What Servos?

[Ace Dude]

What servos is everyone using in their Lepton that fit without modification?

[andrebandre]

jr 3421.expensive but can take abuse.

[3secondsToImpact]

Airtronics 94761z on cyclic, very fast digital servo!
Futaba 9650 on tail (but with mod go for the Futaba 9254, drill new holes or use tie wraps)

[xircom]

Airtronics 94761z on cyclic. Mods for 9254.

[Ace Dude]

Thanks, folks. I decided to go with the Airtronics 94761Z servos.

[husafreak]

Maybe consider a JR3400g on the tail.

[eheliflyer]

94761s on cyclic and 9254 for tail. Go this route and save yourself the pain of having to switch it over. This is by far the best way to go. The only mod you will have to do is drill 2 extra holes so that you can mount the 9254 directly on the frame. Take your time drilling and use the right size drill bit. I have seen some guys rush it and use a bit that was too large and the frame splintered.

[prototype3a]

I was talking to a knowledgeable heli guy today and he said that you want a really fast digital on your tail because the 401 reaches it's optimum when using a digital servo that has a 60 time in the 0.08-0.06 range. The 9650 works well with a 401 on a trex 450 because it has the better centering, more torque, and higher framerate. Ideally you'd want a faster digital on the trex but no one makes one small enough that is also strong enough to work the tail.

Honestly I don't understand why Hirobo didn't make the Lepton to use a full size tail servo. I suppose I can hope MJP carbon will make new frames that are cut to use these.

I think it's becuase of this enfatuation of saving weight to get more performance. There are times and places to count grams. This is not one of them.

[eheliflyer]

The 9254 fits right in the slot all you have to do is drill 2 small holes and that is it. It is not a big mod at all.

[xircom]

I think proto is right, the Lepton tail could be much better from beginning, means full size tail servo, bigger tail blades from beginning, different tail braces and finally a longer fin not using this bending plastic... anyway, once you made all this, you get probably the best flying e-heli of this size.

And BTW, it seems that rchover got a frameset with bigger tailsize servos ? I have never tried it http://www.rchover.com/inc/sdetail/59081

But of course as eheliflyer says, it's not rocket-science to fit the 9254 into current frame, it's big enough.

[prototype3a]

I just noticed that MJP's frameset does have a longer cutout. They just have you use the bracket that came with the original frames to mount whatever size servo you want. If I ever smash up my Lepton hard enough to break the frames I'll just get the MJP ones and that'll fix it.

Thought about it some more and since these are the only real mistakes Hirobo made when designing the LEX I think they did an incredible job. I don't have enough fingers to count how many mistakes Align made with each of the T-rex series helos.

[Two Left Thumbs]

What servo wheels are you using on the 94761z?

I tried a Futaba wheel, but the splines do not match.

The 94761z comes with a white cross arm with 12.5mm spacing, but I'd rather use a wheel.

Thanks

[CRAZYKEV]

I used the cross arm and it works fine.

[Two Left Thumbs]

OK, thanks.