falcon5

Got a gee wiz question for you guys. I live in central Nevada and fly at two differant flying sites with an elevation differance of about 4000 feet. If my engine is tuned for the higher elevation field and then I go to the lower elevation field and the needles were not touched, would the engine run leaner or richer???

Thanks

Andy

smokingcrater

dropping in elevation makes air denser, so more air = leaner mixture. temperature has the same effect. if it is suddenly 60 degrees cooler, the air is denser, so your mixture without touching it will be leaner then before. the fun part is that those two are generally inverses of each other, as you drop in altitude you gain temp.

w8ye

My Feedback: (16)

Relative humidity gets involved there somewhere too?

But I suppose you guys out west never consider humidity 'cause there ain't none like it is here in the east?

Higher relative humidity = greater density altitude?

It's been too many years, I cannot remember how to figure D.A.?

Use this calculator to determine the equivalent altitude? http://wahiduddin.net/calc/calc_da_rh.htm

Enjoy,

Jim

falcon5

Cool, Thanks

Cyclic Hardover

My Feedback: (3)

I fly at 5000ft. Since you bounce back and forth, just re-adjust it. Takes only a couple minutes. That way your covered. Plus you need to add in the DA which could add a couple thousand more feet to it. On an average summer day here, were up around 7-8000ft total including the DA.