Engines – Power

Zdarsky Trike

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Zdarsky in Austria

Czechoslovakian engineering student Ivo Zdarsky escaped into Austria in a homemade ‘ultralight’ aircraft powered by a 2-cylinder car engine.

In 1984 the plane was confiscated by police but he bribed the police and got it back.

The student, wearing a bright yellow crash helmet, flew the craft only about 100 to 200 yards above the ground for the entire trip. He parked his homemade, 3-wheeled craft with a basket-like seat outside an Austrian Airlines hangar used for DC-9 jets and sat there until airport employees spotted him.

Police said the man took off from the town of Lozorno, about 6 miles inside Czechoslovakia, at 3 a.m. and landed at Vienna’s Schwechat airport about 4:45 a.m., a 25-mile trip. Police said the student told them he had planned his escape for a year, making secret test flights of the ultralight aircraft.

A witness said the student’s plane was powered by a 600-cubic centimeter, 2-cylinder engine and had a fuel tank taken from a Czechoslovak-made Java motorcycle. Ultralights are prohibited in Austria because of noise and environmental regulations.

The 24-year-old Ivo Zdarsky spoke fluent English and asked for political asylum and wanted to emigrate to the United States or Australia, police said.

Zdarsky was able to sell his plane to Checkpoint Charlie German museum that housed escape vehicles. Afterwards he moved to Los Angeles where he started his own company, called Ivoprop, which produced propellers of his own design.

Zbierański and Cywiński Biplane

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On the initiative of the Association of Technicians at the Technical Association in Warsaw in the autumn of 1909, Czeslaw Zbierański went to Paris to get acquainted with the aviation technique of the time. On his return, he designed a wooden plane using a pulling propeller engine, while the biplanes at that time had pushing propellers. After the approval of the project by Wheeler Zbierański left for France to buy materials. Having encountered a Voisin airplane with a steel tube construction, he decided to build a hull from the tube.

Stanisław Cywiński became Stanisław Cywiński’s co-worker, who in the spring of 1910 adapted the project to steel construction and elaborated on the design. The hull of the aircraft was built in the summer of 1910, in a shed on the premises of E. Krzemiński’s lamp factory at ul. Solec 103 in Warsaw. After the construction of the hangars of the Warsaw Aircraft Association “Awia” on the Mokotowskie Field, they moved in the early autumn of 1910 to the hangar No. 1. There construction was completed. In the autumn of 1910 Cywiński bought the engine for the plane.

The biplane was rectangular, double-girder, wooden construction panels, supported by steel pipe posts and crossed with wires. Canvas cover. Controls were only on the upper wing. Truss lattice made of steel pipes connected by screws. Tubes stiffened by ash rods. Rear hull triangular section. Trusses framed by wires. With fabric covering

In May 1911, while attempting to fly an improper connection of the wires to the spark ignition caused gasoline to burn and burn part of the airfoil. In the summer the plane was renovated.

On September 25, 1911, the plane was flown by Michał Scipio del Campo, flying 15-20 km, at a height of 50-60 m, within 15 minutes. The engine was too heavy and too weak, so the Gnome engine from the Morane-Borel aircraft belonging to M. Scipio del Campo was mounted.

When the Russian army took over at the beginning of 1912, the plane was evacuated by Russian lieutenant Krachowiecki, fictitiously buying it. Cywinski dismantled the engine, and Zbierański donated the craft to the Union of Students of the Lviv Polytechnic. The plane was transported to Cracow in 1912, where it was exhibited in the Oleander area and then stored for over a year. There at the beginning of the war in 1914, it burned down during the fire of the exhibition buildings.

Engine: ENV type D, 29 kW (39 – 40 hp)
Wingspan: 10 m
Length: 8.5 m
Height: 3.3 m
Wing area: 31-34 sq.m
Gross weight: 240 kg
Useful weight: 100 kg
Total weight: 340 kg
Speed: 70 km / h
Flight time: 1 h 30 min

Zavody

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Czechoslovakia
The Skoda company was the largest industrial organisation in Czechoslovakia in the 1920s, manufacturing engines of indigenous design alongside license-built Hispano-Suiza and Lorraine Dietrich aero engines, Dewoitine aircraft and Curtiss Reed propellers. Skodovy Zavody had a controlling interest in the Czech Avia company and in Ceskoslovenska Letecka Spolecnost, the Czech airline. Parent company has also made cars, firearms, etc.

