Overheating of the La5

[sturmkraehe]

Any info about heating issues on the La5 series 8?

 

I for my part have the impression that it overheats extremely quick compared to other planes (fighters). One has to run it at 75% in order not to run into problems too soon without opening the darn engine cowlings that kill all advantage of highter thrust. That is the cowlings destroys all speed advantage provided by higher thrust imho. Makes this plane highly uncompetitive and its said max speed quite theoretical because only achievable for a few seconds.

 

While I recommend to buy the 190 I cannot recommend the La5 because it does not provide any real advantage and is likely only for La5 lovers.

Edited November 19, 2014 by sturmkraehe

[SvAF/F19_Klunk]

Thanx mate.

In regards to recommendations of purchase.... Are we to buy only planes that gives us an advantage? I for one, with a genuine interest in aviation, would LOVE to see crapplanes on the pricelist in the future.. Planes that not necessarily gives an advantage to the pilot, but rather gives another challenge and experience. i would gladly pay for a flyable tante ju

[=38=Tatarenko]

I think the art lies in cooling it before combat then you have quite a long period of very high power.

[Crump]

Any info about heating issues on the La5 series 8?

 

I for my part have the impression that it overheats extremely quick compared to other planes (fighters). One has to run it at 75% in order not to run into problems too soon without opening the darn engine cowlings that kill all advantage of highter thrust. That is the cowlings destroys all speed advantage provided by higher thrust imho. Makes this plane highly uncompetitive and its said max speed quite theoretical because only achievable for a few seconds.

 

While I recommend to buy the 190 I cannot recommend the La5 because it does not provide any real advantage and is likely only for La5 lovers.

 

That actually sounds consistent with the La-5 series Pilot Operating Instructions.

 

The aircraft had very large cooling gills that had an extreme effect on the attainable top level speed (Vmax).  As long as it is not abused by excessive power settings in cruise flight, it should produce a reasonable time of good performance.

 

[sturmkraehe]

The thing is: Taking off full power already rockets the temperature to about 80°C and more. 85% thrust brings her to nearly 100°C. 

[Crump]

 

 

Taking off full power already rockets the temperature to about 80°C and more. 85% thrust brings her to nearly 100°C.

 

Which temperature?

 

The normal operating range for CHT is 140 C to 205C with a maximum of 215C.  Oil inlet temperature range is 50C to 75C.

[6./ZG26_Klaus_Mann]

I'm OK with 100% Power with Inlet 80-100%, Oulet 25-30% and 80-100% Oil.

Radials have large Cowling Flaps simply due to the fact that the Temperatures in the engine differ far more than in a water-cooled engine. You have to actively work the Cowling Flaps as part of managing engine.

[6./ZG26_Klaus_Mann]

Correct that: 530 kph at 0%Outlet, 50% Oil, 60% Inlet.

Edit, just reduced inlet to 50%, still no overheat.

Get a solid 540 now

Edited November 19, 2014 by myfabi94

[Crump]

Radials have large Cowling Flaps simply due to the fact that the Temperatures in the engine differ far more than in a water-cooled engine.

 

The La-5's are unusually large variation even for a radial engine.  The Vmax varies up to 50 kph due to the flaps.  Most radial installations will vary roughly half of that or even less. 

Edited November 19, 2014 by Crump

[Crump]

myfabi94

 

Many radial engine installations instruct to keep the cowl inlets closed except for unusual conditions.

 

A Focke Wulf pilot following the Flugzueg handbuch instructions would leave the cooling gills closed on his FW-190 during the Russian Winter......

 

He should never have to open them.

[SAG]

Ok just did some testing with full tank, full MIX, full ammo at 400M above ground

 

 

Correct that: 530 kph at 0%Outlet, 50% Oil, 60% Inlet.

Edit, just reduced inlet to 50%, still no overheat.

Get a solid 540 now

 

 

this is my layout :

 

IN ---OUT ---OIL ===TEMP ---SPEED:

 

60---0---50===95(after a loooong time, overheat)----540kph

 

 

i was able to get the same speed without overheating (ever) with the following settings

 

80in----0out----50oil==80temp(stable)----540(535)KPH

 

 

this is flying in a straight line of course so combat situation speeds and temps might differ, just tested so we could get an idea. 

 

hope it helps!! 

 

Cheers!

[sturmkraehe]

myfabi94

 

Many radial engine installations instruct to keep the cowl inlets closed except for unusual conditions.

 

cooling gills3.JPG

A Focke Wulf pilot following the Flugzueg handbuch instructions would leave the cooling gills closed on his FW-190 during the Russian Winter......

 

He should never have to open them.

 

Interesting. Thanks, Crump. Do we have ingame capability to set inlet for 190? I think it is only for La5 right now.

[Crump]

Do we have ingame capability to set inlet for 190?

 

 

No I do not think so and that is correct.

 

The FW-190A3 did not come with adjustable "cooling gills" as they outlets were called.  Later, when the adjustable gills came out, FW-190A3 airframes could be retrofitted with them.

 

It is also correct that the FW-190A3 comes with and without outboard wing weapons.  This option disappears in the FW-190A5 and above IAW the ladeplan for fighter variants.

 

[Crump]

 

 

Thanks, Crump.

 

You are very welcome!