Engine break in

[az_gila]

Originally Posted by Mel

ALL Experimental operating limitations issued after the adoption of the AC should have the inclusion.

"Unless operating in accordance with AC 90-116, Additional Pilot Program for Phase I Flight Test, only the minimum crew necessary to fly the aircraft during normal operations may be on board."

If it is not in you op lims and you wish it, you may have your op lims amended to the current revision.

PLEASE read the AC closely. It is NOT a simple way to take a friend along or take flight training of any kind!

The AC only allows the second pilot program for kit aircraft - not scratch-built, auto-engined or new design - only.

So the new limitation is added to all operating Limitations regardless? The FAA/DAR doesn't check validity?

[bill v]

does someone have a shroud to go over the engine and a cut down prop to break the engine on the ground? I'm sure more people do this then just our local AP/AI

[sblack]

Originally Posted by bill v

does someone have a shroud to go over the engine and a cut down prop to break the engine on the ground? I'm sure more people do this then just our local AP/AI

The engine needs to be run at high power and still get adequate cooling. The test prop would have to be carefully chosen to provide specific static loading.

[Mel]

Originally Posted by az_gila

The AC only allows the second pilot program for kit aircraft - not scratch-built, auto-engined or new design - only.

So the new limitation is added to all operating Limitations regardless? The FAA/DAR doesn't check validity?

And not ALL kit aircraft. The aircraft must be listed on the FAA approved kit list. Example: The RV-14 is not yet on the list. Therefore, at this point, the RV-14 doesn't qualify.

If your aircraft doesn't qualify, then you can't take advantage of the AC.

The new op lims are chocked full of things that don't apply to many aircraft.

[Kyle Boatright]

Originally Posted by sblack

The engine needs to be run at high power and still get adequate cooling. The test prop would have to be carefully chosen to provide specific static loading.

I've seen professional test cells with a plenum over the cylinders. The plenum was force fed air through the top from dedicated electric blowers.

It was a pretty robust set-up for cooling that might be hard to replicate with a prop.

[jrs14855]

This subject invariably results in more bad information than good. The Lycoming document calls for CHT's above 350, below 420. Red line CHT is totally unacceptable and will almost certainly glaze the cylinders requiring cylinder removal and honing at a MINIMUM.
In most cases the rings will seat in anywhere from 45 minutes to a few hours, depending on type of cylinder.
Also, seating the rings does not require full power. 75% or higher works just fine.
The protocol that I like best is that published by Mahlon Russell.

[Kent Ashton]

This break-in schedule from Mahlon is pretty good
http://www.vansairforce.com/communit...08&postcount=6