RE: Fuel system plumbing and air trap consideration
Yes Vincent, most of the setup will work on a flexible UAT if done properly ( limited restrictions, large vent ) up to 160N class engines.
However I have seen my F-84G getting 4 flameouts with a brand new P-160SX. That was only due to the BVM UAT getting vacuumed and generating cavitation.
This same UAT has been used since then with a P-60 and gives complete satisfaction.
I have extensively checked the fuel plumbing and could not see any restriction. It's only when I did a very careful test with the closed loop that I realized what was going on.
I changed the UAT with a PST air trap and never got any problem any more.
Same story with the P-180 and P-200.
This happened to me over a year ago and I have never had any problems since then with my new setups.
So to be on the safe side, I apply this rule...