ORIGINAL: Waco
I thought this was common knowlege, there were some rather long threads on this subject in the radio section and also in the Hitec support thread. You can run what you want too, but why take the chance. I do know for a fact that Hitec does not recommend using Karbonite geared servos in gas engines if you don't believe me do a search in the radio section and the Hitec support section.
This is what I did, I did a search on karbonite geared servos and came up with guys making statements, Mono vs Ultra type of stuff, normal RCU chit chat. I went ahead and emailed hitec direct and posted the question to them. I have been using them in 40% IMAC and giant scale IMAA planes for a very long time and running some very big gas engines. Perhaps I have just gotten lucky?? Maybe I just set up my planes so well I never have problems??
I will post up the answer from HT when I get one. I only use Ultra!!
Mono is OK for trim!
