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Ultralight Flight Mirage

uf-mirage


Designed by John Dempsey, the Mirage is another microlight, which holds the distinction of having been an outstanding new design at Oshkosh. Similar in appearance to the Quicksilver, it has a wing with both upper and lower surfaces. Three-axis controls and double-surface wings with droop tips, which are kingpost and cable braced. POWERPLANT: Two-cylinder Cuyuna has 2.0 reduction and is mounted in front below the wing. Drive shaft runs 58x27-inch pusher prop. LANDING GEAR: Tricycle gear has tail skid and 10-inch wheels.

The Ultralight Flight Mirage Mk.II is a single-seat single-engined high-wing monoplane with conventional three-axis control. Wing has unswept leading and trailing edges, and constant chord; cruciform tail. Pitch control by elevator on tail; yaw control by fin-mounted rudder; roll control by spoilers; control inputs through stick for pitch/roll and pedals for yaw. Wing braced from above by kingpost and cables, from below by cables; wing profile; double-surface. Undercarrige has three wheels in tricycle formation, with additional tailskid; suspension on nosewheel and bungee suspension on main wheels. No ground steering (Optional: Push-right go-right nosewheel steering connected to yaw control). No brakes. Aluminium-tube framework, with optional pod. Engine mounted above wing driving tractor propeller. Only certified aircraft-grade materials and fittings.

Inspired by the Humbug from Klaus Hill and with a very similar structure to the Vector 600 (on which Frank-lyn J Riley of Ultralight Flight worked) the Mirage has enjoyed considerable success since its first public presentation at Sun 'n' Fun in 1981 at Lakeland, Florida, where it won the prize for the most outstanding design.

The first Mirage was fitted with two Yamaha KT100S engines of 15 hp each, with their belts forming an inverse-V to drive a single twin-blade propeller. The aircraft was next fitted as standard with a Cuyuna 430R 30 hp engine, which was replaced on the Mirage MkII, appearing in 1982, by the Kawasaki TA440 of 38.5hp, the Cuyuna 430RL becoming an option. On the MkII, the reduction drive connects to an enclosed drive shaft and the cable controls for the elevators are replaced by Teleflex. Ultralight Flight insists that Mirage uses only certified aircraft grade materials and fittings.

The MkII was sold as a kit requiring 40 h for completion, according to Ultralight Flight, at a price of $4795 in 1983. The options include principally, an instrument panel, floats (Sealord $1095, Spaulding $1295), wheel fairings $117, steerable nosewheel $165, and a pod.

Mk. I
Wingspan, 34 ft
Wing area, 140 sq.ft
Overall length, 17 ft
Empty weight, 219 lbs
Wing loading, 2.5 Ibs/sq.ft
L/D power-off glide ratio, 9:1
Cruise speed, 45-50 mph
Stall speed, 20 mph
Fuel capacity, 4 USG
Engine displacement, 429cc
Rated HP, 30 hp

Mk.II
Engine: Kawasaki TA440A engine
Max power 35 hp at 5600 rpm
Prop-eller diameter and pitch 58 x 27 inch, 1.47x0.69m
V-belt reduction, ratio 2.0/1
Max static thrust 215 lb, 98 kg
Power per unit area 0.24 hp/sq.ft, 2.6hp/sq.m
Fuel capacity 4.0 US gal, 3.3 Imp gal, 15.1 litre
Length overall 19.5 ft, 5.94 m
Height overall 8.6ft, 2.61m
Wing span 32.0ft, 9.75m
Constant chord 4.5ft, 1.37m
Dihedral 8 deg
Sweepback 0 deg
Tailplane span 8.0ft, 2.44 m
Fin height 4.7ft, 1.43m
Total wing area 144 sq.ft, 13.4 sq.m
Total spoiler area 2.3 sq.ft, 0.21 sq.m
Fin area 4.1 sq.ft, 0.38 sq.m
Rudder area 9.5 sq.ft, 0.88 sq.m
Tailplane area 11.7 sq.ft, 1.09 sq.m
Total elevator area 11.7 sq.ft, 1.09 sq.m
Wing aspect ratio 7.1/1
Wheel track 4.0ft, 1.22m
Wheelbase 5.6ft, 1.70m
Nosewheel diameter overall 10 inch, 25 cm
Main wheels diameter overall 10 inch, 25 cm
Empty weight 246 lb, 112kg
Max take-off weight 500 lb, 227 kg
Payload 254 lb, 115 kg
Max wing loading 3.47 lb/sq.ft, 16.9 kg/sq.m
Max power loading 14.3 lb/hp, 6.5 kg/hp
Load factors; +5.6, -2.8 ultimate
Max level speed 65 mph, 105 kph
Never exceed speed 70 mph, 113 kph
Max cruising speed 50 mph, 80 kph
Economic cruising speed 45 mph, 72 kph
Stalling speed 25 mph, 40 kph
Max climb rate at sea level 1000 ft/min, 5.1 m/s
Min sink rate 430 ft/min at 29 mph, 2.2 m/s at 46 kph
Best glide ratio with power off 8/1 at 26 mph, 42kph
Take-off distance 100ft, 30 m
Land-ing distance 100ft, 30m
Service ceiling 14,500 ft, 4420 m
Range at average cruising speed 105 mile, 169 km

Engine: Rotax 429cc
Rated hp 30
2.0 reduction
Mmounted in front below the wing
58’ x27” pusher prop
Wingspan 34’
Wing area 140 sq.ft
Overall length 17’
Empty weight 219 lbs
Wing loading 2.5 lbs/sq.ft
L/D power-off glide ratio 9:1
Cruise speed 45-50 mph
Stall speed 20 mph
Fuel capacity 4 USG

 

 


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