Terry,
While I acknowledge your comments and development. My comments where based
on my experience with a monowheel AND on Andy Draper's comments on the
original Europa development with G-YURO. Plainly there are variable issues
with individual aircraft. I have the Graham Singleton firewall fitted to my
aircraft and have never had any problems apart from the Evans stuff seeming
to push the cooling system past its capability. However, what exactly do
you mean by 'closing off the area between the footwells'. Is this a problem
that the Singleton firewall avoids?
Regards,
Mike
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Terry Seaver
(terrys)
Sent: 01 April 2009 18:46
Subject: RE: Europa-List: 914 Waste gate servo mounting position question
We spent nearly a year looking into and fixing our cooling problems. We
installed temperature probes throughout the engine compartment and performed
data logging on those temps, as well as engine parameters (rpm, MP, oil
pressure, oil and water temps, CHTs, and fuel flow). Each parameter was
sampled once every 2 seconds during flight and downloaded to a lap-top after
the flight. We found that the gills allowed the upper cowl inlet air to
escape without contributing much to engine cooling. After closing them off,
we found no significant rise in upper cowl temps, but with a noticeable
improvement in lower cowl temps. Closing off the area between the foot
wells was the final fix that made the temps come down, from a max of 450 deg
F inside the cowl to a max of 250 deg F.
Regards,
Terry Seaver
A135 / N135TD
XS monowheel with 912S
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Mike Parkin
Sent: Wednesday, April 01, 2009 9:31 AM
Subject: RE: Europa-List: 914 Waste gate servo mounting position question
I do not have the "gills" open (left them closed since it has been
established that they were a development item providing little cooling
benefit on shut down(positioned too low) and are now a "leftover" item.)
Regards
Bob Harrison.G-PTAG
Bob,
That statement is just not correct. In flight, there is a noticeable flow
of hot air from the gills - obviously aiding the flow of cooling air across
the cylinders. Perhaps that is why you have had cooling issues on Jabiru
and Rotax.
Regards,
Mike
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