engine pre-oiler

On Sat, 29 Dec 2007 12:18:02 -0800, "Stuart & Kathryn Fields"
wrote:

Maxwell: Do you know of a tiny gear pump or where to look that might be
used by hand or cordless drill? Is there a problem with gear pumps requiring
priming?
Yep in some ways the accumulator looks good except it does take up a bit of
space.
"Maxwell" wrote in message
...

"Stuart & Kathryn Fields" wrote in message
.. .
I've got to admit that idea has never been put forth, but I'm playing
with a helicopter and increasing weight is looked at very closely. My
accumulator that I built weighs 2.9# but the electric fuel pumps that I
have been reviewing weigh less than 2#. I think that the smog pump is
much heavier.
BTW I fly in the desert and corrosion is pretty much a non-issue. I had
a raw 4130 helicopter frame setting outside for about 10yrs and you could
wipe off the rust with a paper towel.
I would really like to have a system mounted on the helicopter that would
pre-oil just before start up. I some time have periods on the airshow
circuit where the engine does not get started for several weeks and I
would like to pre-oil prior to starting and be able to do that from the
cockpit or possibly from a manual pump providing that I can keep the
weight down.

Just some random thoughts...

- Three pounds for an accumulator seems like a good reliable and
reasonable weight solution to me, if you just don't forget to charge it
before each engine shut down.

- I don't think a fuel pump will reliably pump cold aviation motor oil.
Have you experimented with one?

- Have you considered a tiny gear pump you could spin with a hand crank or
cordless drill during preflight?



Grab the oil pump out of a Honda Goldwing

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