ASK-21 Rubber "donuts" shock absorbers

[Bill D]

Has anyone ever replaced these in an old K-21"

[Andreas Maurer]

On Thu, 1 Dec 2011 17:11:58 -0800 (PST), Bill D >
wrote:

>Has anyone ever replaced these in an old K-21"

Sure. How can I help?

Andreas

[Bill D]

On Dec 2, 2:44*pm, Andreas Maurer > wrote:
> On Thu, 1 Dec 2011 17:11:58 -0800 (PST), Bill D >
> wrote:
>
> >Has anyone ever replaced these in an old K-21"
>
> Sure. How can I help?
>
> Andreas

What is the generally accepted service life of the "donuts"?

[Andreas Maurer]

On Fri, 2 Dec 2011 17:24:36 -0800 (PST), Bill D >
wrote:

>What is the generally accepted service life of the "donuts"?

Long.
We changed ours in 2009 when our 21 had about 4.000 hrs and 12.000
flights (it was built in 1986). All landings on a less-than-perfect
grass airfield.
We changed them when the gear started to rattle because the donuts had
become permanently compressed.


Andreas