In a message dated 13/11/97 19:31:22, Graham S. wrote:
<< It (the aft offset f the tailwheel arm) is there to give more leverage on
the active cable at the limit of the steering range. >>
A system in which the same input gives more output as it moves is only
conditionally stable. (Imagine a small arm far to the rear). Conditions
here such as loading due to tyre scubbing will stablise it, and it will
return to stablity anyway beyond 25 deg. output with this amount of offset.
But I would have thought that straight ahead was the place to have maximum
control. This offset also produces cable slackening the other side which is
greater than the springs can absorb. So PIO would seem to be a distinct
possibility. Perhaps that's why you didn't like the original ? Incidentally
I presume your quadrant is not offset, for obvious reasons.
<<It also gives me the full 120 deg deflection. >>
You can get 120 deg. deflection if the offset of the rear arm is removed
using a dirve arm of 148mm. There is no cable slackening either, its simpler
to make and lighter.
<<With everything inside except the two cables running alongside the new
spring arm to the quadrant it looks neat.>>
Yes, inside is very neat, but I wonder about the friction and wear due to the
deflection of the cables through the rear closeout tubes (pulleys maybe ?,
as elsewhere in the Europa system )
G-EMIN
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