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Thread: For those who like Mechanical things

  1. #1
    Join Date
    Oct 2006
    somewhere east of Queen Creek, AZ - South East of Phoenix

    For those who like Mechanical things

    Below, you will find a great test stand video of the Pratt & Whitney 4360 Wasp engine introduced in 1944. Basically, the engine was 28-cylinder four-row air cooled radial engine. Each row of pistons was slightly offset from the previous, forming a semi-helical arrangement to facilitate efficient airflow cooling of the successive rows of cylinders, with the spiraled cylinder setup inspiring the engine's "corncob" nickname. A mechanical supercharger geared at 6.374:1 ratio to engine speed provided forced induction, while the propeller was geared at 0.375:1 so that the tips did not reach inefficient supersonic speeds. Initially, it developed 3,000 horsepower, later models gave 3,500 horsepower.

    The 4360 powered the B-50, successor to the B-29 and later the B-36, to name a few. And although reliable in flight, the Wasp Major was maintenance-intensive. Improper starting technique could foul all 56 spark plugs, which would require hours to clean or replace. As with most piston aircraft engines of the era, the time between overhauls of the Wasp Major was about 600 hours when used in commercial service.

    It looks and sounds neat. A test stand video of a newly restored engine. Turn the speakers all the way up. Bask in the roar of twenty-eight cylinders belching the sound of freedom. Also, the sound will most likely clear out the cat, your wife and any other extemporaneous people not accustomed to military sounds and the glorious roar of a Pratt & Whitney "round" engine. As the Warbird people say, "Jets are for kids."

    "Thereís a lot of work being done today that doesnít have any soul in it. The technique may be the utmost perfection, yet it is lifeless. It doesnít have a soul. I hope my furniture has a soul to it." - Sam Maloof
    The Pessimist complains about the wind; The Optimist expects it to change;The Realist adjusts the sails.~ William Arthur Ward

  2. #2
    Join Date
    Dec 2006
    Melbourne, FL
    There use to be a cut away full size one of these on display at Pratt & Whitney in Connecticut.

    A very impressive piece of work.

  3. #3
    Join Date
    Aug 2007
    Reno NV
    Very cool!
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash

  4. #4
    Join Date
    Jun 2007
    Oceanside, So. Calif. 5 mi. to the ocean


    First of all you have to be smarter than the machine.

  5. #5
    Join Date
    Jan 2011
    Spitting distance north of Detroit Michigan
    Yep, definitely cool
    The perception of perfection is perfectly clear to everyone else

  6. #6
    Join Date
    Jul 2009
    Amherst, New Hampshire
    Faith, Hope & Charity

  7. #7
    Join Date
    Dec 2006
    RETIRED(!) in Austintown, Ohio
    Howard Hughes' Spruce Goose used eight of those engines. When it was on display in Long Beach, they had a motorized cut-away on display there, too.

    Biggest ones I ever worked on were some 3350's, but mostly worked on 2800's.
    Jim D.

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