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#9
May 20th 04, 05:08 PM
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Walt wrote:
BTW, on the deck 760 mph is close to .1M (STP), so when your car is showing 76 mph, you're buzzing along at about .1M. (For interstate travel, 75 mph is 12.5 miles in 10 minutes . . . we just completed about 6000 miles of driving where I used this sort of mental T=D/R to predict ETAs thus boggling my better half. Same sort of calcs can be used ina light plane such as C152 . . . 6gph = 1 gal in 10 min, 90KTS = 1.5 nm/min; 120(tailwind)=2 nm/min. As above, use the calculator if things look tight. (If they do you've screwed up.) Glad I am not the only one running continuous ETAS while cruising down the Interstate :-) Drift gets to be a bitch though! Habit! Ingrained by instructors who are really old farts now! Rick Clark MFE 
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