>>I'll stick to Avgas in the BD-4 even though the 7:1 compression ratio engine >>(same as Super Cub) can handle unleaded from an octane rating basis.
Unless things have changed, with some two strokes used in SLGs like the Solo engines, the manufacturer recommends using 95, not Avgas. The claim is that Avgas makes the engine run rougher and vibrate more than 95. It's difficult to get a real picture but a lot of the US experience, where they tend to overcompensate and use Avgas instead of 95, seems to suggest they have more problems overall, not less. Then again, they can't get the recommended Castrol 2 stroke oil either. I tend to agree with Mike here regarding resins too. It's really difficult to point your finger at the fuel without knowing more about the resins used in the layup. And the problems and expense of wing fuel bags seem to be not worth the effort. The recommendations in the manual that I have read say that they cannot be left with fuel in overnight, that they cannot be entirely drained either but need to have a small amount of oil in them. They have a very short life span (8-10 years?) and are sodding expensive to replace. Probably cheaper to replace than a fuselage mounted glass tank though! D _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
