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Feathered propeller on the outboard TP400 turboprop of an Airbus A400M. On most variable-pitch propellers, the blades can be rotated parallel to the airflow to stop rotation of the propeller and reduce drag when the engine fails or is deliberately shut down. This is called feathering, a term borrowed from rowing. On single-engined aircraft ...
The TP400 large propeller would still have enough ground clearance with the engine installed on the A340 low-mounted wing. [13] A400M showing its counter-rotating propellers on each wing. A small difference in the propeller gearboxes is required to make them go in opposite directions, namely the addition of an idler gear in two of them.
The Airbus A400M Atlas [nb 1] is a European four-engine turboprop military transport aircraft.It was designed by Airbus Military, now Airbus Defence and Space, as a tactical airlifter with strategic capabilities to replace older transport aircraft such as the Transall C-160 and the Lockheed C-130 Hercules. [3]
Ratier-Figeac is an aircraft components manufacturer in Figeac, France.. From 1926 until 1930 it also built a car with a 746 cc overhead camshaft engine.. From 1959 until 1962 Ratier made motorcycles, having taken over the motorcycle business of the Centre d'Études de Moteurs à Explosion et à Combustion ().
The first engine run with propeller took place in 2006, with the first flight of the TP400 aboard a testbed taking place in 2008. The first flight of the A400M took place in 2009. [10] Two years later the TP400 engine received EASA certification. [11] The first engines were delivered in 2012. The French Air Force began using the A400M in 2013. [4]
The A400M can transport helicopters or more than 200 people, as in the 2021 Kabul evacuation. It can land on beaches or short runways and, thanks to air-to-air refueling, fly across the world.
This is achieved by use of a constant-speed unit (CSU) or propeller governor, which automatically changes the propeller's blade pitch. Most engines produce their maximum power in a narrow speed band. The CSU allows the engine to operate in its most economical range of rotational speeds , regardless of whether the aircraft is taking off or cruising.
Swept propeller Scimitar propeller on a 1926 Alexander Eaglerock Eight-blade scimitar propellers on the Airbus A400M Atlas. A scimitar propeller is a type of propeller that has curved blades with increasing sweep along the leading edge. Their name is derived from their visual similarity to the curved blades of scimitars.