From: "Andrew Martin andrew@martinag.com.au" <flyrotary@lancaironline.net>
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Date: Mon, 25 Jun 2018 07:43:53 +0800
Message-ID: <CAJxaVD0o35kRwcz92aTnzdLcX_V4cOagr+vj+qK1AJshbMJb1w@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Oil
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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This engine and the flyrotary group continues to teach stuff I never
thought I needed to know.
Wish I=E2=80=99d bought a better cooler years ago rather than mucking aroun=
d with
the ones I had, ah well, knowledge is gained.

I very much agree with high flow rates in the coolant, I have no thermostat
and no restriction other than the radiator core, if it cools too much a
cowl flap will fix that. All coolant pump flow circulates through engine
and cooler in one loop so faster pump means more flow through engine for
higher heat dissipation.
On the oil, it was my understanding it works a bit differently, oil can
flow through multiple paths, oil flow rate through the rotors/engine is
farly constant from just above idle through to red line. Pump flow
increases expotentially with rpm but the excess flow is dumped by the OCV
back to sump. Also back to sump through front cover relief valve, thus not
being cooled, like in a poorly setup system like mine. Does not matter how
efficient the cooler is if it cannot get enough oil to go through it. This
has been my problem in getting oil flow capacity from cooler manufactures.
A pressure sensor before the cooler could have saved me wasted years.
The front cover relief valve is just that, The systems safety valve,
without it there is possibility in a blocked system pressure building to
levels that blow hoses/ coolers etc, better to have an annoying over
temperature issue to diagnose.
--=20
Regards Andrew Martin Martin Ag

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<div dir=3D"auto">This engine and the flyrotary group continues to teach st=
uff I never thought I needed to know.</div><div dir=3D"auto">Wish I=E2=80=
=99d bought a better cooler years ago rather than mucking around with the o=
nes I had, ah well, knowledge is gained.</div><div dir=3D"auto"><br></div><=
div dir=3D"auto">I very much agree with high flow rates in the coolant, I h=
ave no thermostat and no restriction other than the radiator core, if it co=
ols too much a cowl flap will fix that. All coolant pump flow circulates th=
rough engine and cooler in one loop so faster pump means more flow through =
engine for higher heat dissipation.</div><div dir=3D"auto">On the oil, it w=
as my understanding it works a bit differently, oil can flow through multip=
le paths, oil flow rate through the rotors/engine is farly constant from ju=
st above idle through to red line. Pump flow increases expotentially with r=
pm but the excess flow is dumped by the OCV back to sump. Also back to sump=
 through front cover relief valve, thus not being cooled, like in a poorly =
setup system like mine. Does not matter how efficient the cooler is if it c=
annot get enough oil to go through it. This has been my problem in getting =
oil flow capacity from cooler manufactures.</div><div dir=3D"auto">A pressu=
re sensor before the cooler could have saved me wasted years.</div><div dir=
=3D"auto">The front cover relief valve is just that, The systems safety val=
ve, without it there is possibility in a blocked system pressure building t=
o levels that blow hoses/ coolers etc, better to have an annoying over temp=
erature issue to diagnose.</div>-- <br><div dir=3D"ltr" class=3D"gmail_sign=
ature" data-smartmail=3D"gmail_signature">Regards
Andrew Martin
Martin Ag</div>

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