Charlie and Tupper England wrote:
Marel makes a device called an Inverse Oiler. It meters a precise amount
of MMO into the mixture. The amount is variable.
snips
Some sort of pump sounds like a good idea but MMO?
snip
Paul Lamar
Charlie and Tupper England wrote:
Just giving notice of a possible quick & easy source for a metering
pump, not an endorsement of MMO.
With all this discussion of auto oiler pumps, I'd like to return to Charlie and
Tupper's mention of the MMO
pump. If its variable, as they say, it sounds like this may be what's needed.
Does anybody know any more about it?
I, for one, have a problem with pre-mixing oil with my fuel. Fuel tank baffles
and slosh doors will preclude getting uniform and
accurate fuel mixtures into my Lancair ES. Must modify the Mazda injection
pump or find an alternative.
Tom Parkes
Tom, it has worked well for a number of people for quite some time.
In fact one person, who shall go un-named, forgot to mix oil with
the fuel before a cross country flight quite some time ago and the
engine is still running strong as far as I know.
Just wiggle your wings a bit as you take off.
Any pump that anybody comes up with must have a minimum flow at 6000 RPM
and wide open throttle. If the pump puts out an excess flow at lower
RPM's and less than wide open throttle I see no real problem with that
except perhaps too much oil consumption or fouled plugs. The fouled
plug scenario has never been confirmed to my knowledge.
According to this chart the engine needs at least 100 cc per hour
per rotor at 6000 RPM and wide open throttle.
The MMO pump, as I understand it, is intake manifold vacuum driven.
As someone has pointed out that is not what is needed. In fact it
is the opposite of what is needed. A simple direct drive pump
off the e-shaft would be better and probably adequate for an aircraft
engine that spends its entire life at 5000 RPM or above.
Paul Lamar
The Aircraft Rotary Engine Newsletter. Powered by Linux.
http://home.earthlink.net/~rotaryeng/ http://www.linux.org
