ok, i check it for fun again, and...


quote from this "great" post, about yak-3 -

(Як-1М М-105ПФ2 ("Дублер") - prototype of yak-3, 16-17 sec of turntime)...


and NOW, what written in this book - (well - 18-19 sec for yak with some defects and not normal quality from special tests)...

and, finally - :grin:

plus, just logic - HOW yak-3 can EASY outturn captured, "light" a-8 with 4000 kg (+ 1.58 ata?) and with 21 sec, if he self "have" 20-21 sec?!:)


so...

normal serial yak-3 it's - 2629 - 2692 kg (2722.44 in 4.11) and 17-18 sec (20.21 (!) sec in 4.11)...

with speed and climb (with climb, maybe) all good, how i see...


plus, important thing - 2 (before 13 serie) and 3 (after 13 serie) guns - or -
%, of normal yak-3s, can be similar with this (but yak-9u have more serious problems... and - again - about work of военная приемка) -
and - if we remember situation with la-7 - here all can be similar too...

plus - if this etalon for production (don't know, maybe no), 590 (nominal) + 35 (forsazh, can + 40, because better aerodynamics) = 625 km/h at SL for normal la-7 (prototype, 597 (1015 mm) + 35-40= 632-637... well, 635 in middle)...

well, something like this... maybe with la-7 and 625 i'm wrong, maybe no...


+ for thinking, other part of "справочник основных данных самолетов" (attached)...

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

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.

You have a link to those Polish reports?

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...

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...:)

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.

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.

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

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;))...

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...

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...

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...

"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)...

well, maybe here you are right - how i hear, damage of 7.62x54r for shkas (or just "of shkas") in game too low, compared with mg-17...

why, don't know... balance etc, maybe... or just mistake...


about berezin 12.7 mm, and shvak - maybe, 12.7 mm should be little more powerfull (not sure)... shvak, in total, not so powerful like mg151/20 or hispano - so, all good here (attached, hits in wing of 109, famous picture and very similar with game, i think)...

but, if for game in future DT include more planes etc for soviet-japanese war'39 (халхин-гол/номонган) and soviet-finnish winter war'40, for shvak of this period (for i-16p etc) need create new shell with 2-3 g of HE (something like this, forgot correct weight of HE now, and in total early shell for shvak very similar with HE-shell for berezin 12.7 mm)...

maybe, i'm little wrong, too long ago i read info about this...

Soviet 12.7mm should be much more powerful than now. It was far superior to the Browning .50, and almost at the level of the MG151/15. But ShVAK & B20 should be weaker. It had quite low HEI content for the total weight of the projectile.

http://www.quarry.nildram.co.uk/WW2guneffect.htm

compare with what?

well, maybe, .50 too good (i remember here, before some patch .50 was more powerful), but berezin and mg151 very similar and not bad, and mg151 little better... what REALLY wrong here, ub vs. mg151?

mg151 - 2-4,5 g of HE, 960 m/s, 700 shots in min...

ubs - 2-4 g of HE, 860, 700-800...

AP of mg151 little better, especially, "H-Pzgr"...

and? i don't see here any really "wow" in compare with 15 mm, similar guns, but of course it's really good weapon (like in your link - "The gas operated UB was the best gun of its class, lighter (21kg) and faster firing than any other guns with similar ammunition performance.") - and remember this if you want start talking about "bad" soviet weapon of fighters:), for example, "only ubs and shvak" (+ this is why i'm talking about differences of yak-7b without gargrot and yak-9, and about yak-3 before 13 serie)...


+ interesting thing about effectiveness - you know materials of german fighters?;)

now shvak weaker than mg151/20, hispano and vya-23, where you see problem here? or it's like what you written here usually?:)

and mg151/20 better mainly with "miningeschoss", but this special shell and not so obviously, what, mg really more better with this wunderwaffe than shvak (don't want write here now some rumors about this), and other german shells very similar with shvak shells in fact...

early HE shell for shvak (before 40-41) - 2.75 g of he...

late HE shell for shvak (after 41) - 5-6 g of he...


well, i think, maybe need some little corrects, but general problem - all 20mm guns like lasers...

second problem - 37 mm shells of ns-37 and m-4 (maybe, 30 mm too) not so deadly (too much "blank hits" of HE shells without any damage, sometimes help only AP hits... remember, for first yak-9t ONLY he shells, and later can only he too sometimes... and? you understood?:))...

maybe, something more...


+ about n-37 and yak-9ut (i can't find time for read this book) -