From: "Andrew Martin andrew@martinag.com.au" <flyrotary@lancaironline.net>
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Date: Sat, 16 May 2020 12:50:10 +0800
Message-ID: <CAJxaVD0ff_iaYYiHQe38zLng3182Zbc9hDB0Qb_iRQ4YQthNvQ@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Water Pump
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Steve. I used Re-medy pump as my motor came to me minus a pump so had to
find alternative and that was the only aftermarket one available. At that
stage Todd was still building so I was going to wait on his results re
elect pump, but then Re-medy has worked well without issue.
It has to be part of whole package so is difficult for us as each has
slight differences in installations. Mine has no restrictors other than
pipe friction & radiator. Both these are minimal as pipes are all 25mm
internal and a large radiator. My theory is to allow coolant to flow as
fast as possible all the time. Cavitation happens when the pump impeller
slips in the coolant. ie: when impellor is spinning too fast for what can
flow through all restrictions. Or when pump is accelerating the mass of
coolant like in a car when changing gear/ revs frequently.
In aircraft operation, once the coolant flow is up to speed, the pump will
only require enough power to overcome friction & restrictions within system=
.
Basically if you want a restrictor/thermostat, slow your pump down also to
protect the pump or minimize other restrictions like small hoses &
radiators. or design the system to allow full flow with little pressure
difference in inlet & outlet of the pump.
Andrew

On Sat, 16 May 2020, 7:15 am Stephen Izett stephen.izett@gmail.com, <
flyrotary@lancaironline.net> wrote:

> Thanks Guys for the feedback re pumps.
> Andrew, what information did you get that caused you to change to the
> Re-medy pump?
> Was it from a reputable source, like racers? I=E2=80=99ve put it in the d=
iary to
> call GoGear when I=E2=80=99m back in Perth early next week.
>  I have little trust in advertising these days and if I=E2=80=99m going t=
o go to
> the trouble and expense I=E2=80=99d like some science behind it.
>
> Cheers
>
> Steve
>
>
> > On 15 May 2020, at 11:17 pm, Andrew Martin andrew@martinag.com.au <
> flyrotary@lancaironline.net> wrote:
> >
> > I=E2=80=99ve had Mazmart Re-medy pump in since start. Seems thats been =
one
> component I=E2=80=99ve not had to worry about.
> > Andrew
> >
> > --
> > Regards Andrew Martin Martin Ag
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>

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<div dir=3D"auto"><div dir=3D"auto">Steve. I used Re-medy pump as my motor =
came to me minus a pump so had to find alternative and that was the only af=
termarket one available. At that stage Todd was still building so I was goi=
ng to wait on his results re elect pump, but then Re-medy has worked well w=
ithout issue.<div dir=3D"auto">It has to be part of whole package so is dif=
ficult for us as each has slight differences in installations. Mine has no =
restrictors other than pipe friction &amp; radiator. Both these are minimal=
 as pipes are all 25mm internal and a large radiator. My theory is to allow=
 coolant to flow as fast=C2=A0as possible all the time. Cavitation happens =
when the pump impeller slips in the coolant. ie: when impellor is spinning =
too fast for what can flow through all restrictions. Or when pump is accele=
rating the mass of coolant like in a car when changing gear/ revs frequentl=
y.</div><div dir=3D"auto">In aircraft operation, once the coolant flow is u=
p to speed, the pump will only require enough power to overcome friction &a=
mp; restrictions within system.</div><div dir=3D"auto">Basically if you wan=
t a restrictor/thermostat, slow your pump down also to protect the pump or =
minimize other restrictions like small hoses &amp; radiators. or design the=
 system to allow full flow with little pressure difference in inlet &amp; o=
utlet of the pump.</div></div>Andrew<div dir=3D"auto"><br><div class=3D"gma=
il_quote" dir=3D"auto"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, 16 May=
 2020, 7:15 am Stephen Izett <a href=3D"mailto:stephen.izett@gmail.com" tar=
get=3D"_blank" rel=3D"noreferrer">stephen.izett@gmail.com</a>, &lt;<a href=
=3D"mailto:flyrotary@lancaironline.net" target=3D"_blank" rel=3D"noreferrer=
">flyrotary@lancaironline.net</a>&gt; wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex">Thanks Guys for the feedback re pumps.<br>
Andrew, what information did you get that caused you to change to the Re-me=
dy pump?<br>
Was it from a reputable source, like racers? I=E2=80=99ve put it in the dia=
ry to call GoGear when I=E2=80=99m back in Perth early next week.<br>
=C2=A0I have little trust in advertising these days and if I=E2=80=99m goin=
g to go to the trouble and expense I=E2=80=99d like some science behind it.=
<br>
<br>
Cheers<br>
<br>
Steve<br>
<br>
<br>
&gt; On 15 May 2020, at 11:17 pm, Andrew Martin <a href=3D"mailto:andrew@ma=
rtinag.com.au" rel=3D"noreferrer noreferrer" target=3D"_blank">andrew@marti=
nag.com.au</a> &lt;<a href=3D"mailto:flyrotary@lancaironline.net" rel=3D"no=
referrer noreferrer" target=3D"_blank">flyrotary@lancaironline.net</a>&gt; =
wrote:<br>
&gt; <br>
&gt; I=E2=80=99ve had Mazmart Re-medy pump in since start. Seems thats been=
 one component I=E2=80=99ve not had to worry about. <br>
&gt; Andrew<br>
&gt; <br>
&gt; -- <br>
&gt; Regards Andrew Martin Martin Ag<br>
<br>
<br>
--<br>
Homepage:=C2=A0 <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer nor=
eferrer noreferrer" target=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:=C2=A0 =C2=A0<a href=3D"http://mail.lancaironline.net:81/=
lists/flyrotary/List.html" rel=3D"noreferrer noreferrer noreferrer" target=
=3D"_blank">http://mail.lancaironline.net:81/lists/flyrotary/List.html</a><=
br>
</blockquote></div></div></div>

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