RE: Hi-Tech servos?
I too have had good luck with the Hitec line of servos.I have been using 425 dual bb's , 625 & 645 mg's since 2000 in many 1/4 Mustangs,Midgett Mustangs, and several of my Ducted Fan jets.I have two buddies here at my flying site who use 645 mg's on Kangaroos and have also used them on Hotspots and other turbine ships as well.There has not been one failure in any of these cases.Many many fellow fliers at my field fly with Hitec servos
I Personally started using the Hitec 5645 & 5945 digitals around 2001 again in big prop planes as well as ducted fans.I never had any problems with my big prop planes which were really put to the test and I have had many fast mustangs and ducted fans that they have worked just fine in too.I think the majority of the problems were with the Hitec 5245 mini's.There was several reported losses associated with those if I recall.I have two of those here but will just use them on gear & brake valves in one of my jets.My SM Gripen has a Hitec 5945 on the canards ,I have no worry of using it honestly as I have never seen any failures here at my field firsthand with Hitec servos.I always do test them very good with my Hitec programmer many times over before using just to be safe but I also do the same with JR digitals too.Heck I have been using the cheap 425 bb for years on every control surface in different planes and these are only 45 oz. of torque.Now I will say this however -on my SM F18 I have all JR servos digitals(8611 & 8411) thru-out with multiplex wing servos on the rudders-I used these cause I wanted to go by manufacturer recommendations plus I have one of the JR Matchboxes in it as well . My SM Gripen has 8411 on the Elevons and a 168 on the rudder.Now to turn the coin -In the future I will be using JR 8411 & 8611's on my new jets mainly cause I can get them for moreless the same cost as a Hitec 5945 thanks to good sources .Overall They do seem to offer better centering with more torque.
Steve