HELI CLUB DU VENTOUX
The landing gear is a lot longer and wider is comparable helicopters on the market, it is designed like that to prevent dynamic rollover. The landing gear is also quite a bit higher than other helicopters and that is because the landing gear is designed to deform in case of a crash to protect the people inside the helicopter much like the crumple zone of a car.
The frame tubes are quite bit bigger than comparable helicopters on the market. which increases the empty mass of the helicopter but more importantly makes for a frame that is a lot more rigid. So even in the event of a severe crash the frame itself won't deform and protect the pilot and passenger.
Fuel is stored in two 32 liter tanks, one on each side of the frame. The tanks are made out a dense polymer that is very impact resistant. Multiple drop test have been preformed in which full fuel tanks are dropped unprotected from 10 feet with suffering any kind of damage or deformation.
Fuel is supplied to the engine via fuel injection, that eliminates the risk of carburetor icing or fire. The system is powered by 2 high pressure fuel pumps that work completely independent from each other and each have a build in check valve. So no matter what kind of failure the system has the engine will keep running and the pilot can land the helicopter in safety without any loss of power. Inertia switches have been installed between the pumps and the battery to automatically cut the fuel pumps in case of a hard landing or a rollover, by cutting the fuel pumps fuel is unable to exit the fuel tank and that greatly reduces the risk of a post crash fire
The engine is controlled by 2 FADEC's (Full Authority Digital Engine Control) that monitor all the engine parameters and adjust the fuel injectors and ignition timing accordingly. the 2 fadecs work completely independent and each have their own set of sensors. so in the unlikely event that one fadec would fail (either due to its onw fault or a sensor failure) the second fadec will take over and you can land without any loss of power. The engine has also 2 separate ignition boxes each with their own set of spark plugs.
A Rotorways rotor blades are quite a bit heavier than those a comparable helicopters which results in increased rotor inertia and thus easier autorotations. They are also quite a bit stiffer so they wont deform if you lose rotor rpm.
while other helicopters use ball bearings to make the blades feather Rotorway uses elastomeric bearing which can handle way greater forces this together with a rotor head that has been machined out of a solid block of aluminium make for a realy wide range of rpm that is acceptable (the green range is from 96% to 104%).
The Exec and A600 also have the ability to put the pitch of the rotorblades on 2° negative which allow you to easily regain rpm in a autorotation.
All these facts combined have assured that there have not been a single person who died or was injured in a rotorway in France even though they we have about 40 rotorways flying here and the first one was registered 20 years ago.
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