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ake109
05-03-2007, 10:13 PM
Is there a reason why the engines on the HG2 can be throttled to 110% while the 1a and 1b versions only get 100%?

I read in another thread that the HG2 actually gets the HeS011 turbines (despite what is in the aircraft viewer) but I don't think that is true since the engine RPM for the HG2 (about 9000) and Ta183 (about 10000) is quite different.

Thanks.

DKoor
05-03-2007, 10:22 PM
Haven't checked but I doubt that is important fact anyway. 110% never existed IRL anyway. IRL we can move to 100% only http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif
I always say that the Spitfire is one of the most correctly modeled planes in sim http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif
Can move only to 100%.

Nimits
05-03-2007, 11:23 PM
Well, 110% in prop planes represents WEP; not sure what it would be for a jet . . . afterburner?

Taylortony
05-04-2007, 01:37 AM
The way jet engines are they do go to 110% on some engines, this is correct......

The Conway of my memory serves me was rated at 104%

StG2_Schlachter
05-04-2007, 03:50 AM
Jet engines on modern airliners can be over-reved. This is done if the airplane is performing a short and/or high altitude take-off or is heavily loaded.

MEGILE
05-04-2007, 03:59 AM
Originally posted by DKoor:
Haven't checked but I doubt that is important fact anyway. 110% never existed IRL anyway. IRL we can move to 100% only http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif
I always say that the Spitfire is one of the most correctly modeled planes in sim http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif
Can move only to 100%.

LOL don't let the federation of Spit-Doubters hear you say that

ake109
05-04-2007, 10:17 PM
OK. So anyone knows why the programmers allowed the same engine on the HG2 to overrev compared to the 1a?

Its an almost useless feature anyway. At 100% they already overheat so fast on 4.08 (compared to the original FB model I started with). I can never get it to last more then a few seconds on 110% before the engines threaten to pack up.

GreyFox5
05-04-2007, 10:27 PM
Its like turning your Amp to 11 http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

WilhelmSchulz.
05-04-2007, 10:45 PM
Why do the German jets catch fire when you throtel up too fast?

ake109
05-04-2007, 10:50 PM
Originally posted by WilhelmSchulz.:
Why do the German jets catch fire when you throtel up too fast?

Too much fuel gets dumped into the combustion chamber and the early jets had no engine management system to regulate it.

Abbuzze
05-05-2007, 02:18 AM
If I remember correct the BMW engine of the He162 had an overboot option - with the need of an overhoul after using it.

Sergio_101
05-05-2007, 08:41 PM
In a modern gas turbine, and some of those old ones,
it was allowed to exceed the max RPM by as much
as 10%.
What was not allowed was to exceed the max TIT.
Excessive TIT (turbine inlet temprature) would
result in major damage or catastrophic failure very quickly.

All gas turbines are governed. If there was
no govenor the engine would run away till
it failed or ran out of fuel or air.

I worked C-130's for 5 years, the engines at that time were
T-56A-7 or T-56A-15 turbo props.
We were governed to +-2%. The pilot had
no control over RPM at all in flight.
We did have a 70% ground idle capability
that cut fuel consumption in half while
sitting still or taxiing.
The T-56 is a single spool turbine.

P&W J-57s were different, as I remember it they could
be run at over 110% RPM with no damage.
J-57 is a dual rotor/spool design.

In a dual rotor engine the two shafts can and
are running at two different RPMS.

Sergio

LStarosta
05-05-2007, 10:08 PM
There can never be excessive TIT. http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

Grendel-B
05-06-2007, 09:30 AM
Originally posted by ake109:
OK. So anyone knows why the programmers allowed the same engine on the HG2 to overrev compared to the 1a?


Because it is not the exactly same engine? Perhaps the developers gave some consideration for the improvements in the Jumo 004 engine that were done during the war? The later variants of 004 had much improvements when compared to the early versions, later versions also lasted longer on operational use and could be used longer between overhauls.

ake109
05-06-2007, 09:46 AM
Originally posted by Grendel-B:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by ake109:
OK. So anyone knows why the programmers allowed the same engine on the HG2 to overrev compared to the 1a?


Because it is not the exactly same engine? Perhaps the developers gave some consideration for the improvements in the Jumo 004 engine that were done during the war? The later variants of 004 had much improvements when compared to the early versions, later versions also lasted longer on operational use and could be used longer between overhauls. </div></BLOCKQUOTE>

Well, it could be a different version of the 004 (I would have liked the 004D?, the afterburning version) but the aircraft viewer says its a 004B (identical to the 1a).

Keeping it to 100%, it seems to overheat as easily as the 1a too.

Cajun76
05-06-2007, 12:11 PM
Originally posted by Sergio_101:
In a modern gas turbine, and some of those old ones,
it was allowed to exceed the max RPM by as much
as 10%.
What was not allowed was to exceed the max TIT.
Excessive TIT (turbine inlet temprature) would
result in major damage or catastrophic failure very quickly.

All gas turbines are governed. If there was
no govenor the engine would run away till
it failed or ran out of fuel or air.

I worked C-130's for 5 years, the engines at that time were
T-56A-7 or T-56A-15 turbo props.
We were governed to +-2%. The pilot had
no control over RPM at all in flight.
We did have a 70% ground idle capability
that cut fuel consumption in half while
sitting still or taxiing.
The T-56 is a single spool turbine.

P&W J-57s were different, as I remember it they could
be run at over 110% RPM with no damage.
J-57 is a dual rotor/spool design.

In a dual rotor engine the two shafts can and
are running at two different RPMS.

Sergio

I was a turbohead for 9 years in the USAF. http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

luftluuver
05-06-2007, 01:28 PM
Originally posted by ake109:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by WilhelmSchulz.:
Why do the German jets catch fire when you throtel up too fast?

Too much fuel gets dumped into the combustion chamber and the early jets had no engine management system to regulate it. </div></BLOCKQUOTE>The Jumo 004B had an engine management device, at least for engine rpms over 6000.