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View Full Version : Running BJ26 with 6S Lipo?



Tony
11-03-2008, 02:41 PM
Hey guys, some of you are running 6S Lipo with stock esc, and motor. I tried it yesterday, but it didn't run. How did you guys run it without any issues? I used Thunder Power Lipo 2 packs 3S 11.1v 2200mAh in series.

azjc
11-03-2008, 06:16 PM
I havnt done it so this is a guess, that the ESC won't arm with that much voltage and if there is a way to set the RSC in a manual mode might get it to arm

thrashmetal
11-04-2008, 07:01 PM
i used the pro boat programming card to set my esc up.

once i did that i was able to use 6s lipo and i ran it about 5 times then the esc wouldnt arm. so i reset the esc using the programming card again and it works once again.

Tony
11-04-2008, 07:04 PM
OK , i have the programming card. How did you set it?

thrashmetal
11-05-2008, 11:31 PM
this is how i have my programming card set when i program my esc.

battery type= lipo
cutoff voltage=high ( this sets it at 3 volts per cell)
cutoff type=slow down ( this will give you some power to still be able to drive the boat back to shore slowly if the lipo cutoff starts to kick in.)
brake=off ( brakes are for pussies .lol)
timing= high ( the stock motor doesnt seem to mind higher timing)
throttle curve=linear

this is the exact setup ive been using with my blackjack on 6s lipo and the only issue ive ever had is that i need to reprogram my esc from time to time.

have fun tony.

Tony
11-05-2008, 11:52 PM
this is how i have my programming card set when i program my esc.

battery type= lipo
cutoff voltage=high ( this sets it at 3 volts per cell)
cutoff type=slow down ( this will give you some power to still be able to drive the boat back to shore slowly if the lipo cutoff starts to kick in.)
brake=off ( brakes are for pussies .lol)
timing= high ( the stock motor doesnt seem to mind higher timing)
throttle curve=linear

this is the exact setup ive been using with my blackjack on 6s lipo and the only issue ive ever had is that i need to reprogram my esc from time to time.

have fun tony.

2x 3s 2200mAh 11.1v be ok? What lipo are you using?

thrashmetal
11-06-2008, 05:17 PM
im using a pair of 3s 3800 lipos.

any pair of 3s lipos will work.

6S HYDRO
04-30-2009, 12:19 AM
ran 6s yesterday w/ stock bec, no problems no heat issues

MAXAMUS
04-30-2009, 11:46 AM
iam waiting on a set of 3 cell 11.1v 4000Mah 30c lipo's arriving and will see what results i get from them hoping to see a remarkable increase in speed from what iam running now but to confirm what should the cut of be set to ??

bj26
fullers o/s cat hardware
ETTI 150 amp esc
2x 6600 mah 20c lipo (soon to be 2x 11.1v 4000Mah 30c)
futaba 2.4GHz TX/8ch Rx
custom water pick up
Rx power pack 1500mah
Rx power switch
octura x642 b/s or x640
Tupperware and bat trays removed
turn fins shortened sharpened and angled
foretrex 101 GPS

all up run weight 5lb :thumbup1:

Meniscus
04-30-2009, 12:13 PM
Please read the specs on the Brushless ESC in question:

45-Amp Brushless ESC


Specs

Forward:Yes
Brake:Yes
Continuous Maximum Current:45A
Input Voltage:Minimum 10V, Maximum 21V
Momentary Peak Current:55A
BEC Voltage:5.8V


I think that if you are running 6s at 22.2 Volts (nominal), then you should be prepared to replace the ESC. Another consideration, I haven't checked, but this ESC may only be setup for 4s, so your lipo cutoff could be in the dangerous range if the cutoff voltage is 9.6V for 6s. This would mean that the ESC would cutoff at 1.6V per cell. If this is indeed the case, then you should be prepared to replace your lipos as well, granted there's no fire. If there's a fire, then you may be in for the whole boat.

Like I said, I haven't confirmed that the ESC cutoff doesn't change according to the input voltage. Perhaps it does. Maybe someone else can weigh in here.

6S HYDRO
04-30-2009, 12:39 PM
all i know is it works

Meniscus
04-30-2009, 01:18 PM
all i know is it works

I know, I just wanted to caution those who read this thread now or later on.

