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{{short description|American bomber project}}
__NOTOC__
{{Refimprove|date=June 2019}}
{|{{Infobox aircraft begin
{{Infobox aircraft
|name = XB-27
| name = XB-27
|image = <!-- in the ''File:filename'' format with no image tags. In-flight images are preferred for aircraft. -->
| image = XB-27-Schematics.jpg
|caption = <!-- Image caption; if it isn't descriptive, please skip. -->
|alt = <!-- Alt text for main image -->
| caption = <!-- Image caption; if it isn't descriptive, please skip. -->
| alt = <!-- Alt text for main image -->
}}{{Infobox aircraft type
|type = High-altitude medium bomber
| type = High-altitude medium bomber
|national origin = [[United States|USA]]
| national_origin = [[United States]]
|manufacturer = [[Glenn L. Martin Company|Martin]]
| manufacturer = [[Glenn L. Martin Company]]
|designer = <!--Only appropriate for single designers, not project leaders-->
| designer = <!--Only appropriate for single designers, not project leaders-->
|first flight = <!--If this hasn't happened, skip this field!-->
| first_flight = <!--If this hasn't happened, skip this field!-->
|introduced = <!--Date the aircraft entered or will enter military or revenue service-->
| introduction = <!--Date the aircraft entered or will enter military or revenue service-->
|retired = <!--Date the aircraft left service. If vague or more than a few dates, skip this -->
| retired = <!--Date the aircraft left service. If vague or more than a few dates, skip this -->
|status = <!--In most cases, redundant; use sparingly-->
| status = <!--In most cases, redundant; use sparingly-->
|primary user = <!-- List only one user; for military aircraft, this is a nation or a service arm. Please DON'T add those tiny flags, as they limit horizontal space. -->
| primary_user = <!-- List only one user; for military aircraft, this is a nation or a service arm. Please DON'T add those tiny flags, as they limit horizontal space. -->
|more users = <!-- Limited to THREE (3) 'more users' here (4 total users). Separate users with <br />. -->
| more_users = <!-- Limited to THREE (3) 'more users' here (4 total users). Separate users with <br />. -->
|produced = <!--Years in production (eg. 1970–1999) if still in active use but no longer built -->
| produced = <!--Years in production (eg. 1970–1999) if still in active use but no longer built -->
|number built = <!-- Total number of flight-worthy aircraft completed. -->
| number_built = <!-- Total number of flight-worthy aircraft completed. -->
|program cost = <!--Total program cost-->
| program cost = <!--Total program cost-->
|unit cost = <!--Incremental or flyaway cost for military or retail price for commercial aircraft-->
| unit cost = <!--Incremental or flyaway cost for military or retail price for commercial aircraft-->
|developed from = <!--The aircraft which formed the basis for this aircraft-->
| developed_from = [[Martin B-26 Marauder]]<!--The aircraft which formed the basis for this aircraft-->
|variants with their own articles = <!--Variants OF this aircraft-->
| variants = <!--Variants OF this aircraft-->
|developed into = <!--For derivative aircraft based on this aircraft-->
| developed_into = <!--For derivative aircraft based on this aircraft-->
}}
}}
|}


The '''Martin XB-27''' ('''Martin Model 182''') was an aircraft proposed by the [[Glenn L. Martin Company]] to fill a strong need in the [[United States Army Air Corps]] for a high-altitude [[medium bomber]]. Its design was based approximately on that of Martin's own [[Martin B-26 Marauder|B-26 Marauder]]. The XB-27 never made it past paper, and no prototypes were built.
The '''Martin XB-27''' ('''Martin Model 182''') was an aircraft proposed by the [[Glenn L. Martin Company]] to fill a strong need in the [[United States Army Air Corps]] for a high-altitude [[medium bomber]]. Its design was based approximately on that of Martin's own [[Martin B-26 Marauder|B-26 Marauder]]. The XB-27 remained on paper, and no prototypes were built.


