请输入您要查询的百科知识：

　

词条 Driggs-Johnson DJ-1 Bumblebee
释义

  1. Design and development

  2. Operational history

  3. Variants

  4. Specifications (DJ-1)

  5. References

name=DJ-1 Bumblebee image=DJ-1 Bumblebee.png caption=

}}{{Infobox Aircraft Type

 type=Single seat sport aircraft national origin=US manufacturer=Johnson Airplane & Supply Co, Dayton designer=Ivan H. Driggs first flight=1924 introduced= retired= status= primary user= more users= produced= number built=at least 2, about 20 including later variants program cost= unit cost= developed from= variants with their own articles=Driggs Dart
}}

The Driggs-Johnson DJ-1 Bumblebee was a single engine, low power, single seat, parasol wing sports monoplane built in the US in 1924. It and its immediate development the Driggs Dart 1 had some competition successes; the design was further developed into two seat sesquiplanes known as the Driggs Dart 2 and Skylark. In all, about twenty were built.

Design and development

The Bumblebee was designed by Ivan Driggs and built by the Johnson Airplane Company. It had advanced features: cantilever monoplanes were uncommon in the 1920s, steel tube framed lightplanes novel and enclosed cockpits rare. Its parasol wing had two spars of laminated spruce, the number of laminations decreasing outboard, and a {{convert|0.0625|in|mm|abbr=on|2}} birch skin from the leading edge to the rear spar. Behind this the wing was fabric covered, as were the steel framed ailerons. In plan the wing was tapered with rounded tips.

The wing was attached to the fuselage with four cabane struts on each side, plus one sloping downwards aft centrally. The Bumblebee was powered by a {{convert|28|hp|kW|abbr=on|0}} Henderson four cylinder engine, carefully cowled with a cooling air inlet beneath the drive shaft of the two blade propeller. The fuselage was built from internally wire braced welded steel tubes, a method user by Fokker aircraft but unfamiliar on light planes. The forward fuselage including engine, cockpit and wing mounting was rectangular in cross-section, becoming triangular, vertex up, aft. The pilot sat under the forward part of the wing not in an open cockpit as usual at the time but surrounded by curved celluloid sheet, attached to the cabane struts, which extended upwards vertically from the fuselage to the wing underside but sloping aft. There was a celluloid window in the wing over his head to provide upward vision. Access to the cockpit was via a port side door.[3]

The empennage of the Bumblebee was, like the fuselage, steel framed. Its straight edged, braced tailplane and split elevators were mounted on top of the fuselage; the fin had a curved leading edge, the rudder moving in an elevator cut-out. The undercarriage was of the fixed, conventional type, with mainwheels on a single axle, each side attached to the fuselage by a single streamlined strut.[3]

The first DJ-1 flew in 1924, with the Henderson engine.[3] Some images show it without its cockpit transparencies.[6] On its earliest outings it was referred to as the Driggs-Johnson Jimmie.[3] A developed version, the Driggs Dart 1, was flown in 1926; powered by a {{convert|35|hp|kW|abbr=on|0}} Anzani engine, this had a maximum speed of {{convert|95|mph|km/h|abbr=on|0}}, though it was later fitted with a {{convert|28|hp|kW|abbr=on|0}} Wright-Morehouse engine.

Operational history

At least two DJ-1s were built. The first of these won the race sponsored by the Dayton Daily News in early October 1924 and came second in both the speed and efficiency competition and a cross country race for the Rickenbacker trophy.[3] The second was sold to the US Army and was fitted with slots and flaps.[6] The Wright-Morehouse powered Dart 1 received a lightplane prize in the 1926 Ford Air Tour,[11] despite failing to complete the course, as it was the only lightplane competing.

Variants

Driggs-Johnson DJ-1
1924 prototype.
//Driggs Dart">Driggs Dart 1: 1926 development powered by {{convert|35|hp|kW|abbr=on|0}} Anzani engine, later by a {{convert|28|hp|kW|abbr=on|0}} Wright-Morehouse.[6] Revised undercarriage with three struts per side.[11]

Specifications (DJ-1)

{{Aircraft specs
|ref=Flight 13 November 1924, p.722
|prime units?=imp


|genhide=
|crew=One
|capacity=
|length ft=
|length in=
|length note=
|span m=
|span ft=27
|span in=0
|span note=
|height m=
|height ft=
|height in=
|height note=
|wing area sqft=70
|wing area note=
|aspect ratio=9.8
|airfoil=USA 45
|empty weight lb=326
|empty weight note=
|gross weight lb=511
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity=
|more general=


|eng1 number=1
|eng1 name=Henderson
|eng1 type=4-cylinder air-cooled 80 cu in (1.30 L)
|eng1 hp=28
|eng1 note=[6]
|power original=
|more power=
|prop blade number=2
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=


|perfhide=
|max speed kmh=
|max speed mph=85
|max speed kts=
|max speed note=approximately
|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=
|minimum control speed kmh=
|minimum control speed mph=
|minimum control speed kts=
|minimum control 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=
|sink rate ms=
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading lb/sqft=7.3
|wing loading note=
|power/mass=
|more performance=
}}{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
}}

References

{{commons category|Driggs-Johnson DJ-1 Bumblebee}}
1. ^1 2 3 4 5 {{cite journal|date=30 October 1924 |title=Light 'plane and glider notes|journal=Flight|volume=XVI|issue=44|pages=696–7|url=http://www.flightglobal.com/pdfarchive/view/1924/1924%20-%200696.html}}
2. ^1 2 3 4 {{cite web |url=http://www.aerofiles.com/_d.html|title=Driggs-Johnson|accessdate=10 May 2013}}
3. ^1 2 {{cite book |title=The Ford Air Tours 1925-31 |last=Forden |first=Lesley |pages=33, 40|year=1972|publisher= Nottingham Press|location= |isbn=|url=http://www.nationalairtour.org/pdf/ford_pdf_files/intro.PDF}}
[1][2][3]
}}

4 : Single-engined tractor aircraft|Parasol-wing aircraft|United States sport aircraft 1920–1929|Aircraft first flown in 1924
随便看

　

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

　

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间：2024/11/12 19:20:48