herald Canard discussion.
 
One raid suffered 5% losses, 5 raids sufered a loss rate of 1.375% I still argue that the evidence shows that XXI Bomber Command did not feel air cover was NECESSARY for the Home Island Campaign, as they never curtailed operations over Japan.
 
Much of the campaign occured at low level at night, where fighter cover was IRRELEVANT...
 
And Herald on the 5% loss raid, what is the break down of loss, how many to Flak how many to fighters...Without that, well we can't say whether fighters were necessary.
 
You are on solid ground when you're talking tech, not so solid ground when it comes to talking HISTORY or analysis.
 
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HERALD1357       3/20/2009 4:45:13 PM

Obviously we now debating the NECESSITY rather than the DESIRABILITY of fighter cover for the bombing of Japan.  We have moved past the Herald Canard discussion.

Killing Kamikazi bases and going after the JAAF was a counter-air mission as the Japanese defended their aviation assets..n HMMMMMM. Fighters?

One raid suffered 5% losses, 5 raids sufered a loss rate of 1.375% I still argue that the evidence shows that XXI Bomber Command did not feel air cover was NECESSARY for the Home Island Campaign, as they never curtailed operations over Japan.

Several rais (3) suffered mortew than 3% losses. Those were big raids. Yes I did look at my data.   

Much of the campaign occured at low level at night, where fighter cover was IRRELEVANT...

 Nonsense. That was where our fighters fought theirs.

And Herald on the 5% loss raid, what is the break down of loss, how many to Flak how many to fighters...Without that, well we can't say whether fighters were necessary.


You are on solid ground when you're talking tech, not so solid ground when it comes to talking HISTORY or analysis.

Wrong on all counts, JFKY, as usual..
 
 Herald
.
 
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JFKY    Herald    3/20/2009 9:39:38 PM
Killing Kamikaze bases and going after the JAAF was a counter-air mission as the Japanese defended their aviation assets..n HMMMMMM. Fighters?
1)  By your own admission the Japanese were not using their air assets, but hoarding them, so by your own theory fighters were NOT going to defeat the Japanese air assets as they weren't flying...try to keep up with your OWN arguments.
2) Counter-air is best achieved by BOMBING the air fields, not by aerial combat...so as long as we cold put bombs on target we didn't need fighters.  I will say that the Japanese really did a great job of camouflaging their air craft.  We weren't going to bomb their kamikaze force out of existence.
 
 
Several rais (3) suffered mortew than 3% losses. Those were big raids. Yes I did look at my data. 
 Good what inflicted the losses...fighters, flak, or operational causes?  See without that you can't say anything about the value of fighters, unless you're going to claim fighters were going to defeat flak or over-heated engines.  Again, you're "spinning" your data.
 
Nonsense. That was where our fighters fought theirs.
Yeah, low-level AT NIGHT...where they didn't fly fighters and our fighters were ineffective, because they weren't NIGHT FIGHTERS.
 
So I guess rather than being wrong on all counts..I'm doing pretty good and Herald just keeps spinning the same answers over and over..kinda of like Blue Wings, you keep saying the same thing over and over...whether or not it supports your cause.
 
I don't dispute the utility of P-51's over Japan, but I dispute their NECESSITY.  And you have yet to demonstrate the necessity of their presence, especially as the most devastating raid occurred before fighter cover was available.  that would be the Tokyo Fire Raid.  Fighters couldn't participate and even had they been in range they still couldn't have aided the raid, as it was run at night.  And it was run by INDIVDUAL a/c not Boxes of a/c...so the night and the bomber stream really negates the utility of any US fighter a/c.
 
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sentinel28a       3/21/2009 1:01:21 AM
Let's see if I can help out a bit here--according to Richard Frank's Downfall (an excellent book, BTW), Japanese nightfighters at first were pretty poor stuff, but got better.  On the 9-10 March 1945 mission to Tokyo (the first of the low-level incendiary raids), 14 B-29s were lost to either flak or mechanical failure.  On the second raid, 25-26 May, 26 were lost, half to nightfighters.  The Japanese learned quick and adapted their Toryus to carry upward-firing cannon, similar to the German schrage musik.  The loss of so many B-29s in the May mission caused the USAAF to switch to daylight raids for the remainder of the firebombing campaign, until 15 June.  LeMay required P-51 escort from Iwo Jima for these missions to give the B-29s some help against Japanese interceptors. 
So the Japanese fighter arm was not wholly devoted to kamikaze or were being held back for those missions.  Average losses for the daylight missions were about 10 B-29s and five P-51s a raid, which isn't bad by the standards of, say, Schweinfurt.   Average losses for the night raids not on Tokyo were ridiculously low--24 aircraft between March 9 and March 25, 1945, with no losses over Nagoya and only one over Kobe.
 
At the request of the Navy, B-29s were sent to attack kamikaze bases, but these raids were failures--runways are harder to hit and knock out than area bombing cities, and the weather conditions over Japan made pinpoint bombing very difficult (one reason why LeMay decided to try low-level night raids).
 
 
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HERALD1357       3/21/2009 1:02:02 AM


Killing Kamikaze bases and going after the JAAF was a counter-air mission as the Japanese defended their aviation assets..n HMMMMMM. Fighters?


1)  By your own admission the Japanese were not using their air assets, but hoarding them, so by your own theory fighters were NOT going to defeat the Japanese air assets as they weren't flying...try to keep up with your OWN arguments.
 
In that day and age you went down on the deck to shoot up airfields since high or medium bombing didn't get the job done. Obviously you missed what I was saying when you misunderstood the bait. Biut then I expected that.

2) Counter-air is best achieved by BOMBING the air fields, not by aerial combat...so as long as we cold put bombs on target we didn't need fighters.  I will say that the Japanese really did a great job of camouflaging their air craft.  We weren't going to bomb their kamikaze force out of existence.

Is it?  What was the bombing accuracy of a level bomber at medium altitude in 1944? Answer half a mile for 50% hits. You want to reconsider that statement you tried to make without knowing the facts?

 

Several raids (3) suffered mortew than 3% losses. Those were big raids. Yes I did look at my data. 

 Good what inflicted the losses...fighters, flak, or operational causes?  See without that you can't say anything about the value of fighters, unless you're going to claim fighters were going to defeat flak or over-heated engines.  Again, you're "spinning" your data.

 I gave you the data.

Nonsense. That was where our fighters fought theirs.

Yeah, low-level AT NIGHT...where they didn't fly fighters and our fighters were ineffective, because they weren't NIGHT FIGHTERS.

 
 
 
When are you going to learn to stop the sequence: open mouth insert foot? 
 

So I guess rather than being wrong on all counts..I'm doing pretty good and Herald just keeps spinning the same answers over and over..kinda of like Blue Wings, you keep saying the same thing over and over...whether or not it supports your cause.

 You aren't even batting your usual zero %. You are headed into imaginary numbers territory. You might want to consider that when you debate history with me.

I don't dispute the utility of P-51's over Japan, but I dispute their NECESSITY.  And you have yet to demonstrate the necessity of their presence, especially as the most devastating raid occurred before fighter cover was available.  that would be the Tokyo Fire Raid.  Fighters couldn't participate and even had they been in range they still couldn't have aided the raid, as it was run at night.  And it was run by INDIVDUAL a/c not Boxes of a/c...so the night and the bomber stream really negates the utility of any US fighter a/c.

I suggest you rethink your statements, your assumptions and actually READ the history again this time with an attention toi detail and with objectivity.. 
 
Herald

 
 
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