Shavrov SH-1 / SH-2

The Shavrov Sh-2 was developed from the small amphibian Sh-1 prototype design and performed its first flight on November 11, 1930, made from land. The Sh-1 remained a prototype.

The first Soviet mass-produced flying boat, the small, wooden Shavrov Sh-2 was a development of the Sh-1, with a more powerful engine and increased size.

The Sh-2 could carry two crew members as well as one passenger and during wintertime, the aircraft could be equipped with skis. The small lower wing served as attachment for the stabilizing floats. It was a light, simple and reliable design.

The Sh-2 passed State Acceptance trials for operation from water and land on June 12–17, 1934, without problems. Series productions was initiated on 1 April 1934, and ended two years later. However, due to its successful design and the popularity among its pilots, production was restarted in 1939. Total production was up to at least 700 aircraft, several hundred of those being built after 1939, possibly up to 1950.

The Sh-2 served throughout the Soviet Union as a utility transport, for liaison, and as a trainer, and for many years was used on fishery protection duties and frontier patrol work. They supported Arctic operations.

Sixteen were built under the designation Sh-2S as air ambulances carrying one or two stretcher patients.

In 1939 Aeroflot built additional Sh-2s from available spares and later the type was reinstated in production. As well as use for the civil roles indicated, the Sh-2 was flown by the V-VS as a general-purpose aircraft.

A number of later machines had a glazed crew cabin and other refinements, becoming redesignated Sh-2bis most had improved M-11L engines.

The aircraft was in service until 1964 and set a number of records among flying boats and seaplanes.

On 28 August 1942, the Finns captured two Sh-2s and pressed them into service in the liaison role, as well as carrying the Commander of the Finnish Air Force, until 1944.

One plane was constructed by cadets of Egorevsky aviation school of civil aircraft in the USSR, under the direction of teachers, during 1984-86. The plane was sold and delivered to the USA in the 1990s.

Shavrov Sh-2, at the Historic Aircraft Restoration Museum, Maryland Heights, Missouri, USA.

Shavrov SH-2
Engine: 1 × Shvetsov M-11A, 75 kW (100 hp)
Propeller: 2-bladed fixed-pitch
Wingspan upper: 13.0 m / 42 ft 8 in
Wingspan lower: 5.4 m / 17 ft 9 in
Wing area: 24.75 m² / 266 ft²
Length: 8.20 m (26 ft 11 in)
Height: 2.80 m (9 ft 2 in)
Empty weight: 680 kg (1,500 lb)
Max. takeoff weight: 937 kg / 2,065 lb Payload: 257 kg (567 lb)
Maximum speed: 140 km/h (87 mph, 76 kn)
Range: 400 km (250 mi, 220 nmi)
Service ceiling: 3,500 m (11,500 ft)
Crew: 1 pilot
Capacity 2 passengers / 257 kg / 567 lb

Sharp Tartan

Tartan/Nimrod

Single seat single engined flex wing aircraft with weight shift control. Rogallo wing with keel pocket. Pilot suspended below wing in trike unit, using bar to control pitch and yaw/roll by altering relative positions of trike unit and wing. Wing braced from above by kingpost and cables, from below by cables; floating cross tube construction with 70% double surface. Undercarriage has three wheels in tricycle formation; no suspension on any wheels. Push right go left nosewheel steering independent from yaw control. No brakes. Aluminium tube trike unit, with optional pod. Engine mounted below wing driving pusher propeller.

By 1982 four Tartan trike units have been made; three with 330 cc Robin engines and one with a 250.

The Tartan, so named because of its distinctive seat covering, is most commonly flown with an Airwave Nimrod wing and was largely inspired by the Ultrasports Tripacer. It is a beefier structure using heavier gauge tube, a cast engine bearer and solid plastic tubing inserts, to prevent bolts crushing the tubing.

While the Tartan is a thoroughly conventional trike unit, a high proportion is made in house not just the tubework but also the engine bearers, propeller, silencer and reduction drive.

