TitleGarrison

No bird ever flew nonstop from New York to Tokyo, or raced 15 miles high at triple the speed of sound.                                                                                                   
  But birds do something else.
  They do not conquer the air; they romance it.
.”

  Peter Garrison

HoursAndCounting

Jur's RV7 Aircraft Factory
2917 hours
and counting
Some decisions in life are bare of any obvious logic

 

In preparation of installation of the top skins, I had to put the fuel tank on the spar.   I remembered I still had to cover up some rivets heads on the tank baffle and replace some of the rivets.

I first installed the cork gaskets on the access doors and tried to pressure test the tank. I soon found out that the cork did not stop air from going out via the access plates.

To avoid any other problems with them, and after inspecting the interior of the tanks one last time, I decided to seal them with proseal without the cork gasket. The cork gasket is known to cause leaks after 4 to 5 years.

Here is the sealed fuel tank sender access plate on the tank baffle.

There is an inconvenience with this approach of not using a cork gasket. The flop tube has a shelf life and needs to be replaced after a number of years. In that case, I'll have some annoying task of removing the sealed access plate.

Then gave it another try.

Installed the fuel tank test kit which consists of a cover nut for the fuel line, a pump valve that goes in the drain point through which you can inflate the tank. I also made a smal pipe that is mounted with regular flare and nut on the vent line to install the balloon.

Also taped the fuel cap with duct tape.

Be carefull when pressurising the tank, especially if you use a water level. The pressure in the tank may quickly exceed acceptable levels causing permanent damage to the  tank assembly. Go easy with the air input and do not use a air gun. Just use a bike pump. That will do it. You will be surprised how little air you need to put in to inflate the balloon. 

The balloon was fine for the entire evening, but ... the next day it was deflated. damned !

I'll have to try this again with the tank off the spar and using soapy water to test for small leaks.

How to use

Use the kit buttons in the top ribbon bar to see a chronological overview per sub section per kit. For the full chronological article list, see chronological build link in prelude menu here below. The easiest way to lookup information is by typing in some part numbers or keywords using the search option in the ribbon bar

 

Caution !

Some advice on reading my log for fellow builders !

In some articles, I made corrections at later date on the original article to rectify my own stupidities or faults. Read through the entire article if you intend to use my findings/experiences on your own project !

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Legal Mumbo-Jumbo

It’s possible (not likely) that I’m not as smart as I think I am. (Occasionally, I have moments when I know this to be true. Fortunately, the feeling passes quickly.) Although I have tried to make this information as accurate as I can, it is not only possible, but also quite likely, that erroneous and misguided information lurks within these pages. I cannot and do not warrant these pages to be error free and correct. Furthermore, I accept no liability for the use of this (mis)information. And, as many would say, your mileage may vary. If, after reading this, you are intent on proceeding, please be aware that the contents of this site are protected by copyright (copyright © 2011 and 2012). Nonetheless, you may copy this material subject to these two conditions: (1) any information used is for non-commercial purposes, and (2) the source of the material is properly credited. Of course, you may link to any page herein. At some articles, snippets of the plans from Vans are visible. These are for educational and illustrations purposes only and should never be used as plans for part construction or assembly as plans may have changed since the picture was taken and more important they are protected by Copyright by the Vans Aircraft Mothership company.

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