View Full Version : Radiator

09-18-2003, 09:21 PM
What situations while flying call for use of the radiator?

09-18-2003, 09:21 PM
What situations while flying call for use of the radiator?

09-18-2003, 09:27 PM

It just depends on how hot your engine is how much you have to open it.


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09-18-2003, 09:31 PM
Thats what I thought, so when your engine is getting hot/ almost to over heat you are gunna want to open the radiator?

09-18-2003, 09:33 PM
or you could leave it on auto [german aircraft only]

09-18-2003, 09:33 PM

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09-18-2003, 09:40 PM
Though you should be aware of the speed penalty for using the radiator (apprx 50km/h on bf-109). Its best used in climbs or turns, where speeds are low and the radiator drag is minimal. At high speeds it acts like an air brake, and can ruin your day if you're trying to outrun something.

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09-19-2003, 03:57 AM
for 190As - no reason to ever open radiator, you go much faster without overheating by lower throttle/close radiator than higher throttle/open radiator. If you have had the overheat warning on for awhile and need to cool down quick before engine damages, then opening radiator will help.

for 109s - my experience with these planes is that they are oil temperature limited rather than coolant temperature limited. The flap for the oil cooler never opens so fiddling with radiator settings will not help. If you are overheating then opening radiators will not cool you faster, because it only cools the coolant and it is the oil that is too hot.

for 190Ds - I think these are like 109s, but havn't tested them since 1.11.

LA5, LA5F, LA5FN, LA7 - these are like 109s in that opening the radiator does you no good. In this case it does cool the oil, but there is another temp guage below it (I assume head temp) that does not change by opening radiator, so opening it does you no good.

09-19-2003, 04:01 AM
VOL_Jon wrote:
- or you could leave it on auto [german aircraft only]
Does that really work? I was wondering.....

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09-19-2003, 04:44 AM
You're much better off at 100% with the radiator closed instead of 101+ with it open.

SSgt Tim Schuster
8MXS Inspection Section
Kunsan AB, Korea

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