Yak 3 handbook.

[lyric1]

Its in french & has lots of drawings.

https://www.scribd.com/document/111244062/Manuel-Yak-3

[save]

Nice find !!

i did a google translate of  page 42.

Do not allow water temperature above 115 ° C for more than 5min. When the water and oil temperatures are above the permitted thresholds, the engine speed can be reduced to 2550 rpm. Maximum oil temperature without time limit must not exceed 110 ° C.

A wep modifier of 5-10  minutes the last 90-100 % of throttle would be welcomed.

Today it's infinite 100%, disregarding not only pilots handbook, and as if every other country pilots gave a darn about their engine with an enemy creeping up their 6 as in current AH.

[Zimme83]

https://en.wikipedia.org/wiki/Klimov_VK-107

The engine was not well liked by either pilots or mechanics – it had a life expectancy of only 25 hours and war emergency power was almost never used for fear of decreasing this even more

(for Yak-9U but i think the wep/non wep debate holds for the -9U too)

[bustr]

Waaaaaaaa, we don't have the reticle mark on the back of the prop for 200m.

[Tilt]

Nice find..........

Any idea which engine model (105 or 107) this manual covers?

[Greebo]

The Yak fighters in AH all used the 105 apart from the 9U that used the 107. There was a 107-powered Yak-3 but it was too late to see service in WW2.

The 105 was derived from the French Hispano Suiza 12Y engine used in many French fighters and was a reliable but not very powerful engine.

The 107 was an all-new design, had a protracted development and was very unreliable when finally introduced into service. Lots of fires and break downs. It had a unusual head arrangement with half the inlet and exhaust ports on the inside of each block and half on the outside. The exhaust ports on the inside of the vee were joined into two pipes which swept round the front of each block to exit as a seventh exhaust pipe on each side of the fuselage.

[Chris79]

A few Yak3 vk107's saw service at the end war unofficially. If memory serves, a soviet fighter squad went down to Tbilisi to pick up standard Yak3s, but took the VK107 model instead.

[save]

Those few Yak3P all had the 107-engine, had  3*20mm, was all metal, and was faster than the LA-7, saw action in Manchuria, had kills according to Russian resources, but never in squadron strength, pretty much like the TA-152.

[Vulcan]

I dunno what the issue is, I find Yak-3s relatively easy to kill, there is less than a handful of pilots that fly them well (except for BTDiver1 who has some sort of kill switch on his internet connection).

[Oldman731]

I dunno what the issue is, I find Yak-3s relatively easy to kill, there is less than a handful of pilots that fly them well (except for BTDiver1 who has some sort of kill switch on his internet connection).

I suspect that the skilled pilots treat the Yak3 the same way as they treat the Spit 16:  It isn't a challenge, fly something different.

- oldman (except when you're getting vulched, then all bets are off)

[save]

The spit16 i can fly away from in a 190a5/8 at the deck, not the Yak3 -infinite Wep

[hgtonyvi]

The spit16 i can fly away from in a 190a5/8 at the deck, not the Yak3 -infinite Wep

oo this plane needs to be perked.

[Vulcan]

The spit16 i can fly away from in a 190a5/8 at the deck, not the Yak3 -infinite Wep

Yaks have no WEP. All engines had their limits, especially some like the Allisons, early Merlins, Griffons, and Sabres. If you applied the same logic then pretty much every aircraft AH would need its engines detuned.