mike h wrote:

There are no advantages since the tall distributor was done away with
15 years ago. In fact there are many disadvantages. The engine was designed
to be run upright.

Paul Lamar

This has always made me wonder - do you need to run a dry sump in order to
do aerobatics? Not sure if the RVx/Cozy/etc planes y'all are building are
aerobatic or not, but it would seem that you'd starve the oil pickups
inverted or in an extended high-G turn.

Yes but sustained inverted flight will cause severe oil foaming no matter
what you do. The proper cooling and oil circulation in the rotor
depends on the gravity vector pointing straight down most of the time. 
In a coordinated high G turn the vector is pointed in the right direction.

Or will centrifugal force substitute for gravity?

Can you tell I've been all day in a conference with an aircraft
substantiation engineer? Why do we have to substantiate that our system will
work in a DC-8 during inverted flight? If you're inverted in a DC-8 there
are other issues more important than ACARS, most of them concerning
religion.

Mike Harrington

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