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词条 Folkerts SK-2
释义

  1. Design and development

  2. Operational history

  3. Variants

  4. Specifications (Folkerts SK-1)

  5. See also

  6. References

  7. External links

name=SK-2 image=Folkerts Sk-2.jpg caption=Folkerts SK-2

}}{{Infobox Aircraft Type

type=Racing aircraft national origin=United States of America manufacturer= designer=Clayton Folkerts, Harold Neumann, Ted Forden first flight= introduced=1936 retired= status= primary user= more users= produced= number built=1 program cost= unit cost= developed from= variants with their own articles=Folkerts SK-3
}}

The Folkerts SK-2, also known as Speed King Two, "Toots" and "Miss Detroit" was a racer built for the 1936 National Air Races

Design and development

Clayton Folkerts designed his second racer, the SK-2 Toots after leaving the Mono-Aircraft Company, and Waco.[1] It was commissioned by TWA pilot Harold Neumann in 1936.

The aircraft was a mid-winged conventional geared aircraft with crank activated retractable landing gear and trailing edge flaps. The fuselage was built of welded steel tube with aircraft fabric covering and the wings were made with spruce spars and plywood covering. The Menasco C-4S engine featured a one-foot propeller extension to allow a more streamlined cowling.[2]

Operational history

In the 1936 National Air Races, Harold Neumann won three firsts, two seconds, and placed fourth in the Thompson Trophy race. Steve Wittman survived a flight in the SK-2 with a ruptured gas tank that leaked into the cockpit. In St. Louis, pilot Roger Don Rae landed gear up, badly damaging the aircraft.

At the 1937 National Air Races, the aircraft was renamed "Miss Detroit" and pilot Roger Don Rae placed three seconds and one fourth place.

In the 1938 Oakland Air Races, the rear fuselage was metalized. Pilot Gus Gotch was chosen as pilot; he entered a spin on a pylon turn and was killed when the aircraft struck the bay.[3] The cause was undetermined, but fellow racing pilots blamed the heavy locking mechanism for the landing gear as a contributing distraction in high-speed low level flight.[4]

Variants

The Folkerts SK-3 has a nearly identical design, except for a longer nose for a Menasco C-6S-4 engine.[5]

Specifications (Folkerts SK-1)

{{Aircraft specs
|ref=Sport Aviation
|prime units?=kts


|genhide=
|crew=
|capacity=1
|length m=
|length ft=19
|length in=6
|length note=
|span m=
|span ft=16
|span in=
|span note=
|height m=
|height ft=5
|height in=3
|height note=
|wing area sqm=
|wing area sqft=50
|wing area note=
|aspect ratio=
|airfoil=
|empty weight kg=
|empty weight lb=700
|empty weight note=
|gross weight kg=
|gross weight lb=1000
|gross weight note=
|fuel capacity=
|more general=


|eng1 number=1
|eng1 name=Menasco C4S
|eng1 type=363 cubic inch, inline, supercharged four cylinder aircraft engine
|eng1 kw=
|eng1 hp=185
|prop blade number=2
|prop name=Fahlin
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=Wood


|perfhide=
|max speed kmh=
|max speed mph=233
|max speed kts=
|max speed note=
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=
|stall speed kts=
|stall speed note=
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=
|range km=
|range miles=
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude=
|lift to drag=
|wing loading kg/m2
|wing loading lb/sqft=
|wing loading note=
|power/mass=
|thrust/weight=
|more performance=
}}

See also

{{aircontent
|see also=
|related=
  • Folkerts SK-1
  • Folkerts SK-3
  • Folkerts SK-4

|similar aircraft=
|lists=
}}

References

Notes
1. ^{{cite journal|magazine=Sport Aviation|date=October 1958}}
2. ^{{cite journal|magazine=Aero Digest|date=October 1938}}
3. ^AAHS Journal (American Aviation Historical Society), Volume 34.
4. ^[https://books.google.ca/books?id=qCgDAAAAMBAJ&pg=PA1&lpg=PA1&dq=%22Popular+Science%22+September+1938&source=bl&ots=eu4RwoyKzD&sig=esiM1oC2s--Bg57fignuE2dntHc&hl=en&sa=X&ei=rYEKT_xoheu2B5Xk6P8C&ved=0CFEQ6AEwCQ#v=onepage&q=Folkerts&f=false "Aviation's Guinea Pigs."] Popular Science, September 1938, pp. 92–93.
5. ^Aeronautics, Volume 44, 1961.
Bibliography
{{refbegin}}
  • Foxworth, Thomas G. The Speed Seekers. New York: New York: Doubleday, 1976. {{ISBN|0-385-06050-5}}.
  • Matthews, Birch. Race with the Wind: How Air Racing Advanced Aviation. Minneapolis, Minnesota: Zenith Publishing, 2001. {{ISBN|978-0-7603-0729-8}}.
  • Matowitz, Thomas G. Jr. Cleveland's National Air Races (Images of Aviation). Mount Pleasant, South Carolina: Arcadia Publishing, 2006. {{ISBN|978-0-7385-3996-6}}.
  • Schmid, Sylvester H. and Truman C. Weaver. The Golden Age of Air Racing: 1927–1933. Oshkosh, Wisconsin: EAA Aviation Foundation, 1983. {{ISBN|978-0-8168-7816-1}}.
  • Vorderman, Don. The Great Air Races. New York: Doubleday, 1969.
{{refend}}

External links

{{commons category|Folkerts aircraft}}
  • Photo of the SK-2

4 : Racing aircraft|Mid-wing aircraft|Single-engined tractor aircraft|Aircraft first flown in 1936

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