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Wegith and Balance

 
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jim(at)CombsFive.Com
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PostPosted: Sun Oct 26, 2008 3:49 pm    Post subject: Wegith and Balance Reply with quote

I finally get around to getting an official weight and balance for my airplane. But it has lead to a few questions.(1) I find in surprising that vans RV-10 sample WB pdf does not have arms for the nose wheel and the mains. Do they expect those to be different from one builder to another? I could not find any spreadsheets from other builders showing what their moment arms were. Yes I know I am supposed to measure this but I want to compare my results to some others. My Nose wheel arm ended up being 50.125" forward of the leading edge (99.440 based on Vans numbers) which makes my nose wheel arm 49.315. My mains are back 24" from the wing LE making my mains arm 123.440". What did others measure?(2) So now I weigh the airplane (using certified scales) and I find the empty CG way forward (102.46"). I expected the forward CG but not quite that much. Even with me as the sole occupant and half fuel, I need to have 100 lbs in the baggage area just to get the CG back to the most forward allowable (107.84"). Now I played with the numbers and it does allow one to really load up the airplane for maximum capabilities, but wow I didn't expect to have to load up the baggage area on the first flights. Did others find the same conditions?If one were to take off on the first flight and not check the CG, it woudl make for an interesting landing! Looks like carrying passengers on the flights is not only good but maybe even required unless I want to carry around some extra weight (couple of 5 gallon water containers).Very interesting!Jim CombsN312F, 40192 [quote][b]

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rene(at)felker.com
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PostPosted: Tue Oct 28, 2008 7:13 pm    Post subject: Wegith and Balance Reply with quote

Based on a request from John Acherman, here is my WB Spreadsheet. Use at your own risk. J



Rene'
801-721-6080


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WB_Worksheet_20_July_08.xls
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