Grob G109 Cooling System
Article from the UK, the following links about the G109B Turbo conversion are
(Look under the “GROB” menu)
(the original conversion I presume?)
(Forum about towing with motorgliders)
Comments: I have a G-109B in Thailand with cooling problem, and read on your website on your adding an external oil filter and modifying the lower cowl to your G-109. Could you please describe how an external oil filter helped cooling and its location?
The G109B is totally different to the G109, and consequently none of my specific knowledge is applicable.However, as a rule of thumb, the first thing to do would be to increase the air throughput by a) installing a NACA duct of some description on the lower cowl and b) sealing the junction between the air input side of the engine and the still air side, thereby forcing the cool air through the oil cooler and cylinder head fins.