Wing-tip drop tanks vs. 'regular' drop tanks?

Discussion in 'Post-War' started by tomo pauk, Dec 21, 2013.

  1. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Wing-tip fuel tanks came in vogue post-ww2. Wonder whether someone might shed some light explaining both good and bad things, vs. the usual configuration used on ww2 aircraft?

    MODERATORS, could you please move this into the 'Aviation' subforum - thanks :)
     
  2. michaelmaltby

    michaelmaltby Well-Known Member

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    #2 michaelmaltby, Dec 21, 2013
    Last edited: Dec 21, 2013
    I think FlyboyJ has covered much of this in various posts. Tip Tanks can stabilize wing aerodynamics ..... if I understood him correctly.
     

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  3. silence

    silence Active Member

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    and they look cool!
     
  4. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    Moved it into post WW2.
     
  5. davebender

    davebender Well-Known Member

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    Probably need to reinforce wings if you are going to place several hundred pounds of fuel on the tips.
     
  6. Capt. Vick

    Capt. Vick Well-Known Member

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    I have heard that the P-80 was aerodynamically "cleaner" with tip tanks than without.
     
  7. Glider

    Glider Well-Known Member

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    Its a guess but I suspect the wing tip tank would have a similar impact as the winglets on modern airliners. The would reduce the induced drag resulting in a cleaner airflow.
     
  8. iron man

    iron man Member

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    Ahh. The good old "ERB" (End of Runway Bomber).

    757 is a beauty, served with 434 in the late '70's.

    The BEST Thing about the CF-116 was the fact that it ATE UP HOURS at a cheap price per hour. I lived in Cold Lake during the '70's and was there during the CF-18 transition as well. Seen it all...and then some.
     
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  9. swampyankee

    swampyankee Active Member

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    The tip tanks' weight is only a problem when the aircraft is on the ground. In flight, they will reduce the bending moment on the wings.

    As to the aerodynamics, tip tanks may reduce the induced drag enough to offset their form drag. They probably did so on the F-80 and the USN's F9F Panther.
     
  10. GrauGeist

    GrauGeist Well-Known Member

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    And the F2H2 Banshee, if I remember right.
     
  11. gjs238

    gjs238 Well-Known Member

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    Were there ever DROP wing tip tanks, or are they permanent?
     
  12. gumbyk

    gumbyk Well-Known Member

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    I'm not aware of any that were drop tanks. When they were empty, they'd almost surely improve efficiency of the wing, so there's not real point in dropping them.
     
  13. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    This would depend on the aircraft. I could tell you that tip tanks did not reduce the bending moment on the T-33 during certain speeds and flight attitudes..

    Again, depends on the aircraft.

    There are pics and films of F-80s and F-84s dropping their tip tanks. The L29R and L39 have permanent tip tanks.
     
  14. michaelmaltby

    michaelmaltby Well-Known Member

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    Off topic but lovely photos ..... drop tanks into canoes in Viet Nam
     

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  15. iron man

    iron man Member

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    <singing>
    "Reduce, Re-use...Recycle aaand. Recover".
    <singing off>

    For those who don't get it...

    (Old Canadian Government PSA spot from the late '70's CBC...)
     
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  16. gumbyk

    gumbyk Well-Known Member

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    I stand corrected....


    Again....
     
  17. swampyankee

    swampyankee Active Member

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    I am surprised by that, but I don't disbelieve you. Probably, there are also conditions where the tanks could worsen torsional loads.
     
  18. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    The larger tip tanks do some un-nerving things at higher speeds and in dives.
     
  19. N4521U

    N4521U Well-Known Member

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    How did tip tanks contribute to the spin characteristics of the aircraft?
     
  20. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    I was never in a T-33 during a spin but from what I understand it's not that bad even with the tip tanks. I'm told there is a tendency for the aircraft to pitch up and become inverted.
     
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