SonexBuilders.net

In this conversation there seems to be a failure to understand the difference between fuel pressure and flow (volume).

Carburettor engines operate, for the most part, on fuel flow ie little pressure

We often use fuel pressure as a handy gauge of fuel system delivery efficiency/health, however you can have good pressure and poor/minimal flow.

In an aircraft fuel system it is generally easier (cheaper/simpler) to measure pressure than flow, although fairy recent innovations have made this observation less applicable than the past.

I am an advocate for transparent wall filters, so that the pilot can have some hope of visually assessing filter blockage.
Note: a blocked filter may have minimal impact on fuel pressure but restrict flow to the point of reduced engine power or failure.

builderflyer wrote:But, I can't say, though, that I've found a direct connection between measured fuel flow rates and the ability of the fuel system to produce "burps", or not.

Art,,,,,,,,,,,,,,,,,,Sonex taildragger #95,,,,,,,,,,,,,,,,,,,Jabiru 3300 #261

Art,
I really believe the burps are all about heat. I'm on a quest to get rid of the burps and the excessive heat buildup in summer. I definitely agree with you about experimenting. That is part of the fun and to make your airplane a little better is very satisfying.