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View Full Version : Question on P-40 Mr. Maddox



Cragger
03-08-2004, 03:02 PM
Not a gripe or complaint but I was wondering if the max speed at altitude information for the P-40E in the object viewer is wrong. It states 539kph at 1534m but no matter what I do at 1500m I can only get 468kph. Now seeing as it had less horsepower than the M which states 492kph and 539kph would be faster than the P-39N1 I just figured the data in the viewer is wrong.

Tried to search for a official post on this as I'm sure its been discussed before but came up empty.

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Cragger
03-08-2004, 03:02 PM
Not a gripe or complaint but I was wondering if the max speed at altitude information for the P-40E in the object viewer is wrong. It states 539kph at 1534m but no matter what I do at 1500m I can only get 468kph. Now seeing as it had less horsepower than the M which states 492kph and 539kph would be faster than the P-39N1 I just figured the data in the viewer is wrong.

Tried to search for a official post on this as I'm sure its been discussed before but came up empty.

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Kwiatos
03-08-2004, 05:21 PM
And why P-40 E has the same climb rate like P-40 M? P-40 should have 11 min to 6100m instead 7.

WWMaxGunz
03-08-2004, 05:53 PM
Try reducing prop pitch once you have the 40 going as level fast as you can and full power. In fact, make your runup towards that at less power while the plane is just gathering speed or even rise, get to speed at 90% power and 90% pitch then do a slow drop while you pick up power to full. You may find the best pitch to be more or less 90%, maybe even 80%-85% while at maximum speed. Pitch in the P-40 is desired engine revs and yet, well try and see, I get better speed at 90% power and 90%-95% pitch than 90% power and 100% pitch when trimmed out in level flight, so.....

A thought:
There's also how the rads on automatic may be opening more when the engine is hotter and cutting rpms a tad will tend to reduce the heat even though power itself is not reduced.


Neal

Maple_Tiger
03-08-2004, 11:23 PM
I have tride the same thing in 1.22.

The P-40E will not reach 539kmh TAS at 1534m altitude. Best i can do is about 470kmh TAS.


It would be nice to see it even reach 530kmh TAS lol.


Its just one of thoughs planes that are unpopular i guess. I dont fly it much.


Try the P-40M. I beleave the P-40M was pretty close. I was able to reach its top speeds.

Capt. 361stMapleTiger.

http://www.imagestation.com/picture/sraid78/pd6c878f0006c224805da6c9645408b41/fb291d3e.jpg

Proud member of the FBAA and Nutty Philosohpy Club.

Maple_Tiger
03-08-2004, 11:27 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by WWMaxGunz:
Try reducing prop pitch once you have the 40 going as level fast as you can and full power. In fact, make your runup towards that at less power while the plane is just gathering speed or even rise, get to speed at 90% power and 90% pitch then do a slow drop while you pick up power to full. You may find the best pitch to be more or less 90%, maybe even 80%-85% while at maximum speed. Pitch in the P-40 is desired engine revs and yet, well try and see, I get better speed at 90% power and 90%-95% pitch than 90% power and 100% pitch when trimmed out in level flight, so.....

A thought:
There's also how the rads on automatic may be opening more when the engine is hotter and cutting rpms a tad will tend to reduce the heat even though power itself is not reduced.


Neal<HR></BLOCKQUOTE>


You cant change prop pitch direclty. The P-40 does not have manual prop pitch. It's a CPS plane. All your doing is redusing your RPM.

Capt. 361stMapleTiger.

http://www.imagestation.com/picture/sraid78/pd6c878f0006c224805da6c9645408b41/fb291d3e.jpg

Proud member of the FBAA and Nutty Philosohpy Club.

WWMaxGunz
03-09-2004, 04:35 AM
I know. Try it. It may help. It does on less power while cruising on other CSP planes for me. And yes, I've gotten the P-40E to pick up some speed that way.

I've seen a military pilot with a love for the P-40's post here about the speed tests he ran on it last year and he said that flown right, it matched.


Neal

Maple_Tiger
03-09-2004, 09:04 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by WWMaxGunz:
I know. Try it. It may help. It does on less power while cruising on other CSP planes for me. And yes, I've gotten the P-40E to pick up some speed that way.

I've seen a military pilot with a love for the P-40's post here about the speed tests he ran on it last year and he said that flown right, it matched.


Neal<HR></BLOCKQUOTE>


I have tride it... many times. I do alot of speed tests using differant settings ect.

With 100% or 95% RPM setting there is no real differance, the RPM is still very close to combat RPM at 95%. You just dont overheat as quickly.

Reducing RPM to like 90% youl notice a very small drop in your speed, about 5 kmh TAS.

Best thing to do is use about 75% power and 75% throttle with rad on 2. Once you cant go any faster just increase to 85% RPM and 85 power. I do this untill i reach 100% RPM and 100% Power. Then i close rad and use 110% power.


I can actualy get the P-40M to go about 12kmhTAS faster then it should go. But yet the P-40E is like way too slow for some reasone.

Capt. 361stMapleTiger.

http://www.imagestation.com/picture/sraid78/pd6c878f0006c224805da6c9645408b41/fb291d3e.jpg

Proud member of the FBAA and Nutty Philosohpy Club.