On Behalf Of Arnt Karlsen > On Fri, 17 Dec 2004 09:22:17 +0100, Gordan wrote in message > <[EMAIL PROTECTED]>: > > > Hi, > > > > > Pilots are taught to think in terms of pressure on stick not > > > displacement. That is part of the reason that the F-16 is built the > > > way it is. > > ..this used to be the doctrine in at least the 1980'ies in the RNoAF. > > > Thats OK, I agree, with one small change: > > pilots are not *taught* to think in terms in terms of pressure on > > stick. It is the natural way of "sensing the aircraft". > > ..this is the saner approach. ;-)
When it comes down to it, there is only a voltage, or a resistance, in a fly-by-wire system, at least. The FCS computer doesn't really care what it gets. But it has to know the relationship between what the pilot is saying and the voltage it is seeing. In some cases the stick doesn't simply control elevator motion (for example), it commands a pitch rate, or a normal force, or whatever. The one thing the pilot can output to the stick - the single thing - is a force on it. There are standards that state what a pilot can output laterally, on the pedals, and front/back on the stick. I think that's why the control law diagrams I have seen use pilot stick force as the input unit. One hundred percent of the control law diagrams I have seen that include pilot inputs use force. Jon _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
