VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 07-31-2017, 07:06 AM
asw20c asw20c is offline
 
Join Date: Jun 2010
Location: Edgewood, NM
Posts: 76
Default Fuel Tank Priming

I am in the early stages of building the wings. This past weekend I FINALLY finished fluting the ribs and have just started the final drilling of the upper and lower rib flanges. Although the plans were vague in this regard, when they said to flute all the ribs, I fluted ALL of the ribs to include the leading edge ribs. After final drilling, deburring, and dimpling, I will be priming them. I don't recall reading anything about this in the primer-war threads, so is it appropriate to prime the ribs that make up the fuel tanks? I am using the same Sherwin-Williams product that Van's uses, and my line of thinking is that perhaps exposure to fuel is not what Sherwin-Williams had in mind for their product. I'm wondering if there might end up being some sort of fuel contamination problem.
__________________
Empennage Complete Except for Tips
Wings Underway
Reply With Quote
  #2  
Old 07-31-2017, 07:34 AM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Los Angeles
Posts: 320
Default Vans directions

I read in Vans instruction for the 9 to not prime the fuel tank ribs. I did prime the skin, inner and outer ribs that will be exposed to air external to the tank. I did this because the tanks may promote condensation and I wanted these surfaces primed.
__________________
Thank you
John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for thier use.

Extra dues paid 2017, worth every penny

RV9A- Status: tail feathers done less tips
Wings 50%
www.pilotjohnsrv9.blogspot.com
Reply With Quote
  #3  
Old 07-31-2017, 07:44 AM
N427EF N427EF is offline
 
Join Date: Oct 2005
Posts: 1,508
Default NO

DO NOT PRIME ANYTHING INSIDE THE FUEL TANKS!!!
__________________
Ernst Freitag
RV-8 finished (sold)
RV-10 Flyer 400 plus hours
Over 2500 Gallons of E10 mogas burned
Don't believe everything you know.
Reply With Quote
  #4  
Old 07-31-2017, 10:44 AM
control control is offline
 
Join Date: Feb 2006
Location: Stockholm, Sweden
Posts: 325
Default

Like above and if you do not listen to us, check the manual page 18-04 between step 5 and 6.
__________________
RV-14 kit #140138
working on the finish kit
wings, tail kit and fuselage basically done
Http://magnusrv.blogspot.se
Reply With Quote
  #5  
Old 07-31-2017, 02:05 PM
Polar Polar is offline
 
Join Date: Oct 2013
Location: Central Alberta
Posts: 61
Default While you're at it...

You should probably prime inside the engine cylinders too, just in case.
Reply With Quote
  #6  
Old 08-01-2017, 12:33 PM
asw20c asw20c is offline
 
Join Date: Jun 2010
Location: Edgewood, NM
Posts: 76
Default

Quote:
Originally Posted by Polar View Post
You should probably prime inside the engine cylinders too, just in case.
Yeah, that's a pretty snarky thing to say on this forum. I'm in section 12 of the plans so I don't have the benefit yet of any instructions regarding this question. Most folks here have been helpful when questions are posed by new builders since not everything is obvious.
__________________
Empennage Complete Except for Tips
Wings Underway
Reply With Quote
  #7  
Old 08-01-2017, 04:55 PM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,143
Default

Ah just ignore him. He was probably joking anyway. Don't prime the inside of your tanks. People used to use some sort of sloshing compound to seal tanks. You put it in the tank and rolled the tank around to make sure it got everywhere. Then a few years later it would start peeling off the tank in chunks and clogging filters. There is a service bulletin about that. As a result, most people would cringe at the idea of any sort of coating on the inside of the tank. Do a search on sloshing compound or similar and you will hear horror stories.

I would not recommend priming your cylinders either
__________________
Scott Black
RV 4, with an engine...and other stuff
VAF dues 2016
Reply With Quote
  #8  
Old 08-01-2017, 06:30 PM
Vlad's Avatar
Vlad Vlad is offline
 
Join Date: Oct 2008
Location: NJ
Posts: 7,087
Default

Quote:
Originally Posted by sblack View Post



I would not recommend priming your cylinders either

How would you start cold engine then?
__________________
Where is N666BK?

Не имей сто рублей, а имей сто друзей.
Reply With Quote
  #9  
Old 08-02-2017, 10:20 AM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,143
Default

Ha! Got me!

Actually on my current airplane I use the throttle to pump fuel in as I crank. I have no primer. Works great.
__________________
Scott Black
RV 4, with an engine...and other stuff
VAF dues 2016
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:48 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.