behindpropellers
Registered User
NE Ohio
Very interesting. Thanks, Steve.
Guess I will go out to the hanger and see which orifice I have.
Guess I will go out to the hanger and see which orifice I have.
Interesting discussion. It used to be that the larger orface gage was used on engines over 1000 cu in. I guess the Continental SI says to use it for bores over 5”. I wonder what caused FAA to change AC43.13-1b
I also have a call into Continental to verify the proper gauge in their opinion.
It is interesting because I was unaware of this until recently. The 43.13 use to list above 1000 cubic inches which the radials I use to work on fell in that category. I guess displacement doesn't matter but bore size does. Be interesting to see what Continental says.
Sent from my SM-N900V using SuperCub.Org mobile app
TCM does offer guidance in their SB03-3 in that they depict a E2A gauge which is a .040 orifice.
Got this from my friend at Continental this morning:
Below is a snip from the M-0 Standard Practices Manual. SB03-3 has been incorporated into this manual.
Ron Humphrey
Manager Product Support
Continental Motors
888.826.5465
I used LOP on the A36 with a 550 that I used to fly for work. The biggest issue I found was lag in the EGT gage. It had a JPI, and after a lot of trial and error, I found that when leaning, if you tried to lean to 25 degrees LOP, within a couple minutes you would be 75 - 100 degrees LOP and on the edge of detonation.
Slightly off topic, but did that put you at the edge of detonation or at the edge of ignitable air/fuel ratio?
I don’t think going leaner than LOP brings you into a detonation margin. I think you just have a mixture that’s too lean to ignite. I think the detonation margin is the red box/red fin area.
Slightly off topic, but did that put you at the edge of detonation or at the edge of ignitable air/fuel ratio?
I don’t think going leaner than LOP brings you into a detonation margin. I think you just have a mixture that’s too lean to ignite. I think the detonation margin is the red box/red fin area.
Either detonation or pre-ignition, still running but definite roughness and CHT climbing.
Sent from my iPhone using Tapatalk
........Using the E-2M1000 with the .060" orifice I got 78/80 without having to mess with the prop. Immediately installed the E-2A with .040" orifice and it showed 64/80 at the same prop position. .....