Engine: Robin EC34PM
Propeller diameter and pitch 54×30 inch, 1.37×0.76m
Toothed belt reduction, ratio 2.3/1
Fuel capacity 2.4 US gal, 2.0 Imp gal, 9.1 litre
Length overall 11.8ft, 3.60m
Wing span 32.8ft, 10.0m
Nose angle 120 deg
Total wing area 165 sq.ft, 15.3 sq.m
Wing aspect ratio 6.5/1
Nosewheel diameter overall 16 inch, 41 cm
Main wheels diameter overall 16 inch, 41 cm
Max climb rate at sea level 650 ft/min, 13 m/s

Engine: Robin EC25PS
Propeller diameter and pitch 54×27 inch, 1.37×0.69m
Toothed belt reduction, ratio 2.3/1
Fuel capacity 2.4 US gal, 2.0 Imp gal, 9.1 litre
Length overall 11.8ft, 3.60m
Wing span 32.8ft, 10.0m
Nose angle 120 deg
Total wing area 165 sq.ft, 15.3 sq.m
Wing aspect ratio 6.5/1
Nosewheel diameter overall 16 inch, 41 cm
Main wheels diameter overall 16 inch, 41 cm

Sharp DR90 Nemesis

The Nemesis originated as an attempt by Jon Sharp to build a Shoestring racer, with composite skins over a steel frame. Along the way, Dan Bond convinced him to use an airfoil with extensive laminar flow and finally, Steve Ericson helped Jon design a sleeker, all composite airframe. All that remains of the original “plastic Shoestring” is the horizontal tail. The steel space frame was sold to Dan Gilbert and became the guts of his Shadow Formula One air racer. Although Shadow looks much like Nemesis it is fabricated differently and has a completely different wing.

The Formula One racing Sharp DR 90 Nemesis was built at the Mojave Airport by the Nemesis Air Racing Team. The aircraft is powered by a modified Continental O-200 piston engine.

Between 1991 and 1999, the plane won 45 of the 48 race events in which it was entered, including nine consecutive Reno Gold National Championships. During each of the race seasons from 1994 through 1999, Nemesis finished as the International Formula One points champion. Nemesis was awarded the George Owl Trophy for its design in 1991, three Louis Blèriot Medals from the Fédération Aéronautique Internationale (1993, 1996 and 1998), and four Pulitzer Trophies (1993, 1994, 1995 and 1999). The aircraft set 16 world speed records, and in one of those records, Nemesis was clocked at over 290 mph (467 km/h). Because of its successes, the National Air and Space Museum has described the plane as “the most successful aircraft in air racing history”.

After the end of the 1999 racing season, Jon Sharp donated the aircraft to the National Air and Space Museum and it is now on display at the NASM’s Steven F. Udvar-Hazy Center.

The success of the aircraft led Jon Sharp to design a follow-on type, the Nemesis NXT.

Variant: Rolls-Royce ACCEL

Engine: 1 × Continental O-200, 100 hp
Wingspan: 20 ft 6 in (6.25 m)
Wing area: 66 ft2 (6.13 m2)
Length: 18 ft 6 in (5.64 m)
Height: 3 ft 4 in (1.02 m)
Empty weight: 520 lb (236 kg)
Loaded weight: 770 lb (350 kg)
Fuel capacity: 5 US gal (18.9 liters)
Maximum speed: 292 mph (470km/h)
Stall speed: 90 Kias (167 km/h)
Crew: 1
G-Loading limits: +6, -4
Cabin height: 35 in (89 cm)

Shapley Kittiwake

Designed and built by Errol Spencer Shapley at Torquay, Devon, the Kittiwake was a two-seat monoplane with a gull wing and a fixed landing gear. The first aircraft, a Mark 1 registered G-AEZN (c/n ESS.1), with an open cockpit was powered by a 50 hp (37 kW) Continental A50 piston engine and first flown at Roborough in 1937. A Captain F Symodson was the test pilot. The second aircraft, a Mark 2 registered G-AFRP (c/n ESS.2), was a cabin monoplane powered by a 90 hp (67 kW) Pobjoy Niagara III engine and first flown at Roborough in 1938.

The Mark 1 aircraft was dismantled before the Second World War. The Mark 2 was stored during the war only to crash on Dartmoor in December 1946.

Kittiwake Mark 2
Engine: 1 × Pobjoy Niagara III, 90 hp (67 kW)
Wingspan: 32 ft 0 in (9.76 m)
Length: 20 ft 10 in (6.35 m)
Empty weight: 901 lb (409 kg)
Gross weight: 1600 lb (726 kg)
Cruise speed: 110 mph (176 km/h)
Crew: 1
Capacity: 1