Today's Message Index:
----------------------
1. 02:41 AM - Re: Fuel Pump Vent/Drain Line Routing (Paul M 383)
2. 03:20 AM - Re: Re: Fuel Pump Vent/Drain Line Routing (Peter Zutrauen)
3. 09:16 AM - Rotax 914, how hard does it suck? (rparigoris)
4. 09:20 AM - Rotax 914 UMA Differential Pressure Transducer Failure? (rparigoris)
5. 10:37 AM - Re: Monowheel Brake Calliper Piston (Franzgo)
6. 12:49 PM - Re: Re: Monowheel Brake Calliper Piston (Pete)
7. 03:11 PM - Re: Re: Monowheel Brake Calliper Piston (davidjoyce@doctors.org.uk)
8. 04:29 PM - Re: Re: Monowheel Brake Calliper Piston (Fred Klein)
9. 04:38 PM - Re: Monowheel Brake Calliper Piston (Franzgo)
Message 1
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| Subject: | Re: Fuel Pump Vent/Drain Line Routing |
Thanks Pete and Alan,
I was hoping to avoid using solid pipes by finding a cool (!) route, but if I have
to...
Pete, watch out for any negative (or positive) pressure at your exit hole - the
Rotax Owner video cautions against this very thing:
https://youtu.be/0QYJ3mxziT4?t=859 or
https://www.rotax-owner.com/en/videos-topmenu/free-videos/424-fuelpump
"We do not want to run this line overboard into the slipstream, or into a positive
or negative pressure area..."
Best,
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=494316#494316
Message 2
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| Subject: | Re: Fuel Pump Vent/Drain Line Routing |
Thx Paul for the caution. So far I have not seen any impact to fuel
pressure. I may install a small shield to reduce the pitot pressure. I
fail to see though how pitot pressure could over-ride the fuel pump return
spring... just seems to be a bit overblown? If I do see negative impacts,
I will glass in a small tube along the inside of the cowl well away from
the exhaust.
On Fri, Jan 17, 2020 at 5:48 AM Paul M 383 <europaul383@hotmail.com> wrote:
>
> Thanks Pete and Alan,
>
> I was hoping to avoid using solid pipes by finding a cool (!) route, but
> if I have to...
>
> Pete, watch out for any negative (or positive) pressure at your exit hole
> - the Rotax Owner video cautions against this very thing:
>
> https://youtu.be/0QYJ3mxziT4?t=859 or
> https://www.rotax-owner.com/en/videos-topmenu/free-videos/424-fuelpump
>
> "We do not want to run this line overboard into the slipstream, or into a
> positive or negative pressure area..."
>
> Best,
>
> Paul
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=494316#494316
>
>
Message 3
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| Subject: | Rotax 914, how hard does it suck? |
Hi Group
Curious, has anyone performed a full power run-up checking the oil pump intake
vacuum? What were your results? What diameter oil line did you use? Did you have
a Oil Thermostat?
Thx.
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=494323#494323
Message 4
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| Subject: | Rotax 914 UMA Differential Pressure Transducer Failure? |
Hi Group
Curious, has anyone had a 914 UMA Differential Pressure Transducer Failure?
If so at how many hours? Did you have Transducer exposed to internal cowl temperatures
or have it situated in a container under cowl with ambient airflow or
perhaps located aft of Firewall?
How was failure noticed?
Thx.
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=494324#494324
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| Subject: | Re: Monowheel Brake Calliper Piston |
Well, maybe I was not clear, Europa no longer provides any of the old braking system
and original wheel/disk for the monowheel, as they chose to replace it with
the Beringer system which includes a new rim beside a completely reformed
brake.
Patrick, I am a bit reluctant to the Beringer system becauses the main tyre no
longer uses airtube and, in consequence requires a far higher pressure (around
2 bar) than the previous recommended pressure (1,3 bar). For grass strips, a
higher pressure is not really an issue, but for hard landing surfaces with the
monowheel I really fear that it is not adapted (Bouncing and bouncing again...)
