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01-15-2011, 05:16 PM
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Join Date: Sep 2006
Location: Townsend, Montana
Posts: 3,179
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That is a strange deal. you're 35# heavier than mine and 70% of that weight is on the tail. 
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Retired Dam guy. Life is good.
Brian, N155BKsold but bought back.
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01-15-2011, 05:19 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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I suspect something amiss on the scales....
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01-15-2011, 05:21 PM
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Join Date: Sep 2006
Location: Townsend, Montana
Posts: 3,179
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Quote:
Originally Posted by Brantel
I suspect something amiss on the scales....
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That'd be the thing I check
__________________
Retired Dam guy. Life is good.
Brian, N155BKsold but bought back.
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01-15-2011, 05:26 PM
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Join Date: Feb 2007
Location: San Diego, CA
Posts: 1,670
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Tare
You're not inadvertently weighing the blocks holding the tail up, by any chance? Zero the scale after adding the blocks.
Just thinkin' out loud..................  Not that I would ever do anything like that. Or mismeasure by exactly 10"............. 
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Pete Hunt, [San Diego] VAF #1069
RV-6, RV-6A, T-6G
ATP, CFII, A&P
2020 Donation+, Gladly Sent
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01-15-2011, 06:56 PM
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Join Date: Mar 2005
Location: Chandler, Arizona
Posts: 188
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tail heavy
OK, So I set it up and weighed it again... perfect 0.0 level, the tailwheel is the only thing on the aft scale on top of a benchT tried different scale (bathroom target scale) and also read 92# on it... I even weighed myself on each scale to see the same correct number show up each time... The only thing I can think of is for some reason something is different placing the wheels farther forward than normal or something that would change the measuring points. If the main wheels were just a couple inches aft it would have a big difference in the weight distribution... Is there any way I have gear legs or an engine mount that would change this... I guess in the morning I am going to have to start dropping plumb lines and find the actual datum and where the wheels fall into all this mess. 20# is a huge difference. My RV-8 was 56# on the tail. For me to offset this I would have to add #45 or so to the spinner.... Anyhow thoughts again???
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01-15-2011, 07:34 PM
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Join Date: Sep 2006
Location: Townsend, Montana
Posts: 3,179
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have you recently lost your dog?
but yes next step is get some measurements.
__________________
Retired Dam guy. Life is good.
Brian, N155BKsold but bought back.
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01-15-2011, 08:03 PM
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Join Date: Jan 2011
Location: Los Angeles
Posts: 90
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Where is Dan C's website?
I'm having problems with my RV6 CG and someone mentioned Dan C's web-site for examples. Can anyone tell me who he is and where his website is?
Thanks
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01-15-2011, 08:07 PM
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Join Date: Oct 2008
Location: Arlington, WA
Posts: 799
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Dan C's website was taken down by Dan about two years ago.
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_______________________________
Scott "Grumpy" Stewart
RV-7 N957RV (First Flight on Dec 18, 2009 )
RV-14 N144P (Empennage complete, wings almost complete, fuselage almost complete)
#866 on the Van's RV-7 hobbs
#6563 on Van's generic hobbs
Arlington, WA
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01-15-2011, 08:10 PM
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Join Date: Mar 2005
Location: Chandler, Arizona
Posts: 188
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**** heavy tail
OK, so I can't leave things alone... Went out and we leveled the plane again, droped lines measured Datums, and the wheels are right where they should be for doing the weight and balance. Everything seems to be where it should be... I am flustered because I have finished 3 RV's and never have I seen a tail this heavy...
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01-15-2011, 08:21 PM
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Join Date: Oct 2008
Location: Arlington, WA
Posts: 799
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I have a W & B spreadsheet already set up for the RV-7 (includes arm distances based on Van's specs). It gives a picture/graph to show if your weight/balance is ok for Normal/Utility/Aerobatic category of flight at take-off and landing weight. You should be able to plug in weights for each wheel and get correct results - as long as your wheels are all where they belong!
Send me your email if you want the file.

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_______________________________
Scott "Grumpy" Stewart
RV-7 N957RV (First Flight on Dec 18, 2009 )
RV-14 N144P (Empennage complete, wings almost complete, fuselage almost complete)
#866 on the Van's RV-7 hobbs
#6563 on Van's generic hobbs
Arlington, WA
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