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Europa-List: New Tailwheel Ply inserts

Subject: Europa-List: New Tailwheel Ply inserts
From: Graham Singleton <graham@gflight.f9.co.uk>
Date: Thu, 24 Jul 2003 23:38:09

> >> | gidday,
> >> | Some time ago I recall advice regarding the replacement, or substitution
> >> of the ply
> >> | inserts in the tailwheel setup due to compression forces squashing the
> >> ply. Is this
> >> | true of the new tailwheel setup, and if so, any advice as to what is a
> >> better
> >> | medium to use? No doubt a metal replacement would be possible, at the
> >> expense

There is another variable in this scenario that affects the tension of the 
spring retaining bolt. That is the stiffness of the short length of (4130 I 
trust?) steel with a relatively large 5/16" hole reducing its width and 
stiffness. I have seen one or two of these bent by the bolt load at the 
center. I would prefer to use a larger piece of steel with a small flange 
on the forward end to increase bending stiffness. Then teh bolt tension is 
spread over the whole of the area of the plywood inserts.

In the event of a large side load, such as the bump during a ground loop, 
the bolt will bend and absorb a lot of the energy. (seen that, too) I don't 
think there is much problem with the sternpost. I've never seen any damage 
in that area. Don't forget though, I haven't seen as many Europas as the 
factory have, so a second opinion from Andy and Neville would be most welcome.

Graham 


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