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Monnet Sonerai II
Great Plains Soneri II

 

monson2mid


After enjoying success with his original VW-powered Sonerai, John Monnett decided to develop the Sonerai II, a tandem-seated version. Both pilot and passenger sit under a bubble canopy which is hinged on the right side. The Sonerai II differs mainly by being slightly larger, making use of a more powerful engine, and by being stressed for aerobatics when flown by the pilot alone.

monson2low
Sonerai IIL


The II-L is the same aircraft but with a "low-wing". The low-wing version is especially popular with 6 foot plus pilots, as the pilot legs go over the main spar carry through structure.

The Sonari II was also available as a low-wing nose gear two place, or the Sonerai II-Stretch: A low-wing model 18" longer than the original, as a low-wing taildragger and a low-wing tri-gear. The Sonerai II-LT is the steerable nose wheel version.

The Sonerai II series will accept VW power plants from 1700cc - 2276cc.

Price in 1982:  $2,742 (Excludes engine).

All models of the Sonerai II use a minimum of different sizes of materials to reduce the cost, without hampering the integrity of the design. The wing is all aluminum and is composed of two panels that easily fold along side the fuselage enabling the Sonerai II, II-L and II-LT to be towed tail first on its own gear. Stainless steel cherry rivets are used to skin the wing. The fuselage and tail surfaces are constructed of standard sizes of 4130 steel tubing that are fabric covered. All aluminum sheet used is 2024-T3 .025" except for the spars which are .040".

The fiberglass cowling removes easily to allow complete access to the engine, magneto, tank and instruments. The landing gear is a formed aluminum spring with 5" wheels and 3/4" axles. A tapered tailspring rod is used for the tailwheel (II and II-L) All Sonerai II's feature a l0 US gallon main tank with the option of a 6 gallon auxiliary tank carried on the passengers floor board (without passenger).

 

Monn-Son2-03

 

Sonari II
Engine: VW 1700 – 2180cc, 65-70-hp
Span: 18' 8"
Length: 18' 10"
Height: 5' 5"
Wing area: 84 sq.ft
Empty weight (no starter): 236 kg /520 lb
Useful load: 430 lb
MTOW Weight: 431 kg / 950 lbs
Wing loading at gross: 11.3 lb/sq.ft
Fuel capacity – std: 10 USG
Fuel capacity – opt: 6 USG
Seats: 2 tandem
Design limit at full gross: +/- 4 G
Aerobatic limit solo w/755 lb: +/- 6 G
Take off distance: 900 ft
Stall speed: 39 kt / 45 mph / 72 kmh
Landing speed: 58 mph
Maneuvering speed: 115 mph
Cruising spped at 75%: 122 kt / 140 mph / 225 kmh
Vne: 174 kt / 200 mph / 322 kmh
Range w/45 minute reserve: 245 sm
Rate of climb at gross: 500 fpm / 3 m/s
Takeoff run 900 ft
Take-off distance (50ft obstacle): 900 ft / 274 m
Landing roll 500 ft
Service ceiling: 14,000 ft
Seats: 2

Sonerai II-L
Engine: VW 2180cc, 70 hp
Max wt: 925 lbs
Empty wt: 510 lbs
Fuel capacity 10 USG
Height: 5.5 ft
Wingspan 18.8 ft
Length 18.7 ft
Climb rate: 500 fpm
Top speed: 175 mph
Cruise: 140 mph
Stall 45 mph
Range: 245 sm
Takeoff run: 900 ft
Landing roll: 900 ft
Service ceiling: 14,000 ft
Seats: 2
Wing area: 84 sq.ft
Tail wheel

Sonerai II-LS
Engine: VW 2180cc, 70 hp
Max wt: 1150 lbs
Empty wt: 540 lbs
Fuel capacity 10 USG
Height: 5.5 ft
Wingspan 20.4 ft
Length 18.7 ft
Wing area: 84 sq.ft
Climb rate: 700 fpm
Top speed 170 mph
Cruise 140 mph
Stall 50 mph
Range: 600 sm
Takeoff run: 700 ft
Landing roll: 900 ft
Service ceiling: 14,000 ft
Seats: 2
Tail wheel

Sonerai II-LT
Engine: VW 2180cc, 70 hp
Max wt: 1150 lbs
Empty wt: 540 lbs
Fuel capacity 10 USG
Height: 5.5 ft
Wingspan 18.8 ft
Length 20.4ft
Climb rate: 700 fpm
Top speed: 170 mph
Cruise 140 mph
Stall 50 mph
Range: 245 sm
Takeoff run: 700 ft
Landing roll: 900 ft
Service ceiling: 14,000 ft
Seats: 2
Wing area: 84 sq.ft
Nose wheel

Sonerai II-LTS
Engine: VW 2180cc, 70 hp
Max wt: 1150 lbs.
Empty wt: 540 lbs
Fuel capacity 10 USG
Height: 5.5 ft
Wingspan 20.4 ft
Length 18.7 ft
Wing area: 84 sq.ft
Climb rate: 700 fpm
Top speed 170 mph
Cruise 140 mph
Stall 50 mph
Range: 600 sm
Takeoff run: 700 ft
Landing roll: 900 ft
Service ceiling: 14,000 ft
Seats: 2
Nose wheel

 

Great Plains Soneri II
Empty weight: 227 kg
Wing span: 5.7 m
Wing area: 7.73 sq.m
Fuel capacity: 38 lt
Engine: VW 2100, 70 hp
MAUW: 522 kg
Seats: 2
Max speed: 282 kph
Cruise speed: 225 kph
Minimum speed: 80 kph
Climb rate: 3 m/s
Fuel consumption: 12 lt/hr
Plan price (1998): US$99.95
Kit price (1998): US$5500

 

 

 

 

 

 

 


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