Today's Message Index:
----------------------
1. 02:39 AM - Cambridge DOTH Cancelled (Paddy Clarke)
2. 03:32 AM - Europa Classic cooling hoses (UVTReith)
3. 05:42 AM - Re: Europa Classic cooling hoses (Frans Veldman)
4. 05:54 AM - Re: Purging a Rotax with an oil thermostat. (Frans Veldman)
5. 06:03 AM - Re: FW: Will Daniell's wing - not as bad as I first though (Frans Veldman)
6. 06:16 AM - Re: Purging a Rotax with an oil thermostat. (William Daniell)
7. 06:42 AM - Re: FW: Will Daniell's wing - not as bad as I first though (William Daniell)
8. 07:13 AM - Re: Purging a Rotax with an oil thermostat. (Frans Veldman)
9. 07:36 AM - Re: Purging a Rotax with an oil thermostat. (William Daniell)
10. 01:39 PM - Re: Cambridge DOTH Cancelled (John Wighton)
Message 1
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| Subject: | Cambridge DOTH Cancelled |
Hi Folks,
It looks like it will clear today, but probably not in time for our DOTH. I may
try to get airborne this afternoon for a short hop to Old Sarum.
My apologies - I'll try again next week.
All the Best, Paddy
Paddy Clarke
Europa G-KIMM
Message 2
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| Subject: | Europa Classic cooling hoses |
Dear Europa family,
Walter Swoboda needs for his Classic Monowheel with Rotax 912 new
cooling
hoses, especially the 180=B0 bended outlet hose. But better would be to
replace the inlet hose too.
EA/UK do not have them. Some weeks ago there was a discussion and a
result,
where you can get these hoses ' when I remember right.
Please help out.
Best Regards,
Bruno Reith / Europa Aircraft Germany
Message 3
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| Subject: | Re: Europa Classic cooling hoses |
On 03/17/2011 11:27 AM, UVTReith wrote:
> Walter Swoboda needs for his Classic Monowheel with Rotax 912 new
> cooling hoses, especially the 180 bended outlet hose. But better would
> be to replace the inlet hose too.
Stefan Ingemarsson, also a member of the Europa community, sells
silicone hoses for both the XS and the classic Europa.
His email is ingemarsson.s at telia.com
I just received a set of silicone hoses for my XS from him. I'm not an
expert on hoses but these hoses look ok to me. I hope they don't age as
much as rubber hoses, and they are more heat resistant. And some people
like the blue color (although I usually fly with the cowling securely
closed). If I'm correctly informed, these hoses don't need to be
replaced every five years.
Frans
Message 4
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| Subject: | Re: Purging a Rotax with an oil thermostat. |
On 03/16/2011 05:18 AM, rparigoris wrote:
> I have a 914 and will be installing a Mocal oil thermostat.
Have you thought about installing a mocal oil to water heat exchanger?
The Finnish guys are flying with these and use them for heating up the
oil as well as for cooling. (also when they make trips to warm south
European fields during summer, and they seem to experience less cooling
problems than other folks). They use it instead of an air cooled oil
radiator. So it actually saves weight, and with the traditional oil
cooler removed from the duct, you will find that the water cooling
capacity increases tremendously, more than enough to carry the
additional heat from the heat exchanger.
I will be using a somewhat modified scheme: I use a radiator and a heat
exchanger in series. The radiator is 50% smaller and is used to pre-cool
the oil. Then the oil goes through the heat exchanger. In winter this
warms up the oil, and in summer it provides additional cooling. During
winter flying and summer cruising I anticipate that the oil radiator is
not necessary so I will close it with a flap to minimize drag.
Some other Europa flyers are in the process of converting to a more
efficient cooling scheme with a heat exchanger as well, but I will let
them speak for themselves if they want to. Most of them intent to fly on
the heat exchanger exclusively and leave the radiator completely out.
Compared to an oil thermostat I feel that the failure potential is less,
and it also offers more potential to minimize drag. After all it is
somewhat ineffcient to drag air through a radiator while you don't want
to cool the oil at all and have the thermostat closed at the same time!
And I can already tell you from experience that removing the oil
radiator from the cooling duct does wonders to the cooling capacity of
the water radiator, and solves all cooling problems instantly.
Frans
Message 5
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| Subject: | Re: FW: Will Daniell's wing - not as bad as I first though |
On 03/16/2011 06:16 PM, William Daniell wrote:
> Phew things are never as good or as bad as they seem at first sight -
> it wasnt as bad as I thought it might bewell not bad at all really.
Just remember that the strength comes from the glass, not the wood. The
wood is there just to keep the glass layers on the bottom and top of the
spar separated, so that all spar bending forces are converted into
compression and tension forces acting on these glass layers.
