Yak-3 or Yak-9?

Discussion in 'Aviation' started by cheddar cheese, Apr 12, 2005.

  1. cheddar cheese

    cheddar cheese Active Member

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    Been wondering this for a while now...which was better out of the Yak-3 and the Yak-9?
     
  2. delcyros

    delcyros Well-Known Member

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    I would choose the nimble Yak-3.
    The Yak-9 is much heavier, the air-superiority fighter with long range.
    Original development shows that the Yak-3 origins in the light Yak-1 while the heavier Yak-9 origins in the Yak-7.
     
  3. Nonskimmer

    Nonskimmer Active Member

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    I thought the Yak-9 was essentially a high altitude version of the Yak-3.
     
  4. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

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    I think it's almost like comparing a Spitfire to a Mustang - Ruskie Style!
     
  5. Soren

    Soren Banned

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    The Yak9 was in some ways superior, for one it had a bigger wing-area, meaning better turn rate.

    The Yak3's wing-area was only 14.35 sq.m !
     
  6. blackeagle_I

    blackeagle_I New Member

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    I think there was no high altitude Yak or La fighters in VVS.
     
  7. Anonymous

    Anonymous Guest

    No, because the Yak-9 was heavier and it had a higher proportion of weight in the wings.

    The Yak-9 almost became the more nimble of the two with the Yak-9U all metal design, but then they decided to spend the weight savings on increased fuel capacity and armor.

    In general, I'd say the Yak-3 with the VK107 engine was quite a plane - 447 mph and almost 5K/min climb! But only about 100 saw service in WWII.

    =S=

    Lunatic
     
  8. Soren

    Soren Banned

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    RG generally the Yak-9 had lower Wing-loading, and thats a fact !

    Yak-9T Wing area: 17.15 sq.m / weight = 176.3 kg/sq.m

    Yak-3P Wing area: 14.85 sq.m / weight = 181.2 kg/sq.m

    The only thing that gives the Yak-3 a good turn rate is its superior power-loading.

    However the Yak-9 would normally turn slightly better.
     
  9. Anonymous

    Anonymous Guest

    Now why did you choose the Yak-3P I wonder? Could it be that 3 x B20 20mm and armor of this very late-war variant make it heavy?

    I sure come out with different wingloading figures than you do:

    Yak-3:

    Empty weight = 2,105 kg / 14.85 sq.m = 141.75 kg/sq.m
    Max loaded wt. = 2,550 kg / 14.85 sq.m = 171.71 kg/sq.m

    Both figures are lower than that you've given for the Yak-9.

    =S=

    Lunatic
     
  10. Soren

    Soren Banned

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    *Sigh*............ Yak-3 or Yak-3P whats the BIG difference ? Weight isnt !

    Yak-3 Empty weight: 2,123 kg / 14.85 sq.m = 142.96 kg/sq.m

    Yak-9T Empty weight: 2,289 kg / 17.15 sq.m = 133.46 kg/sq.m

    Yak-3 Max takeoff weight: 2,692 kg / 14.85 sq.m = 181.27 kg/sq.m

    Yak-9T Max takeoff weight: 3025 kg / 17.15 sq.m = 176.3 kg/sq.m

    Now you see ?!
     
  11. Anonymous

    Anonymous Guest

    Here are the weighs I've come up with for the Yak's:

    Yak-3: 2105 kg empty, 2550 kg takeoff, 2659 kg max overload.

    Yak-9: 2770kg empty, 3080 kg takeoff.

    Yak-9P (all metal): 2716 kg empty, 3098 takeoff, 3395 kg overload.

    Emannual Gustin is usually a pretty good source:

    http://www.csd.uwo.ca/~pettypi/elevon/gustin_military/db/sov/YAK3YA00.html (E. Gustin)
    http://www.csd.uwo.ca/~pettypi/elevon/gustin_military/db/sov/YAK9YAKO.html (E. Gustin)

    If you care to dispute his figures, we can contact him and find the sources.

    Below are some more sites supporting these weights.

    http://www.warbirdalley.com/yak9.htm
    http://www.ctrl-c.liu.se/misc/ram/yak-3.html
    http://www.chuckhawks.com/yak-9.htm
     
  12. delcyros

    delcyros Well-Known Member

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    Yakolevs book rates the take off weight of the Yak-3 (1944) with 2652 kg and the Yak-9U (late 1944)with 3104 kg (-sorry no cyrrillic here: A.C. YKOBLEB,ZELb )I(HSNH (Moscow 1976), page 358.) He also says that the Yak-3 was a more agile fighter than the Yak-9 (which could be used for more purposes, thanks to it´s longer range). The ultimate Yak-9 was probably the Yak-9U with VK-107 engine, the original Yak-9 or Yak-9D with VK-105 engine are not that impressive at all.
    I am convinced that the Yak-3 has a better roll rate, too.
     
  13. Soren

    Soren Banned

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    RG his stats aint for the Yak-9T, and usually "Yakovlev's Piston-Engined Fighters" by Yefim Gordon and Dmitriy Khazanov is a good source.

    The Yak-9T weighes 2,289 kg empty, and 3,025 kg with max load.

    Also why did you have to pick the heaviest Yak-9 ? ;)

    Even the late war Yak-9UT weighes no more than 2,550 kg Empty, and with max load it weighes 3,260 kg.
     
  14. mosquitoman

    mosquitoman Active Member

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    What's the difference in looks because thye must be very similar coming from the same design bureau
     
  15. Anonymous

    Anonymous Guest

    Only a few Yak-9UT's saw service. The Yak-9T or Yak-9 are the proper planes to compare. I gave the weights of the standard Yak-9 and the final (mostly metal) Yak-9P.

    So far, every source says the Yak-3 was the more agile plane.

    =S=

    Lunatic
     
  16. cheddar cheese

    cheddar cheese Active Member

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    Yes they do look very similar -

    [​IMG]
    Yak-3

    [​IMG]
    Yak-9

    The Yak-9 does look heavier and perhaps thougher than the Yak-3, and the Yak-3 was probably the more agile of the two. Indeed looking at some figures I have here the Yak-3 also seems to have superior performance figures.
     
  17. Soren

    Soren Banned

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    Thats because it WAS more agile overall, it just didnt turn as tightly !

    The Fw-190 is also attributed as being much more agile than the Spitfire, but it still didnt turn as well as the Spit. (Except at high speeds)

    The same goes for the Yak-3 wich had a far faster roll-rate than the Yak-9, but didnt turn as well.
     
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