Hi Dene, In a motorglider one is caught between a stone and a hard place.Ample cooling,intakes,eyebrows, vertical gills, are fine to cool the engine but when you stand on the wingtip and corkscrew up in a thermal,engine off,the drag of this cooling will degrade the gliding performance and worse still introduce shock cooling to the engine.Therefore I suggest that you make all these cooling devices so that they can be closed off to prevent shock cooling,engine off.and streamline the aircraft so as not to degrade gliding performance.These opening and closing devices are easy to make and operate.Just my few cents worth ,also for KR 2 motorgliders. Best Regards, Eric, South Africa.