Apart from the Redux I think in this case I would reinforce the affected
area with two or three layers of uni tapered down over the surface just
to restore the original tension strength. Redux is a nice filler but I
think the tension strength might leave something to be desired.
Frans
Message 6
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| Subject: | Purging a Rotax with an oil thermostat. |
Frans
Can you explain a little more about how the mocal installation works please?
I am assuming that the heat exchanger goes in downstream of the radiator so
that the oil is cooled at the coolest point of the system.
And also what are the specs of the heat exchanger.
Thanks
Will
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Frans Veldman
Sent: 17 March, 2011 07:52
Subject: Re: Europa-List: Purging a Rotax with an oil thermostat.
On 03/16/2011 05:18 AM, rparigoris wrote:
> I have a 914 and will be installing a Mocal oil thermostat.
Have you thought about installing a mocal oil to water heat exchanger?
The Finnish guys are flying with these and use them for heating up the
oil as well as for cooling. (also when they make trips to warm south
European fields during summer, and they seem to experience less cooling
problems than other folks). They use it instead of an air cooled oil
radiator. So it actually saves weight, and with the traditional oil
cooler removed from the duct, you will find that the water cooling
capacity increases tremendously, more than enough to carry the
additional heat from the heat exchanger.
I will be using a somewhat modified scheme: I use a radiator and a heat
exchanger in series. The radiator is 50% smaller and is used to pre-cool
the oil. Then the oil goes through the heat exchanger. In winter this
warms up the oil, and in summer it provides additional cooling. During
winter flying and summer cruising I anticipate that the oil radiator is
not necessary so I will close it with a flap to minimize drag.
Some other Europa flyers are in the process of converting to a more
efficient cooling scheme with a heat exchanger as well, but I will let
them speak for themselves if they want to. Most of them intent to fly on
the heat exchanger exclusively and leave the radiator completely out.
Compared to an oil thermostat I feel that the failure potential is less,
and it also offers more potential to minimize drag. After all it is
somewhat ineffcient to drag air through a radiator while you don't want
to cool the oil at all and have the thermostat closed at the same time!
And I can already tell you from experience that removing the oil
radiator from the cooling duct does wonders to the cooling capacity of
the water radiator, and solves all cooling problems instantly.
Frans
Message 7
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| Subject: | FW: Will Daniell's wing - not as bad as I first though |
Frans
Yes I shared your concern. My heart-failure wasn't over the wood. It was
over the bite that I took out of the upper spar cap. I think that I
remember someone telling me that something like 90% of the load is carried
in the top and bottom 10% of the spar - or something pretty close to that.
Maybe some wiser head can clarify or confirm this statement.
So yes the advice from Bud and the UK is:
A. there is plenty of strength in this area
B. Place a 6 ply over lapping bid +/-45 so restore the strength of the root
plies on the front face of the spar.
Will
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Frans Veldman
Sent: 17 March, 2011 08:00
Subject: Re: Europa-List: FW: Will Daniell's wing - not as bad as I first
though
On 03/16/2011 06:16 PM, William Daniell wrote:
> Phew "things are never as good or as bad as they seem at first sight" -
> it wasn't as bad as I thought it might be.well not bad at all really.
Just remember that the strength comes from the glass, not the wood. The
wood is there just to keep the glass layers on the bottom and top of the
spar separated, so that all spar bending forces are converted into
compression and tension forces acting on these glass layers.
Apart from the Redux I think in this case I would reinforce the affected
area with two or three layers of uni tapered down over the surface just
to restore the original tension strength. Redux is a nice filler but I
think the tension strength might leave something to be desired.
Frans
Message 8
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| Subject: | Re: Purging a Rotax with an oil thermostat. |
On 03/17/2011 02:13 PM, William Daniell wrote:
> Can you explain a little more about how the mocal installation works please?
See http://www.thinkauto.com/laminova.htm
These things are mainly sold in Europe under the name Laminova and in
the US under the name Mocal.
I'm using a C43-90 (plus a small radiator).
Raimo Toivio (912S) is using a C45-112 and no radiator.
Jos Ockhuisen (914) was using a C43-180 as far as I can see from the
pictures.
> I am assuming that the heat exchanger goes in downstream of the radiator so
> that the oil is cooled at the coolest point of the system.
That's correct. I have mine inserted into the horizontal part of the
coolant hose just before the U-bend to the water pump.
> And also what are the specs of the heat exchanger.
See the same website, as well as various others.
Frans
Message 9
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| Subject: | Purging a Rotax with an oil thermostat. |
Frans
And no oil cooler at all then? That's interesting.
Of course the heat exchanger doesn't need to be in the airflow.
Thanks
Will
Message 10
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| Subject: | Re: Cambridge DOTH Cancelled |
Paddy,
Make it a Mon or Friday and l might be able to make it.
regards,
John
G-IPOD
:P
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http://forums.matronics.com/viewtopic.php?p=334217#334217
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