4.11 - Engine: Overheat!

[MadBlaster]

ok 109. my mistake.

Comparing water cooled inline engine planes to air cooled radial engines all different planes with different designs and cooling efficiencies modeled. It was already pointed out in this thread that oil temp is function of "oil in" and "oil out" and those functions are all dependent on map pressure, rpms, fuel mixtures, airspeeds and radiator/cowling positions (open, partially opened or closed) and for water cooled engines would be dependent on efficiency of the in/out of the water temps (so if you take a bullet damage there you should be more prone to overheat!) and air-cooled on the heat exchangers/oil sump/pump and don't forget the ambient temp of the map. If your able to capture all those dynamic functions in a stop watch run and draw a reasonable conclusion???

[Treetop64]

I don't want to come off as self-promoting, but I posted this in another thread and thought it would be worthwhile to post here, too:

"Generally speaking, to get the most performance out of any engine in the sim for the longest practical time, you want to set a high manifold pressure, combined with a moderately reduced RPM, and as high a mixture as practical for a given altitude. Also, you may want to open the radiator one or two steps. Moreover, you want to fly in a manner that keeps your speed as high as possible - the more air that is blasting into the radiator for liquid-cooled engines, and through the cylinder head fins for air cooled engines, the cooler your engine will run. Again, this is a general rule of thumb for managing engines during combat in the game.

Can't stress this enough, but I highly recommend turning off HUD messages, and get used to reading the gauges to monitor the engine. With v4.11 you can do that with confidence now that the gauges show what they should show. I've said it many times and I'll say it again: the triggering of the ENGINE OVERHEAT message is way too conservative. I've long flown without HUD messages and have paid close attention to the gauges, and have gotten good performance out of the engines on warm and cold maps. Once I turned on HUD messages however, I found that the ENGINE OVERHEAT message came on far sooner than I would have otherwise started worrying about the condition of the engine. I just turned it off again and haven't used it since. If I used the ENGINE OVERHEAT message as a guide to start trimming back on engine settings, I would never get any decent performance out of the machine.

Learn to use the gauges, throttle, RPMs, manifold pressure, and radiator; not be a slave to the OVERHEAT message; practice consistently, and I promise you will get more performance out of your plane."

[MadBlaster]

Originally Posted by treetop64

i don't want to come off as self-promoting, but i posted this in another thread and thought it would be worthwhile to post here, too:

"generally speaking, to get the most performance out of any engine in the sim for the longest practical time, you want to set a high manifold pressure, combined with a moderately reduced rpm, and as high a mixture as practical for a given altitude. Also, you may want to open the radiator one or two steps. Moreover, you want to fly in a manner that keeps your speed as high as possible - the more air that is blasting into the radiator for liquid-cooled engines, and through the cylinder head fins for air cooled engines, the cooler your engine will run. Again, this is a general rule of thumb for managing engines during combat in the game.

Can't stress this enough, but i highly recommend turning off hud messages, and get used to reading the gauges to monitor the engine. With v4.11 you can do that with confidence now that the gauges show what they should show. I've said it many times and i'll say it again: The triggering of the engine overheat message is way too conservative. I've long flown without hud messages and have paid close attention to the gauges, and have gotten good performance out of the engines on warm and cold maps. Once i turned on hud messages however, i found that the engine overheat message came on far sooner than i would have otherwise started worrying about the condition of the engine. I just turned it off again and haven't used it since. If i used the engine overheat message as a guide to start trimming back on engine settings, i would never get any decent performance out of the machine.

Learn to use the gauges, throttle, rpms, manifold pressure, and radiator; not be a slave to the overheat message; practice consistently, and i promise you will get more performance out of your plane."

qft!

[Aviar]

Originally Posted by Treetop64

I don't want to come off as self-promoting, but I posted this in another thread and thought it would be worthwhile to post here, too:

"Generally speaking, to get the most performance out of any engine in the sim for the longest practical time, you want to set a high manifold pressure, combined with a moderately reduced RPM, and as high a mixture as practical for a given altitude. Also, you may want to open the radiator one or two steps. Moreover, you want to fly in a manner that keeps your speed as high as possible - the more air that is blasting into the radiator for liquid-cooled engines, and through the cylinder head fins for air cooled engines, the cooler your engine will run. Again, this is a general rule of thumb for managing engines during combat in the game.

Can't stress this enough, but I highly recommend turning off HUD messages, and get used to reading the gauges to monitor the engine. With v4.11 you can do that with confidence now that the gauges show what they should show. I've said it many times and I'll say it again: the triggering of the ENGINE OVERHEAT message is way too conservative. I've long flown without HUD messages and have paid close attention to the gauges, and have gotten good performance out of the engines on warm and cold maps. Once I turned on HUD messages however, I found that the ENGINE OVERHEAT message came on far sooner than I would have otherwise started worrying about the condition of the engine. I just turned it off again and haven't used it since. If I used the ENGINE OVERHEAT message as a guide to start trimming back on engine settings, I would never get any decent performance out of the machine.

Learn to use the gauges, throttle, RPMs, manifold pressure, and radiator; not be a slave to the OVERHEAT message; practice consistently, and I promise you will get more performance out of your plane."

How does one "...set a high manifold pressure..."...?

Aviar

[MadBlaster]

Set it to maintain your desired rpm and maybe a little more, not too much or you just generate heat.

[Treetop64]

Originally Posted by Aviar

How does one "...set a high manifold pressure..."...?

Aviar

With the throttle. How you use the throttle determines how much air (hence, oxygen) goes into the combustion chamber with the fuel and is ignited.

[ElAurens]

On an aircraft with a constant speed prop, you set the rpm with the prop control, and the engine manifold pressure with the throttle.

To get a high manifold pressure you would set a low RPM with a large throttle opening.

[IvanK]

Originally Posted by ElAurens

On an aircraft with a constant speed prop, you set the rpm with the prop control, and the engine manifold pressure with the throttle.

To get a high manifold pressure you would set a low RPM with a large throttle opening.

Within limits lest you get detonation

[F19_Klunk]

A good read if you want to know more about engine management, Manifold pressure etc:
http://www.advancedpilot.com/downloads/prep.pdf

[ElAurens]

Originally Posted by IvanK

Within limits lest you get detonation

This is true, but not in the sim.