PDA

View Full Version : Engine Overheat



XyZspineZyX
07-29-2003, 05:55 AM
What are the consequences of overheating your engine? Will it just quit if you run it too hot for too long? Will performace degrade?

Also, are there any other factors that contribute to overheat other than keeping the throttle too high? Do fuel mixture and prop pitch make a difference?

XyZspineZyX
07-29-2003, 05:55 AM
What are the consequences of overheating your engine? Will it just quit if you run it too hot for too long? Will performace degrade?

Also, are there any other factors that contribute to overheat other than keeping the throttle too high? Do fuel mixture and prop pitch make a difference?

XyZspineZyX
07-29-2003, 05:59 AM
loud grinding noises reduced performance eventually it stops http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif


real time over leaning causes overheating .. not sure if it is modelled

the main effect of bad management of prop pitch is damage from over-revving rather than overheating

and of course airspeed matters, an engine setting that is fine in a fast cruise may cook the same engine in a slow steep climb

Message Edited on 07/29/0305:01AM by WTE_Galway

fluke39
07-29-2003, 12:09 PM
just out of interest - i was going to start a new thread but then i thought i'd just tag it on here

i usually fly with mt radiator full open - so as to prevent overheating - what is the negative effects of this - i presume there is some otherwise it would be permanently open - does it slow the aircraft down?

<center><img src=http://mysite.freeserve.com/Angel_one_five/flukelogo.jpg>

XyZspineZyX
07-29-2003, 12:14 PM
fluke39 wrote:
- just out of interest - i was going to start a new
- thread but then i thought i'd just tag it on here
-
- i usually fly with mt radiator full open - so as to
- prevent overheating - what is the negative effects
- of this - i presume there is some otherwise it
- would be permanently open - does it slow the
- aircraft down?
-



* Reduced top speed

* Reduced acceleration (but longer sustained high RPM)


Basically you open up the smooth aerodynamic shape of the aircraft to let cool air in, but this also results in higher drag and some side effects.

fluke39
07-29-2003, 12:17 PM
Ketalar wrote:

-
- * Reduced top speed
-
- * Reduced acceleration (but longer sustained high
- RPM)
-
-
- Basically you open up the smooth aerodynamic shape
- of the aircraft to let cool air in, but this also
- results in higher drag and some side effects.
-

Thank you sir /i/smilies/16x16_smiley-happy.gif

<center><img src=http://mysite.freeserve.com/Angel_one_five/flukelogo.jpg>

XyZspineZyX
07-29-2003, 12:55 PM
fluke39 wrote:
- just out of interest - i was going to start a new
- thread but then i thought i'd just tag it on here
-
- i usually fly with mt radiator full open - so as to
- prevent overheating - what is the negative effects
- of this - i presume there is some otherwise it
- would be permanently open - does it slow the
- aircraft down?

I've been told that it makes radiator damage from enemy rounds more likely.

cheers/slush



http://dk.groups.yahoo.com/group/aktivitetsdage/files/Eurotrolls.gif

You can't handle the truth!
Col. Jessep

XyZspineZyX
07-29-2003, 01:54 PM
From automotive experience...problems might start with preignition (knocks and pings), which reduce power and can damage pistons over time. If water-cooled, eventually you'll cause something to rupture (hose, valve, fitting) and boil off all your coolant, a short time later (especially if run hard) your engine will literally weld it's internal parts together.

As for running with the radiator open all the time, this is bad also. Internal combustion engines run most effeciently and produce the most power at some optimum temperature (hot, but not too hot). This has to do with the volatilazation of the gasoline and the viscosity of the oil. That's a reason cars (especially carburated) often run poorly when cold. I suspect at higher altitudes it might be more difficult to keep an engine hot enough, even with the radiator closed.

Any true aircraft mechanics/pilots care to comment?

"He who joyfully marches in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would suffice." - Albert Einstein

XyZspineZyX
07-29-2003, 02:51 PM
the main effects in game of radiator armor cowl open seem to be ..


- radiator takes damage from gunfire easier (duh)
- top speed suffers on most aircraft
- low speed handling suffers on some aircraft (vrey noticably on lagg)
- fuel consumption may increase

XyZspineZyX
07-29-2003, 02:54 PM
I set my radiator to stage 2 and try to keep my throttle below 100% unles I have to. In a dive I will close it.The nice thing about having a stick that is very programmable is that you dont have to keep hitting the keyboard...all the commands are at your fingertips....

<CENTER>http://www.world-wide-net.com/tuskegeeairmen/ta-1943.jpg <marquee><FONT COLOR="RED"><FONT SIZE="+1">"Straighten up.......Fly right..~S~"<FONT SIZE> </marquee> http://www.geocities.com/rt_bearcat

<CENTER><FONT COLOR="ORANGE">vflyer@comcast.net<FONT COLOR>
<Center><div style="width:200;color:red;font-size:18pt;filter:shadow Blur[color=red,strength=8)">99th Pursuit Squadron