From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Monday, October 31, 2005
9:54 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Break-In?
Anyone have any more suggestions on
break-in tasks? I re-read some archived posts on the subject. It sounds like I
should keep it under 3000RPM for the first hour or so and then move it
up. Beyond that, and with no more leaks to fix, I’m at a loss to know
what, if anything, I need to do. I really didn’t expect it to be this
easy.
Count your blessings; and keep on
runnin’. I had probably about 2 hours on my engine when we started
dong the WOT power runs on the dyno; and I have no reason to believe that did
any damage. I’d only expect that the power would be a bit higher
after more hours.
Before first flight I want to have
at least 10 hours of ground running done with at least 1 hour at or above 5000
RPM – and that 1 hour can’t be the last hour.
Sounds like a good plan; spend your time
getting mixture and other measurements dialed in. I’ve got about 7
hours on mine with dyno runs and runs on the plane, but only a few minutes at
WOT at about 52-5300 rpm. I expect to get the hour or so of full power ground
runs after I get to the airport.
Should I be checking compression
every so often? Timing? Tear the engine down and Mic all the parts J ?
If it’s running smooth and putting
out good power I see no need to check compression – unless you really
want to. Can’t hurt to verify timing before you go fly. Look
for anything that might be vibrating – lines, wires, etc. and get
everything tied down; not just in the engine compartment, but anywhere on the
plane. Think about teardown to check wear after about 2000 hours; or some
clear indication of something not right.
Sounds like you’re doing great.
Best,
Al