Grob 2500E1 engine
Thanks for that, I hadn't realised they weren't Limbachs (they look like them!
). Anyway, I've just checked the registrations of the gliding club that operates the ones I was talking about and they are 109Bs with Grob 2500E1 engines - they fly on average 40-50 hours a month on them and they don't have half the rough running incidences that the Vigilants seem to have. May be a coincidence, but they have had 3 109Bs with no problems. I also asked the engineer that looks after them and he said that he's never heard of issues with these civvy registered 109Bs.
So guess what? i've drawn a conclusion that a similar number of Vigis that seem to have quite a few rough running engines that something appears wrong - either the different fuel system or maybe training in the use of carb heat, would be my best guess?!!! Or maybe they run more than 50hrs a month on the Vigis and their engines are kn@ckered?
Don't know, I'm not an engineer, but it does strike me as a bit odd...
LJ
