So the next question would be how much fuel did the RH sightglass show at that point in time?
Another question would be how much experience you had flying the CT at similar fuel levels?
Given that in a right turn the wing would be up, one would think that it would take significant uncoordinated flight to unport that tank outlet, perhaps an uncoordinated levelling off interrupted the fuel flow.
But remember we are talking about the last 5 litres in a 65 l. tank. This is where interruptions in fuel feed can be expected.
A CTSW manual on the web (the accident a/c manual may be different) cites fuel capacity of 130 l. and usable fuel as 124 l. That would mean a total quantity indication of 6 l. is effectively empty.
A gauge inaccuracy of plus or minus 2 to 3 litres in a 65 l. tank becomes critical at this stage in the proceedings.
One can also suspect that such a low unusable fuel quantity requires coordinated flight and that any imbalance could considerably increase the quantity of unuseable fuel.
Vince kindly replied earlier in this thread to the point about min usable fuel being around the fuel level he admitted to having just about the time that the engine stopped. He has apparently received confirmation that his aircraft was safe down to 1/2 litre remaining.
Given the long history of fuel cross feed problems on this aircraft type, and the firmly worded warning about the consequences of flying it out of balance when low on fuel, I find the statement that it's OK down to 1/2 litre frankly unbelievable.
Every high wing microlight with wing tanks that I know of (with the exception of one that sensibly has a conical collector tank fitted in the fuselage) tends to suffer from fuel flow difficulties of some sort when the wings aren't level or at low fuel levels. If it were me, I'd have not been comfortable continuing my flight with less than about 10 litres or so remaining. I believe that the US manual, which gives 124 litres as the usable fuel, from a nominal 130 litre capacity is a reasonable figure. Quite why it isn't in the TADS for the UK microlight version is a bit of a mystery.
VP