Chris,
You didn’t say which line burst. I recommend you test your
oil pressure sender. Hook it up to your air compressor hose and compare
the two readings. You should be able to do this close to the engine so
you can read it.
Check the hose and fittings after the filter (all of them) for some
kind of blockage. If the sender is ok, you may have a blockage between
the filter and the sender. Could be the exit from the filter adapter.
Did you make up your own hoses and install the ends? If you didn’t
use a mandrel, it is possible to get a sliver of the inside of the hose that
could come up and partially block the hose.
Like Al, I don’t see how this could happen. Maybe Lynn will know.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Chris Barber
Sent: Friday, October 02, 2009
6:22 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Good, bad
news...too much oil pressure somewhere
As loyal readers may recall I have been
concerned about oil seeping/leaking out from around my oil filter seal on my
remotlely mounted oil filter. I have replaced the remote mount and tried
4 different K&N filters and an STP filter to no avail.
Well, in the tradition of test it til it breaks, after
focusing on some other tasks today, I cranked up the engine one last time to
see if my "task" had screwed anyting up. Since is was a coooool
85 degress and my oil temps were showing about low after start up, I figured I
would go WOT and see how long it would take to get to 210....uh, pretty quick
for those curious (even though I can idle at 1400 - 1700 dang near all
day). I looked to the engine and could see the small drip marks of the
oil leak, continued at full throttle for a few more seconds and shut
down. I got out of the plane and saw a huge puddle of oil where the small
amount had been. Upon closer examination, oil was all over the bottom of
the engine and I had a nicely oiled prop (pusher Velocity). Almost
immediatly I noticed one of my heavy duty Aeroquip oil lines had burst.
Hmmmmm, the Oil Pressure reading never went over 75 and was around 35 when idle
(as a matter of fact, at idle, it is usualy around 30). I
belive these reading to be in the normal ranges.
Anyway, I have plans tonight so I had to push the
bird back into the hangar and think about things. As suspected, the
seeping remote mount was a mere symptom. Now to determine what was
causing the apparantly high pressure near the remote mount and the burst
hose. The lines are fed to the mount correctly, but I shall check
again. Y'all's thougts are appreciated and sought.
On a better note, after fighting some electrical issues,
esp with my coils, I kept getting inconsistant reading on the
multimeter when using the Mazda coil harness. I finely gave in and
cut it to pieces and wired it direclty using just the connectors into
the coil and eleminating the plut into the old harnes by directly
soldering the wires. This seems to have solved the problem. It is
great to turn off secondary, primary/coils, injectors in various
patterns and the engine still run as expected. Now, I am
convinced that the rotary can run, if poorly, on ONE coil as
it may do if someone forgot to reattach the leading coil spark plug wire on
rotar one......don't ask how I know <g>.
Well I am off to a fine dining experience...or so I hope. Great
to comtemplate tomorrows activity.
Thanks for your attention.
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