Mailing List flyrotary@lancaironline.net Message #63943
From: Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Tank vent lines
Date: Fri, 23 Mar 2018 11:32:44 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks Bobby.

Well, still building the tanks. So not a retrofit as such.

Thanks for the RV-10 tank plan you sent. Basically same as previous RVs except for finger fuel strainer/pickup sitting the the VA-141 flange.
So as Charlie pointed out, RV-10 is non-aerobatic which lessens the vent requirements.

Finn

On 3/23/2018 11:20 AM, Bobby J. Hughes bhughes@qnsi.net wrote:

Yep I don’t think this could be retrofitted in. The vent routes high through the ribs to the high end of the tank. I emailed you the tank plans directly.

 

Bobby

 

 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Friday, March 23, 2018 10:10 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Tank vent lines

 

Thanks Bobby.

I assume the RV-10 have dihedral wings like the RV-3, 4, 7, 8 ... ?

What I'm trying to understand is, with full tanks, how does fuel not get siphoned out the tank via the vent line (without the loop well up above the top of the tip of the tank inside the cockpit)?

With full tanks and then fuel expanding on a hot day.
Why would a loop like they use on the Rocket, be any better than the straight down on the RV-10?

(Oh, the RV-10 is nose wheel only? no tail-down attitude on ground -- so there will only be one high point in the tank except during climb-out where the is dynamic pressure into the outside vent line?)

Finn

On 3/23/2018 10:55 AM, Bobby J. Hughes bhughes@qnsi.net wrote:

Finn,

For the RV10 the vent line is installed through the bottom wing root fairing.   Bobby

 

mailbox:///C:/Documents%20and%20Settings/FinnL/Application%20Data/Thunderbird/Profiles/j5guhjem.default/Mail/incoming.verizon.com/Inbox.sbd/Flyrotary?number=246634371&header=quotebody&part=1.2&filename=image001.png

 

 

 

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Friday, March 23, 2018 9:41 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Tank vent lines

 

This looks very tempting.

 

http://www.vansairforce.com/community/showthread.php?t=1062

 

But can anyone explain the physics of it?

 

RV vent lines run from the upper tip of the tanks (next to filler hole) and then normally into cockpit, up cockpit wall, loops down to floor and into 90 degree fitting down through floor and pointing forward.

 

(http://www.vansairforce.com/community/showthread.php?t=1062&page=4)

 

There is a mention of RV-10 vent lines, that gives the idea they just come out of the tanks and down and out, but no pictures.

 

Finn

 

(Still figuring on where to put vent, transfer and return fittings in right tank)

 

 

 

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