Martin XB-16
{{short description|American bomber project}}
{{Refimprove|date=April 2017}}
{{Infobox aircraft
|name = XB-16
|image =
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|alt =
|type = Bomber
|national_origin = United States
|manufacturer = Glenn L. Martin Company
|design_group =
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|status = Project only – canceled
|program cost =
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The Martin XB-16, company designation Model 145, was a projected heavy bomber designed in the United States during the 1930s.
Design and development
The XB-16 was designed to meet the United States Army Air Corps (USAAC) request for a bomber that could carry {{convert|2,500|lb|kg|abbr=on}} of bombs {{convert|5000|mi|km nmi|abbr=on}}.
The XB-16 (Model 145A) was to use four Allison V-1710 liquid-cooled reciprocating V-engines; contemporary American aircraft used air-cooled radial engines.
In 1935, Martin revised the XB-16 design as the Model 145B. The wingspan was increased from {{convert|140|ft|m|abbr=on}} to {{convert|173|ft|m|abbr=on}}, and a set of V-1710 engines added to the trailing edge. This version had a wingspan 20% greater than that of the B-29 Superfortress, the first operational bomber that would fill the role intended for the XB-16.
The XB-16 was canceled for essentially the same reason that the Boeing XB-15 project was, as it was not fast enough to meet the requirements set by the Army. Since both were canceled around the same time, Martin did not have time to produce an XB-16.
Specifications (Model 145A)
{{Aircraft specs
|ref=U.S. bombers, 1928 to 1980s{{cite book|last1=Jones|first1=Lloyd S.|title=U.S. bombers, 1928 to 1980s|date=1984|publisher=Aero Publishers|location=Fallbrook, CA|isbn=978-0-81689130-6|edition=4th|url-access=registration|url=https://archive.org/details/usbombers1928to100jone}}
|prime units?=imp
|crew=ten
|capacity=
|length m= 35
|length ft=
|length in=
|length note=
|span m=
|span ft=140
|span in=
|span note=
- :Model 145B: {{convert|173|ft|m|abbr=on}}
|height m=
|height ft=
|height in=
|height note=
|wing area sqm=
|wing area sqft=
|wing area note=
{{convert |50,660|lb|kg|abbr=on}}
|gross weight kg=
|gross weight lb=65000
|gross weight note=
- :Model 145B: {{convert|104880|lb|kg|abbr=on}}
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity={{convert|4238|USgal|l impgal|abbr=on}}
|more general=
|eng1 number=4
|eng1 name=Allison V-1710-3
|eng1 type=V-12 liquid-cooled piston engines
|eng1 kw=
|eng1 hp=1000
|eng1 shp=
|eng1 note=(Model 145B ×6)
|power original=
|thrust original=
|eng1 kn-ab=
|eng1 lbf-ab=
|prop blade number=
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=
|max speed kmh=
|max speed mph=237
|max speed kts=
|max speed note=at {{convert|20000|ft|m|abbr=on}}
|cruise speed kmh=
|cruise speed mph=140
|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=5000
|range nmi=
|range note=
|combat range km=
|combat range miles=3200
|combat range nmi=
|combat range note=with {{convert|12180|lb|kg|abbr=on}} of bombs
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=18 hours
|ceiling m=
|ceiling ft=22500
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=740
|climb rate note=
|time to altitude=
|sink rate ms=
|sink rate ftmin=
|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=0.049 hp/lb (0.080 kW/kg)
|thrust/weight=
|more performance=
|guns=
|bombs= {{convert|12180|lb|kg|abbr=on}} of bombs
}}
See also
{{aircontent
|similar aircraft=
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References
{{Reflist}}
External links
- [https://web.archive.org/web/20070825224517/http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2487 USAF Museum description of XB-16]
- [https://web.archive.org/web/20120225110916/http://www.marylandaviationmuseum.org/pdf/146_spec.pdf Martin aircraft 146 specifications]
{{Martin aircraft}}
{{USAF bomber aircraft}}
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Category:Four-engined piston aircraft
Category:Aircraft with retractable conventional landing gear
Category:Cancelled military aircraft projects of the United States