Raimo,
That's exactly the scenario I was investigating. I even have the little
transparent
reservoir and was ready to plumb it into the cylinder with some sort of
valve. It should work well enough.
Please post pics of your system once you have it working. I'm sure there are
others
out there who would like to implement some similar solution to the lack
of master cylinder reservoir.
I'm still awaiting the new master cylinder to be shipped from France. My plan
is to install the new master cylinder on the pilot stick. Perhaps install
another
on the co-pilot side at some point in the future if I see a need (allowing
my buddy Gary to check others out on the monowheel prior to flying their own?).
Once the new master cylinder is installed and all works well, I will make
a new aluminum cover plate to replace the cover with the brake slot. It will
also be slightly larger to extend back and cover the fill hole for the old brake
master cylinder. That will allow a neat solution to the holes in the leather
without having to replace the leather cover.
Check six,
Bob Borger
On Thursday, October 29, 2009, at 08:21AM, "Raimo Toivio" <raimo.toivio@rwm.fi>
wrote:
>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>
>To: <europa-list@matronics.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:
>> >
>> >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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>> > > > >
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