Message-ID: <3732B8BD.692D@erols.com>
Date: Fri, 07 May 1999 05:56:13 -0400
From: "Jeffrey B. Chipetine" <abcrental@erols.com>
Reply-To: abcrental@erols.com
To: lancair.list@olsusa.com, lancair.list@olsusa.com
Subject: Replacement Gear Shocks
Mime-Version: 1.0

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Lancair Builders/Owners,  

Just thought that those of you considering the investment of gear shocks
with Kini components should be aware that they are highgly regarded in
Motorcycle and Automobile racing and modification circles.  They usually
offer complete rebuild-ability (make sure you know what unit your
Lancair shock is based upon to ensure parts availability from
alternative sources).  Racers typically will remove the stock shocks
from their mounts and throw them away right from the start for the extra
control and consistancy of Konis or other top brand shock. Even though
my racing days are long behind me( in motorcross racing you are washed
up at about 30,  or about 26 in my case),  I still use Koni's on my BMW
R-100 S.   

Some cautions,,, be sure that the builder knows his stuff.  Shock
valving and piston sizing requires knowing the correct amount of preload
value, rate and timing of compression plus desired stroke, return and
resistance values, thrust, twist and off center loading
possibilities/probabilities,  temperature considerations for oil
selection and valve sizing,  initial stiction desireability,  spring
rates,  etc.  

Unlike an automobile/motorcycle,  planes require the shocks to perform
when dead cold(take off/paved,  landing after flight)  as well as when
somewhat warmed (extended taxi over unpaved fields).  Without "bottoming
out".  Bottoming out is bad because now you have a very solid connection
between your expensive airframe and every bump on the field or ramp. 
Many poor quality shocks rely on the resiliance of the tire and tire
casing to make up for inadequately valved or poor quality shocks. 

There is much to know about these little appreciated devices.  I would
suggest that those considering them make themselves familiar with the
modern knowlege (17 years ago,  the other racers were callin me 
"fossil") available.  I would suggest a visit to a good Motorcycle
Modification shop as opposed to the Automotive variety,  as the M/C
people always were more receptive to "Rogue" projects.  Be safe and take
your home field and flying mission into account.  Here "one size" may
not fit all.  Enjoy you building!   

Regards to all.  Jeffrey B. Chipetine

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