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    The Flight Blog - Read Articles The Flight Blog - Read Articles
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    Plane of the Week: Boeing-Stearman Model 75

    Plane of the Week: Boeing-Stearman Model 75

    By Sarah Simonovich on Jun 15th 2018

    No matter what you call it- Stearman Biplane, Boeing-Stearman Model 75, PT-17, or Kaydet-one thing remains the same: it's one of the best-known biplanes in history.


    The Stearman Aircraft Co. manufactured the Stearman Model 75 from 1934 through 1945 in Wichita, Kansas. During this time, they produced around 10,000 aircraft. 8,584 aircraft were completed while the rest were spare parts (equaling about 2,000 planes worth).

    The Model 75 was used as a military trainer aircraft primarily for the US Army Air Forces and US Navy. The Royal Canadian Air Force also utilized this biplane (known as the Kaydet) during World War II. Post-war, surplus aircraft entered were sold into the civilian market. Many of these biplanes became crop dusters, sports planes, and were used for aerobatic and wing walking in air shows.

    Design & Development

    In terms of its design, the Model 75 is a conventional biplane of rugged construction. Stearman built these planes with a large, fixed tailwheel undercarriage. Typically, they have an uncowled radial engine. Most airframes have remained the same across all aircraft produced. The major differences between planes have been the engines, ranging from the Lycoming R-680 (225 hp), Continental R-670 (220 hp), and the Jacobs R-755 (225 hp) to the Lycoming R-680 (300 hp), Pratt & Whitney R-985 (450 hp), and the Jacobs R-775 (275 hp). Most Stearmans have either the Sensenich wooden prop, ground-adjustable McCauley steel blade prop, or the fixed-pitch Hamilton Standard propeller. 


    The primary differences between aircraft manufactured for the U.S. Army Air Corps and the U.S. Navy were the engine and the tail wheel. While Stearman outfitted Army planes with a fully-steerable tail wheel, they gave Navy planes a full swivel type with a lock. Today, most Stearmans have been modified with a steerable tail.

    Each biplane cost the military between $10,000 and $11,000. Today, that would be greater than $200,000 with inflation.

    Stearman

    The Stearman Model 75 (frequently referred to as simply the Stearman) proved to be the Stearman Aircraft Corporation's most successful and enduring product. Initially founded in 1926 and then later reestablished in 1927, Stearman became a subsidiary of Boeing in 1934.

    A number of these aircraft remain in flying condition throughout the world. The Model 75 biplane continues to be a popular sport plane and warbird.

    #AOOFlightClub

    Fun fact: a Boeing-Stearman Model 75 biplane was the winner of a round of #AOOFlightClub! Check out this beauty:

    aoo flight club boeing stearman winner



    Does your plane have what it takes to win the fight? Follow Aviation Oil Outlet's social media channels to stay up-to-date on contest announcements! You can like us on Facebook, follow us on Twitter, and join us on Instagram!




    Sources:

    Image credit:  By Juergen Lehle - Own work (See also AlbSpotter Flugzeugbilder Aircraft Photos), CC BY-SA 3.0, Link


    http://stearmanflyin.com/2010/08/27/in-depth-look-...

    https://en.wikipedia.org/wiki/Boeing-Stearman_Mode...

    https://disciplesofflight.com/boeing-stearman-mode...

    • #Plane Of The Week
    • #Boeing
    • #flight club
    • #model 75
    • #navy
    • #stearman
    • #Stearman Aircraft Co
    • #Stearman Model 75
    • #USAAF
    • #sarah simonovich

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