Soviet fighters and 4.12

[gaunt1]

Originally Posted by X-Raptor

I agree 100% with you and your opinion jermin about incorrect and uber FM of LA 5 -LA 7 Yak and LAGG Soviet Planes Ingame.

Well, the FM of all Lavochkins are really nonsense, but Yaks arent that bad, especially those with the VK-105. Yak-9T&K are overmodeled, true, but as far as I know the 1942 model Yak-9 and the Yak-9D have one of the most realistic FMs in the sim.

Bear in mind that Russian engines are historically unreliable and easily overheating.

ASh-82 engines were quite reliable in La-5. But yes, some engines, like the VK-107 were terribly unreliable and overheated quickly even @ normal operation due to poor quality seals and bearings, and poorly constructed oil pumps. In addition to that, it was very risky to run them @ WEP, engine seizure could occur at any minute, if not any second. A while ago, I did a little test, I was flying a La-7 against a Yak-9U, I quickly scored a hit on its engine, which started to emit black smoke. The Yak flew more than 5 minutes without any signs of reduced performance (I didnt shot it down to test the endurance of its engine), and it caught fire about a further 5 minutes later.

[1984]

Originally Posted by gaunt1

VK-107

again, special for you (at first time, about yak-9u... or you, maybe, start find and read self?) -

С июня 1944 года на истребитель Як-9У на аэродроме Волосово начал переучиваться личный состав 139-го гвардейского 303-й иад. Об эксплуатации Як-9У с моторами BK-107A сохранилось очень мало информации, и, когда заходит речь о двигателе, то главным его дефектом называют низкий ресурс, до выработки которого в строевых частях они обычно не дотягивали. Одной из причин этого было плохое знание техническим персоналом материальной части и соответственно не грамотная его эксплуатация. Чтобы не быть голословным, отмечу, что в 139-м гвардейском иап моторы нарабатывали по 115 часов, вместо гарантированных 100 часов. Это стало возможным, благодаря упорному труду мотористов полка.

[gaunt1]

Please write in english. Im sure not everybody understands russian here (like me). Google translate helps, but it is still quite bad.

About the VK-107, that report with 115 hours in the engine is a big lie. Average engine life was around 20-25 hours for the WW2 version (but only if the pilot didnt use WEP). Of course it was unacceptable, so after the war, some improvements were made, but it had little effect, engines rarely reached 40 hours. Post WW2 reports from Poland, Yugoslavia and Hungary indicate that these engines needed excessive amounts of maintenance, and still they were terribly unreliable, some of them developed engine seizure after only 10-15 hours without using WEP for even a minute! And these were the post-war updated engines.

[Woke Up Dead]

Originally Posted by gaunt1

Post WW2 reports from Poland...

You have a link to those Polish reports?

[1984]

Originally Posted by gaunt1

Please write in english. Im sure not everybody understands russian here (like me). Google translate helps, but it is still quite bad.

i'm not translator of quotes on russian language...

if you mean my bad english... well... apart my "sorry" in many posts, i think, even perfect english not help you to understand what i'm write, and not help you to start read the right books before writing, if you really not want do all this...

just my long-standing observation...

About the VK-107, that report with 115 hours in the engine is a big lie.

oh, again... and again, "stream of consciousness"... now like dude with "only 2 min forsazh" and with not russian compilations...

maybe, you want say your opinion for author, techs and pilots of GIAP personally?


and, you want to say something more about my last posts?

especially, about "mythical", "abnormal" and "hugely overmodelled" yak-3...

[gaunt1]

Originally Posted by 1984

if you mean my bad english... well... apart my "sorry" in many posts, i think, even perfect english not help you to understand what i'm write, and not help you to start read the right books before writing, if you really not want do all this...

No, I dont have problems with your english. The problem is that you quote lots from russian pages, and its hard to understand those with google translate.

maybe, you want say your opinion for author, techs and pilots of GIAP personally?

Soviet reports from the fields were often quite exaggerated, mainly due to patriotism. And this "115 hours" is another example of this.

About flight performance data, I think TsAGI reports are the most authentic.

Originally Posted by Woke Up Dead

You have a link to those Polish reports?

Unfortunately no, I read it in an old magazine.

But every source states that average engine life was only 25 hours for the WW2 version. Post war improvements extended the engine life by about 10 hours.
http://en.valka.cz/viewtopic.php/t/54647

Another interesting fact:

...impossibility to use the "combat mode" (3200 rpm, the nominal mode was 3000 rpm) of the engine due to its unreliability.

http://mig3.sovietwarplanes.com/yak3...yak3vk107.html
You can read the same here too:
http://www.kamov.net/russian-aircraft/yakovlev-yak-9p/

[1984]

Originally Posted by gaunt1

No, I dont have problems with your english. The problem is that you quote lots from russian pages, and its hard to understand those with google translate.

oh, russian quotes... i understand... but... PLS, don't make me laugh... HOW you can know more, without problems and without work?! без труда не вытащишь и рыбку из пруда, old russian saying...

plus, all this it's not light work and i how can, do this for fixes, some users here who want to know and for myself too, of course...

well, no any other ways for you to REALLY know (and try feel youself, like me and half of the world, when i search datas)...

Soviet reports from the fields were often quite exaggerated, mainly due to patriotism. And this "115 hours" is another example of this.

what you talking about? patriotism?! patriotism it's songs etc, maybe, some instructions and recommendations, but technical datas and tests it's serious science and knowledge...

maybe you mean some errors, it's can be, but again - it's all seriousness and be analyzed...

so, your words it's like "водка, матрешка и балалайка"... i sure, you not think what first sputnik and first man in space it's just JOKE and mainly patriotism too... right?

and i again can only recommend try to understand my quotes from sources...

About flight performance data, I think TsAGI reports are the most authentic.

TsAGI reports not main source, it's just science, mainly, like tests of p-47 (what is this, new features etc)... lot of important things (about control tests etc), i posted in la-7 topic...

Unfortunately no, I read it in an old magazine.

But every source states that average engine life was only 25 hours for the WW2 version. Post war improvements extended the engine life by about 10 hours.

i given you serious opinion - not from other user from here, it's author of book - about not simple situation with vk-107 and other REAL results (i and all authors not say what vk-107 not have problems, sometimes very serious, maybe was be better if author of engines finalized vk-106... but remember, Korea, yaks and very powerful p-51s... well, not simple question)...

and if you not belive, sorry, it's only your problems of faith, and for datas it's not have any attitude...

anyway, just "no way" it's not answer and not constructive...

+ need to understand, books is not internet and magazines with lot of easy edits, and have errors... and we have NEW info sometimes...

Another interesting fact:

"interesting fact" - without context and continuation, but if you not want read and understand original texts, i not really can help here...

(if shortly, i can say later some problems for serial yaks was solved and yak-9u in war can use 5 min of combat power with normal radiators settings... some problems was here, of course, ussr reality and new powerful engine - remember, pls, it's 1650 hp and remember, how long even germany have blocked 1450 hp and have problems with 1310 hp - but we just can't know all truth from original users of vk-107, needed serious works in archives AND for publics (i think, i know one book, small printing, and want buy it with wow price someday), and some strange compilations and old info it's not nice here... and IMMEDIATELY after war it's not war - different situations, no voltage of total war=more low quality, than in war, and f.e., manual for la-9 can give 5 min forsazh because for engine need to work of all time of resource=not so much accidents and more live pilots, well, it's not war... etc etc etc)...