Cotton Waiex 191 - N191YX

[Bryan Cotton]

Here is how I am attaching the drain line to the fuel catch. First I made a 90 degree dimpler, which is what I measured my automotive brake flare kit as. That is the bolt shank on the right side that has been shaped into a cone. There is a matching dimple on the piece of oak. I use my drill press as the dimpler. Moving left, the yellow alodined piece is my pattern. Next piece moving left is scrap with a dimple in the middle, and 3 screw holes around it. Again moving left there is a short piece of 3/16" tube with a flare on it. This flare mates to the dimple. The tube is on a piece of 1/8" thick 6061-T6 with a countersunk hole surrounded by three 8-32 threaded holes.

Here it is assembled. Sort of a low pressure brake line fitting.

Here is the leak and flow test. Seems good.

[Bryan Cotton]

Here is the backside of my drain fitting.

Here is my drain line routing.

Note one of the screws is a different color. That is because I dropped one down the tank.

The two sided reflection of the screws is cool.

[Darick]

What kind of sealant will you be using?

[Bryan Cotton]

Whatever is in the cabinet that I can get out of the tube. I figure it does not have to hold any fluid for longer than it takes to drain out.

[Rynoth]

Your solution looks a lot less primitive than my solution of stuffing shop rags in around the filler neck.

http://www.rynoth.com/wordpress/wp-cont ... x-2771.jpg

[Bryan Cotton]

Ryan,
I bet your rags took less than 20 man-hours to complete!

Here are my clips for the drain line riveted in.

The bigger the blob, the better the job. I used red RTV because 1) it was open, 2) it hadn't hardened yet, and 3) it matched the blood from various cuts and a nosebleed I suffered today. The white thing is a piece of Teflon wire, sprayed with WD40 and jammed into the tube to keep the RTV out of it. I used the same piece of wire to bend the tube.

Adam riveting in the tank angles:

Tank bolted in. This sucker is done. Not counting the aches and pains from contorting myself under the tank cover it feels pretty good!

[Darick]

Bryan, Adam looks to be as big as you! What a history you have created here in this photo album! He will look back on this adventure with HIS kids and be so proud of his father. MERRY CHRISTMAS!!!

[Bryan Cotton]

Darick,
He has been taller than me for over a year.

Here is my final drain test:

[Bryan Cotton]

No pictures, but we got a few things done today. Early this morning I installed Peter's excellent tailwheel steering pushrod. This afternoon Adam got the seatbelts installed and I worked on the mixer access panel.

There was some horror in my day too. The tailcone bottom skin is not polished yet. Hope I have enough F9.

[Sonex1517]

If you don’t have any, let me know. I have some in the hangar at ARR and can find a way to get them up there.