109F2 Radiator Flaps

[Brizzly]

Just a quick question about this:  do they work the same as the F4, or is there something I'm doing wrong?  It seems that the water radiator flaps only have two settings, auto/full open, and there is no manual control of the oil radiator flap.  I can confirm that I have normal control of the 109E, F4, and G, but just wanted to make sure this was how the F2 is supposed to work, unless I just have to bind something else.

[Kurfurst]

The oil cooler has only automatic settings on the real plane. IMO the water radiator should have the same settings as on the later planes (i.e. 4 settings: AUTO, Opening fully, Closing fully, and Fixed/OFF in current position), unless I missed something and the F-2 was somehow different.

[NachtJaeger110]

It seems that the water radiator flaps only have two settings, auto/full open, and there is no manual control of the oil radiator flap.

 

That is how it's supposed to work in the F2, you're doing nothing wrong As opposed to the E7, F4 and G2 the F2 offered much less control over radiators by design.

[Brizzly]

Cool, thanks for the help.

[Brizzly]

I'd like to correct my initial assessment:  it seems that there are only two settings, full open, and full closed.  Definitely a pain.  I haven't blown an engine yet due to temperature, but it makes me nervous in a dogfight when I close them to get some speed, and the oil temp shoots right up to 80.  I'm playing a PCWG campaign on the Stalingrad map, so it's cold, I know, but I haven't seem them open even a little on their own, so I'm assuming the default at start is closed, and when I press the button to turn off auto flaps, they open completely.

[unlikely_spider]

I'd like to correct my initial assessment: it seems that there are only two settings, full open, and full closed. Definitely a pain. I haven't blown an engine yet due to temperature, but it makes me nervous in a dogfight when I close them to get some speed, and the oil temp shoots right up to 80. I'm playing a PCWG campaign on the Stalingrad map, so it's cold, I know, but I haven't seem them open even a little on their own, so I'm assuming the default at start is closed, and when I press the button to turn off auto flaps, they open completely.

Just curious - which squadron lets you pick an F-2 during winter? From what I saw, most if not all have moved to the Gustav or FW by winter. I like flying the F which is why I'm asking.

[LukeFF]

 

 

I'm playing a PCWG campaign on the Stalingrad map, so it's cold, I know, but I haven't seem them open even a little on their own, so I'm assuming the default at start is closed, and when I press the button to turn off auto flaps, they open completely.

 

Enable Technochat, and you'll see what the radiators are doing.  

[Brizzly]

Thanks for the tip Luke.  As for the squadron, I'm flying for I JG 3 stationed at Malogolubaya 10/01/1942.

[JtD]

According to the manual the oil cooler was "auto" only, the radiator had "open" and "auto" as options. Basically the "open" position is pretty much an "off", because the flaps get opened up by the air stream.

[Brizzly]

According to the manual the oil cooler was "auto" only, the radiator had "open" and "auto" as options. Basically the "open" position is pretty much an "off", because the flaps get opened up by the air stream.

Not sure if that is correct...the faster you are moving, the less they would need to be open (relative to engine power being utilized).  The auto position should be a function of water temperature.

 

Edit:  Finally had a chance to test this further, and can confirm (for myself, and anyone who cares) that the options for the F2 are auto/open only.  I tried it on the Moscow map in autumn, hoping that I would see more movement in the auto mode with a higher OAT.  I could see a lot more movement in the radiator flaps in the auto mode here at higher engine power, and lower airspeeds.  It seems to do a good job of keeping the water temp down, but the oil temp stays right at 80 degrees.

Edited June 6, 2016 by heloguy

[JtD]

Not sure if that is correct...the faster you are moving, the less they would need to be open (relative to engine power being utilized).  The auto position should be a function of water temperature.

I said "open" would mean pushed open by the air stream. Auto is temperature regulated. Also, open doesn't mean the open further up as you go faster, it's just that if you're on the ground and not moving, they probably shouldn't open up at all. Once you're up in the air, they'll be pushed open at some point and stay like that. It's just emergency operation in case the thermostat fails.

[Kurfurst]

According to the manual the oil cooler was "auto" only, the radiator had "open" and "auto" as options. Basically the "open" position is pretty much an "off", because the flaps get opened up by the air stream.

 

Which manual reference is that?

[JtD]

Bedienungsvorschrift May 1941 (all auto, but emergency operation wihere pressurized oil opens rads), Kurzbedienungsanleitung January 1941 (all auto, but emergency operation where air pressure opens rads), Flugzeughandbuch May 1941 (bit more detail on automatic regulation, no mention of emergency operation). IIrc, BoM tried to model after the Kurzbedienungsanleitung. Anyone's invited to look through the dev diaries.

[Kurfurst]

I tried to look it up on the FHB from Mai 1941, but its a rather large volume. Can you specify the page?

[JtD]

On page 31 in sections e) and h) you have a description of the regulation. Another bit is written on 33, 9. and 10. Emergency operation is mentioned on page 53, bottom (Notzug für Thermostat), but no mention of what it does. In Anlage 7, 2nd page you can see the emergency handle for the thermostat.

It looks to me as if a detailed description of the hydraulics and/or thermostat are not included in the FHB.

[Brizzly]

In game, it seems to be the Bedienungsvorschrift, as they will open all the way if you take them out of auto, even if idling on the ground.