Caudron C.51
| {{Infobox aircraft begin
|name=C.51 |image= |caption= }}{{Infobox aircraft type |type=Floatplane |manufacturer=Caudron |designer= |first flight=1921 |introduced= |retired= |status= |primary user= |more users= |produced= |number built=1 |unit cost= |developed from= |variants with their own articles= }} |
The Caudron C.51 was a French biplane floatplane made by Caudron in the early 1920s.
One C.51 was built, powered by a {{cvt|130|hp|kW}} Clerget engine and bearing the registration F-AIBL. It had an empty weight of {{cvt|538|kg|lb}} and a maximum speed of {{cvt|140|km/h|mph kn}}.{{cite book |title=Les Avions Caudrons |last=Hauet|first=André|year=2001|volume=1|publisher=Lela Presse|language=French|location=Outreau|isbn=2 914017-08-1|pages=151}}
It competed in the Monaco meeting in April 1921, piloted by Poirée. He won the first speed contest by flying the {{cvt|78|mi|km nmi}} course in 45 min 27 sec, an average speed of about {{cvt|99|mph|km/h kn}}, winning the 12,000 Franc prize.{{cite journal |date=21 April 1921 |title=The Monaco Seaplane Meeting|journal= Flight|volume=XIII |issue=16 |pages=276 |url=https://www.flightglobal.com/FlightPDFArchive/1921/1921%20-%200276.PDF}}
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