RE: Europa-List: Mod 70

[Karl Heindl <kheindl@msn.com>]

Tim and Nigel=2C


Thanks for putting me straight. I just assumed that the mono bungee had the
 same function.


On the trigear question I don't see how the bungee or springs only come int
o play on a hard landing. I think it is exactly the other way round. The bu
ngee is constantly stretching and contracting on every little bump. I can a
ctually observe that through my bulkhead window. Only when the bungee/sprin
g have reached their maximum stretch does the leg take over. 

Tim mentions shock absorbers. Now that would have been ideal also for the t
rigear=2C especially to lessen the slingshot effect of the springs.


Karl


> Date: Wed=2C 15 Apr 2009 10:39:38 +0100
> From: houlihan@blueyonder.co.uk
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Mod 70
> 
k>
> 
> Karl.
> I may be wrong on this as I am working from my memory which can be very 
> suspect.
> My understanding of the Mono undercarriage is that the rubber bungee's 
> are there to assist with lifting the wheel assembly to the retracted 
> position. The suspension is managed by the "rubber" block between the 
> reaction plates. any damping is due to the "thwack" effect mentioned by 
> Graham=2C or by the optional =2C at least it was optional on the Classic
=2C 
> twin shock absorbers fitted through the middle of the elastomer block.
> 
> Tim
> 
> 
> Karl Heindl wrote:
> > 
> >
> > My own experience confirms this. A spring suspension on the mono would

> > cause some very interesting landings. It's bad enough on a trike. Very

> > similar to : removing the shock absorbers from the front suspension of

> > your car=2C and driving it at 80 90 km/h along a bumpy grass field.
> > 
> > Karl
> >
> > >
> > <grahamsingleton@btinternet.com>
> > >
> > > Robert Borger wrote:
> > > > Raimo=2C
> > > >
> > > > My understanding from discussions with Nev is that the spring 
> > reaction
> > > > of a metal spring is incorrect for this application.
> > > >
> > > > Bob B
> > > The important point is that rubber has a damping effect but steel doe
s
> > > not. This is why rubber=2C (elastic) is better than steel (springs) f
or
> > > undercarriages.
> > > Think about it=2C a spring goes "boingyoingoing" but a rubber band go
es
> > > "thwack"
> > > Graham
> > &g===========
> > >
> > >
> > >
> > *
> >
> >
> > *
> > -----------------------------------------------------------------------
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> >
> >
> > Checked by AVG - www.avg.com 
> >
> > 
> 
> 
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