6S HYDRO
04-30-2009, 01:23 PM
did you try the zigzag 3 cell yet meniscus?

Flying Scotsman
04-30-2009, 01:47 PM
You guys are idiots for posting this type of info. Now every RTR newbie boater will push their equipment way over their designed and engineered specifications :flashfire:

Douggie

Meniscus
04-30-2009, 01:57 PM
I wanted to see how you did on a longer run first, LOL ;) That way, if it goes, I can reconsider :just-kidding:

6S HYDRO
04-30-2009, 02:07 PM
You guys are idiots for posting this type of info. Now every RTR newbie boater will push their equipment way over their designed and engineered specifications :flashfire:

Douggie

actually alot of these companies lie about the specifications to keep there equipment safe. for example. sv27 esc is really a electrifly silver series airplane esc waterproofed and cooled. the specs for that esc is input voltage up to 21v or 5s yet aquacraft says 4s is the limit.

Flying Scotsman
04-30-2009, 02:12 PM
actually alot of these companies lie about the specifications to keep there equipment safe. for example. sv27 esc is really a electrifly silver series airplane esc waterproofed and cooled. the specs for that esc is input voltage up to 21v or 5s yet aquacraft says 4s is the limit.


Boats are way more demanding on the ESC than a plane or a car. Search the forums on ESC problems and specs that do not meet the demands of an FE boat

Douggie

frdvschvy
04-30-2009, 02:29 PM
:flashfire::flashfire::flashfire: :doh: It is not a matter of if..... It is a matter of when. Sooner or later your luck will run out. Mine did on Friday.

6S HYDRO
04-30-2009, 02:35 PM
douggie, true- but ive also been running the sv27 esc on 5s for over a year now, with no problems.

Flying Scotsman
04-30-2009, 02:38 PM
Yes, but what prop/Motor and batteries?

Douggie

6S HYDRO
04-30-2009, 02:44 PM
grim 40/52 3 blade, a mix of lipos from tp to flightmax

Flying Scotsman
04-30-2009, 02:56 PM
What are the battery specs? That prop is OK. I still can not believe you do have a problem unless all your boats run dry, as apposed to wet
Douggie

Jeff Wohlt
04-30-2009, 03:14 PM
Doggie, this has gone on since the BJ came out. 6S has been tried by many. No it is not something anyone recommends but it has been proven more than once and more than 10. Sure it will press the ESC hard..... but for that motor to not have issues is the key for me. A larger ESC is easy these days for little money.

These boards are to experiment and read others input. Stating they are idiots for putting that on a board is rediculous and not very nice. I, for one, like to see and hear this stuff. I think we all know when we plug anything in to our boats we pretty clinch our butt cheeks, cross our fingers and hit the throttle.

Meniscus
04-30-2009, 03:26 PM
...I think we all know when we plug anything in to our boats we pretty clinch our butt cheeks, cross our fingers and hit the throttle.

I thought I was the only one! :tape:

6S HYDRO
04-30-2009, 03:31 PM
Doggie, this has gone on since the BJ came out. 6S has been tried by many. No it is not something anyone recommends but it has been proven more than once and more than 10. Sure it will press the ESC hard..... but for that motor to not have issues is the key for me. A larger ESC is easy these days for little money.

These boards are to experiment and read others input. Stating they are idiots for putting that on a board is rediculous and not very nice. I, for one, like to see and hear this stuff. I think we all know when we plug anything in to our boats we pretty clinch our butt cheeks, cross our fingers and hit the throttle.

exactly:thumbup:

Flying Scotsman
04-30-2009, 03:50 PM
Doggie, this has gone on since the BJ came out. 6S has been tried by many. No it is not something anyone recommends but it has been proven more than once and more than 10. Sure it will press the ESC hard..... but for that motor to not have issues is the key for me. A larger ESC is easy these days for little money.

These boards are to experiment and read others input. Stating they are idiots for putting that on a board is rediculous and not very nice. I, for one, like to see and hear this stuff. I think we all know when we plug anything in to our boats we pretty clinch our butt cheeks, cross our fingers and hit the throttle.

