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Re: Europa-List: Monowheel master cylinder?

Subject: Re: Europa-List: Monowheel master cylinder?
From: Raimo Toivio <raimo.toivio@rwm.fi>
Date: Fri, 30 Oct 2009 16:28:15

Dear Kingsley,

As I wrote that position is "absolutely erconomical " and gives a good 
possibility
to Hands On Throttle And Stick.

My point was only technical not physisical as follows: I see always extremely 
potential
and sometimes even invisible risks when modifying or installing something
to the moving parts especially to the plane`s steering components. Good and
welknown example: autopilots servo could kill many ways like jamming the 
controls
if installed with wrong geometry. 

I only tried to say: please be very careful when installing something extra (not
---From Manual) to the moving parts!
Could you please accept that point Kingsley?

Of course that (doing mods) is not a problem to pros and other experienced and
talented builders.

Anyway Europas are marketing also for the first time builders and other 
non-technical
human educated people like librarians or even to me! Kingsley - can you
believe - all of us are not Honeywell or RAF engineers or NASA pilots!

I give you one real example of the lurking devil which was just behind MY stick
- please be patient:

During my building phase I installed a fighter style (because I am too so 
childish)
stick grip. I said myself it is necessary because those buttons and switches
add safety (by HOTAS!). That was a mod - it was not in my Europa bibble.

I had to run the connection cable (thick, about 20 wires) from the stick (which
is moving!) to the seat bottom locker (which is not moving!). I made a little
hole in the seat bottom fore glass surface and run the cable through it. After
that I tested very carefully all the stick movements. Full fore, aft and 
sideways.
Again and again and again. I did understand there could be something wrong
but I did not realize it until...

...suddenly when full fore the stick jammed totally! I could not level the plane
anymore in my workshop! In a real life and airborne there were only seconds
and the plane would have gone to the bad side of the VNE towards mother ground.

Why: when the stick goes fore, the bottom of it goes aft. So went my stick grip
cable also, through the little hole to the seat bottom locker. When I this time
tried to pull the stick back, the cable has badly jammed to the sides of the
hole. Yes - it was rubber insulated.

Correction: I fixed the cable permanently to the lead-through hole. And hope it
will be fixed for ever.

Doing mods - even little ones - it is fascinating, but could be also dangerous.

The brake lever on the stick in itself  is an ideal place for it. That is clear!

Wishes from Finland, 
Raimo OH-XRT


----- Original Message ----- 
From: "Kingsley Hurst" <hurstkr@redzone.com.au>
Sent: Friday, October 30, 2009 1:09 PM
Subject: Re: Europa-List: Monowheel master cylinder?


> 
> > Installing on the stick? That would be absolutely erconomical (HOTAS 
> > braking) but could there be some risks lurking??? I know there are some 
> > ultras or so with brake lever on the stick.
> 
> Hello Raimo
> 
> There is no need to worry about lurking risks with a hand brake on the 
> stick.  I have considerable experience using them in gliders and I can 
> assure you that with mono wheel aircraft, it is an ideal solution for the 
> braking problem.
> 
> I cannot even begin to imagine how someone would land with their fist 
> clasped around the brake handle on landing because it is such an unnatural 
> way to hold the stick but I guess anything is possible.  One thing I have 
> noticed however, is the number of power pilots flying with differential foot

> braking that land with their feet high on the pedals with resultant partial 
> braking. . . . especially in Cessnas.  This is a terrible habit but it is 
> surprising how many do it.
> 
> Also, consider the number of push bikes and motor bikes in the world with 
> hand operated braking.  If there were any risks lurking, I'm sure the method

> would have been changed by now.
> 
> Best regards
> Kingsley 
> 
> 
> 
> 
> 
> 



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