- Design
- Operators
- Specifications
- References
{{short description|1920s American aircraft}}| name=R-4 | image= | caption= }}{{Infobox Aircraft Type | type=Racing | national origin=United States | manufacturer=Loening | designer= | first flight=10 January 1922 | introduced= | retired= | status= | primary user=US Army Air Service | number built=2 | unit cost= | developed from= | variants with their own articles=
}} |
The Loening R-4 was a racer aircraft built by Loening in the early 1920s. DesignThe R-4 featured a low-wing monoplane layout, and the Packard engine weighed three times the size of the aircraft and took up a quarter length of the R-4, nicknamed the "flying engine". Both R-4 racers (AS68559 and AS68560) were enterred in the 1922 Pulitzer Trophy race with poor results, being reported as "almost total flops". Operators- {{USA}}
- United States Army Air Service
Specifications{{Aircraft specs
|ref=[1], Airwar : Loening R-4[2]
|prime units?=met
|crew=1
|length ft=23
|length in=6
|span ft=26
|span in=11
|height m=
|height ft=
|wing area sqft=
|aspect ratio=
|airfoil=
|empty weight lb=
|gross weight lb=3050
|max takeoff weight lb=
|fuel capacity=
|more general=
|eng1 number=1
|eng1 name=Packard 1A-2025
|eng1 type=V-12 water-cooled piston engine
|eng1 hp=600
|prop blade number=2
|prop name=fixed pitch propeller
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=
|max speed mph=170
|cruise speed mph=
|stall speed mph=
|never exceed speed mph=
|range miles=
|endurance=
|ceiling ft=
|g limits=
|roll rate=
|climb rate ftmin=
|time to altitude=
|wing loading lb/sqft=
|fuel consumption lb/mi=
|power/mass=
|more performance=
}}
References1. ^{{cite web |last1=Parmentier |first1=Bruno |title=Loening R-4 |url=http://aerofiles.com/_loening.html |website=aerofiles.com |accessdate=26 February 2019}}
2. ^{{cite web|url=http://www.airwar.ru/enc/law1/loeningr4.html |title=Loening R-4 |publisher=Airwar.ru |date= |accessdate=2019-02-26 |language=russian}}
- {{cite book |last= Foxworth |first= Thomas |title=The Speed Seekers |year=1989 |publisher=Haynes Publishing |location=Somerset |isbn= 0854297669 |pages= }}
{{Loening aircraft}}{{USAAS racing aircraft}} 4 : United States sport aircraft 1920–1929|Low-wing aircraft|Single-engined tractor aircraft|Aircraft first flown in 1922 |