Zaschka Helicopter

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In 1928 Zaschka carried out experiments with a two-rotor helicopter at Tempelhof Airport in Berlin.

“His [Engelbert Zaschka’s] plane, the first helicopter, which ever worked so successfully in miniature, not only rises and descends verticially, but is able to remain stationary at any height. Herr Zaschka is fully aware that the perfection of his invention will be the greatest forward step in aviation since the Wright brothers made their historical hop. As he pointed out, the danger of flying would immediately be decreased by at least 80 per cent, since four fifths of the accidents in flying occur either in the takeoff or in landing. […] A motor giving thirty to forty horsepower is installed in Zaschka’s present experimental machine. It is so delicately adjusted that he has been able to keep the plane at a height of several feet above the ground, with no movement either up or down.”

Source: German Plane Promises New Stunts in Air, The Bee. Danville, Virginia, USA, June 25, 1927, p. 16.

Zanzottera MZ 301

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The MZ301i has electronic fuel injection, twin electronic ignition, and electric start.

MZ 301
Cycle: 2 stroke
No cylinders: 1
Bore: 76 mm
Stroke: 69 mm
Compression: 9.3
Displacement: 939 cc
Cooling: Air
Ignition: DCDI
Reduction: Mechanical Integral damper 2.18:1 to 3.66:1
Dimension: 200 x 400 x 500 mm
Weight: 39 kg
Max pwr: 85 hp at 6500 rpm

Zanzottera MZ 201 / MZ 202 / Compact Radial Engines MZ 201 / MZ 202

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The Zanzottera MZ 201 and MZ 202 are a family of twin-cylinder, in-line two-stroke, dual ignition aircraft engines designed for ultralight aircraft and motor gliders. The engine was originally designed and produced by Zanzottera Technologies of Italy, but the design was sold, along with the rest of the company’s two-stroke ultralight aircraft engine line, to Compact Radial Engines of Surrey, British Columbia, Canada.

The MZ 202 was developed first as a 60 hp (45 kW) lightweight competitor to the liquid-cooled 64 hp (48 kW) Rotax 582. Later the MZ 201 was developed from the MZ 202 as a de-rated 45 hp (34 kW) version intended for motorgliders and single place ultralights that needed more power than the single-cylinder MZ 34.

The MZ 201 and 202 both have a cylinder barrels that are Nikasil-coated. The bore and stroke are the same as the single-cylinder MZ 34 engine. The MZ 201 features an optional recoil starter or electric starting, while the MZ 202 has electric starting only. The MZ 201 has a choice of a reduction drive belt or gearbox, while the MZ 202 offers just the gearbox with reduction ratios of 2.18, 2.55, 2.88, 3.11 or 3.66 to 1.

The unit cost for the MZ 201 in 2009 was US$4440, and the MZ 202 US$5560.

The owners manual acknowledges the limitations inherent in the design of the engine, stating:
This is not an aeronautic approved engine.
This engine has not been subjected to durability and safety tests in compliance with aeronautical standards and is not a certified engine. It is designed to be used in ULM or aeroplanes where engine failure will not produce serious consequences. The user must assume responsibility for all risks deriving from the use of this engine and must understand that this engine is subject to sudden failure. Engine failure may result in an emergency landing. Such accidents may cause serious material damage, injury and/or death. Never use an aircraft fitted with this engine in areas, conditions and altitudes that may cause problems if forced to land as a result of sudden engine failure.

Variants:
MZ 201
Twin-cylinder, air-cooled, two-stroke dual ignition 45 hp (34 kW) aircraft engine optimized for motorgliders and single place ultralights. Equipped with a single Tillotson carburetor.

MZ 202
Twin-cylinder, air-cooled, two-stroke dual ignition 60 hp (45 kW) aircraft engine. Equipped with dual Bing carburetors.

