[j ferguson]

Hi Sid,
A day tank is an intermediate tank which is connected to the engine. It is usually smaller than the mains and is the one which you pump fuel to from tanks which might not be as well equipped with gauges or glasses. The one on the FE2b is a gravity feed tank. My guess is the other tanks would not feed by gravity and accordingly all fuel going to the engine gets pumped -maybe by hand - into the day tank where it falls by gravity to the engine making the tank a kind of buffer. Perhaps John McKensie will enlighten us on how his system worked.

Another advantage of a system like this is that you can filter the fuel coming from other tanks before it goes to the day tank and so if you have any problems there, you will know and can land using what's left in the day tank. This does require that you pay attention, though.

I like this system because it's simple, almost as simple as what you had on the Luscombe, and I had on the 120 - simple gravity feed.

One of my personal bugaboos is fuel systems that no-one really understands. The real risk of a not-well-understood fuel system is that if it fails to deliver, you may try to troubleshoot it rather than putting the plane on the ground and while so-doing use up the time you might have spent looking for Aunt Millie's tea party on that really big lawn.

john

Correction: I've been told not to call it a day tank since it's on an airplane, not a boat. Try "Feed Tank"