Today's Message Index:
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1. 01:59 AM - Re: Monowheel Brake Calliper Piston (JohnFrance)
2. 07:32 AM - Re: Monowheel Brake Calliper Piston (tennant)
3. 07:43 AM - Re: Re: Monowheel Brake Calliper Piston (Pete)
4. 01:14 PM - Re: Monowheel Brake Calliper Piston (Franzgo)
5. 01:30 PM - Re: Fuel stabilising (Franzgo)
6. 02:18 PM - Propeller options (skanderup)
7. 09:18 PM - Re: Propeller options (Kevin Challis)
Message 1
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| Subject: | Re: Monowheel Brake Calliper Piston |
Here is some information I pulled from the web Franois
Based on your experience with this system, do you think that the original master
cylinder volume displacement would be enough to be used with the Beringer Caliper
?
Probably but that will depend on the ratio of the surface area between the slave
and master cylinders between the two systems as well a the length of the drake
lever arm. Don't forget to check compatibility of the hydraulic fluid you intend
using with the seal materials.
If so, one could keep the monoW controls as primarily designed in the cockpit and
only replace the wheel and caliper/piping with Beringer parts.
The price would also be "softer"...
Yes, but dont forget to purchase the pressure limiter included in the Beringer
kit.
About the issue of original piston rusting and for rebuilding a new part, what
kind of alloy would you recommend (6061 ? 2024 ?...
According to the documentation in the link below When hard anodising, the best
results are usually found with 6061 and 6082 alloys
The tolerance for the outside diameter of your piston and seal groove should be
clearly annotated as final dimensions, after anodising. A 50 micron layer should
be sufficient. The reason for this is the material swells by about half of
the thickness of the layer so on a piston that will add 2x25 micron to its diameter.
As aluminium is not a strong as the steel piston you are replacing it might be
necessary to increase the skirt thickness of the piston.
https://www.clintonaluminum.com/the-best-aluminum-for-anodizing/
A possible company you could use for anodising is:
https://www.eloxalplus.com/
--------
Europa mono Nr 192
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| Subject: | Re: Monowheel Brake Calliper Piston |
what diameter is the piston?
Perhaps I have a bit of aircraft precipitation hardened stainless steel suitable,
that I could cut off a couple of inches for you.
Barry
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Barry Tennant
D-EHBT
At EDLM - Germany
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| Subject: | Re: Monowheel Brake Calliper Piston |
Both my pistons are aluminum. I don't think they are anything special. Look like
6061 to me.
> On Jan 19, 2020, at 10:39 AM, tennant <barrington.tennant@gmail.com> wrote:
>
>
> what diameter is the piston?
> Perhaps I have a bit of aircraft precipitation hardened stainless steel suitable,
that I could cut off a couple of inches for you.
>
> Barry
>
> --------
> Barry Tennant
> D-EHBT
> At EDLM - Germany
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=494348#494348
>
>
>
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>
>
>
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>
Message 4
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| Subject: | Re: Monowheel Brake Calliper Piston |
Thanks a lot for your acute answers John.
As mechanical solicitations on the piston are mostly in shearing, 6061 may be indeed
a good choice, and it is easier machined than 2017.
If I can't find any "fresh" new piston, then I will make rebuild one this way.
Tenant, the original MonoW Caliper Piston diameter is 1'3/4 (44,5mm), a dimension
quite frequent in the Europa (External diameter of the torque tube, and of
the pitch longitudinal tube in particular...)
And yes, all pistons I had in hands were in aluminium alloys
--------
Franzgo
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| Subject: | Re: Fuel stabilising |
Hello Steven,
I think that stabilization may be necessary only for mogas containing substantial
levels of ethanol (5% or more).
Here in France the use of 98 Mogas is a good guarantee to avoid any water absorption
within the fuel. I remember had tested 98 unleaded fuel and found absolutely
no water inside.
Moreover, the inner position of fuel tank inside the Europa fuselage lessens the
risk of internal condensations mainly due to quick temps variations.
Beside those remarks, I would not be confident to add any chemical in my tank,
without considering its compliance with the whole fuel line, including pumps,
pressure regulator & carbs...
To check the level of water in your fuel, you can use a cheap "fuel checking" tube
easily find at Spruce aircraft.
Franois
--------
Franzgo
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| Subject: | Propeller options |
Hi,
I have experienced some corrosion on my warp drive propeller blades after a road
trip in winter conditions. I have decided to condemn them and order a new propeller.
I would like to hear recommendations from the forum regarding alternative ground
adjustable pitch propellers with 62 inch diameter.
I would prefer equal or better performance in the air and noise. In addition I
would prefer to have them coated to better resist corrosion.
I am not considering to change to variable pitch/constant speed on my Rotax 912ULS.
Any recommendations are welcome.
Regards,
Allan Skanderup Nielsen
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Message 7
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| Subject: | Re: Propeller options |
Variable pitch. I know you said you dont want one but it really is worth it.
Kevin Challis
G ODJG tri gear 912ULS
> On 19 Jan 2020, at 22:21, skanderup <allan_skanderup@hotmail.com> wrote:
>
>
> Hi,
> I have experienced some corrosion on my warp drive propeller blades after a road
trip in winter conditions. I have decided to condemn them and order a new
propeller.
>
> I would like to hear recommendations from the forum regarding alternative ground
adjustable pitch propellers with 62 inch diameter.
>
> I would prefer equal or better performance in the air and noise. In addition
I would prefer to have them coated to better resist corrosion.
>
> I am not considering to change to variable pitch/constant speed on my Rotax 912ULS.
>
> Any recommendations are welcome.
>
> Regards,
> Allan Skanderup Nielsen
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=494358#494358
>
>
>
>
>
>
>
>
>
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