Should I trust DS 821

[MR M]

Should I trust DS 821 servos to power aileron and elevator in my Showtime 90, I am using a 6V Batt. they say 88oz torque with that. Also I bought some JR 4-40 Aluminum servo arms and they are very tight to squeeze on, is that normal, DS 821 are made by JR so i figured it would be a good match. I just hate forcing them on. Any ideas!!!!!!!!

[randy racer]

NO! a friend of mine i build a lot arf's for used them in several smaller planes and they are not holding up very well. two in a funtana 100X had the arm splines break off and on a jerry's big boy elevator one couldn't hold and caused flutter. he is pulling all of them out and replacing with better servos. i think he has around 30 of them in planes and is afraid to fly them.

randy

[Memo Lomeli]

Hi I have this servos in my showtime and in my Funtana 90 and the torque is enought, the aluminium servo arm are difficult to put, but they work great!!!!

[MR M]

Thanks guys, i decided to keep them in, the aluminum servo arms were difficult to put on, i was just not used to them, but they are the right fit, just snug.

[flybye]

servo arms that are aftermarket are usually tight to ensure a good fit, and to prevent slipping.

[mtwister]

I have 4 1.20 size planes that are fully equipped with the 821's. they have been rock solid, and two of the planes I really rip them around in 3D. I am very pleased with their performance. I also have them in a 13 pound Ultimate, and they really woke that plane up for me.