Well, I doubt *everyone* voting owns a TH .46, but several of the guys that posted replies have said they own one or several. I was hoping to get feedback from owners of each engine, and maybe some feedback from some that owned both engines. I was leaning towards the ST .51 ringed engine simply because I've only owned ringed engines so far (two OS .50 SX engines), but the TH .46's higher power spec has me interested as well. I didn't mean to pose the question in a biassed manner, if I came across that way. I did expect to hear from people who would be biassed one way or the other, and hoped to hear some good reasons or facts for their choices. Obviously post like yours, "I own 3 TH .46's and am happy with them", mean more to me than posts like, "TH stuff sucks, go with Super Tigre"...

I still haven't decided which engine to get for my second nitro plane, but in the meantime, I am actually building an electric plane!