Some 912S engines were (are?) supplied with the extra glass shroud around the cylinders and some weren't. If you have it then the extra hole is clearly needed, though it isn't very beautiful. If not
When the email list was hosted on a UK server I used to do what I could to oil the wheels on behalf of the Club, whose initiative it was originally. When that became impossible the discussion was tr
Sometime around 2000 I enquired of PFA Engineering about the possibility of cutting down the centre tunnel (on a Classic) in the vertical plane at the same time as carrying out a taildragger conversi
Several years ago I submitted a Modification request to PFA Engineering to cover a revised fuel system with aluminium pipes and home-brewed tank fittings, much like Graham's. The return feed went ba
Many years ago I contacted SP about the useful life of Ampreg. The technical adviser said that the shelf life they publish was underwritten by periodic tests on batch samples kept at their factory a