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dogstar4000
08-06-2005, 12:35 PM
Anyone know the most econimical engine settings for the 109 4/b and 7/b?

Atomic_Marten
08-06-2005, 01:10 PM
I can't tell you exactly; but I around 65% throttle should do it. That should be -- your cruise speed. Prop.pitch of course auto. So for 109 engine settings are quite simple -- you don't have to bother with prop. pitch, superchargers or mixture.

ClnlSandersLite
08-07-2005, 12:22 AM
Atomic_Marten: There is a VERY large difference between economy cruise and high speed cruise. I'm not positive about the 109 but, I imagine it's in the neighborhood of 30-40% throttle, 15-20k feet. This is max fuek effeciency we're talking about here.

This kind of thing is basically what you need, but I'm not sure where to find one for the 109s. http://www.zenoswarbirdvideos.com/Images/P-38/38FOIC.gif

Atomic_Marten
08-07-2005, 04:59 PM
Originally posted by ClnlSandersLite:
Atomic_Marten: There is a VERY large difference between economy cruise and high speed cruise. I'm not positive about the 109 but, I imagine it's in the neighborhood of 30-40% throttle, 15-20k feet. This is max fuek effeciency we're talking about here.

This kind of thing is basically what you need, but I'm not sure where to find one for the 109s. http://www.zenoswarbirdvideos.com/Images/P-38/38FOIC.gif

Well, you don't say... http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

I can learn something new every day. http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif


This is max fuel effeciency we're talking about here.

BTW did you mean max. distance covered with that fuel capacity, or...?

Tully__
08-07-2005, 11:13 PM
BTW did you mean max. distance covered with that fuel capacity, or...?
Economy cruise is best miles per gallon. The actual speed in real life is very sensitive to windspeed & direction. Working it out requires a vector comparison of ground speed versus airspeed versus fuel consumption (gallons per hour) @ airspeed. The maths isn't that hard though if you're comfortable with 2D vector calculations.

Atomic_Marten
08-08-2005, 02:52 AM
Thanks for answer.