Bob,
I am going to the permanently installed refilling bottle. That will be
semiplastic, semitransparent and equipped with an easily openable cap.
The bottle will be aesthetical and the crown of RT`s cockpit, do not
worry. I have also checked it will not prevent the normal use of the
brake lever.
The breathing hole is NOT necessary because because it is not an
ordinary reservoir.
The tube between the bottle and the cylinder will/must have an OFF-ON
valve.
Normally the valve will be always OFF.
I will open it only when the system must be filled or refilled.
That means no changes to the POH.
How to fill (worn pads or very cold):
1) open the cap of the bottle.
2) open the valve.
3) gently make some peaceful strokes by lever
4) close the valve
5) close the cap.
How to refill (when new pads or very hot):
1) as fore
2) as fore
3) gently push some amount the lever and keep it there (there must be
space for extra fluid in the bottle!)
4) as fore
5) as fore
6) relax the lever
All this will be one minute task and no mesh and always ideal brakes.
Changing the whole cylinder is not a realistic option for me!
I definetely do not want to spoil and make a new leather upholstery when
removing an old cylinder an installing new one. If I were still in the
building phase I would absolutely go for it.
I would love to have also a parking pressure valve! Now I have only a
mechanical one (a triangle shape alu sheet with a lanyard connected by a
miniatyre pip-pin) but I am happy with it and it makes passenger(s)
relaxing because it is so...funny.
Raimo OH-XRT
----- Original Message -----
From: "Bob Borger" <rlborger@mac.com>
Sent: Friday, October 16, 2009 2:54 PM
Subject: Re: Europa-List: Monowheel master cylinder?
>
> Raimo,
>
> If the fill opening of the master cylinder is in the pressure side of
the cylinder
> and you connect the reservoir directly to it, then when you apply the
brake the
> pressure will force the fluid in the cylinder back into the reservoir.
Notice that
> the reservoir cap is vented. If the reservoir is full and you apply
the brake the
> fluid will be forced out the vent hole and you will only make a mess
of the
> area around the reservoir.
>
> I guess you could try plugging the vent and filling the reservoir full
in an
> effort to contain the pressure but then you are making the plastic
body a
> pressure vessel. I don't know how long the plastic would accept such
> pressure cycling before it either stripped some set of threads or just
cracked.
> And you have a mess around the reservoir.
>
> There will have to be some means of closing the system between the
> reservoir and master cylinder. It can be a check valve (yes similar
to a
> diode in an electrical sense, something similar to the check valves
used
> in the fuel system to provide bypass of a failed pump) or a manually
> operated valve which would be open to fill the master cylinder and
closed
> for brake operation. This would require a re-write of the aircraft
check list to
> confirm close prior to engine start and open after engine shutdown.
More
> complication to the operation.
>
> Bob
>
> On Friday, October 16, 2009, at 05:14AM, "Raimo Toivio"
<raimo.toivio@rwm.fi> wrote:
<raimo.toivio@rwm.fi>
> >
> >Tim,
> >
> >I think valve is not necessary if you keep the reservoir always
full-filled.
> >And it is easy to keep it so (much easier like cylinder).
> >Adding no-return valve is a 2nd level to enhance brake system.(I
assume no-return-valve is like diode for electricitet).
> >
> >Raimo OH-XRT
> >
> >----- Original Message -----
> >From: "Tim Ward" <ward.t@xtra.co.nz>
> >To: <europa-list@matronics.com>
> >Sent: Thursday, October 15, 2009 11:44 PM
> >Subject: Re: Europa-List: Monowheel master cylinder?
> >
> >
> >>
> >> Don't forget a 'non-return valve' has to be installed as well.
> >> Tim Ward
> >> 12 Waiwetu Street'
> >> Fendalton,
> >> Christchurch.
> >> NEW ZEALAND
> >>
> >> Ph. 64 3 3515166
> >> Mob 021 0640221
> >> Email ward.t@xtra.co.nz
> >> ----- Original Message -----
> >> From: "Flying Farmer" <rpwheelwright@yahoo.co.uk>
> >> To: <europa-list@matronics.com>
> >> Sent: Friday, October 16, 2009 9:27 AM
> >> Subject: Re: Europa-List: Monowheel master cylinder?
> >>
> >>
> >> > <rpwheelwright@yahoo.co.uk>
> >> >
> >> > Please don't throw loose articles at me from around your work
shop's
> >> > But aren't the Mono Brake cylinders ( Trigear Toe Brakes ) A
sealed unit
> >> > and only work when the top filling plug is installed?
> >> > If this is so, simple pluming a reservoir will not work as it
will not
> >> > take the pressure when the lever is pulled.
> >> > A simple short tube screwed into the master cylinder, then the
original
> >> > plug screwed onto the top to seal the unit. This will allow for
extra
> >> > fluid and allow for the wear down of the pads.
> >> >
> >> > I could be wrong!!!
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > Visit - www.EuropaOwners.org
> >> >
> >> >
> >> >
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