Asymetrical Wing Lengths

Discussion in 'Flight Test Data' started by Ural Rider, Jun 15, 2009.

  1. Ural Rider

    Ural Rider New Member

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    In the Squadron Signal book "Macchi C.205 Veltro Walk-Around", it mentions "As with all Macchi fighters, the C.205's starboard wing was 20cm shorter in span to compensate for propeller torque."
    How common was this ?
     
  2. vikingBerserker

    vikingBerserker Well-Known Member

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    I've never even heard of that before.
     
  3. mudpuppy

    mudpuppy Member

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    I'm with you fellas, on this one. I had never heard this either, not doubting what you'd read, Ural...just it comes as news to me. If the starboard wing was required to be a wee bit shorter to compensate for engine torque does this just represent an instability of the Macchi design or do other planes have the same problem.
    I know there are some pilots and aviation engineers types around so I am quite curious to hear from them.
    Regards,
    Derek
     
  4. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    I would not be surprised. I've heard of off setting the vertical stabilizer as well.
     
  5. Marcogrifo

    Marcogrifo Member

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    #5 Marcogrifo, Jun 16, 2009
    Last edited: Jun 17, 2009
    Yes, it's true: both Macchi's C.202 and C.205 (that were equipped with the same wing type) had asymmetrical wings for torque compensating.

    [​IMG]

    Cheers
     
  6. Lucky13

    Lucky13 Forum Mascot

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    I'll be.....:shock:
     
  7. comiso90

    comiso90 Active Member

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    I wonder if there were any negative side effects?

    i cant believe I didnt know about that...

    .
     
  8. Colin1

    Colin1 Active Member

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    So how would that work?
    Which wing would be shorter wrt prop rotation?

    My take on torque-related problems is that the ground-handling characteristics got nastier, how would this help?
     
  9. Soren

    Soren Banned

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    As mentioned, it was to counter torque effects and yaw. The vertical stabilizer was slightly twisted to the left for the same reason.
     
  10. vikingBerserker

    vikingBerserker Well-Known Member

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    Why do I picture two guys screwing up and making one wing longer then the other with one of them saying:

    "it's to compensate for propeller torque.....really!"
     
  11. Butters

    Butters Member

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    #11 Butters, Jun 16, 2009
    Last edited: Jun 16, 2009
    I never knew that, but then I'm not all that familiar with Italian fighters. Does anyone know if this was the case with any other fighters?

    JL

    PS: I seem to recollect that some fighters had the engine thrustline offset from the longitudinal axis of the fuselage to reduce torque effects. Is this true, or am I just confused again?
     
  12. GrauGeist

    GrauGeist Well-Known Member

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    Blohn and Voss were working with Asymetrical configurations, although they took it to an extreme. Thier best known example would be the Bv141.

    I think the BvP178 was the best looking of thier designs, though it didn't get past the testing stages.
     

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  13. gumbyk

    gumbyk Well-Known Member

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    Butters, this is a fairly common design feature, not restricted to fighters.

    Most aircraft, no matter how low-powered have either the vertical fin or the engine offset by a small (2-3ยบ) amount. It's fairly hard to see, unless you are looking straight down on the aircraft when the cowls are off.
     
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