From: "Le Roux Breytenbach breytenbachleroux@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Waterpump Rpm
Date: Wed, 16 Aug 2023 19:42:04 +0200
Message-Id: <97D73896-AD29-4D2F-A1A3-1FA16CE03B24@gmail.com>
References: <list-2296112@lancaironline.net>
In-Reply-To: <list-2296112@lancaironline.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Steve: Thank you so much=20


Sent from my iPhone
Le Roux Breytenbach=20

> On 16 Aug 2023, at 08:25, Stephen Izett stephen.izett@gmail.com <flyrotary=
@lancaironline.net> wrote:
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> =EF=BB=BFHi le Roux
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> On the Renesis I=E2=80=99ve put a race pump on to =E2=80=98reportedly=E2=80=
=99 reduce cavitation as the basic pump is reported to cavitate at the rpm=E2=
=80=99s we operate in during take off.
> When I took out a restrictor in the return to the radiator on one flight t=
amper went up considerably and I reasoned this was caused by cavitation.
> In response I purchased a race pump from New Zealand.
>=20
> My water pump is running at OEM speed, but I slowed my alternator with a l=
arger pulley.
>=20
> Steve Izett
>=20
>=20
>=20
>=20
>> On 16 Aug 2023, at 11:44 am, Le Roux Breytenbach breytenbachleroux@gmail.=
com <flyrotary@lancaironline.net> wrote:
>>=20
>> Hi : What is the optimum waterpump rpm for the 13B as i can modify the pu=
lley diameter and ratio=E2=80=99s for my set - up
>> The data i have is that at the standard ratio is 1:1.18  at 6500 rpm for t=
he 13B the pump flo is round about 150 - 160 L per minute.
>> So my question: If i run on 6500 rpm for take off then the waterpump impe=
llor turns 6500 x 1.18 ???
>> Must i put on a bigger diameter pully on the pump for a flo of round abou=
t 100 L per minute.?
>> Don=E2=80=99t know  ?
>>=20
>> If somebody can help me with that
>>=20
>> Regards Le Roux
>>=20
>>=20
>> Sent from my iPhone
>> Le Roux Breytenbach=20
>> --
>> Homepage:  http://www.flyrotary.com/
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t.html
>=20
>=20
> --
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