DE683177C - Steep helicopter height control - Google Patents

Description

F84153 Xljosb

The height control of gyroscopes is so far either by a tail unit just like with hang gliders or through the surrounding structure itself it by tilting the whole rotor, be it by changing the angle of the blades, causes.

In the case of helicopters, a tail unit is ineffective when stationary in the air, therefore in Usually only structural control is possible. Even with gyroplanes, the achievement Ever lower minimum speeds, a tailplane height increase always less useful and must then also be replaced by structural control, whereby the fixed horizontal stabilizer is usually retained.

Now, at high speeds, the gyroplane control shows only dangerous disadvantages in that the longitudinal stability is not in the usual sense, but in relation to the assignment of a specific control position to a specific one Speed is lost so that the guide feels rudderless. It has therefore already been proposed to control the structure by inclination to be connected to the tail control.

Since the helicopter also use the gyroplane mode in the event of an emergency must and especially in an emergency bad flight characteristics particularly inappropriate the elimination of the mentioned error is important for all steep screwdrivers.

The arrangements proposed so far

but cannot completely solve the problem

, to solve. Rather, two shortcomings remain:

i. If an elevator is easy to change in the same sense, sometimes with a- ^ ₀

the translation between the two controls, moved so that once set Translation on each part of the control path, proportional paths of the two controls are covered, so is "at high speeds, so at strong Pressing that still supports the structural control effect, which then becomes dangerously high.

2. As long as the structural control on the steep screwdriver is used alone, you only need a fixed fin as a horizontal stabilizer, which are used for longitudinal trimming in the manner known from hang gliders can be. This possibility no longer exists without further ado if the fin than Elevator is used and moved by the elevator controls. So the sense is one Fin adjustment, namely to allow the driver a comfortable longitudinal trim, destroyed. It has been suggested to add other tail parts that are also attached, To adjust flaps or the like for trimming, but this results in new weight and resistance expenditure conditional.

The invention overcomes both disadvantages; mainly because the movement the rudder or fin height control on a certain part of the control path, So here when pressing, the structure is lowered or turned off or even up to is directed in the opposite direction to a slight degree, and in a further embodiment in that in the height control actuating linkage to the horizontal stabilizer an adjustment device is installed in the manner of the known fin adjustments. Through this it is achieved that the horizontal stabilizer will take part in the steering movements, but you will do one different basic settings and so the ability to trim without significant new ones Weight expenditure and is restored without any new resistance.

In Fig. Ι an embodiment of the invention is shown. By means of the joystick α , the rotor head c is inclined in a known manner via the linkage b , or the setting angle of all blades is periodically adjusted. But also is simultaneously moved by the linkage .the d e fin, which supports the control of the structure by obtaining a greater setting angle as the screw plane is the front lowered.

The "connection to the fin is connected to a lever f on the stick which, when pressed hard, reaches a position (shown in dashed lines) in which there is no further movement of the fin. If the stick is moved further forward, the now backward, That is, movement of the fin directed towards pulling, even in a desired manner, weakly counteracts the pressing of the rotor head.Depending on the size of the stick deflection and the dimensions of the levers and rods, the fin movement can be reduced, eliminated or even counteracted during the pressure travel of the height control.

In. Fig. 2 shows an embodiment in which the height control movement is also superimposed on an additional fin adjustment known per se for the purpose of trimming. In the linkage d of the fin, the usual fin adjustment by means of a chain wheel and screw spindle i is switched on, which can be adjusted by the handwheel g on the driver's seat. In spite of this, the height control maintains the co-movement with this arrangement, only it takes place around a changed central position of the fin. Instead of the fin, a rudder on a fixed fin can of course also be used.

Claims (2)

Patent claims: i. S partial screwdriver height control by means of adjustable setting of the screw level or the blades and associated, equivalent change of the elevator or fin position, characterized by the activation of a Levering in the tail boom of such a kind that one of the stick movement is essentially proportionate Screw setting change one with increasing pressure deflection of the stick decreasing, in the further course becoming zero and finally opposite directional change in the rudder or fin setting. 2. steep screw height control according to Atis claim i, characterized in that in the linkage leading to the tail unit is a known Flossenverstelivorrichtung is switched on. : 1 sheet of drawings