From: "Marc Wiese cardmarc@charter.net" <flyrotary@lancaironline.net>
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To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
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Subject: RE: [FlyRotary] Re: Waterpump Rpm
Date: Thu, 17 Aug 2023 14:08:36 -0500
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Steve,
What company in New Zealand had this stuff? What dia pulley and where =
from on alternator? Inquiring minds want the specs?

Marc

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 =
tamper went up considerably and I reasoned this was caused by =
cavitation.
In response I purchased a race pump from New Zealand.

My water pump is running at OEM speed, but I slowed my alternator with a =
larger pulley.

> Hi : What is the optimum waterpump rpm for the 13B as i can modify the =

> pulley 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 the 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 =
impellor turns 6500 x 1.18 ???
> Must i put on a bigger diameter pully on the pump for a flo of round =
about 100 L per minute.?
> Don=E2=80=99t know  ?
>=20
> If somebody can help me with that