MZ 202i
Twin-cylinder, air-cooled, two-stroke dual ignition 67 hp (50 kW) aircraft engine. Equipped with electronic fuel injection, controlled by a computerized engine management system. No longer in production

Applications:

MZ 201
Belite Aircraft Superlite
SlipStream Scepter
Spacek SD-1 Minisport
Star Bee Light
Taggart GyroBee
Wings of Freedom Flitplane

MZ 202
ASAP Beaver Plus 2
Apex Cross 5
Mosquito Aviation XE
Sabre Wildcat
Star Bee Total Bee

Specifications:
MZ 202
Type: Twin-cylinder, two-stroke aircraft engine
Bore: 76 mm (2.99 in)
Stroke: 69 mm (2.72 in)
Displacement: 626 cc (38.20 cu in)
Length: 313.5 mm (12.34 in)
Width: 299.4 mm (11.79 in)
Height: 331.1 mm (13.04 in)
Dry weight: 38 kg (84 lb) with starter motor, two carburettors, fuel pump, cooling system and exhaust system.
Valvetrain: Reed valve induction
Fuel type: Premium auto fuel
Oil system: 50:1 oil to fuel, premixed
Cooling system: air-cooled
Reduction gear: RZ 2 gearbox with reduction ratios of 2.18, 2.55, 2.88, 3.11 or 3.66 to 1
Power output: 63 hp (47 kW) at 6250 rpm
Compression ratio: 9.1:1
Ignition: DCDI
Price 1998: 17530 Fttc

Zanzottera MZ 34 / MZ 35 / Compact Radial Engines MZ 34 / MZ 35

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The Zanzottera MZ 34 and MZ 35 are a family of single-cylinder, two-stroke, single ignition aircraft engines designed for powered paragliders, one and two place powered parachutes, single place ultralight trikes, light single place ultralight aircraft and motor gliders.

The engine was originally designed and produced by Zanzottera Technologies of Italy, but the design was sold, along with the rest of the company’s two-stroke ultralight aircraft engine line to Compact Radial Engines of Surrey, British Columbia, Canada.

The MZ 34 and 35 both have a cylinder barrel that is Nikasil-coated. The engine features a decompression channel to allow easier recoil starting, a tuned exhaust system and a belt-type reduction drive. Starting options include a recoil or electric starter.

Earlier versions produced 26 hp (19 kW) at 6250 rpm or 38 hp (28 kW) with a tuned exhaust at 6450 rpm. The current production engine is rated at 27.5 hp (21 kW) at 6250 rpm. Reduction ratios available are 1.84, 2.05, 2.14, 2.24 and 2.34 to 1.

The unit cost for the MZ 34 in 2009 was US$2840, and the MZ 35 US$3120.

The owners manual acknowledges the limitations inherent in the design of the engine, stating:
This is not an aeronautics approved engine.
This engine has not been subjected to durability and safety tests in compliance with aeronautical standards. It is designed to be used in paramotors and ULM or aeroplanes where engine failure will not produce serious consequences. The user must assume responsibility for all risks deriving from the use of this engine and must understand that this engine is subject to sudden failure. Engine failure may result in an emergency landing. Such accidents may cause serious material damage and injuries. Never use an aircraft fitted with this engine in areas or at conditions and altitudes which may cause problems if forced to land as a result of sudden engine failure.

Variants:

MZ 34
Single cylinder, two stroke single ignition aircraft engine optimized for powered paragliders, one and two place powered parachutes, single place ultralight trikes, light single place ultralight aircraft

MZ 35
Single cylinder, two stroke single ignition aircraft engine with a narrower profile, optimized for motor-gliders

Applications:
Aviastroitel AC-5M
Belite Aircraft Superlite
The Butterfly Super Sky Cycle
Earthstar Thunder Gull
Fly Products Power
North Wing ATF
Paramotor Inc FX5
Spartan DFS Trike

Specifications:
MZ 34
Type: Single cylinder, two-stroke aircraft engine
Bore: 76 mm (2.99 in)
Stroke: 69 mm (2.72 in)
Displacement: 313 cc (19.10 cu in)
Length: 296 mm (11.65 in)
Height: 410 mm (16.14 in)
Dry weight: 17 kg (37 lb) with engine mount and silent-block mountings, starter motor, manual starter, reduction drive and muffler
Valvetrain: Reed valve induction
Oil system: 50:1 oil to fuel, premixed
Cooling system: air cooled
Ignition: Electronic
Reduction gear: Poly-V Belt drive with optional ratios of 1.84, 2.05, 2.14, 2.24 or 2.34 to 1
Power output: 27.5 hp (21 kW) at 6250 rpm
Max torque: 35 hp at 4100 rpm
Compression ratio: 9.6:1
Price 1998: 149 00 Fttc