PDA

View Full Version : P-40/P-38: Supercharged, or Not Supercharged?



delinker
03-23-2004, 12:18 PM
I can't seem to engage the supercharger in the P40 or the P38 even though my keys are mapped and the plane is supposed to be equipped with the SC unit. I'm not the sharpest knife in the drawer here so any input is appreciated.

cheers~

Victurus te Saluto

delinker
03-23-2004, 12:18 PM
I can't seem to engage the supercharger in the P40 or the P38 even though my keys are mapped and the plane is supposed to be equipped with the SC unit. I'm not the sharpest knife in the drawer here so any input is appreciated.

cheers~

Victurus te Saluto

Korolov
03-23-2004, 12:33 PM
They both have automatic supercharger and turbocharger control. Make note that only the P-38 has turbochargers.

http://www.mechmodels.com/images/newsig1.jpg

chris455
03-23-2004, 12:52 PM
[QUOTE]Originally posted by Korolov:
Make note that only the P-38 has turbochargers.

"BE SURE" ! http://ubbxforums.ubi.com/images/smiley/16x16_smiley-very-happy.gif

http://members.cox.net/miataman1/P47.jpg

JG53Frankyboy
03-23-2004, 01:22 PM
the allisons of the P-39 , P-40 have a single stage supercharger - so you cant shift between low and high blower setting.

the P-63 is the only plane with an allison with low and highblower - seems that its shifting automatik in game

the P-38 has a Turbosupercharger, so , also no0 shifting

perhaps this link is interesting for you

http://www.unlimitedexcitement.com/Miss%20US/Allison%20V1710%20Engine.htm

Korolov
03-23-2004, 01:28 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by chris455:

"BE SURE" ! http://ubbxforums.ubi.com/images/smiley/16x16_smiley-very-happy.gif
<HR></BLOCKQUOTE>

... Of the P-40 and P-38. http://ubbxforums.ubi.com/infopop/emoticons/icon_razz.gif

http://www.mechmodels.com/images/newsig1.jpg

delinker
03-23-2004, 01:28 PM
That's outstanding info guys. Thanks for your intel and knowledge.

BTW: I'm presuming the supercharger engages once the throttle is pushed to war power rating?

EDIT: JG53Frankyboy, I followed that link and that's a huge amount of data! Thanks for the info source. I betcha if I read the entire thing I'd know everything there is to know about superchargers and the Allison engine :lol

Victurus te Saluto

JG53Frankyboy
03-23-2004, 01:32 PM
the supercharger is working all the time .
its just some planes have no manual shifted second stage , that would compress the thin air at altitude much more.
there fore the Allsion is not known as a highalt engine (with single stage charger http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif )

otherwise your engine would be breathless very fast http://ubbxforums.ubi.com/infopop/emoticons/icon_wink.gif

delinker
03-26-2004, 09:51 AM
Perfecto. I appreciate the information very much http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

Victurus te Saluto

dahdah
03-26-2004, 10:10 AM
That is a great site, bookmarked it a while ago but could not access it recently.

Just fyi, an Allison powered Unlimited won 2 races last year, beating the turbine boats like Miss Budwieser.

Cpt_Rio
03-26-2004, 10:44 AM
The P40E has a 2 stage supercharger

JG53Frankyboy
03-26-2004, 11:03 AM
no - not in game (1.22 and 2.0) not in real

Cpt_Rio
03-26-2004, 11:20 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JG53Frankyboy:
no - not in game (1.22 and 2.0) not in real<HR></BLOCKQUOTE>

You can check the P40E 2 stage supercharger in AEP right now if you want....Just get in one and dont forget to map the keys

JG53Frankyboy
03-26-2004, 11:31 AM
pls dont forget that the P-40E M-105 is a soviet fieldmodification with a soviet engine M-105 , same as Yaks and LaGGs - and that , sure has two stage chargers.

the allison driven still habe single stage

WhiskeyRiver
03-26-2004, 11:53 AM
you guys are confusing your terms here.

Two stage- 2 superchargers or turbochargers run in series. The P-63 uses a two stage system.(also 2 speed).

Two speed- Super charger has high and low boost settings. Some are manually shifted like the Zero or Hurricane. Others shift automatically(like the Mustang).

Not being nit picky it's just that people might be cinfused as to whats being debated.

Another example would be the Bf109. It uses centrifugal single stage supercharger driven hydraulically via torque converter. It is a 2 stage system though. At a certain pressure altitude a valve opens increasing fluid pressure in the torque converter thus spinning the supercharger faster and increasing boost.

So it would be a single stage 2 speed supercharger.

To kill me you've got to hit the heart Ramon--Clint Eastwood

Cpt_Rio
03-26-2004, 11:56 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JG53Frankyboy:
pls dont forget that the P-40E M-105 is a soviet fieldmodification with a soviet engine M-105 , same as Yaks and LaGGs - and that , sure has two stage chargers.

the allison driven still habe single stage<HR></BLOCKQUOTE>

You're right

WhiskeyRiver
03-26-2004, 12:17 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Cpt_Rio:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JG53Frankyboy:
pls dont forget that the P-40E M-105 is a soviet fieldmodification with a soviet engine M-105 , same as Yaks and LaGGs - and that , sure has two stage chargers.

the allison driven still habe single stage<HR></BLOCKQUOTE>

You're right<HR></BLOCKQUOTE>

critical altitude for the M-105 engine is still only 4000 meters. Thats when the second stage cant sustain boost any more. The single stage Allison of the P-40E has almost exactly the same critical alt.

To kill me you've got to hit the heart Ramon--Clint Eastwood

Luftcaca
03-26-2004, 12:36 PM
pretty interesting topic

Correct me if Im wrong but the Airacobra at first had an Allison with a 2 stages Supercharger BUT it was changed for a basic one stage supercharger to reduce the weight or something, thats why it never weas really succesful in the Pacific theaters but had more success on the Russian front since the fights happened mostly under 4000 m

http://www.ifrance.com/boussourir/luftcaca.jpg

Formerly ''known'' as Gunther Aeroburst

Januss
03-26-2004, 12:59 PM
The Russian P-39 were lightened by taking out a part of the shielding and removing two of the four browning machine guns (sometimes removing all brownings , just keeping that T4 37 mm canon ) , and besides they never took 100% fuel .
For example Golodnikov , a Russain ace did that on his airacobra with successful results during the war , the P-39 in Russia were really lighter than the US original version , and used to their maximum power : the engine in Russia for a P-39 lasted like 15-20 hours , whereas the US pilots were using it for 50-60 hours.