RV8-List Digest Archive

Sat 04/13/13


Total Messages Posted: 3



Today's Message Index:
----------------------
 
     1. 02:23 PM - fuel vent lines ()
     2. 02:59 PM - Re: fuel vent lines (Stein Bruch)
     3. 10:27 PM - Re: fuel vent lines (C. Dan Miller)
 
 
 


Message 1


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    Time: 02:23:09 PM PST US
    From: <stazel@cpros.com>
    Subject: fuel vent lines
    Seems to me the fuel vent line design leaves a lot to be desired when it comes to installation and maintenance. In researching problems/solutions with these, I came across references to the coiled lines used on the F1 Rocket and (I believe) the RV10. They seem to work fine and I am leaning that direction, but I do not have as much info as I feel I need to be comfortable incorporating this mod. Since I am doing a QB, my plan would be to run a short L-shaped tube between each existing belly vent line hole pair and bulkhead fitting (using what is already there) and coupling up the the coil to that fitting. It would then be easy to remove the short lines inside the gear towers to avoid possible inadvertent damage which could occur when retorquing the landing gear bolts or any other maintenance/servicing inside the towers. The only fab concern I have will be to make sure the new vent line routing will not interfere with the brake lines, but I see that as a minor issue easily dealt with. Guess I=99m looking for a confidence builder here. Any and all feedback gratefully received. Photos if possible. Stan Loer RV-8 (Very slow) QB


    Message 2


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    Time: 02:59:27 PM PST US
    From: "Stein Bruch" <stein@steinair.com>
    Subject: fuel vent lines
    My humble suggestion would be to do it as designed. I am not aware of any glaring issues with the standard installation over the many thousands of RV=99s flying with the vent lines installed that way, nor in any of them I=99ve built/own/flown in the past number of decades. As soon as you start changing things for no good reason, you become a test pilot, test engineer, and also could create other unforeseen consequences. There are people who=99ve done it differently and changed fuel systems, but none can point to any conclusive benefit nor reasoning for doing so, other than their desire to do so (or someone=99s idea of what =9Cmight=9D be better). The fact is that the standard Van=99s way of doing things usually ends up being the best. No reason to create a solution to a problem that doesn=99t exist, nor to expend much energy and time researching said solution to the problem that doesn=99t exist when that time could be best spent working on the plane. My opinion for confidence building is to follow the plans and =9Cgit =98er done=9D! J Just my 2 cents as usual. Cheers, Stein From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of stazel@cpros.com Sent: Saturday, April 13, 2013 4:23 PM Subject: RV8-List: fuel vent lines Seems to me the fuel vent line design leaves a lot to be desired when it comes to installation and maintenance. In researching problems/solutions with these, I came across references to the coiled lines used on the F1 Rocket and (I believe) the RV10. They seem to work fine and I am leaning that direction, but I do not have as much info as I feel I need to be comfortable incorporating this mod. Since I am doing a QB, my plan would be to run a short L-shaped tube between each existing belly vent line hole pair and bulkhead fitting (using what is already there) and coupling up the the coil to that fitting. It would then be easy to remove the short lines inside the gear towers to avoid possible inadvertent damage which could occur when retorquing the landing gear bolts or any other maintenance/servicing inside the towers. The only fab concern I have will be to make sure the new vent line routing will not interfere with the brake lines, but I see that as a minor issue easily dealt with. Guess I=99m looking for a confidence builder here. Any and all feedback gratefully received. Photos if possible. Stan Loer RV-8 (Very slow) QB


    Message 3


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    Time: 10:27:00 PM PST US
    Subject: Re: fuel vent lines
    From: "C. Dan Miller" <cdmiller131@hotmail.com>
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