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The problem in making modifications to the construction of the aircraft is getting the modifications approved by the various authorities. Even simple modifications can be time consuming and costly to develop. Failure to do so may render airworthiness certificates and insurances invalid. There is a school of thought that says you should try to adapt the pilot to the aircraft not the other way round, as this enables the disabled pilot to fly other aircraft rather that a specially adapted one. I realise that this is not always the case. The pilot here should be encouraged to fly and learn the limits of what he can achieve with one hand until the time comes for the need to use two. Simply gripping the stick with the knees provides a simply way to the free the hand for other short tasks, but may not be very good for tasks such as airbrake and approach control. A useful contact is the British Disabled Flying Club at Website http://fly.to/bdfc At 14:18 28 August 2003, Root wrote: 'E. A. Grens' wrote: Allan - If you own the glider and can make modifications, you could benefit from some modern technology. As you probably know, modern military aircraft use buttons, etc. , on the control stick to perform many functions. A rocker switch on the stick could control your spoilers through a solenoid. Another could control the trim, if necessary. Others could control additional functions (gear?). Since these activities do not occur frequently they will not impose excessive loads on your battery. I would not like to fly a glider where some control depends on the power of a battery to operate. Battery failures are the most common incident in the gliders in my club. Of course early preventive replacement may lower the rate, but in case of a defective new battery with an abnormal short lifetime, you can detect it prior to its failure to keep its charge. If I had to design from scratch some control disposition for people with only one hand, I thing I would like to have the three basic controls (ailerons, rudder, elevator) actuated by the hand, leaving the feet for trim and spoilers. E.g. the hand could actuate the kind of yoke you find on most light power planes, mounted on top of a stick with the 2 usual degrees of freedom. Tilting the yoke left or right would act on the ailerons, moving the stick left or right would act on the rudder, moving the stick back and forward would act on the elevator. Another possible disposition coming in my mind is a rotating handle like those found on motorbikes at the end of a standard stick, but in this case I can't chose which among handle rotation and stick left/right should operate rudder and ailerons. The most natural would be ailerons as usual by stick left/right and rudder by handle rotation, but you would probably not have a sufficient force to operate the rudder by direct mechanical transmission in this way. The tow hook release should also be operated by a button on the yoke or the stick. |
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