----- Original Message -----
Sent: Monday, February 09, 2009 9:30
AM
Subject: [FlyRotary] NEW failure mode
for 13B
Well, I haven't heard of this happening before
-- I was ground running my engine to tune it with the EM-2 and
EC-2. Ran for almost an hour, at various rpm's to change the manifold
pressure and tweak the settings. Cooling working well, I had the top cowling
off to allow good exit area since I was tied down. Coolant pressure about 14
psi as reported on the EM-2.
Engine was running good, took it up to ~6000
rpm swinging a 76x76 Catto prop, when suddenly there was steam and fluid on
my windshield. Shut it down by killing power to the EC-2. Coolant
everywhere.
Got out and looked to diagnose the problem --
NOT my plumbing. A FREEZE PLUG in the iron housing had blown out.
Rapid coolant dump.
Secondary effect -- Since I shut down suddenly
from full tilt, either the proximity of the cowl to the exhaust, or possibly
some of the coolant on the exhaust started a small fire on my cowl. Put it
out with extinguisher, but corner is charred.
Bill Schertz
KIS Cruiser
#4045
N343BS
Now in repair mode.