<!-- This article is a part of Wikipedia:WikiProject Aircraft. Please see Wikipedia:WikiProject Aircraft/page content for recommended layout. --> {{Infobox aircraft | name = Rey R.1 | logo = | logo_size = | image = Rey R.1.png | alt = | caption = The first Rey R.1. The dark oblique lines under the wings are the rubber hinges. | long_caption = | other_names = | aircraft_type = Experimental aircraft | aim = | outcome = | related = | national_origin = France | manufacturer = | design_group = | designer = Francois Rey | builder = | issuer = | status = | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = 2 | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = | retired = | first_flight = 16 December 1949 | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }}
The '''Rey R.1''' was an experimental twin engine aircraft type built in France around 1950 to test the effectiveness of sprung hinged wings in automatically correcting roll caused by gusts.
==Design and development==
In the 1930s there was some interest in aircraft designs with automatic gust stabilization, one example being the Italian Jona J-6. In 1938 Francois Rey and M. Ruoanet took out a patent on another stabilization method in which the wings could hinge near their roots along a line oblique to the span. This meant that when a tip dropped the wing hinged upwards, increasing its angle of attack and hence its lift, restoring the aircraft to level flight. An aircraft with this feature was built but destroyed during World War II.<ref name=GaillardI/><ref name=PopSci/><ref name=Flight/>
After the war Rey built a two-seat,<ref name=PopSci/> twin engine light aircraft to test the principle of the patent.<ref name=GaillardI/> Its low cantilever wing was tapered to rounded tips and had aspect ratio of 10 and noticeable dihedral. Renault 6Q {{convert|220|hp|kW|abbr=on|0|order=flip}} six cylinder air-cooled inverted inline engines were mounted on the wing undersides in deep long cowlings. The rubber disc sprung hinges began immediately outboard of the rear engine cowling on the wing trailing edge and ran forward and outward to the leading edge at about 45° to the chord. Black sealing strip shows their position in photographs. The R.1's long ailerons were mounted outboard of the hinge, starting close to the hinge connection with the trailing edge.<ref name=PopSci/><ref name=Flight/>
The rest of the R.1 was completely conventional with an oval fuselage, single seat enclosed cockpit and a second seat behind in a windowed cabin. The tailplane was straight edged and tapered with strong dihedral and carried twin vertical tails, oval in profile, at its extreme tips. It had a tailwheel undercarriage with the main wheels in spats on short faired vertical legs from the engine cowlings.<ref name=GaillardI/>
Two R.1s were built, numbered 01 and 02. 01 flew for the first time on 12 December 1949 and 02, which had enlarged fins, on 3 July 1951.<ref name=GaillardI/> 01 was exhibited in flight at the Le Bourget Fête in 1951, where it exhibited its flexing wings and braking parachute.<ref name=Flight/> No development or application followed these two aircraft.<ref name=GaillardI/>
==Variants== ;Rey R.1 01: First flown 6 December 1949. ;Rey R.1 02: As 01 but with larger fins. First flown 3 January 1951.
==Specifications== {{Aircraft specs |ref=Gaillard (1990) p. 96<ref name=GaillardI/> |prime units?=met <!-- General characteristics --> |genhide=
|crew=Two<ref name=PopSci/> |length m=9.20 |length note= |span m=13.175 |span note= |height m=3.65 |height note= |wing area sqm=19.33 |wing area note= |aspect ratio=<!-- sailplanes --> |airfoil= |empty weight kg=2550 |empty weight note= |gross weight kg=2950 |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |fuel capacity= |more general= <!-- Powerplant --> |eng1 number=2 |eng1 name=Renault 6Q |eng1 type=6-cylinder air-cooled inverted inline |eng1 hp=220 |eng1 shp=<!-- prop engines --> |eng1 note= |power original= |more power=
|prop blade number=2 |prop name= |prop dia m=<!-- propeller aircraft --> |prop dia ft=<!-- propeller aircraft --> |prop dia in=<!-- propeller aircraft --> |prop dia note=
<!-- Performance --> |perfhide=
|max speed kmh=325 |max speed note= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |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 km= |range miles= |range nmi= |range note= |endurance=<!-- if range unknown --> |ceiling m=5800 |ceiling note= |g limits=<!-- aerobatic --> |roll rate=<!-- aerobatic --> |glide ratio=<!-- sailplanes --> |climb rate ms= |climb rate ftmin= |climb rate note= |time to altitude= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |fuel consumption kg/km= |fuel consumption lb/mi= |power/mass=
|more performance=
}}
==References== <references>
<ref name=GaillardI>{{cite book |title=Les Avions Francais de 1944 à 1964|last=Gaillard|first=Pierre|year=1990|publisher=Éditions EPA|location=Paris|isbn=2-85120-350-9|page=96}}</ref>
<ref name=Flight>{{cite magazine|date=5 July 1951 |title= The Le Bourget Fête|magazine= Flight|volume=LX |issue=2215 |page=5 |url=http://www.flightglobal.com/pdfarchive/view/1951/1951%20-%201264.html}}</ref>
<ref name=PopSci>{{cite magazine |title=Knee Action Wings Cushion Ride In French Plane |magazine=Popular Science |date=April 1951 |page=150 |url=https://books.google.com/books?id=lCEDAAAAMBAJ&q=popular+science+1951+%22knee%22&pg=PA147 |accessdate=15 March 2015}}</ref>
</references> <!-- ==Further reading== --> <!-- ==External links== -->
Category:1940s French experimental aircraft Category:Twin piston-engined tractor aircraft Category:Low-wing aircraft Category:Aircraft first flown in 1949 Category:Aircraft with fixed conventional landing gear