Forwarded from the bounce bin. Message is from
"Mr. Bryan Wilkinson jr." <aa4bwi@aa4bwi.uklinux.net>
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On Thu, 25 Jan 2001, Grahamclk@aol.com wrote:
> There is another feature of the mono undercarriage which is apparent only
> with the aircraft suspended. The damper block has enormous hysteresis with
> hours of recovery time. Years ago Ron Swinden supplied me with a compression
> curve when I had illusions of using it's Hook's "constant" for auto-loading -
> (you can't, it isn't !)
>
> This means that unless you park your aircraft with the weight off the wheel
> !, the "pre-compression" you put in during construction is just not there and
> the bolts go slack. So there is shock to the system, as about 3/8" slack is
> taken up on first arrival. Another bit of precious prop. to ground spacing
> lost.
>
> Perhaps later blocks are different, but many must be flying like mine.
>
> Graham C G-EMIN
Just wondered if there has been any progress towards a single or
dual coil - spring with a separate hydralic damper ? These are
good enough for F1 and rally use , with due respect to the
original designer. Separation of springing & damping for starters.
This would also give pre - load and compression & rebound
adjustment with the right parts.
Fly good , Bryan
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