Ultimate Fuel System Thread / Poll

[mike.smith]

What are those with no gascolator doing for a drain? How often do you open the filter to inspect it?

From what I remember reading on the yahoo groups, Sonex now recommends not installing a gascolator which would mean they don't think draining is required. They recommend the fuel line as short as possible and go in a straight line (as much as possible) from the tank down to the aeroinjector.

I believe the theory is that with the plastic fuel tank there is much less chance of condensation compared to aluminium tanks. You'll need to search the yahoo groups (which is a pain) where this was discussed.
(I'll do my best to try and find Jeremy's original post).

The thought is any water is going to go through the AeroInjector or carb in the first minute after startup, the fuel line being so short. As for sediments, that's another issue. If anyone knows where to find a clear glass or plastic fuel filter WITH NPT FITTINGS, I'd like to know. MANY out there without NPT fittings. I have found none "with."

Mike Smith
Sonex #439

[SonexN76ET]

Here is a glass fuel filter with NPT fittings, however they are only 1/8 NPT, I am still trying to find one with 1/4 NPT fittings:

http://www.aircraftspruce.com/pages/ep/ ... lineff.php

[kukurt728]

Sonex A model tail dragger ,jabiru 3300 with aero injector 2.5 needle straight 100ll avgas…
from the main fuel tank fuel shut off valve-gasolator- tee sample drain valve- mechanical fuel pump- fuel regulator- fuel flow meter- aero injector in between components are braided hoses with protection sleeves.
i get burped on take off , once i accelerate.idles fine and test wide open throttle on ground no burping.
i used to have midair burping since i installed the heat shield plate for aero injector and i use aluminum tape to cover the fuel pump, gassolator,fuel regulator and flow meter it went away .


is there any suggestions there?


mike