View source for Engineering:Martin P7M SubMaster

{|{{Infobox Aircraft Begin
  |name = P7M
  |caption = 
  |image = 
}}{{Infobox Aircraft Type
  |type = anti-submarine warfare (ASW) [[Engineering:Flying boat|flying boat]]
  |manufacturer = [[Company:Glenn L. Martin Company|Glenn L. Martin Company]]
  |designer = 
  |first flight = 
  |introduced =
  |retired =
  |status = 
  |primary user = United States Navy
  |more users =
  |produced =
  |number built = 0 (mock-up only)
  |unit cost =
  |program cost = 
  |variants with their own articles =
}}
|}

The '''Martin P7M''' was an unbuilt [[Engineering:Aircraft|aircraft]] designed by the [[Company:Glenn L. Martin Company|Glenn L. Martin Company]] in the 1950s. The design was initiated to meet a requirement of the United States Navy (USN) for an anti-submarine warfare [[Engineering:Flying boat|flying boat]].

==Design and development==
The design was for a [[Engineering:Flying boat|flying boat]] that would make use of [[Physics:Boundary layer control|boundary layer control]] (BLC) to achieve slow speed flight. It was intended that this would enable the aircraft to land on the open ocean in rough seas and deploy a dipping sonar. Martin proposed a variant of the P5M Marlin, the P5M-3, to take advantage of this phenomenon. 

Martin continued development of the P5M-3 under the designation P7M Submaster, introducing two General Electric J85 BLC gas generators, one in the rear of each outer engine nacelle. A mock-up was built, but the P7M, [[Engineering:Convair XP6Y|Convair XP6Y]] and [[Engineering:Grumman G-132|Grumman G-132]] were all cancelled when the US Navy abandoned their open-ocean seaplane requirement.<ref name=Johnson>{{cite book |last1=Johnson |first1=E.R. |title=American flying boats and amphibious aircraft : an illustrated history |date=2009 |publisher=McFarland & Co. |location=Jefferson, N.C. |isbn=978-0786439744|pages=349–353}}</ref>

==Specifications (P7M projected)==
{{Aircraft specs
|ref=<!-- reference -->
|prime units?=imp

|genhide=

|crew=
|capacity=
|length ft=136
|span ft=111
|span in=7
|height ft=39
|wing area sqft=2500
|aspect ratio=
|airfoil=
|empty weight kg=
|empty weight lb=
|empty weight note=
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity=
|more general=

|eng1 number=4
|eng1 name=Wright R-1820-42
|eng1 type=radial piston engines
|eng1 kw=
|eng1 hp=1525
|eng1 note=

|eng2 number=2
|eng2 name=General Electric YJ85-GE-1
|eng2 type=turbojet
|eng2 kn=
|eng2 lbf=
|eng2 note=gas generators for BLC in rear of outer nacelles

|more power=

|prop blade number=
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=

|perfhide=

|max speed kts=350
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=
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|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 nmi=1200
|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=
|ceiling ft=25,300
|ceiling note=service ceiling
|g limits=
|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=
|fuel consumption kg/km=
|fuel consumption lb/mi=
|power/mass=
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|more performance=

|armament=* Missiles, bombs, and depth charges on external hard-points 
|guns= 
|bombs= 
|rockets= 
|missiles= 
|hardpoints=
|hardpoint capacity=
|hardpoint rockets=
|hardpoint missiles=
|hardpoint bombs=
|hardpoint other=

|avionics=
}}

==References==
{{reflist}}


[[Category:Flying boats]]
[[Category:Parasol-wing aircraft]]

{{Sourceattribution|Martin P7M SubMaster}}