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on 11/04/03 9:35 PM, [EMAIL PROTECTED] at [EMAIL PROTECTED] wrote: > Needs some help > Does anyone happen to know the correct arm and moment for the Alon A2 header > tanks and the two wing tanks? Iam trying to setup the weight and balance in a > new flight planning program and the info that I have in my Owners Manual > doesn't make sense as it doesn't seperate the fuslege and the wing tanks. The > header tank is forward of the CG and the wing tanks are , I believe , behind > the CG . My OM lumps all tanks together (24 gal) rather then three entrys one > for each tank , which I believe gives an incorrect Weight & Balance result. > Any help would be aprecitated > Bob Bullock > N5621F > Maryland Yo, Bob The Weight and Balance form at the end of Ercoupe Service Memorandum #23 shows the fuselage tank fuel as weighing 30 lbs (5 gal. at six lbs./gal.) at an arm of 7 for a horizontal moment of 210. Fuel in each wing tank is individually shown as weighing 54 lbs at an arm of 25 for a horizontal moment of 1350. This memorandum came out while production coupes had ternplate tanks, but ERCO was calculating 9 gal. capacity wing tanks. I believe your nose tank is six gallons for 36 lbs and a horizontal moment of 252. In both forward and rearward C. G. calculations your header tank should be full and ERCO used a minimum wing tank fuel weight of 42 lbs. Later on, they used a combined minimum fuel of 12 gallons for such calculations. Any aircraft's weight and balance changes as fuel is burned. I agree you can't accurately calculate the minimum fuel C. G. lumping all together. Regards, WRB ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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