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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