==Specifications (as designed)==
==Specifications (as designed)==
{{Aircraft specs
{{aircraft specifications
|ref=<ref name="Heyman">{{cite book |last1=Heyman |first1=Jos |title=UNITED STATES MILITARY AIRCRAFT : Air Force : B=Bomber |date=2015}}</ref>
|plane or copter?=plane
|prime units?=imp
|jet or prop?=prop
<!--
|ref={{Citation needed|date=August 2011}}
General characteristics
-->
|crew=7
|crew=7
|capacity=
|length main=60 ft 9 in
|length alt=18.5 m
|length m=
|length ft=60
|span main=84 ft 0 in
|length in=9
|span alt=25.6 m
|length note=
|height main=20 ft 0 in
|span m=
|height alt=6.10 m
|area main=
|span ft=84
|area alt=
|span in=0
|height ft=20
|empty weight main=
|height in=0
|empty weight alt=
|height note=
|loaded weight main=33,000 lb
|wing area sqm=
|loaded weight alt=15,000 kg
|wing area sqft=
|max takeoff weight main=
|wing area note=
|max takeoff weight alt=
|swept area sqm=<!-- swing-wings -->
|number of props=2
|swept area sqft=<!-- swing-wings -->
|engine (prop)=[[Pratt & Whitney R-2800]]-9
|swept area note=
|type of prop=[[radial engine]]s
|volume m3=<!-- lighter-than-air -->
|power main=2,000 hp
|volume ft3=<!-- lighter-than-air -->
|power alt=1,500 kW
|volume note=
|performance header=Performance (estimated)
|aspect ratio=<!-- sailplanes -->
|max speed main=280 mph
|airfoil=
|max speed alt=450 km/h
|empty weight kg=
|range main=2,900 mi
|empty weight lb=
|range alt=4,600 km
|empty weight note=
|ceiling main=33,500 ft
|gross weight kg=
|ceiling alt=10,200 m
|climb rate main=
|gross weight lb=
|climb rate alt=
|gross weight note=
|max takeoff weight kg=
|loading main=
|max takeoff weight lb=
|loading alt=
|max takeoff weight note=
|power/mass main=0.12 hp/lb
|fuel capacity=
|power/mass alt=200 W/kg
|lift kg=<!-- lighter-than-air -->
|lift lb=<!-- lighter-than-air -->
|lift note=
|more general=
<!--
Powerplant
-->
|eng1 number=2
|eng1 name=[[Pratt & Whitney R-2800-9]]
|eng1 type=
|eng1 kw=<!-- prop engines -->
|eng1 hp=<!-- prop engines -->
|eng1 shp=2000
|prop blade number=4
|prop name=constant-speed propellers
|prop dia m=<!-- propeller aircraft -->
|prop dia ft=<!-- propeller aircraft -->
|prop dia in=<!-- propeller aircraft -->
|prop dia note=
<!--
Performance
-->
|max speed mph=280
|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=2900
|range nmi=
|range note=
|combat range km=
|combat range miles=
|combat range nmi=
|combat range note=
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=<!-- if range unknown -->
|ceiling ft=33500
|ceiling note=
|g limits=<!-- aerobatic -->
|roll rate=<!-- aerobatic -->
|glide ratio=<!-- sailplanes -->
|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude=
|sink rate ms=<!-- sailplanes -->
|sink rate ftmin=<!-- sailplanes -->
|sink rate note=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|disk loading kg/m2=
|disk loading lb/sqft=
|disk loading note=
|fuel consumption kg/km=
|fuel consumption lb/mi=
|power/mass={{cvt|0.12|hp/lb}}
|thrust/weight=

|more performance=
<!--
Armament
-->
|guns=<br>
|guns=<br>
** 3 × .30 in (7.62 mm) [[machine gun]]
** 3 × {{cvt|.30|in}} [[machine gun]]s
** 1 × .50 in (12.7 mm) machine gun</ul>
** 1 × {{cvt|.30|in}} machine gun
|bombs=>4,000 lb (1,800 kg)
|bombs=>{{cvt|4000|lb}}
}}
}}


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==References==
==References==
{{Reflist}}
{{commonscat|Glenn L. Martin Company}}
*[http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2573 USAF Museum]


{{Martin aircraft}}
{{Martin aircraft}}
{{USAF bomber aircraft}}
{{USAF bomber aircraft}}
{{aviation lists}}


[[Category:United States bomber aircraft 1940–1949|Martin B-27]]
[[Category:Martin aircraft|B-27]]
[[Category:Martin aircraft|B-27]]
[[Category:1940s United States bomber aircraft|Martin B-27]]

[[Category:Twin piston-engined tractor aircraft]]
{{aero-1940s-stub}}
[[Category:High-wing aircraft]]
[[Category:Aircraft with retractable tricycle landing gear]]
[[Category:Cancelled military aircraft projects of the United States]]

Latest revision as of 01:36, 11 November 2024

XB-27
General information
TypeHigh-altitude medium bomber
National originUnited States
ManufacturerGlenn L. Martin Company
History
Developed fromMartin B-26 Marauder

The Martin XB-27 (Martin Model 182) was an aircraft proposed by the Glenn L. Martin Company to fill a strong need in the United States Army Air Corps for a high-altitude medium bomber. Its design was based approximately on that of Martin's own B-26 Marauder. The XB-27 remained on paper, and no prototypes were built.

Specifications (as designed)

[edit]

Data from [1]

General characteristics

  • Crew: 7
  • Length: 60 ft 9 in (18.52 m)
  • Wingspan: 84 ft 0 in (25.60 m)
  • Height: 20 ft 0 in (6.10 m)
  • Powerplant: 2 × Pratt & Whitney R-2800-9 , 2,000 shp (1,500 kW) each
  • Propellers: 4-bladed constant-speed propellers

Performance

  • Maximum speed: 280 mph (450 km/h, 240 kn)
  • Range: 2,900 mi (4,700 km, 2,500 nmi)
  • Service ceiling: 33,500 ft (10,200 m)
  • Power/mass: 0.12 hp/lb (0.20 kW/kg)

Armament

  • Guns:
    • 3 × .30 in (7.6 mm) machine guns
    • 1 × .30 in (7.6 mm) machine gun
  • Bombs: >4,000 lb (1,800 kg)

See also

[edit]

Related development

Aircraft of comparable role, configuration, and era

Related lists

References

[edit]
  1. ^ Heyman, Jos (2015). UNITED STATES MILITARY AIRCRAFT : Air Force : B=Bomber.
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