Hi! William/all
I guess my Jabiru regulator may be of differing construction but does
look the same as the Rotax one . Mine sits on posts to allow all round
cooling, about 1/2" above the flat P1 Footwell with no gills and never
gave any trouble. We were only advised to pipe cool air directly aimed
at the ignition coils which I did with the convoluted hoses off a
washing machine the intake end fixed just behind the spinner.
I believe the theory to be ...... if the hot air can't exit at the gills
then there is no flow in that direction to take the heat there, and so
cause the harm. Even the position of the gills doesn't really encourage
convection when on shutdown since they are not at the top cowl high
point for convection.
Andy Draper advised that they chose the position of the gills purely as
the best place to accommodate the ingress of rain water when parked up!
IMHO parking into wind with the access flaps open for 20 minutes is
always the answer, but I admit I never really gave it a lot of
consideration nor did I open the access doors!
Also IMHO a couple of suitably placed soldering mats above the muffler
is really the key to dissipate the convection of heat sufficiently long
to prevent it being a problem.
However I do think that Terry's blank off plate between the foot wells
would be constructive except if it could be extended down through the
engine mounts to below the alternator and ignition equipment it would do
an even better job.
I intend arranging my intercooler waste air to be directed across the
whole of the rear of the engine.......when the motor is running !
The high pressure radiator and oil cooler air needs to be entirely
ducted out of the engine bay rearwards to stop it spoiling the downwards
flow of the general cooling air.( except when you take off the warm air
to cabin heat.(ALL IMHO OF COURSE)
Regards
Bob Harrison.
Robt.C.Harrison
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of William
Mills
Sent: 18 November 2006 08:45
Subject: Re: Europa-List: FW: Was re:- Oil Cooler Thermostat ....now
"fit for purpose Gills slots in top cowl"
<william@wrmills.plus.com>
Terry, Have you got the 912S shroud fitted to your engine, which takes
cold
air from behind the prop and forces it down through the cylinder fins?
Assuming you have, does your ali baffle across the foot wells still aid
general under cowl cooling?
All, If the gills are blanked off, has anyone found an alternative
location
for the regulator to keep it in cool air?
Regards,
William
----- Original Message -----
From: "Terry Seaver (terrys)" <terrys@cisco.com>
Sent: Friday, November 17, 2006 5:36 PM
Subject: RE: Europa-List: FW: Was re:- Oil Cooler Thermostat ....now
"fit
for purpose Gills slots in top cowl"
> <terrys@cisco.com>
>
> Hi Bob,
>
> In case you don't already have this link, here is the location of our
> write-up for the cowl cooling mods, etc. Just look at the 'engine
> compartment cooling' section.
>
> http://terryseaver.home.comcast.net/N135TD_mods.htm
>
> It has been commented that not all aircraft are alike in their cooling
> issues, which I'm sure is quite true. The 912S installation acts
> differently from the 914, and the mono-wheel quite different from the
> tri-gear. Never-the-less, I believe the cowl mods we made might be
> useful for all installations using the factory XS cowl, in that our
mod
> forces cooling air to pass, top-to-bottom, around the cylinders and
out
> the rear. Without the baffle behind the engine (and the louvers
closed
> off), cooling air just passes behind the engine instead. Remember,
the
> Rotax has liquid cooled heads, BUT air cooled cylinders, which implies
> to me the need for baffling under the cowl similar to that done on
> air-cooled LyCo-saurs.
>
> Regards,
> Terry
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of
> R.C.Harrison
> Sent: Thursday, November 16, 2006 4:43 PM
> To: europa-list@matronics.com
> Subject: Europa-List: FW: Was re:- Oil Cooler Thermostat ....now "fit
> for purpose Gills slots in top cowl"
>
> --> <ptag.dev@tiscali.co.uk>
>
> Hi! All Europa Forum
> Below is a message sequence I published thanking Terry Seaver for his
> contribution of information. Seemingly it has been blocked by some
> "Baracuda Spam Firewall Protection system of the Matronics Site .
> Please give it access.
> Regards
> Bob Harrison G-PTAG
>
>
> -----Original Message-----
> From: R.C.Harrison [mailto:ptag.dev@tiscali.co.uk]
> Sent: 16 November 2006 22:23
> To: 'europa-list@matronics.com'
> Subject: Was re:- Oil Cooler Thermostat ....now "fit for purpose Gills
> slots in top cowl"
>
> Hi! Terry
> Thanks for the message below, it is invaluable at my stage of re-build
> and I was suspicious of the facts having had no gills on my Jabiru
> arrangement.
> I will be making reference about your results should I need a mod.
> application if you don't mind.
> Regards and "thanks a million"!
> Bob Harrison G-PTAG preparing for a 914 Rotax.c/w intercooler!
>
>
> --
>
>
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