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ytareh
03-24-2007, 06:03 AM
I know that most planes have a fairly long overheat limit, (3-6 minutes ?)
However is that for an in mission total or does it have to be continuous?(Or is it modelled in some more complicated way)If youre overheating and opren rad flaps to cool down do you get to restart the clock so to speak?
Thanks.
Any links to overheat times handy?I used have them somewhere....

ytareh
03-24-2007, 07:54 PM
Anybody able to clear thsi up for me?
Also once you hear the porked engine sound even though cooling may return to normal theres nothing you can do ,right?

badatit
03-24-2007, 08:47 PM
I dont think the clock stops.

If you just get it hot and cool it down quickly, OK.

Let it stay hot, too long and cool it down quickly, you should notice a slight to moderate reduction in power/speed.

If it stays hot long enough that you start to hear damage, noisy bearing etc. Your on borrowed time. It'll get worse and worse, until your engine seizes up.

I spent many hours testing this in the P51D.
If your not carefull, you "can" damage this planes engine on the ground while it's cool.

It helps to let it warm up a bit, and easy on the throttle, till your roaring down the runway.
I imagine most (if not all) are like this.

badatit
03-24-2007, 08:55 PM
Sound plays a major role here.
If you crank up the volume, you be supprised by the intricate, subtle changes in the engines, under different conditions.

I was quite impressed by it. But I had to turn it back down. I have enough hearing damage already.

FritzGryphon
03-24-2007, 09:01 PM
There's no cumulative effect so long as you cool the engine before the damage occurs.

So you could, for example, run 110% and overheat for 6 minutes, shock cool until the overheat message goes away, then back up to 110% for another 6 minutes.

I did a long distance speed test in the 109K once. Over a 22 minute flight, I managed 20 minutes of 110% power with MW50. 5 minutes of WEP at a time, with a 30 second cool down period between.

So long as you keep an eye on the stopwatch, you can run WEP for almost an entire mission. Keeping in mind that changing conditions (speed, altitude, ambient temp) will alter the time to breakdown.

I've tested breakdown times in previous versions, but I don't think the numbers are relevant in 4.08. From 6 minutes in 109, to 8 minutes in La-5FN, and 10 minutes for P-47 (times from overheat message, 110% power, 1000m altitude, crimea noon, rad closed).

A little bit of testing will go a long way in squeezing the last bit of energy out of your plane. Especially for 1v1 same plane dogfights or air races, where a 1% difference will decide winner and loser.

jermin122
03-24-2007, 11:40 PM
There does be a cumulative effect.
And you can't run MW50 for almost an entire mission because it has a 26-minute limit.

Vike
03-25-2007, 07:08 AM
Originally posted by badatit:
Sound plays a major role here.
If you crank up the volume, you be supprised by the intricate, subtle changes in the engines, under different conditions.

I was quite impressed by it. But I had to turn it back down. I have enough hearing damage already.

I agree http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

I saw this once too,while i was adjusting the best RPM to engage the MW50 on a Me109-Late.
At the moment,i thought it was ok,but like you,i heard a very little/small/slight noise difference,almost un-noticeable but for a regular Messerschmitt flyer "als mich",i decided to verify.

i put up the Wonder-woman view to see the TAS.
I couldn't reach the usual top speed,by a decrease of 15 or 20 km/h TAS! http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

Quite impressive indeed,to see how sensitive a enigine could be,as IRL finally! http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif.

This sim is ABSOLUTELY well done http://forums.ubi.com/images/smilies/11.gif


Originally posted by jermin122

And you can't run MW50 for almost an entire mission because it has a 26-minute limit.

By disengaging it and by using it a the right times,you should be a flying threat for more than 26 minutes! http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

@+

VW-IceFire
03-25-2007, 07:45 AM
Originally posted by ytareh:
Anybody able to clear thsi up for me?
Also once you hear the porked engine sound even though cooling may return to normal theres nothing you can do ,right?
If you start hearing the engine chewing on metal then thats when you've done damage and cooling it off won't help much...it might prolong things. Particularly if its a radial engine. You can get around with a screeching radial engine for quite a while...just with reduced power.