Tom Webber wrote:
Paul, was just wondering if you had shipped the casting to me yet.
Let me know when you get a chance. Thanks Tom Webber
I US mailed it a couple of days ago. You should get it any minute.
Paul Lamar
Got mine Paul. Looks Great. Just need the cartridge now. I
am interested in the running it off the E-shaft idea.
Thanks for all your hard work.
Chris C.
microcosman.com/aircraft
Thank you Chris. I lost my ass on those things so thanks for
cutting my losses. I think I made 10 cents an hour machining them :)
I'll upload a new suggested mounting location for them in a few minutes.
It is rendering as we speak.
Hey Paul,
wth your water pump, I really didnt pay close attention to the thread or
your situation with the pumps. I dont believe that your technical merit
should go unnoticed and I would be glad to help defer your costs. But
can you give me a couple benefits to using the pump? Were you able to
assertain that it indeed improved the flow? Or was it just a way to move
the pump to a different location? I never did get the whole scoop on that.
You can private email me. Im writing from San Juan today. I will be close
to a puter again in a couple days to answer back.
Doug Mueller
RX-6 13BT
N900DM
Henderson,NV
rotaryrx6@cox.net
I was in San Juan once. A brief stop over when some stupid Miami AA gate employee
would not let me get on a U.S. Virgin Island flight with out a pass port with
the rest of the family. By the time I got a supervisor that knew what she
was doing I had to take a later puddle jumper flight that stopped over
in San Juan. For awhile there I thought I had to go back to LA and get
my passport.
You don't need the pump casting unless the stock pump does not fit under
your cowl. The stock pump can be cut down but extensive work is required
to make it as low as the engine. I can show you how to do that if you wish
to go that route.
The other advantage, discovered by my friend in Perth, Don Dunbar, is the
pump, if mounted low, will still pump water when the water level drops in
the engine because of a minor leak. IMHO this is one of the reasons
the Rotary overheats so rapidly when the water level gets a little low.
Most modern inline engines designed in the last 15 years or so use a
low mounted water pump for this reason.
The pump damage you see in the first picture here was caused I think by
running the water level low for awhile at high RPM. It is the only
explanation I can come up with. BTW it is also perhaps where the
Mazda pump cavitation myth started. We will know more about this if
Vance's 3 HP pump test rig is successful at pumping water
at 7000 or 8000 RPM.
The reasons most pumps have been mounted high in the last 100 years is
so they could mount a cooling fan on the same shaft and drive it with
the same belts. This no longer applies as most engines now use electric
cooling fans.
Paul Lamar
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