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  #1  
Old 08-22-2017, 10:53 AM
Cth6 Cth6 is offline
 
Join Date: Apr 2017
Location: Central Florida
Posts: 50
Default RV-12 W&B

Looking at a flying RV-12, D-180 with all the options circa 2010. The Empty Arm seems extremely far aft. 764# @ 83.77". The arm for the nose wheel is 32.25" and the mains are 93.75"

We are almost 1" aft CG with my wife and I with full fuel and 50 lbs of baggage and still 100# under gross. If I want to fly solo I need to be down to 13 gallons with 5# of baggage.

Has anyone updated their Arm in the CG calcs for moving the seat forward? The benefit of being a short.
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  #2  
Old 08-22-2017, 11:41 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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If you are serious, consider having the airplane reweighed and the W&B recalculated.
Unless there is something quite non standard about this particular RV-12, what you are seeing is not typical.
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  #3  
Old 08-22-2017, 11:53 AM
Mich48041 Mich48041 is offline
 
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Location: Riley TWP MI
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The arm for your nose wheel is 2 inches aft of mine, which is 30.25
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  #4  
Old 08-22-2017, 12:04 PM
Mich48041 Mich48041 is offline
 
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Download THIS Excel spreadsheet and enter your weights into the yellow cells. Make changes to the yellow cells ONLY.
HERE is a link to a previous weight and balance thread. Read my post #15 in that thread.
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Last edited by Mich48041 : 08-22-2017 at 12:10 PM.
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  #5  
Old 08-22-2017, 12:53 PM
Cth6 Cth6 is offline
 
Join Date: Apr 2017
Location: Central Florida
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Quote:
Originally Posted by Mich48041 View Post
Download THIS Excel spreadsheet and enter your weights into the yellow cells. Make changes to the yellow cells ONLY.
HERE is a link to a previous weight and balance thread. Read my post #15 in that thread.
I believe you have an error in your spreadsheet. Empty weight on the Weight and Balance tab is fixed and I believe it should be the sum of the three weights above it.

Good news, after making the cell update, it supports my calcs. BTW, great job on the spreadsheet. Much nicer that what I pulled together.
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Last edited by Cth6 : 08-22-2017 at 01:07 PM.
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  #6  
Old 08-22-2017, 01:03 PM
Cth6 Cth6 is offline
 
Join Date: Apr 2017
Location: Central Florida
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Quote:
Originally Posted by rvbuilder2002 View Post
If you are serious, consider having the airplane reweighed and the W&B recalculated.
Unless there is something quite non standard about this particular RV-12, what you are seeing is not typical.
Really nothing that I have seen is non-standard. No, I have not pulled access covers yet but nothing sticks out. Still haven't had the pre-buy yet.

Definitely will get it done in the pre-buy.
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  #7  
Old 08-22-2017, 04:23 PM
Mich48041 Mich48041 is offline
 
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I can not take credit for the spreadsheet. I believe that Walter Tondu made it for his RV-7A. I did modify it for the RV-12. If you have not already, change cell B8 to "=sum(B5+B6+B7)" without the quotes.
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  #8  
Old 08-22-2017, 08:51 PM
Cth6 Cth6 is offline
 
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Location: Central Florida
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Quote:
Originally Posted by Mich48041 View Post
I can not take credit for the spreadsheet. I believe that Walter Tondu made it for his RV-7A. I did modify it for the RV-12. If you have not already, change cell B8 to "=sum(B5+B6+B7)" without the quotes.
Exactly what I did. Thanks for sharing it.
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