“Brantly B-1”的意思、由来-开放百科全书

词条

Brantly B-1

释义

Design and development
Specifications
References
External links

name = Brantly B-1

image =

caption =

}}{{Infobox Aircraft Type

type = light coaxial-rotor helicopter

manufacturer = Brantly Helicopter Corporation

designer = Newby O. Brantly

first flight = 1946

introduced =

retired =

status = abandoned

primary user =

more users =

produced =

number built =

unit cost =

developed from =

variants with their own articles =
}}

The Brantly B-1 was a 2-seat, coaxial-rotor helicopter designed by Newby O. Brantly and constructed by the Pennsylvania Elastic Company, Brantly's employer.

Design and development

In 1946, Brantly started flight testing the B-1 prototype (NX69125), which used a 150 hp Franklin O-335 engine in the fabric fuselage and two three-bladed rotors that rotated at 320 rpm and were fitted coaxially. The collective, cyclic, and differential controls were enclosed in the rotor hubs and ran in an oil-bath. Each rotor blade weighed 5.5 kilos. It also had a fixed wheel undercarriage with a tailwheel under the tailfin.^[1]

Unfortunately, the design was too heavy and complex and was abandoned.

Specifications

{{Aircraft specs
|ref=^[2]
|prime units?=imp

|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=
|cruise speed kmh=182
|cruise speed mph=
|cruise speed kts=
|range km=640
|range miles=
|range nmi=
|endurance=
|ceiling m=
|ceiling ft=
|g limits=
|roll rate=
|climb rate ms=
|climb rate ftmin=
|lift to drag=
|disk loading kg/m2
|disk loading lb/sqft=
|more performance=
|avionics=
}}

References

1. ^{{cite book|last1=Simpson|first1=R.W.|title=Airlife's Helicopters and Rotorcraft|date=26 May 1998|publisher=The Crowood Press Ltd|isbn=978-1853109683}}
2. ^{{cite book|last1=Lambermont|first1=Paul Marcel|first2=Anthony|last2=Pirie|title=Helicopters and autogyros of the world|date=1970|publisher=Barnes|edition=Illustrated, revised}}

External links

Brantly Historical Photos

5 : United States civil utility aircraft 1940–1949|United States helicopters 1940–1949|Coaxial rotor helicopters|Brantly aircraft|Aircraft first flown in 1946

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。