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pusher and engine
Designed by the Indigenous People ’ s Technology and Education Center ( I-TEC ) of Florida, a Christian ministry, the 1100-pound ' Maverick ' vehicle is powered by a engine that can also drive a five-bladed pusher propeller.
In Germany around 1976, a pusher ducted fan airplane powered by a modified NSU multi-rotor Wankel engine was developed in both civilian and military versions, Fanliner and Fantrainer.
Late-model autogyros patterned after Igor Bensen's designs feature a rear-mounted engine and propeller in a pusher configuration.
A separate propeller provides forward thrust, and can be placed in a tractor configuration with the engine and propeller at the front of the fuselage ( e. g., Cierva ), or pusher configuration with the engine and propeller at the rear of the fuselage ( e. g., Bensen ).
The most common design is the pusher configuration, where the engine and propeller are located behind the pilot and rotor mast, such as in the Bensen " Gyrocopter ".
In 1908 U. S. inventor, businessman and engine builder Glenn Curtiss flew an aileron-controlled aircraft, with wingtip ailerons of a similar form to what the contemporaty Bleriot VIII used, and the famous 1911-vintage Curtiss Model D pusher biplane had interplane ailerons of a similar nature to those on the final form of the Santos = Dumont 14-bis.
Pilot visibility is often poorer due to the width of the engine, and the designer is limited in engine placement as ensuring adequate cooling air, either in a buried engine installation or in a pusher configuration is more difficult.
The radiation quickly turns the plastic foam that had been filling the channel into a plasma which is mostly transparent to X-rays, and the radiation is absorbed in the outermost layers of the pusher / tamper surrounding the secondary, which ablates and applies a massive force ( much like an inside out rocket engine ) causing the fusion fuel capsule to implode much like the pit of the primary.
; Diesel pusher: A motorcoach with its engine in the rear, instead of the front.
After development work, it was reengined with a Continental O-200 ( modified to include liquid cooling ) as the pusher engine and a Continental O-240 as the tractor engine.
* Loire-Nieuport LN. 30-single engine pusher training flying boat.
The pusher design had the engine and propeller behind the pilot, facing backward, rather than in front, as in a tractor type.
An important drawback was that pusher designs – because of the struts and rigging necessary to hold their tail units, and the extra drag this entailed – tended at best to have an inferior performance to tractor types with the same engine power.
In pusher buses, only the rear C-axle is powered by a rear-mounted internal combustion engine, and the longitudinal stability of the vehicle is maintained by active hydraulics mounted under the turntable.
In a craft with a pusher configuration ( more commonly, simply pusher ) the propeller ( s ) are mounted behind their respective engine ( s ).
According to Bill Gunston, a " pusher propeller " is one mounted behind engine so that drive shaft is in compression.
The classic " Farman " pusher had the propeller " mounted ( just ) behind the main lifting surface " with the engine fixed to the lower wing or between the wings, immediately forward of the propeller in a stub fuselage ( that also contained the pilot ) called a nacelle.
The so called push / pull layout, combining the tractor and pusher configurations ( that is – with one or more propellers facing forwards and one or more others facing back ) was another idea that continues to be used from time to time as a means of reducing the asymmetric effects of an outboard engine failing, such as on the Farman F. 222 but at the cost of a severely reduced efficiency on the rear propellers, which were often smaller and attached to lower powered engines as a result.

