View source for Grumman G-118

{{Short description|Proposed American interceptor}}
__NOTOC__
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
{{Infobox aircraft
 | name= G-118
 | image=
 | caption=
 | type= [[Fighter aircraft]]
 | national_origin=
 | manufacturer= [[Grumman]]
 | designer=
 | first_flight=
 | introduction=
 | retired=
 | status= Not built<ref name="Angel">Angelucci, 1987. p. 251.</ref>
 | primary_user= [[United States Navy]] (intended)
 | number_built=
 | developed_from= 
 | variants=
}}

The '''Grumman G-118''' (sometimes called the '''XF12F''', though this was never official<ref>Buttler p. 126</ref>) was a design for an all-weather missile-armed [[interceptor aircraft]] for use on [[United States Navy|US Navy]] [[aircraft carriers]]. Originally conceived as an uprated [[F11F Tiger]], it soon evolved into a larger and more powerful project. Although two prototypes were ordered in 1955, development was cancelled the same year in favor of the [[F4H Phantom II]] before any examples were built. Grumman's next (and last) carrier fighter would be the [[F-14 Tomcat]], ordered in 1968.
<!-- ==Development== -->

==Design==
The Grumman Design 118 was a two-seat, [[twinjet|twin-engined]], rocket augmented, carrier-based all-weather [[supersonic]] fighter aircraft. It had a 45° swept wing, a "T-tail" [[empennage]], two small folding ventral fins, and a landing gear of tricycle configuration. For ejection, the [[tandem]] crew were encapsulated and ejected downwards. It also featured a [[boundary layer control|boundary layer control system]] to improve low speed handling.

The G-118 was to be powered by two J79-GE-3 engines, with accommodations for the more powerful [[General Electric J79-GE-207|J79-GE-207]] engines each producing 18,000 lbf of afterburning thrust. Similar to the contemporary [[Vought XF8U-3 Crusader III]], it was designed with an additional throttleable [[Liquid rocket propellant|liquid-fueled]] [[rocket engine]] using a mixture of [[JP-4]] fuel and [[hydrogen peroxide]] oxidizer which produced 5,000 lbf of thrust.<ref name="SAC">{{cite web |title=Standard Aircraft Characteristics: Design 118 |url=http://www.alternatewars.com/SAC/Grumman_Design_118_SAC_-_12_December_1955_(Tommy).pdf |publisher=Grumman |access-date=22 December 2018 |date=12 December 1955}}</ref>

Armament stores would have been under the fuselage in two semi-recessed hardpoints for the [[AIM-7 Sparrow]] [[air-to-air missile]] and an internal weapons bay for an additional AIM-7 or three [[AIM-9 Sidewinder]] missiles.
<!-- ==Operational history== -->
<!-- ==Variants== -->
<!-- ==Units using this aircraft/Operators (choose)== -->

==Specifications (G-118, as designed)==
{{Aircraft specs
|ref=<ref name="Angel"/> and Standard Aircraft Characteristics<ref name="SAC"/>
|prime units?=kts
<!--
        General characteristics
-->
|genhide=

|crew=2
|length ft=57
|length in=7
|span ft=43
|span in=11.69
|height ft=14
|height in=10
|wing area sqft=595
|empty weight lb=26,355
|gross weight lb=37,366
|max takeoff weight lb=51,216
|fuel capacity=
|more general=
<!--
        Powerplant
-->
|eng1 number=2
|eng1 name=[[General Electric J79|J79-GE-3]]
|eng1 type=after-burning [[turbojet]] engines
|eng1 lbf=10000
|eng1 lbf-ab=15600

|eng2 number=1
|eng2 name=throttleable 
|eng2 type=[[rocket engine]]
|eng2 lbf=5000
<!--
        Performance
-->
|perfhide=

|max speed kmh=
|max speed mph=
|max speed mach=2
|cruise speed kmh=<!-- if max speed unknown -->
|cruise speed mph=<!-- if max speed unknown -->
|stall speed kmh=<!-- aerobatic and STOL aircraft -->
|stall speed mph=<!-- aerobatic and STOL aircraft -->
|range km=
|range miles= 1556
|endurance=<!-- if range unknown -->
|ceiling m=18,288
|ceiling ft=60,000
|g limits=<!-- aerobatic aircraft -->
|roll rate=<!-- aerobatic aircraft -->
|climb rate ms=
|climb rate ftmin=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=62.8
|wing loading note=
|more performance=
<!--
        Armament
-->
|rockets=2 x [[AIR-2 Genie]] unguided nuclear rockets ''or''
|missiles=<br>
** 3 × [[AIM-7 Sparrow]] III missiles <br> ''or''
** 2 × [[AIM-7 Sparrow]] ''and''
** 3 × [[AIM-9 Sidewinder]]
|avionics=
}}

==See also==
{{aircontent
<!-- include as many lines are appropriate. additional lines/entries with carriage return. -->
|see also=
|related=
* [[Grumman F-11 Tiger]]
|similar aircraft=
* [[McDonnell Douglas F-4 Phantom II]]
* [[Vought XF8U-3 Crusader III]]
|lists=
* [[List of fighter aircraft]]
* [[List of military aircraft of the United States]]
}}

==References==
===Notes===
{{Reflist}}

===Bibliography===
* {{cite book |title=The Illustrated Encyclopedia of Aircraft |title-link=Illustrated Encyclopedia of Aircraft |location=London |publisher=Aerospace Publishing}}{{Full citation needed|date=August 2023}} (Magazine)
* {{cite book |last= Angelucci |first= Enzo |title=The American Fighter from 1917 to the Present |year=1987 |location=New York |publisher=Orion Books }}
* {{cite book |title=World Aircraft Information Files |title-link=World Aircraft Information Files |location=London |publisher=Bright Star Publishing}}{{Full citation needed|date=August 2023}} (Magazine)
* {{cite book |last= Buttler |first=Tony |year= 2008 |orig-year=First published in 2007 |title=American Secret Projects: Fighters & Interceptors 1945-1978 |location=Hinckley, England, UK |publisher=Midland Publishing |isbn=978-1-85780-264-1 }}
* {{cite magazine |last=Pelletier |first=Alain J. |date=May–June 2000 |title=Grumman That Never Was: The XF12F—A Tomcat That Never Was |magazine=[[Air Enthusiast]] |issue=87 |pages=10–11 |issn=0143-5450}} 
* {{cite book |last=Taylor |first=Michael J. H. |year=1989 |title=Jane's Encyclopedia of Aviation |location=London |publisher=Studio Editions}}

== External links ==
* {{Commons category inline|Grumman military aircraft}}

{{Grumman aircraft}}
{{USN fighters}}

[[Category:Grumman aircraft|G-118]]
[[Category:Cancelled military aircraft projects of the United States]]
[[Category:Carrier-based aircraft]]
[[Category:Mid-wing aircraft]]
[[Category:Twinjets]]
[[Category:Aircraft with retractable tricycle landing gear]]