I’ve been flying a Thor 80 for the last two months. Although I love this little beauty in regards to thrust (somewhere between a Thor 100 and Thor 130), the smoothness of the engine and how incredible easy it is to start – I’m experiencing for the first time really angry neighbours. Even the farmer who own our airfield asked me to go back to one of my other engines (Thor 100/130/200) as the noise of the Thor 80 is comparable with a really fucked up angry chainsaw on amphetamine – and the animals on the farm acts nervous while I’m flying. While flying it sounds like a Thor 100/130 to me, but from the ground the noise is just terrible.
Other than the noise I’m totally in love with my Thor 80. Hopefully there will be a “low noise kit” available soon. A new airbox would help, but I guess the problem is more the muffler.
I'm 85 kg, flying an Apco Lift EZ M and Apco Force 2 M. I use a Helix 130 cm propeller (said to be) made for Thor 80.
Trond