Which Jazz ESC for the Lepton?

[Gscott]

Thinking of replacing my CC HV45. Is the 40-6-18 enough for a 4s setup?

[Jafa]

My friend has a Lepton with 4S 3700 doing 2700 on the head
we have in flight current draw data peaking at 50 amps

The Jazz controlers have a good BEC

[poerqwa]

By looking at KC's powersheet I would say it's a bit too close to the ceiling.
I've installed a Jazz 55-6-18 but did not fly yet(waiting for the batteries :()
In my opinion this ESC gives me enough room.

[toyturbo]

I'm running the Jazz 80-6-18 just in case, having a 4 amp BEC built-in is nice too.

[wittgenfrog]

I'm running a 80-6-18 too and the 4 A BEC is a significant bonus...

[Gscott]

I may end up going with a 55-6-18. I would love to have the 80-6-18 but no one has them and the places I was able to find it want close to $300.

[Gscott]

Is the BEC in the 80-6-18 enough for 3 digital servos on the cyclic and a 9254 on the tail?

[vksy]

I strongly suggest that you get the 55-10-32 instead. The XX-6-18 only comes with a 4.8V BEC (check in case I'm wrong), so you will not be able to fully exploit your servos. The 55-10-32 needs an external BEC, but in doing so, you can run 6V and still have full control for an emergency auto if your ESC blows up in flight.

[Gscott]

Why the 55-10-32 over the 55-6-18? I thought the 6 in the model name meant it would do up to 6s.

[vksy]

My response has nothing to do with voltage input. The internal Jazz BEC should be okay, but just make sure because I believe the power output is only 4.8V. If your servos are rated at 6V, you will not be able to use their full potential. It doesn't make sense to have underpowered servos.

[ArthurKnowles]

Rge 6 in th Beat/Jazz/Smile line of products has to do with the minimum number of NiCad/NiMH cells not LiPoly. So it is 6 ~ 18 cells or about a maximum of 25 volts and 5S LiPoly.

As for external BECs of 6 volts, not for me. Nor do I recommend them for anyone using a Futaba Gyro and digital servo that doesn't support 6 volts. Before going that route, I suggest you verify that "all" your servos and equipment can use 6 volts wihtout damage.

[Gscott]

Thanks but I'm not interested in the 6v route. I'm upgrading to the Airtronics digitals and there really isn't enough incentive to go 6v especially since I'm going to run a 9254 on the tail and it doesn't really like 6v.

[vksy]

At the very least, consider using a 4.8V external BEC. You will have total control to perform an emergency auto if the ESC ever craps out.

[poerqwa]

Vsky,

don't you just mean 4.8 V battery?

[Gscott]

I'm trying to avoid going with an external BEC because I've had so much trouble with glitches on this heli.

[poerqwa]

Gscott,

I'm at the verge of completing my Lepton build (Kontronic Jazz 55-6-18).
Will be using the internal bec.

401 - 9650
JR 368 digitals
Hacker A30-10XL
Flightpower 4S1P 3700

I mounted the ESC below the battery in the nose area.(the idea is to keep the ESC in the wind :) )

Will let you updated on glitches... if any :cool:

[vksy]

Here's my setup:

Hyperion 10T
Hyperion 3700 mAh
Jazz 55-10-32
Medusa 3.5A 6V
R146DP
GY401
S9650 - tail
S3150 - cyclic

I've had zero glitching so far. The ESC is mounted in the stock location while the BEC is on the opposite side. All the servo and gyro wires are snaked in between the frames for a cleaner look. The ESC comes with a ferrite ring, so maybe that helps. I really can't say for sure though because I never took it out. The instructions state that it should always be attached to the signal cable.

[poerqwa]

Have about 14 flights now. No glitching whatsoever.
I ended up installing the esc in the hirobo advised location.

Ran it upto 2600 rpm's.

Greetz,

Marc