Hi,

short question. I wan't to install HS-81 MG servos for the ailerons of my hangar 9 twist. Is this Mini Hitec Servo strong enough for the ailerons ? The servo installation need some modification because the hole in the wing is precut for a standardservo.

Regards
Frank

Personally i havent flown the twist but what i would do is put some Hitec 311 standards in there. they are only 3.99

I wouldn't use them. The surfaces on the Twist are pretty large, the 81 would be fine for the throttle.

Strong enough? Probably, but maybe not . I assume you re looking to save weight, not worth it, IMHO.

HS81's are great servos for foam, but they are pricey and not well suited for this application. For less money, you have far better options.

Almost any standard servo would be fine, but I like BB's and MG's. JR sport ST47BB is a cheap BB servo with 47 oz/in at 4.8v. I think they are $13 here.

Many moons ago, I had 81MG's on a Tiger 2 that I had converted to dual aileron servos. They worked well in that application, but I don't think they would be a good choice for high throws and large loads. I have 225MG's on a Morris Sudohkhoi's ailerons and they have worked very well.

I would not do it. I would at least use Standard servos. Go here for all the Twist info you could possibly need. Hangar 9 Twist 3D.

Use the Hitec 225's They will work fine.

I have used hs81 plastic gear on a 60 size airplane, they broke, but the servo had enough power for the ailerons, I have seen a diablotin and a bigger plane using them for a long while and they are fast, light and strong, and donĀ“t rip apart if they are MG, aaand you can save 3-4 oz

I think you answered your own statement. HS-81's broke on a sixty size plane. On throttle that would be OK. Not on control surfaces of a standard size .60 size plane. Yes they will get you thru a few flights however once you start pulling some G's they will fail. I have used the following set-ups to save on weight. The following setups - HS-81 on throttle and HS-225(Nylons they have better resolution when centering then the Metal gear) on all control surfaces on theses planes, the Tower Uproar, Sig Fazer and all Q-500 planes which reach 100 to 105 Mph.

on throtle I use a hs 55 !! no problems... donĀ“t get me wrong, I agree in the statement that plastic is more precise, but for 3d flyin you need weight saving over presition, and I have seen the 81MG to be right on a diablotin like plane (bigger) with no lacks on power and not ripping apart. ...yes, IĀ“m a weight saving freak
Did you notice that pylon racing motor mounts (radial) saves another 2oz?

I bought four strong Hitec HS-475 HB Standard Servos for the control surfaces and use a HS-81 MG for the throttel. Used with 6 V on-board power they should be strong and fast enough for my usage. I think I'm on the proof side with this combination. Thank you for your recommendations !

Frank