slick1537 Posted May 2, 2008 Report Share Posted May 2, 2008 What do you guys use for weight when computing weight and balance? How much does a gallon of 100LL weigh? Quote Link to comment Share on other sites More sharing options...
Gerhardt Posted May 2, 2008 Report Share Posted May 2, 2008 Six pounds per gallon. Quote Link to comment Share on other sites More sharing options...
BOATFIXERGUY Posted May 2, 2008 Report Share Posted May 2, 2008 Ditto. Quote Link to comment Share on other sites More sharing options...
PhotoFlyer Posted May 2, 2008 Report Share Posted May 2, 2008 PropertiesAvgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and this density is commonly used for weight and balance computation. Density increases to 6.40 lb/US gallon at -40 °C, and decreases by about 0.5% per 5 °C increase in temperature.[3] Avgas has an emission coefficient (or factor) of 18.355 pounds CO2 per US gallon,[4][5] or about 3.05 units of weight CO2 produced per unit weight of fuel used. I use (and teach) 6 lb/gal for flight planning. Quote Link to comment Share on other sites More sharing options...
lelebebbel Posted May 3, 2008 Report Share Posted May 3, 2008 6lb/gal for weight and balance. I have read different things about the actual weight though. AOPA recently wrote (in the magazine) that it is 5.7lb/gal at 20F or so, and 5.4lb/gal at 60F? I need to find the copy of the magazine to verify. Shell says it has a relative density of 0.71-0.74 at 15 deg C, which translates to 6.0 lb/US Gal. at 59F for all you imperialists http://www.shell.com/static/aviation-en/do...0_ll_s13001.pdf Quote Link to comment Share on other sites More sharing options...
Doug Burdick Posted April 26, 2020 Report Share Posted April 26, 2020 Been struggling with W and B on a 1985 Mooney. Charts use 6 lbs/U.S. Gal. In the text a few pages prior you will see that 6 is for 100/130 and for 100LL states "use 5.82 lbs/gal". This makes my problem worse as fuel arm is aft of cg. I guess I need to fill the stabilizer with lead to get this thing in cg"😊 Quote Link to comment Share on other sites More sharing options...
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