>  Assuming you install a dry sump system the big questions is how the drain
     > back oil out of the rotors oil will behave. It might drain back better than a
     > plugs up engine.
     >  On the other hand the main bearing oil drain backs point straight down and
     > they may be more of a problem.
     >
     > If you must run inverted, connect one scavenge line to the breather hole.
     > That will collect the rotor and bearing oil from the center section when
     > inverted. And the other to a line through the front case to a spot half way back on
     > the bottom. Or weld a fitting through a rotor housing near the pan rail. To
     > collect the center section oil when upright.
     >
     > The first one I did I pulled the oil out of the hole left by removing the
     > stock pressure relief plunger gizmo in the left rear. I put that suction fitting
     > into the oil pressure banjo bolt hole.
     >
     > On the front,  I cut away a bit of the relief plunger hole. I welded the
     > relief port shut and pulled the oil out of the fitting that would have sent it to
     > the cooler.
     >
     > You still need a breather port to connect to the dry sump tank. You can weld
     > in a fitting through a rotor housing or the front case any where or if you are
     > crank triggering the ignition, make a plug for the distributor hole and add
     > the fitting there. It matters not that the fitting may be submerged in oil some
     > of the time. The scavenge sections of the pump are both bigger than the
     > pressure section of the pump and they pump against just about zero resistance. So
     > they try to pull out more than is going in as blowby and lube oil. The vent
     > line flows backwards, letting replacement air volume into the engine from the oil
     > tank. The only breathing is from the tank and that is done through a valved
     > breather (Christian.) I don't see a problem with the seals and the drainback
     > holes. There are bearings and seals running flooded all of the time. Like a wet
     > sumped race engine when you stand on the brakes and the bearing spill piles up
     > around the front seal. If a seal starts to fail in a dry sumped engine, it is
     > not usual to leak oil but just suck in a little air. They don't even use oil
     > slingers to help the seals anymore. It just is not a problem.
     >
     > Lynn E. Hanover

Ben Baltrusaitis wrote:

Lynn,
How would you handle oil pickup in the oil tank? Must I put a flop tube 
in there or could I get away with a pickup about halfway
up the tank, figuring the tank is not supposed to go empty 
like a fuel tank and should be in oil all the time. Oh no, what about
knife edge flight? Thanks for your insight.

Ben

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