The Corona pump keeps the fuel pressure constant at just under 0.4 bar on my 912UL. The vapour return line orifice is 0.35mm bore, as specified by Skydrive.
Correction: (From LAA Safety Spot) One thing that has been discovered since the December edition is that the diameter of the return restrictor in the continuous flow system is critical to system performance; these restrictors are essentially metered carburettor jets. Skydrive, the UK agent for Rotax, manufactures a clever ‘T’ piece which contains one of these jets and, as 0.35 was stamped on the side of the jet, it was thought that this number related to the jet’s size, 0.35 mm. Well, we now know that this number relates to a fluid flow number which, whilst related to size, isn’t a dimension in the normal sense. Nigel’s measured a few as far as it is possible to do so and a 0.35 jet appears to be about 0.7 mm
Last edited by patowalker; 5th Nov 2016 at 17:20.