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  #1  
Old 07-18-2018, 12:56 PM
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LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
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Default Fuel line vs. Flaperon mixture arm

Apparently, there is a missing step in the RV-12iS instructions. You have to countersink or enlarge the holes on the three plastic "holders" for the fuel lines through the main channel. Otherwise you get this.



Pulling those lines out to be able to get the plastic doohickeys off the large "studs" is going to make my day. But that's the way it goes.

Even if I do that, however, that looks like a REAAAALLLLLLY small clearance between the filter bypass line and the flaperon mixture arm.

Is there anything else I'm missing here?
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Almost ready to start the RV-12iS finishing kit. 480 hours in.

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Last edited by LettersFromFlyoverCountry : 07-18-2018 at 12:59 PM.
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  #2  
Old 07-18-2018, 10:03 PM
RFSchaller RFSchaller is offline
 
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Is this a change? I donít remember this issue when I was building in 2011.
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  #3  
Old 07-18-2018, 10:36 PM
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He's building a 12iS, it's got way different plumbing.
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Fisher Celebrity (under construction)
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  #4  
Old 07-19-2018, 06:45 AM
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LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
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Yeah, the tank is now directly behind the seats. The fuel line and return line come out of the tank bottom center, the lines go aft through the channel back to a shutoff and the fuel pump which sit on the baggage bulkhead wall, then exit back down the channel to a manifold near the firewall.

That instruction they left ouf of the plans, though, turnout out to be mportant. You have to take either a #19 countersink cutter or a step drill to the holes that attach the bottom half of the mylar block (fancy, we used to use sytrofoam back in the RV-7A building days) so that it fits OVER the nuts that hold the small bolts that act as studs for the blocks. Otherwise it raises the lines just high enough to hit the flaperon mixture arm.

As it turns out, It wasn't bad getting them off the studs in order to accomplish this.

Really, the incredible part about this kit is that if something doesn't fit right, you KNOW it's time to stop and figure out what you did wrong, because the design is perfect.
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St. Paul, MN.
Blog: Letters From Flyover Country
Almost ready to start the RV-12iS finishing kit. 480 hours in.

Builder log
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  #5  
Old 07-19-2018, 09:50 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by LettersFromFlyoverCountry View Post
Apparently, there is a missing step in the RV-12iS instructions. You have to countersink or enlarge the holes on the three plastic "holders" for the fuel lines through the main channel.
Step 1 on page 27iS/U-03 (Rev. 1) says "Final drill 5/16", the holes in three of the F-01276C-1'S"
This makes them over sized to fit over the nuts on the studs.
With all of the parts installed correctly, the fuel return line is positioned below the mixer bellcrank arm, close to the belly skin.

I think (Rev. 1)is part of a Revision that will be posted the first of next week. The revision will also include a couple of other minor changes, one of which will be related to a part change that is shipping out to all who have fuselage kits (related to installation of the fuel pump and filters so that shouldn't cause undoing any finished work for current builders)

BTW, your main feed line is not positioned in the aft block per the plans........
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Last edited by rvbuilder2002 : 07-19-2018 at 10:31 AM.
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  #6  
Old 07-20-2018, 03:57 PM
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LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
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Thanks, fixed.

I've been chatting with Jessica w.r.t. the new parts. I have to say I've been very impressed with Van's conscientiousness in rolling out the RV-12iS and the anticipated very design accommodations.
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Bob Collins
St. Paul, MN.
Blog: Letters From Flyover Country
Almost ready to start the RV-12iS finishing kit. 480 hours in.

Builder log
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  #7  
Old 07-20-2018, 10:35 PM
rv9builder rv9builder is offline
 
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Quote:
Originally Posted by LettersFromFlyoverCountry View Post
I have to say I've been very impressed with Van's conscientiousness in rolling out the RV-12iS
I agree. Jessica has been doing a great job of letting us know what's going on with new parts for the RV-12iS fuselage kit.
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