Builder Tip #51 from HomebuiltHELP 
What to know about your Battery Contactor
Master Relay -  Master Solenoid -Master Contactor : all alternate names for the Battery Contactor

These all describe the same device that we can use to quickly disconnect the aircraft battery from the rest of the electrical system.

This device is often confused with the starter contactor or starter solenoid. They are NOT the same! These devices are not interchangeable. A battery contactor and a starter contactor perform a different function in our aircraft.

Our short video explains the differences between these components and describes their internal operation. Then, we show how to wire them in your experimental aircraft.

Above: Example of battery contactor
    Single terminal coil connection
Even a kit aircraft requires you understand the basics of fuel system plumbing before building.

Our new DVD is aimed at addressing the skills and knowledge needed to install the fuel lines in a homebuilt aircraft.

We have attempted to place the basic instructions and demonstrations for plumbing a homebuilt aircraft fuel system on one DVD. Whether you want to userubber fuel hose, aluminum rigid tubing, or high tech braided flex hoses - it is all here on our new DVD.

The goal was to target homebuilders that already feel comfortable using rubber fuel line to now "move up" to rigid metal tubing. We show the material, tools, and skills required to start using tubes and fittings needed to replace some of those rubber lines. If you never thought you could run rigid tubing for a fuel line - we are looking for you! Cutting, bending, flaring - it's all there. Plus: how to select the right aluminum tubing.

Of equal importance is the use of the newer stainless steel braided Teflon flex hoses - almost as easy to use as rubber hose, but with greater durability and fire protection. We show how you can make these yourself - or purchase ready to go.

Please visit the detailed information on our new DVD and think about learning something new today!

    Demonstrating an  inexpensive hand bender
Showing components for flared connection
    Installing gascolator fittings
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