pusher and tractor
The main drawback was that the high drag of a pusher type's tail structure made it slower than a similar " tractor " aircraft.
First prototype used pusher propeller ; second prototype and production aircraft used tractor propellers.
Model airplane engines with reed-valves can be mounted in either tractor or pusher configuration without needing to change the propeller.
* Short S. 46 ( 1912 ) Twin-engined tractor / pusher monoplane, nicknamed the Double Dirty
Rutan developed a twin-engined ( piston engines, one pusher and one tractor ) canard-configured design, the Rutan model 76 Voyager.
The forward firing gun of a pusher " gun carrier " provided some offensive capability – the mounting of a machine gun firing to the rear from a two seater tractor aircraft gave defensive capability.
The main difficulty with this type of pusher design was attaching the tail ( empennage ); this needed to be in the same general location as on a tractor aircraft but its support structure had to avoid the propeller.
Well before the beginning of the First World War this drag was recognized as just one of the factors that would ensure that a Farman style pusher would have an inferior performance to an otherwise similar tractor type.
The U. S. Army banned pusher aircraft in late 1914 after several pilots died in crashes of aircraft of this type-so from about 1912 onwards the great majority of new U. S. landplane designs were tractor biplanes ; pushers ( of all types ) becoming regarded as old fashioned on both sides of the Atlantic.
Although the vast majority of propeller driven aircraft continue to be tractor configuration, there has been in recent years something of a revival of interest in pusher designs: in light homebuilt aircraft such as Burt Rutan's canard designs since 1975, ultralights such as the Quad City Challenger ( 1983 ), flexwings, paramotors, powered parachutes, and autogyros.
To convert a tractor engine and propeller combination to pusher operation it is not sufficient to simply turn the engine and propeller round, since the propeller would continue to " pull " driving the aircraft to the rear.
The loads on the thrust race ( bearings that prevent fore and aft movement of the crankshaft ) are also reversed, because the pusher propeller is pushing into the engine rather than pulling away from it as in a tractor.
: In contrast to tractor layout, a pusher propeller at the end of the fuselage is stabilizing.
: A pusher design with an empennage behind the propeller is structurally more complex than a similar tractor type.
An aircraft constructed with a tractor configuration has the engine mounted with the propeller facing forward, so that the aircraft is " pulled " through the air, as opposed to the pusher configuration, in which the propeller faces backward and " pushes " the aircraft through the air.
In the early years of powered aviation both tractor and pusher designs were common.
An aircraft constructed with a push-pull configuration has a mixture of forward-mounted ( tractor ) propellers and backward-mounted ( pusher ) propellers.
An early example of a " push-pull " aircraft was the Caproni Ca. 1 which had two wing-mounted tractor propellers and one centre-mounted pusher propeller.
They were fitted with a double thrust ball race, which enabled them to be used either as a pusher or as a tractor engine.

pusher and was
An alternative was to build a " pusher " scout such as the Airco DH. 2, with the propeller mounted behind the pilot.
However another study, had observed that pusher syndrome is also present in patients with left hemisphere lesions, leading to aphasia, providing a stark contrast to what was previously believed regarding hemispatial neglect, which mostly occurs with a right hemisphere lesion.
Firing through a moving propeller was solved in a variety of ways, including the interrupter gear, metal reinforcement of the propeller, or simply avoiding the problem with wing-mounted guns or having a pusher propeller.
In the thermonuclear Starfish Prime the fission yield was less than 100 % to begin with, and then the thicker outer casing absorbed about 95 % of the prompt gamma rays from the pusher around the fusion stage.
The idea of Orion was to react small directional nuclear explosives against a large steel pusher plate attached to the spacecraft with shock absorbers.
A simpler solid-pit design was considered more reliable, given the time restraint, but it required a heavy U-238 tamper, a thick aluminium pusher, and three tons of high explosives.
Initially lacking a synchronizer, the Royal Flying Corps relied on pusher aircraft such as the Vickers F. B. 5 Gunbus and the Airco D. H. 2 in which the propeller was behind the pilot, and therefore out of the way of forward firing guns.
One of Convair's most famous products was the 10-engined Convair B-36 strategic bomber, burning four turbojets and turning six pusher props driven by Pratt & Whitney R-4360 Wasp Major radial piston engines.
Artem Mikoyan was asked by the Soviet government, principally by the government's TsAGI aviation research department, to develop a test-bed aircraft to research the swept wing idea — the result was the late 1945-flown, unusual MiG-8 Utka pusher canard layout aircraft, with its rearwards-located wings being swept back for this type of research.
About half the weight of the typical Martlet 2 series projectile was in the pusher plate and centering sabot.
In this accident the crew had deliberately switched off the stick shaker and stick pusher to perform their stall tests, and the probable cause was determined to be the crew's failure to take timely positive recovery action to counter an impending stall.
Field was established during the building of the Canadian Pacific Railway ( CPR ) as a locomotive depot for pusher engines required to help trains over the nearby Field Hill and Big Hill.
His first design, executed while he was still at Bede, was the VariViggen, a two-seat pusher single-engine craft of canard configuration.
An unusual feature of Coronation Class tenders was that they were fitted with a steam-operated coal pusher to bring the coal down to the firing plate.
After meeting cheerleaders, Stacey ( Carmen Electra ) and Holly ( Amy Smart ), they learn from another cheerleader, Heather ( Brande Roderick ), who strips herself completely naked while preparing for her shower, that a jacket worn by the dead pusher was made by Big Earl ( Will Ferrell ).
No. 11 Squadron of the Royal Flying Corps was formed at Netheravon in Wiltshire on 14 February 1915 for " fighting duties ", receiving two seat pusher Vickers Gunbus fighters in June, and deploying to France on 25 July 1915.
This pioneering fighter, like the Royal Aircraft Factory F. E. 2b and the Airco DH. 1, was a pusher type.

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