From: "David COOK hoursaway1@comcast.net" <flyrotary@lancaironline.net>
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Date: Fri, 15 May 2020 10:30:00 -0400 (EDT)
Reply-To: David COOK <hoursaway1@comcast.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message-ID: <666584272.1376407.1589553001011@connect.xfinity.com>
In-Reply-To: <list-241975@logan.com>
References: <list-241975@logan.com>
Subject: Re: [FlyRotary] Re: Water Pump
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Importance: Medium

Find who is finishing races, I use oversized pully, 13B, 6250rpm takeoff, 5=
500rpm cruise 165kts, aprox.8gph, RV6A Rotary.
> On May 15, 2020 at 10:16 AM "Stephen Izett stephen.izett@gmail.com" <flyr=
otary@lancaironline.net> wrote:
>=20
>=20
> Thanks Matt.
> Steve
>=20
> > On 15 May 2020, at 10:14 pm, Matt Boiteau mattboiteau@gmail.com <flyrot=
ary@lancaironline.net> wrote:
> >=20
> > There's so much information all over the place, it's all good and bad. =
On the car forums, there is no consensus. Some same stock is just fine, som=
e say to change the pulley on stock, and some swear by the Mazmart RE-medy.=
 Then some swear on belt vs electric. lol. It's all over the place.I have b=
oth the Mazmart and oversized pulley on stock. Once I have a baseline of da=
ta, I'll switch between the two and compare logs.
> >=20
> > With the 2.85 psru, "I think" you'll be okay with a stock waterpump.
> > With Neil's 3.17 psru, you'll want to do pulley swap or mazmart
> >=20
> > - Matt Boiteau
> >=20
> >=20
> > On Fri, May 15, 2020 at 10:02 AM Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
> > Thanks guys.
> > I=E2=80=99ve heard various reports, but i had thought the consensus was=
 the Renesis pump didn=E2=80=99t cavitate till past 8K.
> > I do want to be able to sustain 7500rpm for at least a few minutes.=20
> > Should I change to a larger pump pulley or undersize the eccentric shaf=
t pulley?=20
> > Is there clear evidence from the racers and not simply the producers of=
 pumps etc.?
> > I do have a larger pulley on the Alternator.=20
> > Cheers.
> > Steve
> >=20
> > > On 15 May 2020, at 9:47 pm, Bobby J. Hughes bhughes@qnsi.net <flyrota=
ry@lancaironline.net> wrote:
> > >=20
> > > Steve,
> > > =20
> > > I didn=E2=80=99t see any reason to replace the stock 2004 water pump.=
 An aftermarket impeller / pump is available but the car forums indicate ma=
ny have failed in a short period of time.  https://shop.mazmart.com/en/rx8-=
re-medy-high-flow-water-pump          I  used an underdrive main pulley fro=
m the beginning. Unorthodox Racing I believe.
> > > =20
> > > Bobby
> > > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=
=20
> > > Sent: Friday, May 15, 2020 6:58 AM
> > > To: Rotary motors in aircraft
> > > Subject: [FlyRotary] Re: Water Pump
> > > =20
> > > Thanks Todd.
> > > Enjoyed your reply. Thanks a heap.
> > >=20
> > > Has anyone got definitive knowledge re the 2004 renesis 13b water pum=
p.=20
> > > Is there a replacement with significantly better flow or lower cavita=
tion that I should retrofit to maximise cooling capacity?
> > >=20
> > > Steve
> > >=20
> > > > On 15 May 2020, at 6:28 pm, Todd Bartrim bartrim@gmail.com <flyrota=
ry@lancaironline.net> wrote:
> > > >=20
> > > > Well, I gotta admit that I'm a stubborn SOB. and way back when, ano=
ther stubborn SOB whom I shouldn't name, but his initials are Paul Lamar...=
. was adamant that no way ever on God's green earth would an electric water=
 water pump have any hope of cooling anything bigger than a lawnmower. So b=
asically... it was challenge accepted!=20
> > > > Now at the time there was another Ozzie frequenting this list by th=
e name of Leon Promet who had some rotary racing experience and was a big p=
roponent of the EWP. (RIP Leon) But he was also a great talker and an enter=
taining fellow whom I enjoyed reading his many post on varied aspects of ro=
tary engines. The EWP also promised a solution to a few other issues that w=
ere certainly not insurmountable, such as clearance for the mechanical wate=
r pump which usually resulted in an unsightly and draggy cowl bump. At the =
time, that seemed like something I wanted to avoid, due to drag and all tha=
t $%^* but after figuring out that I never should've built an iAirplane lik=
e all the other latte sucking so called experimenters out there, I started =
to realize that a Van's RV, while it is a great design and is perfect for m=
any, many assemblers out there, it's probably not the plane I should've bui=
lt. Don't get me wrong, it's a great plane and lot's of fun, but it's not r=
eally the plane I should be flying. The attached picture shows the automoti=
ve equivalent to my airplane.
> > > > Anyways, at the end of the day, I've got a fast airframe with big d=
raggy bushwheels, that while not quite a STOL plane can still cruise sorta =
fast, blah, blah, blah, blah.....
> > > > So anyways, I like it, I think the EWP is a great idea and it does =
work. And I'm an experimenter. Enough said.
> > > >=20
> > > > Todd Bartrim (I should've went to bed instead of pouring a rum and =
answering that email.... )
> > > >=20
> > > >=20
> > > > On Fri, May 15, 2020 at 1:20 AM Stephen Izett stephen.izett@gmail.c=
om <flyrotary@lancaironline.net> wrote:
> > > > Hi Todd. What was the logic behind the choice to go with an electri=
c water pump.
> > > > Was it concerns over cavitation at high rpm or as a backup.
> > > > Sorry if this has already been talked through.
> > > >=20
> > > > Steve Izett
> > > >=20
> > > > > On 15 May 2020, at 3:40 pm, Todd Bartrim bartrim@gmail.com <flyro=
tary@lancaironline.net> wrote:
> > > > >=20
> > > > > Yup, just the stock wheel. the turbo is an Hitachi 18S-2S. I stil=
l think you should take LeRoux up on his offer of that turbo. You could eit=
her modify the turbo manifold or use it to model a custom made manifold. Ei=
ther way would likely be easier than trying to fit an aftermarket turbo. Th=
ere was not a stock Renesis turbo so you're not gonna find anything easier.
> > > > > There's always something like this https://www.rx8performance.com=
/products/rx-8performanceturbokit and it doesn't look too complicated, or h=
eavy, or expensive..... nahh, I'd still find a way to attach that old gen t=
urbo to your Renesis.=20
> > > > > I'm using the Davies Craig EWP130 https://daviescraig.com/product=
/ewp130-12v-130lpm34gpm-remote-electric-water-pump-8180/ewp130-electric-wat=
er-pump-alloy-12v-8180
> > > > >=20
> > > > > Todd Bartrim (rebuilding a water pump right now, but it's a well =
water pump)
> > > > >=20
> > > > >=20
> > > > > On Thu, May 14, 2020 at 3:20 PM 12348ung@gmail.com <flyrotary@lan=
caironline.net> wrote:
> > > > > Todd,
> > > > >=20
> > > > > Are you running the standard hot section turbine wheel? Do you ha=
ve the hitachi RX7 turbo? Also what model water pump did you use??
> > > > >=20
> > > > > Regards,
> > > > >=20
> > > > > Neil.
> > > > >=20
> > > >=20
> > > >=20
> > > > --
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> > >=20
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> > >=20
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> > >=20
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