Join Date: Aug 2011
Location: Westminster Maryland
In theory, Air/fuel mixture should be the same at any altitude.
My take on the air/fuel mixture, knowing we're ECU controlled, electronic fuel injection, and in a perfect world, changing from near sea level to less than 4000 above sea level should not be an issue with power on any modern engine. Pilot's use a mixture control for peak EGT on a gauge, for keeping the engine happy while flying at all altitudes.
So my idea would be the power output curve should stay close to the same on a properly setup engine. Also keeping things in order here, our light General avaition aircraft are using 30's technology with the engines, Magneto's, dual plugs per cylinder, manual throttle bodies (fuel injected) or carbs, manual mixture controls and commonly fly from sea level to 12k.
I hope this don't confuse the issue here.
EGT is Exhaust gas temp.
OH and the idea of making our monster engines go rich for cooling and protection at near the max designed output is a valid point. The engineers knowing how we tweak and modify our engines, I'm sure there are some limits in there somewhere.
I did find my RPM limit in 4th last week, didn't realize how different the bike sounds when I'm wearing my full face helmet and balaclava. OOPs. can't go there. I am planning on using my helmet cam to watch my GPS for real speed measures as I don't want to be looking down so far with a full face helmet blocking my view of the speed indicator. I'll post it oneday. I already know my speedo is off a few miles. Mine reads about 4MPH faster than the GPS so it's protecting me in the long run.
Just for info and fun, our aircraft engines are air cooled, most are 4/6/8 opposed cylinders, and designed for 1/2 HP per Cubic inch.
All typical Lycomings and Continental use two plugs per cylinder for redundant ignition, they all have dual magneto's. And can run on one as designed in the years 20-30's. No DC power required other than for the starter.
07 Stratoliner S with MS Batwing, MS lowers, Buck lowers, custom large trunk rack, King tourpack trunk, air horn, See me Now tail light and headlight pulser mods. Led lighting all over. Night rider tail light setup on the trunk.
Last edited by dcody40; 01-03-2012 at 04:24 PM.