Advice upgrading from 3S - 4S on Custom Frame
- Thread starter Hood49
- Start date
PeteDee
Mr take no prisoners!
Actually the 4S setup will be better on JST connectors, more volts, less current, same with the wire!
Motopreserve
Drone Enthusiast
Maybe we are not talking about the same JST? I may be referring to the wrong thing. I'm talking about the small red connectors (like on a tiny 3S battery) that a 14AWG wire wouldn't fit into.
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PeteDee
Mr take no prisoners!
No we are talking about the same thing. They are rated for 3A and should never be used on a 450 size quad except for running LED's or video. It probably came out a little wrong, was trying to say that the JST's will handle 3S better than they will handle 3S, they should not be used though for power distribution to ESC's, just silly that someone did.
I know manufacturers that will tell you that an 18A ESC with JST connectors on a 450 quad will be just fine as a quad will only draw 4-6 amps per ESC when hovering but would you want to risk a $1,000 quad to some 10 cent connectors that just might not be good enough or when you give it the beans and it draws 15-30 amps per ESC.
Best way is a proper battery distribution arrangement that is totally bulletproof.
Pete
I know manufacturers that will tell you that an 18A ESC with JST connectors on a 450 quad will be just fine as a quad will only draw 4-6 amps per ESC when hovering but would you want to risk a $1,000 quad to some 10 cent connectors that just might not be good enough or when you give it the beans and it draws 15-30 amps per ESC.
Best way is a proper battery distribution arrangement that is totally bulletproof.
Pete
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Motopreserve
Drone Enthusiast
Gotcha. Then we are definitely on the same page. Even if the hover is fine - it's the burst that'll kill ya 
Hood49
Member
Guys,
I am a couple of stages further.
I have remounted the quad with the new SunnySky's, New ESC's.
The ESC's were very hard to get fitted as they are slightly larger than the old ones. The front ones I needed to put in sideways to make it fit.
A lot of soldering: Power board, motor wires,... Going crazy
Fired it up and all is beeping as it should. I also checked the rotation of the motors and sorted that out with revering the ESC wires.
I have got a 4000 Mah Genns Ace 4S battery. I wanna get some flight time with the quad. However, the place at the back is getting too heavy I think with this new battery. This is going to alter the Center of Gravity substantially. So maybe mount it in the middle on the top. Not the best thing when looks are important but it might allow the quad to fly better? It also givens me som room to put some stuff at the back.
What do you think?
Thanks
I am a couple of stages further.
I have remounted the quad with the new SunnySky's, New ESC's.
The ESC's were very hard to get fitted as they are slightly larger than the old ones. The front ones I needed to put in sideways to make it fit.
A lot of soldering: Power board, motor wires,... Going crazy
Fired it up and all is beeping as it should. I also checked the rotation of the motors and sorted that out with revering the ESC wires.
I have got a 4000 Mah Genns Ace 4S battery. I wanna get some flight time with the quad. However, the place at the back is getting too heavy I think with this new battery. This is going to alter the Center of Gravity substantially. So maybe mount it in the middle on the top. Not the best thing when looks are important but it might allow the quad to fly better? It also givens me som room to put some stuff at the back.
What do you think?
Thanks
Motopreserve
Drone Enthusiast
I think you're best off putting the battery center top. CoG is paramount for most controllers to function at their best, so you might as well make it easy on the poor thing
Hood49
Member
I had 9" props but now mounted 10" as they say that you get better flight time.
Problem is that the SunnySky 2012 motors are all delivered with a clockwise tread. I hear stories that the nuts spin off. How true is that?
I do not want my quad to come falling down from the sky. I have a nasty feeling it will do without propellers.
Therefore I have put a locking nut on-top of the first nut. I have done this only for the two motors that are spinning clockwise.
Are there any other solutions for this? Do you think that the lock nuts will work?
Thanks.
Problem is that the SunnySky 2012 motors are all delivered with a clockwise tread. I hear stories that the nuts spin off. How true is that?
I do not want my quad to come falling down from the sky. I have a nasty feeling it will do without propellers.
Therefore I have put a locking nut on-top of the first nut. I have done this only for the two motors that are spinning clockwise.
Are there any other solutions for this? Do you think that the lock nuts will work?
Thanks.
Motopreserve
Drone Enthusiast
Nylocks are great. Slap them on the other two also, and go fly!
Hood49
Member
Great indeed. I do not have any nylocks. I will go and look for some.
I have tightened the two clockwise props with the lock nut and I will try to go and fly this evening.
I have powered up everything with the props to see if all is going as it should (with a big weight on the quad). Jeez, these motors go in 4S! Looking forward to getting this thing in the air.
I have tightened the two clockwise props with the lock nut and I will try to go and fly this evening.
I have powered up everything with the props to see if all is going as it should (with a big weight on the quad). Jeez, these motors go in 4S! Looking forward to getting this thing in the air.
Motopreserve
Drone Enthusiast
Mid be VERY surprised if the nylock give way. You should be all set.
Hood49
Member
Just made my first successful flight.
Wow, These SunnySky's with 4S are like a rocket! I am impressed. I needed to do some trimming. Goes well with the 10X5 props.
Got a Genns Ace 4000 Mah and after 10 minutes cells were at 3.85. I needed to stop because of rain in the air. But I suppose I will get 15 minutes out of them.
It flies like a wasp on drugs. Really happy.
The only thing I noticed is that when accelerating it shivers a little. Tuning does not stop with these things :livid:
Wow, These SunnySky's with 4S are like a rocket! I am impressed. I needed to do some trimming. Goes well with the 10X5 props.
Got a Genns Ace 4000 Mah and after 10 minutes cells were at 3.85. I needed to stop because of rain in the air. But I suppose I will get 15 minutes out of them.
It flies like a wasp on drugs. Really happy.
The only thing I noticed is that when accelerating it shivers a little. Tuning does not stop with these things :livid: