Sender: "Marvin Kaye" <marv@lancaironline.net>
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Date: Mon, 14 Mar 2005 09:14:57 -0500
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From: "Jeffrey Liegner, MD" <liegner@earthlink.net>
Subject: RE: [LML] Re: Walter - Target EGT query
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1000nm at 230 kts (GS) is 4.35 hours duration.
1000nm at 195 kts (GS) is 5.13 hours duration.

"Aggressive" leaning adds 47 min, versus (estimated) 60 min to land, 
fuel, potty, return to flying.

Don't forget the benefits of a mid-trip potty break.

Jeff L


>hypothetical scenario with estimated values:
>
>Flying at 15000' going east, WOT, 2400 RPM, 14.5-15.5 GPH, 220 to 
>230 kts ground speed with 30 kt tailwind; EGT @ 1260, CHT @330. 
> Fuel computer says 900 nm of gas left, 1000 nm to go, takes about 
>1hr to land, fuel, and get back up in the air.
>
>To make the trip without landing, lower RPM to 2100, begin 
>aggressive leaning, engine sputters @ 9 GPH, enrich to 10 GPH, EGT's 
>go up to 1300, CHT's to 350, GS ~ 190-195 kts with same tailwind. 
>Now fuel computer says 1200 nm left, 1000 to go, have fuel margin 
>and do not have to land.