Hi! Kingsley, Firstly congratulations on you first flight.
Have you the water radiator set 2" below the oil cooler ? and the gap below
and to the side of both matrices closed up?
Regards
Bob H G-PTAG
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Kingsley Hurst
Sent: 24 December 2017 11:40
Subject: Europa-List: Cooling a Mono Classic
I have a plain vanilla 80HP Mono Classic. Plumbing of the coolant radiators
are as per the book and the oil cooler is mounted underneath the spinner as
recommended by Europa.
Cylinder head and Oil temps were totally unsatisfactory until I made two
ugly fixed cowl flaps (temporary ones) that allow a better air exit path.
Today, with a ground temp of 38C (@400 ASL) I climbed from ground level to
8,500 ft at 80kts IAS on full throttle and 5500 RPM. Max CHT and Oil Temps
reached were 102C and 116C respectively. In cruise at 8500 ft on full
throttle (22" MAP) and 5000 RPM with OAT of 17C, the temps dropped to 70C
and 84C respectively which is a bit cool but easily fixed. I'm happy with
the cooling at this moment but am unsure how it will be in the hot
conditions of North Western Queensland where the ground temp is often around
42C to 45C but I digress.
After shutting down today, the OAT was 39C. CHT was 91C and Oil temp 88C.
After opening the hatches on top of the cowl, I felt the temps of the two
coolant radiators in the front of the cowl and one was noticeably hotter
than the other. This is understandable as both radiators are in series.
Ignoring the complexity of the required plumbing, I then contemplated what
might happen if the coolant radiators were connected in parallel.
I reasoned that if in parallel :-
* The temperature differential (deltaT?) between the coolant temp and
the OAT would be maximum on both radiators giving more efficient cooling as
opposed to different differentials in the series set-up .
* The flow rate through each radiator would be halved so coupled to
the higher deltaT, I assume better cooling as a result.
My question,
Does anybody have first hand experience with such a set-up and if so, do you
have any documented evidence of improved cooling as a result?
Cheers and all the best for the Festive Season to all.
Kingsley in Oz.
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