Not really Jeff. I do not push my equipment as I like to save my pennies. The point I was trying to make is that many forum users will now exceed the manufacturers specs on all equipment. Yes, I can not be very nice from time to time, but I will stick by my point of IDIOTS unless you back it up with documented proof via Eagle Tree and or all other hardware/electronics etc. is specified.

Douggie

Meniscus
04-30-2009, 05:16 PM
This is the exact reason why I posted the CAUTION info explaining what could happen and the additional risk :thumbup1:

A simple, risk versus gain or maybe you prefer what is referred to as an "opportunity cost" LOL :spy:

6S HYDRO
04-30-2009, 05:44 PM
ill be picking up and eagle tree soon, ill post it up then we'll see whos the IDIOT:thumbsdown:

Flying Scotsman
04-30-2009, 06:20 PM
[QUOTE=6S HYDRO;87269]ill be picking up and eagle tree soon, ill post it up then we'll see whos the IDIOT:thumbsdown:[/QUOTE

I await your epistle with baited breath...remember all the specs and run time ..no saw run times:thumbup1: and if I am the idiot I will wear a shirt stating that..proudly :smile:

Douggie

6S HYDRO
04-30-2009, 06:45 PM
Ok, sounds good

Flying Scotsman
04-30-2009, 06:55 PM
N.B. The shirt will say courtesy of 6S Hyydro on his 10th run on the same setup :beerchug:

Douggie

6S HYDRO
04-30-2009, 07:13 PM
you might have to post it up as your avitar for a month or somethin :rofl:

Flying Scotsman
04-30-2009, 07:26 PM
2 weeks would be OK :smile:, but I think I may also have to :hide:

Douggie

Jeff Wohlt
04-30-2009, 08:51 PM
Cool, this is getting funny now. Seems the proof is already there.

siranger
05-01-2009, 07:50 PM
im sticking with 5s seems to run pretty good. the first couple passes are amaising fast then it seems to not be rediculous fast after about 4 hard passes. is that normal?

MAXAMUS
05-01-2009, 08:00 PM
OK iam getting all head shot here if i run 2 x 3cell lipo's in series that's 22.2v right ?
so if i run 1x 11.1v 3cell @ 4000Mah and 1x 7.4v 2cell 6400mah in series that = 5 cell but what about the volts and the Mah what does that = ?

basically my motor will only take a max of 18.5v and i have 2 sets of bats

which are 2x6400Mah 20c 2 cell
and 2x4000Mah 30c 3 cell

what safe configuration can i run them in to stay inside my motors max volt input ??
my esc is not a problem

6S HYDRO
05-01-2009, 10:15 PM
youll only be able to run 4000 mah with that setup, actually less cause you dont want to run that 3 cell all the way down

Rumdog
05-07-2009, 11:04 PM
do not mix packs of a different capacity!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Tony
05-13-2009, 01:46 AM
running 2 2s1p 4000mAh 25C now. My BJ26 seems to run faster, and longer run time as well. I'll probably stay with 4s instead going for 6s.:beerchug:

Meniscus
05-13-2009, 10:12 AM
running 2 2s1p 4000mAh 25C now. My BJ26 seems to run faster, and longer run time as well. I'll probably stay with 4s instead going for 6s.:beerchug:

I believe that with this setup, you will see a lot longer life out of your equipment. I'm glad to see that some of the caution info provided is being taken to heart.

:popcorn2: ....eagle tree info....:popcorn2: Truthfully, I'm looking forward to this shirt idea. What color is it going to be? Screenprinted or airbrushed? LMAO! For my 2 cents, I vote for pink with duck tape and a sharpie marker! :laugh:

:just-kidding:

Rusty_Noob
05-13-2009, 10:38 AM
How about cutting the series link out of the esc leads and getting 2x 5s 5000mah packs hooked in parrallel to give 10000mah 18.5v? Or for weight conscious 2x 5s 2500mah packs for 18.5v 5000mah.

krusty
05-24-2009, 11:46 PM
I tried last year to run 6s lipos it will run for awhile until it blows up!! mine did it nuked the motor, i went back to 4s and I am very happy. I run consistantly at 40 mph and trimed out for speed I have hit 44mph acording to my GPS. cheers :thumbup: