Luke....... It's all about the money
The reason you have not seen mention of the Grob 115 is that the civil versions of the aircraft are of GRP construction and are not of spectacular performance, the O-235 powered Grob115 have much the same performance as a PA38 or C152, it is nicer to fly that the 152 but on par with the PA38 but costs more to operate.
The RAF are running a military Grob 115, this may look like a civilian 115 but it has an Aerobatic O-360 engine, VP prop and is constructed from CRP ( Carbon fibre). All of this puts the price up to a level that makes it prohibitively expensive for basic civil flying instruction.
Last edited by A and C; 25th May 2015 at 17:15.