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Bill,
That's a good argument for a better impeller, but I
think Mark is concerned that the Renesis impeller might be marginal in our
application, logic would indicate that although it's not optimum, it will do the
job - racing aside.
Having said that Mark I would be interested
in your flow testing results.
George ( down under)
Mark,
Here
is the thing to think about. A friend of mine who races rotary cars asked
about the need for a better water pump. I asked him how long his longest
straight is. "About 3/4 of a mile" he said. Well if you are running your
airplane in a race the straight away might be 500 miles long! You would be
hard pressed to find a circumstance where you had too much water flow.
Bill
Jepson
Sent from my Verizon Wireless BlackBerry
From: Mark Steitle <msteitle@gmail.com>
Date: Tue, 11 May 2010 08:08:50 -0500
To: Rotary motors in
aircraft<flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: alternative water pump
Bobby,
As Tracy has said, "Better is the enemy of good enough". So, the
question is, is the stock Renesis water pump "good enough" to do the job we're
asking it to do?
Mark
On Fri, May 7, 2010 at 7:44 PM, Tracy Crook <tracy@rotaryaviation.com>
wrote:
My
Renesis pump has a grooved pulley as well. I drive it in the normal
fashion. I think the 3rd gen was driven from the back
side?
Tracy
On Fri, May 7, 2010 at 7:52 PM, Mark Steitle <msteitle@gmail.com> wrote:
Bobby,
Is your Renesis WP driven off the back side of the belt? The
aftermarket pulleys I bought have grooves, indicating that it is driven
off the grooved sided of the belt. I'll have to look tomorrow when
I'm out at the hangar.
Mark
On Fri, May 7, 2010 at 11:20 AM, Bobby J. Hughes
<bhughes@qnsi.net> wrote:
Mark,
I
spoke with Racemate a couple of years back about machining a better
impeller for the renesis. He needed the water pump housing for proper
clearances. He looked at the renesis impeller and thought it was
junk.
Bobby Hughes
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On Behalf Of Mark
Steitle
Sent: Thursday, May 06, 2010 6:03 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: alternative water
pump
Kelly,
Keep in mind that I'm comparing it to a 20B water pump, not a 13B
water pump. The 20B pump (housing & cartridge, no pulley)
weighs 11.8 lbs. The Renesis pump & housing after being cut
off the front cover is 4.5 lbs. So, I potentially can save over 7
lbs. The big question is if the Renesis WP flow is enough water to
cool the 20B.
At present, I'm still gathering parts for the conversion, so I'm
currently running the stock 20B pump.
Any idea what the Meziere pump weighs? You'll need to add the
weight of brackets too. The Renesis pump will fit onto the front
cover same as the stock pump... well, with a few minor mods.
Mark S.
Michael,
Beautiful pump but did you see a few posts
back that Mark Steitle has
adapted a RX8 aluminum pump to his 20B and reported several lbs
of
weight saving..........Jump in here Mark............Photos
welcome !!.........
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
-------------- Original message from "Michael Silvius" < silvius@gwi.net>:
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