- Design
- Development
- Specifications (Renard 120 engine)
- References
| name=Renard R.33 | image= | caption= }}{{Infobox Aircraft Type | type=Trainer aircraft | national origin=Belgium | manufacturer=Constructions Aéronautiques G. Renard | designer= | first flight=1934 | introduced= | retired= | status= | primary user= | more users= | produced= | number built=2 | program cost= | unit cost= | developed from= | variants with their own articles=
}} |
The Renard R.33 was a Belgian training aircraft with aerobatic capability. Two were flown in 1934 but no more were produced. DesignWhen the Renard R.33 design was begun, it was intended as a touring aircraft but as it progressed it became apparent that a more suitable rôle was as a trainer for military reserve pilots and crew. The R.33 allowed pilots to develop their aerobatics and the crew their navigational skills. It was a parasol wing monoplane, its wings braced to the lower fuselage with streamlined steel tube V-struts. The centre of the wing, thinner than the outer parts, was close to the fuselage and was braced there on short cabane struts. The plan was roughly elliptical, though the leading edge was straight over about half the span and there was a deep, rounded cut-out in the trailing edge to improve the pilot's field of view. There was no dihedral. The wing was all wood, built around a pair of box spars {{convert|600|mm|in|abbr=on}} apart and plywood covered. Its ailerons occupied almost 60% of the span. The R.33's fuselage was a slender steel tube structure, flat sided though with a rounded upper decking. Its pointed nose partially exposed the five cylinders of the {{convert|120|hp|kW|abbr=on|disp=flip}} Renard 120 radial engine. Engine and cockpit areas were covered with metal and the rest with fabric. A long forward fuselage provided a space between engine and cockpits for fuel tanks and baggage. The tandem open cockpits were raised enough for the pilots to be able to see both above and below the wing. Dual controls were fitted, though the forward set could be removed for a passenger. The empennage was conventional, with balanced control surfaces; the fin was small, with a large, rounded rudder that extended to the keel and the tailplane, mounted at mid-fuselage height and braced from below with two struts on each side, was far enough forward to keep the elevators clear of the rudder. The Renard had a fixed undercarriage with two mainwheels with axles on V-struts from the central lower fuselage. Faired {{convert|1500|mm|in|abbr=on}} long oleo struts were attached to the upper fuselage. The wheels had cable brakes; the pilot could choose to use them differentially operation for steering on the ground. There was a steel spring tailskid which could castor freely. DevelopmentThe exact date of the first flight of the Renard R.33 is not known but it was probably in the early summer of 1934. Apart from the Les Ailes article,[ there are no references to this Belgian aircraft in the contemporary Anglo-French aviation press. A reconstructed Belgian civil aircraft register shows two examples, the first (OO-ANT) registered on 1 May 1934 and the second (OO-ANV) on 10 August 1934.[6] The first, which had two registered owners after leaving Renard, had the Renard 120 uncowled engine][ but the second, which stayed with the company, had a wide chord, NACA type cowling as well as faired mainwheels. At one time this aircraft was fitted with a {{convert|120|hp|kW|abbr=on|disp=flip}} ADC Cirrus Hermes I four cylinder, upright inline.[8]] Specifications (Renard 120 engine){{Aircraft specs
|ref=Les Ailes 1934
|prime units?=met
|genhide=
|crew=Two
|capacity=
|length m=7.40
|length note=
|span m=12.00
|span note=
|height m=2.45
|height note=
|wing area sqm=18.50
|wing area note=
|aspect ratio=7.8
|airfoil=
|empty weight kg=520
|empty weight note=
|gross weight kg=795
|gross weight note=with normal fuel capacity
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity= normal {{convert|110|l|Impgal USgal|abbr=on}},{{convert|400|l|Impgal USgal|abbr=on}} with supplementary tank
|more general=
|eng1 number=1
|eng1 name=Renard 120
|eng1 type=5-cylinder radial
|eng1 hp=120
|eng1 note= at 1,800 rpm
|power original=
|thrust original=
|more power=
|prop blade number=2
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=
|perfhide=
|max speed kmh=195
|max speed note=at ground level
|cruise speed kmh=165
|cruise speed note= at 70% power
|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=65
|minimum control speed note=
|range km=
|range miles=
|range nmi=
|range note=
|combat range km=
|combat range miles=
|combat range nmi=
|combat range note=
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=4 hr with normal fuel, 15 hr with supplementary tank
|ceiling m=5750
|ceiling ft=
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude= 75 s to {{convert|360|km/h|mph|abbr=on}}
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|fuel consumption kg/km=
|fuel consumption lb/mi=
|power/mass=
|thrust/weight=
|more performance=
|armament=
|guns=
|bombs=
|rockets=
|missiles=
|hardpoints=
|hardpoint capacity=
|hardpoint rockets=
|hardpoint missiles=
|hardpoint bombs=
|hardpoint other=
|avionics=
}}References1. ^1 {{cite web |url=http://www.airhistory.org.uk/gy/reg_OO-.html|title=Golden Years |accessdate=5 March 2016}}
2. ^1 {{cite web |url=http://www.airwar.ru/enc/law1/renardr33.html|title=R.33 |accessdate=7 March 2016}}
}}{{Renard aircraft}} 5 : Belgian aircraft 1930–1939|Renard aircraft|Parasol-wing aircraft|Single-engined tractor aircraft|Aircraft first flown in 1934 |