Hi guys and gals, I know this has been discussed before but I can¹t find any specific clues to my problem in the archives.
I have a 1966 Alon A2 with a C90 and the standard prop. Fuel consumption seems to be quite high, higher than it should be. I¹ve been waiting for some fine weather to fly a reasonable distance to give a good measure, to avoid the taxi/climb bias of the short trips over the winter. Last Friday I flew solo a one and one half hour trip and it drank 32 litres, or 23 litres per hour (6 USG per hour). I flew at 2,000 feet at 2,200 rpm which gave around 82 knots IAS. The engine is pretty old and has done 1,200 hours, about 300 hours since a major top end overhaul. It runs very sweetly and is consuming only 0.2 litres of oil per hour (less than half a US pint per hour). The prop is only a couple of years old and in very good condition. At my last service I had the engineer take the floorboards up and have a good check for fuel leaks and he found nothing. So is this excessive consumption? It seems well above book figures and if so any ideas how to investigate further. I¹m concerned about range at this stage 3 hours including reserve although with Avgas here at $9.50 a USG it is a little expensive as well! Thanks, Mike
