Today's Message Index:
----------------------
1. 01:58 AM - Re: Vents (John Wighton)
2. 06:05 AM - Re: Vents (Patrick Tunney)
3. 10:16 AM - Re: Re: Vents (Bud Yerly)
4. 03:53 PM - Re: Re: 914 Servo Problem -- broken copper wiper -- is there a fix? (GTH)
5. 03:57 PM - Re: Vents (John Wighton)
6. 04:03 PM - Re: Re: 914 Servo Problem -- broken copper wiper -- is there a fix? (GTH)
7. 04:23 PM - Re: Vents (Griffo)
Message 1
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There has been a fair amount of discussion over the location of vents in the Europa,
primarily due to interest in the round Ventomatic style of vent.
The location shown in this post , close to the waterline (WL) of the wing LE, is
probably too low. The shown location differed from that indicated in the build
notes that l have found.
The protruding exhaust disrupts the airflow at this WL, making it turbulen. Two
effects: a) the NACA duct does not work efficiently. b) toxic gases from the
exhaust stub can enter the cockpit.
My Europa has NACA ducts closer to the fuse split line and work very well. As
do many other with the standard duct shape in or around this location.
The demisting of my cockpit is achieved with 2 off PC fans of around 60mmdiameter
mounted in a carbon fibre plate fixed to the P1 side of the panel inner moulding.
This picks up cabin air, slightly heated by the avionics and instruments
and blows it onto the screen. I fitted it after leaving the aircraft parked
outside for days in autumn, in flight it misted and the side vents were only
effective in helping to demise the screen when flying above 100kts.
I have no DV panel and had to land with limited viz whilst mopping moisture off
the screen. My (then) 11 year old son asking me is this normal?.
So, in my opinion other posts are correct, location, location is the key.
On the ACCEL electric aircraft the team decided to locate a very small NACA duct
just in front of the vast screen and created a duct similar to the one shown
linked in this post. The base of the screen at the centreline is a good taping
point in the Europa, although it would need some surgery and a displaced cowling
break line to make it a fixture. A ductING joint could be fashioned but
Scat hose should not be used as it is high loss.
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=501118#501118
Message 2
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I am just in the process of installing the round style air o vents.
could i please get feedback on the best possible location and what worked well
before i comit to the hole in the fuselage.
Images would really help.
Thanks
Pat
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=501119#501119
Message 3
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I've had many discussions over the years on cockpit ventilation and I summa
rized them in a pdf for you guys to look at. I'm always interested in how
to make things work.
My own aircraft is tolerable in the Florida heat, but frankly it too can be
improved.
Best Regards,
Bud Yerly
-----Original Message-----
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> On Behalf Of John Wighton
Sent: Sunday, March 28, 2021 4:58 AM
Subject: Europa-List: Re: Vents
There has been a fair amount of discussion over the location of vents in th
e Europa, primarily due to interest in the round Ventomatic style of vent.
The location shown in this post , close to the waterline (WL) of the wing L
E, is probably too low. The shown location differed from that indicated in
the build notes that l have found.
The protruding exhaust disrupts the airflow at this WL, making it turbulen.
Two effects: a) the NACA duct does not work efficiently. b) toxic gases
from the exhaust stub can enter the cockpit.
My Europa has NACA ducts closer to the fuse split line and work very well.
As do many other with the standard duct shape in or around this location.
The demisting of my cockpit is achieved with 2 off PC fans of around 60mmdi
ameter mounted in a carbon fibre plate fixed to the P1 side of the panel in
ner moulding. This picks up cabin air, slightly heated by the avionics an
d instruments and blows it onto the screen. I fitted it after leaving the
aircraft parked outside for days in autumn, in flight it misted and the sid
e vents were only effective in helping to demise the screen when flying abo
ve 100kts.
I have no DV panel and had to land with limited viz whilst mopping moisture
off the screen. My (then) 11 year old son asking me =9Cis this norm
al?=9D.
So, in my opinion other posts are correct, location, location is the key.
On the ACCEL electric aircraft the team decided to locate a very small NACA
duct just in front of the vast screen and created a duct similar to the on
e shown linked in this post. The base of the screen at the centreline is
a good taping point in the Europa, although it would need some surgery and
a displaced cowling break line to make it a fixture. A ductING joint could
be fashioned but Scat hose should not be used as it is high loss.
--------
John Wighton
Europa XS trigear G-IPOD
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Message 4
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| Subject: | Re: 914 Servo Problem -- broken copper wiper -- is there |
a fix?
Le 24/03/2021 02:33, PCahill a crit:
> Gilles,
>
> I think everyone on this list would benefit from knowing about an equivalent
motorcycle servo for a lot less cash! I looked myself for such a part... no joy!
>
Paul and all,
Went flying today and could retrieve the servo in the hangar.
Fortunately the invoice was still attached to the package, so here goes :
Kawazaki Ninja ZX10R Exhaust Valve servo Motor.
My buddy found it on eBay in 2016 for $14.99
FWIW,
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr
Message 5
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Reply to Pat Tunney
I will post a sketch of the preferred zone when l go to the office tomorrow.
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=501123#501123
Message 6
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| Subject: | Re: 914 Servo Problem -- broken copper wiper -- is there |
a fix?
Le 29/03/2021 00:52, GTH a crit:
>
> Fortunately the invoice was still attached to the package, so here goes :
>
> Kawazaki Ninja ZX10R Exhaust Valve servo Motor.
>
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr
Message 7
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Very comprehensive article Bud - covered the topic very well.
Seems KJ might have his, very nicely finished, NACA vents to low down on the fuselage.
--------
46
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http://forums.matronics.com/viewtopic.php?p=501125#501125
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