My new build need info on batterys
04-09-2008, 03:21 PM
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My new build need info on batterys
I have had this boat for months doing nothing now i have all the parts its build time
ABC Falcon
Length 36 1/2"
Width 9"
The brushless motor im not sure on the size, brought it off ebay months ago, and is a good quality one.
I am useing a ETTI water cooling speed controller.
Twin rudder setup
1350 Lipo's each battery pack are 3 cell
I dont know a lot about these type of batterys and how you set them up.
I would like to use least 4 packs.
My question is
What is the best way to connect the batterys together and once they are all connected together what about charging
ABC Falcon
Length 36 1/2"
Width 9"
The brushless motor im not sure on the size, brought it off ebay months ago, and is a good quality one.
I am useing a ETTI water cooling speed controller.
Twin rudder setup
1350 Lipo's each battery pack are 3 cell
I dont know a lot about these type of batterys and how you set them up.
I would like to use least 4 packs.
My question is
What is the best way to connect the batterys together and once they are all connected together what about charging
04-09-2008, 05:51 PM
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RE: My new build need info on batterys
You really need to know the KV rating on the motor
KV is how many rpm the motor turns per volt applied
your batteries are they 3P or 3S ?? ( I see in the pic that the 2 silver batteries are 3S to get the 11 Volts)
and last but not least how many batteries will fit in your boat when the cowl is in place ???
KV is how many rpm the motor turns per volt applied
your batteries are they 3P or 3S ?? ( I see in the pic that the 2 silver batteries are 3S to get the 11 Volts)
and last but not least how many batteries will fit in your boat when the cowl is in place ???
04-10-2008, 07:51 AM
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RE: My new build need info on batterys
ORIGINAL: nitro bry
My question is
What is the best way to connect the batterys together and once they are all connected together what about charging
My question is
What is the best way to connect the batterys together and once they are all connected together what about charging
Ryan
04-10-2008, 09:29 AM
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RE: My new build need info on batterys
well you can see in the pic the mystery packs are 12c 1350mah so good for around 16A that motor looks like a 36mm can dont quote me on that . already it doesnt look good for the batterys you could run two to dobble you amps but its still lookling close. whats the amp rateing for the esc i would thank youll need no less then 40amp if thats a 36mm or the same size as a 540 brushed can need some specs man
04-10-2008, 11:10 AM
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RE: My new build need info on batterys
The battery's are Lithium Polymer 1350mah 12C / 3S
I could fit all 9 and more of the batterys in the hull so i have plenty of room for them
The speed controller is a ETTI and has the following
6-24v
45A
(nimh) 6-16
(lipo) 2-5
I brought the motor months ago and cant remember the make of it.
The can length 60mm
Diameter 36mm
It is quite expensive one, i payed £70 for it.
Can anyone help with these specs
I could fit all 9 and more of the batterys in the hull so i have plenty of room for them
The speed controller is a ETTI and has the following
6-24v
45A
(nimh) 6-16
(lipo) 2-5
I brought the motor months ago and cant remember the make of it.
The can length 60mm
Diameter 36mm
It is quite expensive one, i payed £70 for it.
Can anyone help with these specs
04-10-2008, 01:20 PM
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RE: My new build need info on batterys
Bry, what is the KV of the motor? That will determine how many cells are placed in series. From the ESC specs, if you used any more than 3s, you would have to diconnect the BEC and use a receiver pack as the ESC will allow up to 24v.
Ryan
Ryan
04-10-2008, 02:53 PM
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RE: My new build need info on batterys
ORIGINAL: ryan_t888
Bry, what is the KV of the motor? That will determine how many cells are placed in series. From the ESC specs, if you used any more than 3s, you would have to diconnect the BEC and use a receiver pack as the ESC will allow up to 24v.
Ryan
Bry, what is the KV of the motor? That will determine how many cells are placed in series. From the ESC specs, if you used any more than 3s, you would have to diconnect the BEC and use a receiver pack as the ESC will allow up to 24v.
Ryan
5600kv
45A
04-10-2008, 03:09 PM
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RE: My new build need info on batterys
This is not something you are wanting to hear and I hate to break it to you. [:@]
That motor is not going to work for a hull of this size. At 5600kv it is far too much RPM for direct drive. On just 2s (7.4v) you will have an unloaded 40 000RPM which is 10 000 more than what I would want.
A hull this large will need lots of power to push it. To achieve this you would need to run higher cell counts such as at least 4s, I'd prefer 6s. With even 3s you would be far over the RPM limit of most inrunners.