For the moment I have chosen to keep the old system with an intermediate tyre pressure
(1.5 bar) which seeems to be a good compromise.
Peter, yes the piston may be machined quite easely as far as you have one in hand.
And maybe it would be profitable to use 2017 alloy with anodization finish
to keep it away from rust. On my aircraft I have found interesting to use Silicon
Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to chase
moisture from the brake pipe and also to protect all gaskets from wearing
to fast. For one year now I find that the caliper has less tendancy to grip
than with the old sticky (and hygroscopic) brake liquid...
--------
Franzgo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=494326#494326
Message 6
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| Subject: | Re: Monowheel Brake Calliper Piston |
Thx Franzgo,
The anodizing is a good idea.
I am currently using Dot5 as well in my classic mono. Expensive, but i like it
as it is so benign. I wonder if beringer can use it (they spec dot4).
I talked with beringer at osh, as well as emailing them, and in those interactions
they claimed 18-20psi is fine. Did you find a the minimum pressure documented
somewhere?
Thx,
Pete
> On Jan 17, 2020, at 1:36 PM, Franzgo <fg-europa@orange.fr> wrote:
>
>
> Well, maybe I was not clear, Europa no longer provides any of the old braking
system and original wheel/disk for the monowheel, as they chose to replace it
with the Beringer system which includes a new rim beside a completely reformed
brake.
>
> Patrick, I am a bit reluctant to the Beringer system becauses the main tyre no
longer uses airtube and, in consequence requires a far higher pressure (around
2 bar) than the previous recommended pressure (1,3 bar). For grass strips,
a higher pressure is not really an issue, but for hard landing surfaces with the
monowheel I really fear that it is not adapted (Bouncing and bouncing again...)
>
> For the moment I have chosen to keep the old system with an intermediate tyre
pressure (1.5 bar) which seeems to be a good compromise.
>
> Peter, yes the piston may be machined quite easely as far as you have one in
hand. And maybe it would be profitable to use 2017 alloy with anodization finish
to keep it away from rust. On my aircraft I have found interesting to use Silicon
Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to
chase moisture from the brake pipe and also to protect all gaskets from wearing
to fast. For one year now I find that the caliper has less tendancy to grip
than with the old sticky (and hygroscopic) brake liquid...
>
> --------
> Franzgo
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=494326#494326
>
>
>
>
>
>
>
>
>
Message 7
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| Subject: | Re: Monowheel Brake Calliper Piston |
Franzgo, I chose to change my original mono wheel and brake system to a
Beringer one, largely to save some weight. I use the same pressure as in
the original and have had no problems with it. The braking is superior..
There are of course quite a few mono wheels lying around from folk who
have changed to trigear formation and you may well be able to locate one
if you really want to stick with the original. Regards, David Joyce,
GXSDJ
On 2020-01-17 18:36, Franzgo wrote:
>
> Well, maybe I was not clear, Europa no longer provides any of the old braking
system and original wheel/disk for the monowheel, as they chose to replace it
with the Beringer system which includes a new rim beside a completely reformed
brake.
>
> Patrick, I am a bit reluctant to the Beringer system becauses the main tyre no
longer uses airtube and, in consequence requires a far higher pressure (around
2 bar) than the previous recommended pressure (1,3 bar). For grass strips,
a higher pressure is not really an issue, but for hard landing surfaces with the
monowheel I really fear that it is not adapted (Bouncing and bouncing again...)
>
> For the moment I have chosen to keep the old system with an intermediate tyre
pressure (1.5 bar) which seeems to be a good compromise.
>
> Peter, yes the piston may be machined quite easely as far as you have one in
hand. And maybe it would be profitable to use 2017 alloy with anodization finish
to keep it away from rust. On my aircraft I have found interesting to use Silicon
Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to
chase moisture from the brake pipe and also to protect all gaskets from wearing
to fast. For one year now I find that the caliper has less tendancy to grip
than with the old sticky (and hygroscopic) brake liquid...
>
> --------
> Franzgo
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=494326#494326 [1]
>
Links:
------
[1] http://forums.matronics.com/viewtopic.php?p=494326#494326
[2] http://www.matronics.com/contribution
[3] http://www.matronics.com/Navigator?Europa-List
[4] http://forums.matronics.com
[5] http://wiki.matronics.com
Message 8
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| Subject: | Re: Monowheel Brake Calliper Piston |
With my Beringer I particularly like having mounted it low on the pilot
=99s control column which allows left hand breaking with right hand on throt
tle
Sent from my iPhone
> On Jan 17, 2020, at 3:13 PM, davidjoyce@doctors.org.uk wrote:
>
> =EF=BB
> Franzgo, I chose to change my original mono wheel and brake system to a Be
ringer one, largely to save some weight. I use the same pressure as in the o
riginal and have had no problems with it. The braking is superior..
>
> There are of course quite a few mono wheels lying around from folk who hav
e changed to trigear formation and you may well be able to locate one if you
really want to stick with the original. Regards, David Joyce, GXSDJ
>
>
>
>
>> On 2020-01-17 18:36, Franzgo wrote:
>>
>>
>> Well, maybe I was not clear, Europa no longer provides any of the old bra
king system and original wheel/disk for the monowheel, as they chose to repl
ace it with the Beringer system which includes a new rim beside a completel
y reformed brake.
>>
>> Patrick, I am a bit reluctant to the Beringer system becauses the main ty
re no longer uses airtube and, in consequence requires a far higher pressure
(around 2 bar) than the previous recommended pressure (1,3 bar). For grass s
trips, a higher pressure is not really an issue, but for hard landing surfac
es with the monowheel I really fear that it is not adapted (Bouncing and bou
ncing again...)
>>
>> For the moment I have chosen to keep the old system with an intermediate t
yre pressure (1.5 bar) which seeems to be a good compromise.
>>
>> Peter, yes the piston may be machined quite easely as far as you have one
in hand. And maybe it would be profitable to use 2017 alloy with anodizatio
n finish to keep it away from rust. On my aircraft I have found interesting t
o use Silicon Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in
order to chase moisture from the brake pipe and also to protect all gaskets
from wearing to fast. For one year now I find that the caliper has less te
ndancy to grip than with the old sticky (and hygroscopic) brake liquid...
>>
>> --------
>> Franzgo
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=494326#494326
>>
>>
>>
>>
>>
>>
>> .matronics.com/contribution
>> ttp://www.matronics.com/Navigator?Europa-List
>> ics.com
>> .com
>> .matronics.com/contribution
>>
>>
>>
Message 9
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| Subject: | Re: Monowheel Brake Calliper Piston |
Hi All,
When visiting the Beringer facility in 2018 I was told that a higher pressure was
necessary with the tubeless system in order to keep the tyre firmly inserted
in the rim. That's why I was not confident with this new wheel. And another
problem is the deflation quite accelerated (vs tube-type tyre), in case of perforation,
no ?
Last question, maybe someone has kept the original master cylinder hand-controled
with the Beringer wheel ?
I would prefer to keep it, personnaly I don't really like the brake command on
the control stiick.
On the other hand, the Beringer system is truly quite lighter, yes, but yet VERY
EXPENSIVE (More than 1200 euros) I think.
To finish about Silicon Oil (5.0, as 5.1 is not silicon), it is certain that it
can be used with the Beringer system, because it complies with ANY GASKETS, is
not flammabe, non toxic, non hygroscopic and whatsoever...
Moreover, no more fastidious purges, this oil is a lifetime product !
Franois
MonoW 914 Classic S/N 36
Vienne, France
--------
Franzgo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=494330#494330
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