[simpits-tech] May the Force Feedback be with you...

[Matt Bailey]

Great idea........when can we expect a prototype? :)

	-Matt Bailey

On Monday 10 February 2003 05:20, you wrote:
>              IF YOU REALLY WANT TO DO IT RIGT---
>
> Build a full size aircraft with all the control surfaces and put a giant
> speed controlled fan in front of it.  ;-)
>
> On 2/10/03 12:08 AM, "Matt Bailey" <mattb@rtccom.net> wrote:
> > Why bother with the extra trim cylinder? Just use one assembly, for
> > force, and move it with, say, a rack and pinion. A reeaally neat way to
> > do this would be to link a trim wheel to the rack and pinion, and connect
> > a two-way motor/servo to the wheel........with the forward/off/aft switch
> > mounted on the control stick/yoke. Then you have mechanical and electric
> > trim available, bypassing software completely. Sweeet. :)
> >
> > -Matt Bailey
> >
> > On Sunday 09 February 2003 23:44, you wrote:
> >> ive added labels to my drawing for bigger clarity..
> >>
> >> the problem of using one cylinder to handle both trim (center offset)
> >> and stick pressure is much the same as with a spring...
> >>
> >> say total is 20 units (that could be liters, PSI, bar pressure - what
> >> ever, it doesn't matter in this discustion..
> >> center is then C1A=10 and C1B=10
> >>
> >> if you are out of balance (wrong trim) and C1A=15 and C1B=5 it would be
> >> much easier to move the pistone 1inch and compress C1A than to compress
> >> C1B... but if you use Cylinder1 (=3 in my drawing, a little typo) to
> >> only control the pressure needed to move the stick things will get a lot
> >> simpler - more pressure in both C1A and C1B the harder it will be to
> >> move the stick.
> >>
> >> the reason for using to valves (V1 and V2) and not just putting C1A and
> >> C1B on the same hose is; the stick will just move air from one chamber
> >> to the other.
> >>
> >>
> >>
> >> with cylinder 2 you can control the center of the stick - hence the trim
> >> possition. if you put more pressure into C2A the stick will go backward,
> >> in effect you can contol where the netural stick possition is.....
> >>
> >>
> >> with regard to pressure needed to control the stick...
> >>
> >> you could probaly get a sping loaded system to work, but as Craig
> >> mentioned, there are afew conditions where it will get into trouble...
> >> namely :
> >>
> >> 1) no movement (here you could with my schematics just open V1 and V2
> >> and you would have no resistance what so ever)
> >>
> >> 2) high G turn where the force required to pull stick either backwards
> >> is greater then moving the stick forward (with my schematics this can be
> >> done by applying more pressure to C1B (and C2A to keep the netual
> >> possition)
> >>
> >> 3) very low G turn - the oposit of 2