_airworthy_

It sure is Erlend. Come to Stavanger and have a look for yourself. Best engine I've ever flown! Light, high quality components, about the same consumption as its little brother EOS 100 Booster ICI - and 71 kg push in the 130 propeller. I'm in love

Hi Simon! Thanks for your reply. I've checked the exhaust and everything seems to be in perfect shape. I will try to exchange the airbox with another and better one, and also change from an 130 cm Helix to an E-prop propeller. That might help. On the ground the Thor 80 is one of the quietest machines on our airfield as well. But as soon as I get in the air the noise is just terrible. I will deep into the issue I'm experiencing and find a solution. Trond

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

I'm also 140 kg all up and have been flying a GTX 24 since it came out last year. Have logged about 80 hours on this wing. Although I love the feel of it and very much agree with the other comments in this thread, I do have some issues with oscillations on every trim setting except full slow and full fast. Neutral trim setting is the worst. Anyone else having these problems? I tested a 22 as well and although some oscillations not so bad as for the 24. I fly a Zenith Thor 130.