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  #1  
Old 11-13-2022, 05:02 PM
my53cad my53cad is offline
 
Join Date: Sep 2022
Location: KUTS
Posts: 6
Default Fuel tank size

Does anyone know if Van's ever offered a 17 gallon fuel tank for the RV-9A. Just bought an RV-9A and builder swears it has 17 gallon fuel tanks but I have only seen the 18 gallon tanks.
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  #2  
Old 11-13-2022, 05:12 PM
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Mike S Mike S is offline
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 16,604
Default Welcome to VAF

Ron, welcome aboard the good ship VAF

I wounder if he was talking about usable fuel?
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

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Sold after 240+ wonderful hours of flight.

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  #3  
Old 11-13-2022, 07:06 PM
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Vlad Vlad is offline
 
Join Date: Oct 2008
Location: Utah
Posts: 8,652
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Stock tank is 18 gallons. Maybe he adjusted his tank fuel pickup tube to make 1 gallon unusable.
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  #4  
Old 11-15-2022, 05:52 PM
my53cad my53cad is offline
 
Join Date: Sep 2022
Location: KUTS
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Default

Previous owner swears he installed 17 gallon tanks when built in 2007. All I have ever heard of is the 18 gallon tanks. Guess I will have to drain them and refill them to be positive. Thanks
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  #5  
Old 11-15-2022, 11:07 PM
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9GT 9GT is offline
 
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Location: Southern Michigan
Posts: 2,310
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Well, in all probability they are the standard 18 gallon tanks. That being said, I modified mine to 21 gallon tanks.
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David C.
Howell, MI
RV-10: #41686 Under Construction/Sold 2021
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2023
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  #6  
Old 11-16-2022, 09:01 AM
BEAU4277 BEAU4277 is offline
 
Join Date: Feb 2022
Location: Lakeland
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Quote:
Originally Posted by 9GT View Post
Well, in all probability they are the standard 18 gallon tanks. That being said, I modified mine to 21 gallon tanks.

I am very interested in how you made that modification!
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  #7  
Old 11-16-2022, 10:56 AM
jclark jclark is offline
 
Join Date: Jan 2005
Location: Columbia, SC
Posts: 990
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Quote:
Originally Posted by BEAU4277 View Post
I am very interested in how you made that modification!
Not sure of his modification to get 3(x2) extra gallons but what you CAN do is install a 7-7.5 gallon tank directly behind the seat back protruding just a bit into the baggage compartment.

I know this works because I supplied Marvin (at the time) of Smoke Systems Helpers (I think that is the name) with the dimensions and fit tested them to 6/7/9 tip up and slider combinations.

I have 2 installed in my RV6 tip up.
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  #8  
Old 11-16-2022, 11:10 AM
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9GT 9GT is offline
 
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Location: Southern Michigan
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Quote:
Originally Posted by BEAU4277 View Post
I am very interested in how you made that modification!
I extended outboard a bay. Not an EZ process, especially for tanks already built like mine were. Somewhere in the bowels of this forum, I detailed the process along with photos,,,maybe 3 or so years ago. Not for the faint of heart.
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David C.
Howell, MI
RV-10: #41686 Under Construction/Sold 2021
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2023
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  #9  
Old 11-16-2022, 11:32 AM
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bruceh bruceh is offline
 
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,702
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Calibrating my tanks, they held something like 18.1 gallons and my unusable fuel was literally a few ounces.
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  #10  
Old 11-16-2022, 11:33 AM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,999
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Check out what Sky Designs offers for the RV10 & 14
https://www.skydesigns.aero/products

For the RV9, you would have to fabricate your own extended tank skins, rear baffles, mounting hardware & shorten the outboard leading edge skins.
Customization - a nasty word for some...
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built a few RVs, rebuilt a few more, hot rodded more, & maintained/updated a big bunch more
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