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  #1  
Old 03-14-2019, 07:17 AM
JwWright57 JwWright57 is offline
 
Join Date: Dec 2016
Location: Charlotte, NC
Posts: 126
Default 12iS fuel tank gotchas

Hi all - i'm getting ready to proseal the 12iS fuel tank, are there any tips/tricks to getting this right the first time?
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Jeff Wright, Charlotte NC
Rv-12 started!
Tail 99% done
Wings 99% done
12IS fuse kit 99% done
Finish kit coming in a few weeks
Dues paid 2019
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  #2  
Old 03-14-2019, 09:32 PM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 815
Default

Since I built my RV-12 "classic" fuel tank some six years ago I am afraid I can't comment on the specifics of your RV-12 iS tank. However, here are a few thoughts from my experience building my tank and others:

-- Don't rush it. Try to be neat. Use lots of nitrile gloves, spreading sticks, and masking tape.
-- Use cake decorating bags or plastic storage bags for long even runs of sealant. Large syringes found at animal supply stores work well too.
-- Mix up and use small batches of sealant. I used a lot of those small plastic flat-bottomed condiment cups found at fast food joints.
-- Do not think that globbing on more sealant is better. Before you start, think about how the fuel might leak through the joint or seam and spread your sealant accordingly and carefully. Its a Zen kinda thing -- "Be the Fuel...".
-- There is a lot of information on the VAF site concerning generic RV tank sealing techniques. I made my tank as a series of sub-assemblies over a period of 2-3 days. I found that new sealant successfully adhered to the still-curing day-old sealant.
-- Don't worry about the bit of sealant that gets on the end of your clecos. When I removed a dirty used cleco I threw it in a container of MEK (or whatever solvent you use) and later wiped off the bit of sealant at my leisure.

I actually enjoyed building my tank. Nary a leak after 740+ hours (Knock on wood). Just be glad that we don't have to buck AN rivets on our RV-12 tanks -- that can be messy!
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David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 800+ hours (as of Aug 2019)!
VAF donation through June 2020.
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  #3  
Old 03-15-2019, 12:02 PM
JwWright57 JwWright57 is offline
 
Join Date: Dec 2016
Location: Charlotte, NC
Posts: 126
Default

Thx David, sage advice
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Jeff Wright, Charlotte NC
Rv-12 started!
Tail 99% done
Wings 99% done
12IS fuse kit 99% done
Finish kit coming in a few weeks
Dues paid 2019
Reply With Quote
  #4  
Old 03-18-2019, 09:35 AM
664781 664781 is online now
 
Join Date: Jan 2005
Location: Powder Springs, Ga
Posts: 294
Default Fuel Tank Sealing

Scotch Brite all sealing surfaces first and keep every thing clean, clean, clean before applying sealant!
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Kurt Lohmueller A&P, DAR
Powder Springs, Ga
RV6A "Kurt's Toy" - Flying
RV12 - Flying - Sold
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