I’ve been flying 10 + years with the
eccentric shaft balls and springs removed and Webber jets
installed. At our normal rpm the balls would always be open in any case,
so the Jets just eliminated one more failure point (in my opinion)
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Jeff Whaley
Sent: Tuesday, October 06, 2009
3:45 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Seepage,
no more. Oil system
Hi Lynn,
with regards to your high-lighted comment about the check balls in the crank
– that is one item Bruce Turrentine
suggested be removed in an overhaul for aircraft applications, replacing the
balls with a carburetor jet to allow oil flow right away and continuously. So,
I did install carburetor jets in my e-shaft during rebuild. Any comments?
Anybody else out there do the same thing? Just curious as I’m
fighting high oil temps.
Jeff
Plus, the rotary is
cold blooded. The big bearings stress the oil film to no great extent, and the
major source of oil temperature is rotor cooling. At low speeds and idle, the
check balls in the crank don't even open to allow cooling oil to spray into the
engine. Those balls operate as a function of RPM not temperature.
On the other hand, you will get a water
temperature increase within one minute of startup. A water based coolant
has very low viscosity and flow to a distant heat exchanger will be immediate.
Like the rear heater in my school bus.
Lynn E. Hanover
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