The second row of pictures above running left to right show the K&N air filters on the Tillotson carbs. The second and third picture show the two stroke oil emitted from the pulse fuel pump during a two hour flight after the engine was rebuilt in Arizona. The fourth and fifth photos show oil bleeding from around the top of the cylinder heads after 6 hours engine run time including two flights. The engine before the rebuild had 97 hours and never demonstrated this leaking oil around the cylinder heads. The sixth, seventh, eight, nineth and tenth photos of the insturment panel show in sequence the drop in rmp. from a one minute warm up then full throttle at 98 degrees C to 193 degrees C at full throttle. Note the bleed off of rmp. as the engine warms up to operating and takeoff temperature. At 145 degrees C engine is dropping below the minimum takeoff rpm of 5800 and at 193 degrees C is at 5600 rpm. A properly warmed up engine will be much warmer at take off than 145 degrees. These pictures were taken November when the air was cold and dense. The rmp. drop is more dramatic in the summer when it is hotter and density altitude is more normal. The last three pictures show the operating limits and minimum rpm requirements for the rotax 505 in the dg-400. Click on the thumbnail photos for a larger photo.