13brv3
Well Known Member
Greetings,
I've been working toward setting the idle mixture on my O-360, and I have a question about the exact procedure.
According to the manual "...move the cockpit mixture control lever with a smooth steady pull toward idle cut-off..." My question is how long should this "smooth steady" motion take?
If I pull the lever at a rate of 3-5 second from rich to cutoff, I get about a 50 rpm increase near the lean end. If I pull it much slower, or hunt for the spot with max rpm, then I get maybe 150 rpm increase. Is it right the way it is, or am I way too rich still
FWIW, I haven't spent much time messing with this because it's a new engine, and I need to put some hours on it before spending too much time with ground runs like this. Mostly, I'm checking it every time I shut down the engine from a test run.
Thanks,
Rusty (receive airworthiness certificate today, first flight is imminent)
I've been working toward setting the idle mixture on my O-360, and I have a question about the exact procedure.
According to the manual "...move the cockpit mixture control lever with a smooth steady pull toward idle cut-off..." My question is how long should this "smooth steady" motion take?
If I pull the lever at a rate of 3-5 second from rich to cutoff, I get about a 50 rpm increase near the lean end. If I pull it much slower, or hunt for the spot with max rpm, then I get maybe 150 rpm increase. Is it right the way it is, or am I way too rich still
FWIW, I haven't spent much time messing with this because it's a new engine, and I need to put some hours on it before spending too much time with ground runs like this. Mostly, I'm checking it every time I shut down the engine from a test run.
Thanks,
Rusty (receive airworthiness certificate today, first flight is imminent)