Hi All,

Was wondering if I could get some advice on a header tank that basically doesn't work.
Normally when fitting out a jet I use a commercial header such as the UAT, MAP, Intairco etc.

I thought I would make a "dodgy" one for my Xcalibur using an ultra flash header tank. Pictures attached.

So when I take off the header is pretty much full. Fly a straight and level flight and you land with a full header. Do slow roll and you can just hear the engine starting to get a few bubbles. If you really push it you get the nice white smoke flame out that we have all seen. Upon landing the header is still pretty much full.

Why is it so? You would think that a small air space in the header wouldn't really matter that much but my testing proves it does.Does anyone have a good theory on what is happening?

Paul.