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词条 Gee Bee Q.E.D.
释义

  1. Development

  2. Design

  3. Operational history

  4. Variants

  5. Specifications (Gee Bee Q.E.D.)

  6. References

  7. External links

name=Gee Bee Q.E.D. image=Granville Brothers R-6H.jpg size=299px caption=The R-6H prepares for the MacRobertson Air Race

}}{{Infobox Aircraft Type

 type=Air racing national origin=United States of America manufacturer=Granville Brothers Aircraft, Granville, Miller & De Lackner designer=Zanford Granville, Howell Miller, Don Delackner first flight=1934 introduced=1934 retired= status=under restoration primary user= more users= produced= number built=1 program cost= unit cost= developed from=Gee Bee R-5 variants with their own articles= developed into=
}}

The Gee Bee Q.E.D. ("Quod Erat Demonstrandum"), aka Gee Bee R-6H, aka the "Conquistador del Cielo" (Sky Conqueror) was the last in a series of racing and touring aircraft from the Granville Brothers. Unlike the other Gee Bee aircraft, the Q.E.D had the distinction of never finishing a race it was entered in.[1]

Development

The Gee Bee Q.E.D. was started by the Granville Brothers in 1933, but the firm went into bankruptcy in October 1933. On 11 February 1934, Zanford Granville died in Spartanburg, South Carolina, when the Sportster E he was delivering crashed. This aircraft was being used to finance a new company based in New York and called Granville, Miller & De Lackner. The R-6H (Q.E.D.) was completed later in 1934 for customer Floyd B. Odlum, with Jacqueline Cochran chosen as the pilot.[2] The touring aircraft was designed with large fuel tanks to compete in the MacRobertson Air Race from RAF Mildenhall in East Anglia to Flemington Racecourse, Melbourne. A Curtiss Conqueror was the specified engine, but a Pratt & Whitney Hornet was substituted to make the race delivery date.

Design

The Gee Bee Q.E.D. shares the same general shape as the Gee Bee R1 racer, but is nearly {{convert|10|ft|m|1|abbr=on}} larger in span and length. The aircraft was powered by a {{convert|675|hp|kW|0|abbr=on}} Pratt & Whitney R-1690 Hornet. The fuselage is steel tube with fabric covering. The wings used wooden spars and ribs with mahogany plywood covering. The aircraft was painted bright green with orange markings to match the sponsor "Lucky Strike" cigarettes.

Operational history

The Q.E.D. failed to complete races for a variety of reasons, including a rag in the intake manifold, and a problematic cowling that came loose on several occasions.

  • 1934 Bendix Race - Pilot Lee Gehlbach drops out en route to the race at Des Moines, Iowa after the cowling hit the prop.
  • 1934 MacRobertson Air Race - Jacqueline Cochran and Wesley Smith withdrew with malfunctioning flaps, after landing damage at Bucharest [3]
  • 1935 Bendix Race -pilot Royal Leonard forced down with engine trouble at Wichita, Kansas
  • 1936 Thompson Trophy race - pilot Lee Miles dropped out after 10 laps. The aircraft goes into storage at Tucson, Arizona.
  • 1938 Bendix Race - The aircraft is repainted cream and flown by George Armisted [4]
  • 1939 24 May, owner Francisco Sarabia set a new record for a non-stop flight from Mexico City to New York City in 10 hours and 47 minutes. He also set records for flights between Los Angeles to Mexico City, Mexico to Chetumal, Mexico to Mérida and Mexico to Guatemala.
  • 1939 Pilot Francisco Sarabia was killed in the crash of the Q.E.D. at Bolling Airfield in Washington D.C. when a rag was ingested into the carburetor. Sariabia struck the center post in the cockpit when the aircraft went into the Potomac river, but the aircraft remained intact and was brought back to Mérida, Yucatán.[5] Sarabia was well regarded in Mexico, he was buried in the Panteón de Dolores.A Mexican postage stamp was issued in his honor in 2000, featuring a picture of Sarabia and the Q.E.D.[6]

In 1972, the Q.E.D. underwent full restoration in Mexico City,[7] and is on display at the Museo Francisco Sarabia, Ciudad Lerdo.

Variants

Gee Bee Super Q.E.D. II
A highly modified replica of the Gee Bee Q.E.D. was built by Jim Moss and assistants powered by a {{convert|1425|hp|kW|0|abbr=on}} Wright R-1820 Cyclone. The aircraft flew its first flight on 26 September 2013.[8][9][10]

Specifications (Gee Bee Q.E.D.)

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


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|crew=
|capacity=2
|length m=
|length ft=27
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|height in=6
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|aspect ratio=
|airfoil=
|empty weight kg=
|empty weight lb=3144
|empty weight note=
|gross weight kg=
|gross weight lb=6500
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity={{convert|480|u.s.gal}}
|more general=


|eng1 number=1
|eng1 name=Pratt & Whitney R-1690 Hornet
|eng1 type=radial piston engine
|eng1 kw=
|eng1 hp=675
|prop blade number=
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=


|perfhide=
|max speed kmh=
|max speed mph=225
|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=2,400
|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=
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}}

References

1. ^{{cite book|title=Flying, an introduction to flight, airplanes, and aviation careers|author=Walter J. Boyne}}
2. ^{{cite book|title=The great air races|author=Don Vorderman}}
3. ^{{cite book|title=Women in space: -- following Valentina|author=David Shayler, Ian A. Moule}}
4. ^{{cite book|title=Sport aviation, Volume 45; Experimental Aircraft Association International Inc}}
5. ^{{cite book|title=The best of Wings magazine|author=Walter J. Boyne}}
6. ^{{cite web|title=Filatelia De Mexico |url=http://www.filateliademexico.com/e2000/sarabia.html |accessdate=15 June 2011 |deadurl=yes |archiveurl=https://web.archive.org/web/20120325191435/http://www.filateliademexico.com/e2000/sarabia.html |archivedate=25 March 2012 |df= }}
7. ^{{cite journal|magazine=Skyways|date=April 2006}}
8. ^{{cite web|title=Jim Moss's Gee Bee Q.E.D. Makes Maiden Flight |url=http://www.eaa.org/news/2013/2013-10-03_jim-moss-gee-bee-qed-makes-maiden-flight.asp |accessdate=4 October 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20131004220722/http://www.eaa.org/news/2013/2013-10-03_jim-moss-gee-bee-qed-makes-maiden-flight.asp |archivedate=4 October 2013 |df= }}
9. ^{{Cite journal|magazine=Sport Aviation|date=June 2011}}
10. ^{{cite journal|magazine=Sport Aviation|title=The Last Gee Bee|date=April 2014|page=53}}

External links

{{commons category|Gee Bee Q.E.D.}}
  • Airliners.net
  • [https://www.youtube.com/watch?v=gfE-8vub_NI Museum video]
  • [https://www.youtube.com/watch?v=wlVlRlCoBJ0 Video - The Great Air Race - England to Melbourne 1934]
{{Granville Brothers aircraft}}

6 : Granville Brothers aircraft|United States sport aircraft 1930–1939|Single-engined tractor aircraft|Low-wing aircraft|Racing aircraft|Aircraft first flown in 1934
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