On Wed, 5 Mar 2003 21:33:35 -0500, David Megginson <[EMAIL PROTECTED]> wrote in message <[EMAIL PROTECTED]>:
> Arnt Karlsen writes: > > > ..heh, and you the emacs'er balance that by running lean-of-peak? > > ;-) > > I am afraid that I do no understand your insinuation. If I'm on the > side of the angels with one, should I not be on their side with both? .. ;-) > > ..how far back can you drag it before it starts running rough? > > Without carb heat, I can lean back to between 65% and 75% power, > depending on the day and how long the engine has been running. With > carb heat on in cruise, I can pull it back much farther, probably > right to cutoff if I were so inclined. > > The nice thing is that I have my Piper POH for backup: > > For Best Economy cruise, a simplified leaning procedure which > consistently allows accurate achievement of best engine efficiency > has been developed. Best Economy Cruise performance is obtained with > the throttle fully open. To obtain a desired cruise power setting, > set the throttle and mixture control full forward, taking care not > to exceed the engine speed limitation, then begin leaning the > mixture. The RPM will increase slightly but will then begin to > decrease. Continue leaning until the desired cruise engine RPM is > reached. This will provide best fuel economy and maximum miles per > gallon for a given power setting. > > It's easy to do this with a fixed-pitch prop, since the tach gives a > direct indication of power setting at any given density altitude. ..I should have asked: how far back/down of peak temp? Carb heat helps you down the temperatures on leaning way back, how far down? -- ..med vennlig hilsen = with Kind Regards from Arnt... ;-) ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