Moving forward with this motor will only lead to burned up components. I would strongly suggest investing in another motor and keep this one for a 2s Rigger.
Ryan
That motor is not going to work for a hull of this size. At 5600kv it is far too much RPM for direct drive. On just 2s (7.4v) you will have an unloaded 40 000RPM which is 10 000 more than what I would want.
A hull this large will need lots of power to push it. To achieve this you would need to run higher cell counts such as at least 4s, I'd prefer 6s. With even 3s you would be far over the RPM limit of most inrunners.
Moving forward with this motor will only lead to burned up components. I would strongly suggest investing in another motor and keep this one for a 2s Rigger.
Ryan
04-10-2008, 03:45 PM
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RE: My new build need info on batterys
ORIGINAL: ryan_t888
This is not something you are wanting to hear and I hate to break it to you. [:@]
That motor is not going to work for a hull of this size. At 5600kv it is far too much RPM for direct drive. On just 2s (7.4v) you will have an unloaded 40 000RPM which is 10 000 more than what I would want.
A hull this large will need lots of power to push it. To achieve this you would need to run higher cell counts such as at least 4s, I'd prefer 6s. With even 3s you would be far over the RPM limit of most inrunners.
Moving forward with this motor will only lead to burned up components. I would strongly suggest investing in another motor and keep this one for a 2s Rigger.
Ryan
This is not something you are wanting to hear and I hate to break it to you. [:@]
That motor is not going to work for a hull of this size. At 5600kv it is far too much RPM for direct drive. On just 2s (7.4v) you will have an unloaded 40 000RPM which is 10 000 more than what I would want.
A hull this large will need lots of power to push it. To achieve this you would need to run higher cell counts such as at least 4s, I'd prefer 6s. With even 3s you would be far over the RPM limit of most inrunners.
Moving forward with this motor will only lead to burned up components. I would strongly suggest investing in another motor and keep this one for a 2s Rigger.
Ryan
I will have a go making a rigger with this setup.
Thanks for the info
Much apresiated
Thank you
04-18-2008, 03:06 PM
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RE: My new build need info on batterys
Ignore the info above
I have all the info on the motor now
I removed the water cooling and it was printed on there.
MOTOR
It is a Quannum drive
36-55
KV 1350
Load 50A
Hext Tronic HXT3655
SPEED CONTROLLER
ETTI
6-24v
45A
(nimh) 6-16
(lipo) 2-5
BATTERYS
1350 Lipo's each battery pack are 3 cell
Is my setup ok and how many batterys could i connect together
Back to my question
Whats the best way to connect them.
I have all the info on the motor now
I removed the water cooling and it was printed on there.
MOTOR
It is a Quannum drive
36-55
KV 1350
Load 50A
Hext Tronic HXT3655
SPEED CONTROLLER
ETTI
6-24v
45A
(nimh) 6-16
(lipo) 2-5
BATTERYS
1350 Lipo's each battery pack are 3 cell
Is my setup ok and how many batterys could i connect together
Back to my question
Whats the best way to connect them.
04-18-2008, 06:01 PM
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RE: My new build need info on batterys
ok so it looks like your motor's not bad then...The only problem is that with 1350 kv it means that on 3s you will have a no-load speed of around 15000 rpm... the thing will move - but won't be too impressive. With that kind of KV i'd expect 6s to turn that setup into a lively one. however, your ESC can only take up to 5 lipo (i think that fully charged 6s lipo would overstep the 24v limit)- so that's a bit of a prob. I would just run it on 3s 2p, or even 4p for longer run times, and when you can afford it change the motor, or ESC, or cells.
they're all good - just not perfect together...
they're all good - just not perfect together...
04-18-2008, 09:13 PM
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RE: My new build need info on batterys
Your motor is capable of pulling 50A and your ESC will only provide 45A, any more and it will let the magic smoke out.
At 1350kv, you need at least 5s to perform. Using 6s will need an ESC that can handle it. With your ESC limit you are stuck with using only 3s. I'd parallel the rest of the batteries if you wish to run that setup. You should be able to twist a 48mm prop.
If you want to invest in a better setup a simple 5s single pack would work well.
http://rclipos.com/Elite.htm
Ryan
At 1350kv, you need at least 5s to perform. Using 6s will need an ESC that can handle it. With your ESC limit you are stuck with using only 3s. I'd parallel the rest of the batteries if you wish to run that setup. You should be able to twist a 48mm prop.
If you want to invest in a better setup a simple 5s single pack would work well.
http://rclipos.com/Elite.htm
Ryan
