{{Short description|Aircraft engine}} <!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. --> {{infobox aero engine |name= R-600 Challenger |image = File:Curtiss Challenger R-600, 2-Row, Radial 6 Engine - DPLA - 09e014f2ef108aeaf0023ebcae8461a3 (page 1).jpg |caption = Preserved R-600 engine |engine_type= [[Radial engine]] |national_origin = |manufacturer= [[Curtiss Aeroplane and Motor Company]] |first_run= 1920s |major_applications= |number_built = |developed_from = |developed_into = |variants_with_their_own_articles = }}

The '''Curtiss R-600 Challenger''' was a six-cylinder, double-row, air-cooled, radial engine for aircraft use built in the United States in the late 1920s. It developed {{convert|170|to|180|hp|kW|0}}.

==Design and development== Curtiss started work on a small six-cylinder engine in May 1927.{{sfn|Nutt|1928|p=840}} The engine was unusual in its design with aluminium cylinders mounted at 60°, so that it was in effect two staggered three cylinder engines.{{sfn|Nutt|1928|p=809}} The engine was first run in December 1927, and was taken to market producing between {{convert|170|and|180|hp|kW|0}} at 1,800&nbsp;rpm.{{sfn|Nutt|1928|p=840}}

==Applications== * [[ANBO VI]] * [[Consolidated XPT-5]] * [[Curtiss Robin]] * [[Curtiss-Wright CW-14 Osprey|Curtiss-Wright CW-14C Travel Air]] * [[Hodkinson HT-1]] * [[Rearwin 2000]]

==Specifications (R-600)== {{pistonspecs| <!-- If you do not understand how to use this template, please ask at [[Wikipedia talk:WikiProject Aircraft]] --> <!-- Please include units where appropriate (main comes first, alt in parentheses). If data are missing, leave the parameter blank (do not delete it). For additional lines, end your alt units with )</li> and start a new, fully formatted line with <li> --> |ref=''Nutt, 1928 p.842''{{sfn|Nutt|1928|p=842}} |type=Six-cylinder, double-row, radial engine |bore=5.125 in (130.2 mm) |stroke=4.875 in (123.8 mm) |displacement=603.4 cu in (9.89 L) |length= |diameter=42.625 in (1082.7 mm) |width= |height= |weight=420lb (190.5 kg) |valvetrain= |supercharger= |turbocharger= |fuelsystem= |fueltype= |oilsystem= |coolingsystem=Air-cooled |power=170 hp (127 kW) at 1,800 rpm |specpower= |compression= |fuelcon= |specfuelcon= |oilcon= |power/weight=

|designer= |reduction_gear=

|general_other= |components_other= |performance_other= }}

==See also== {{aircontent <!-- other related articles that have not already linked: --> |see also=

<!-- designs which were developed into or from this aircraft: --> |related=

<!-- relevant lists that this aircraft appears in: --> |lists= *[[List of aircraft engines]] <!-- For aircraft engine articles. Engines that are of similar to this design: --> |similar engines= *[[Bristol Jupiter]] *[[Continental R-670]] *[[Pratt & Whitney R-985 Wasp Junior]] <!-- See [[WP:Air/PC]] for more explanation of these fields. --> }}

==References== ===Citations=== {{reflist}}

==Bibliography== {{Commons category}} * {{cite journal|last=Nutt|first=Arthur|title=The Curtiss "Challenger"|journal=Aviation|date=8 September 1928|pages=808–842}} * [https://web.archive.org/web/20130330024612/http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=824 USAF museum]

{{Curtiss aeroengines}} {{US military piston aeroengines}}

[[Category:Curtiss aircraft engines|R-600]] [[Category:1920s aircraft piston engines]] [[Category:Aircraft air-cooled radial piston engines]] [[Category:Six-cylinder engines]]