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-----Original Message-----
From: Sydney Cohen [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 08, 2005 1:02 PM
To: Ed Burkhead
Cc: Coupe-List
Subject: Re: [COUPERS-FLYIN] Useful load----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----In order to get an accurate empty weight, the plane must be weighed on certified scales. According to my paperwork, my empty weight was 830 lbs. When we actually weighed the plane (after scraping out at least 5 lbs. of dirt and old oil from the belly) it weiged 932 lbs. Big difference! I talked to another FBO who had certified scales and he said it was very common for a plane to weigh around 100 lbs. higher than the paperwork weight.
Syd
Ed Burkhead wrote:
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Al,
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Please do all your calculations again with fuel = 6 lb./gal. Full fuel for my D was 24 gallons or 144 lb. but with that, I had gross weight of 1400 lb.
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Andrew,
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My empty weight was 895 lb. with a full panel of old, heavy instruments.
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Having an empty weight of 910 is high. Changing to rag wings brings you down to about 870 lb. empty for a useful load of 390 lb. If I remember right, a serial number in the 700 range had two eight gallon wing tanks and a 5 gallon header tank for total of 21 gallons or 126 lb.
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That leaves Andrew with:
metal wings: 1260 - 910 = 350 lb. useful load
350 – 126 fuel = 224 lb. for pilot, passenger and luggage
(subtract 6 lb. if one wing tank is 9 gallons)
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fabric wings: 1260 – 870 = 390 lb. useful load
390 – 126 fuel = 264 lb. for pilot, passenger and luggage
(ditto above)
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That plane may have left the factory much closer to 830 lb. with minimal instruments. Just guessing.
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Ed Burkhead
ed -at- edburkheadQQQ.com (change -at- and remove the QQQ)
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I know you believe you understand what you think I said, but I am not sure if you realize that what you heard is not what I meant. (Jim, AKA Midnight Plowboy)
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-----Original Message-----
From: A J DeMarzo [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 07, 2005 8:24 PM
To: [email protected]
Subject: Re: [COUPERS-FLYIN] Useful load<!--[if !supportEmptyParas]--> <!--[endif]-->
<!--[if !supportEmptyParas]--> <!--[endif]-->----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----<!--[if !supportEmptyParas]--> <!--[endif]--><!--[if !supportEmptyParas]--> <!--[endif]-->Okay, so with some extrapolation I'm guessing that you have a useful load of 1260 (about) which means the plane weighs 910. You should have weighed it empty, or subtracted your fuel load. Doesn't sound too bad until you figure that fuel is at 7 lbs per gallon, 24 gallons will be 168, so you need to be 182 lbs or less to be within the envelope. If you have the small tanks (8+8+5=21) you'll have 147 lbs of fuel so you can have that extra hamburger and still check in under 203. Add another person and you're way out.I hope you guys and gals can see why weight, or the lack of it, is so important on these airplanes. Metal wings, layers of paint, useless instruments and radios, thick heavy interior panels are all enemies of these flying machines. Next annual why not start your Ercoupe on a diet. Start getting rid of all that excess junk that is not needed or used.----- Original Message -----From: Andrew and Valarie SlackSent: Monday, March 07, 2005 7:50 PMSubject: [COUPERS-FLYIN] Useful load----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----List,Still looking at the "Coupe in the corner" and read the logs tonight. One thing that caught my eye is that the last time the aircraft was weighed it had a useful load of around 350lbs, is that typical of a "C" model with metalized wings and a C-85?. Or, is that a little heavier than most?.Andrew============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
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