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-   -   Project High Voltage (https://www.rc-monster.com/forum/showthread.php?t=4777)

coolhandcountry 01.14.2007 12:35 PM

OK! test run 1 with 6s went ok. I found a small problem and fixed it.
Test run 2 9s went well. Had a smile on face with all the power it had.
Was very pleased. Next step is 12s limn.
Has me worried about the ubec. The man said it will be ok with switch.
I am willing to test it for him. No vid yet. 9s in power is awesome.
Speed seems very well. Will let know more after 12s test and vid to follow.

Serum 01.14.2007 01:07 PM

Wicked Leroy!! you speed freak!! Can you post some pics of the current setup?

BrianG 01.14.2007 01:10 PM

Are you getting some type of current/voltage measurements at the various pack sizes?

coolhandcountry 01.14.2007 01:13 PM

sure can rene.
here is lay out now.
http://i107.photobucket.com/albums/m...02/gtx2008.jpg
Here is with 12s limn on it.
http://i107.photobucket.com/albums/m...02/GTX2007.jpg
here is with stock body on it.
http://i107.photobucket.com/albums/m...02/GTX2005.jpg
Here is pic of top view of lipo lay out.
http://i107.photobucket.com/albums/m...02/GTX2004.jpg

coolhandcountry 01.14.2007 01:20 PM

Quote:

Originally Posted by BrianG
Are you getting some type of current/voltage measurements at the various pack sizes?

I have no way to measure at this time brian.

Serum 01.14.2007 01:24 PM

That's one big LOAD of lipo's Leroy!!! LOL!! what motor where you using? the 1950/10?

That's one CLEAN ride! so unLeroyish.. :p

Very nice!!!

Mike.L 01.14.2007 01:27 PM

yeah its lookin sweet nice job leroy!

jhautz 01.14.2007 01:41 PM

Sweet!!!

Is that a Novak HV heatsink on a 1950? I like it! I wish you could get some measrements on the amp draw with the different voltages. That could really paint a picture of what happens in real life over a wide range of voltages with similar loads. Could be a good education of all of us.

Sylvester 01.14.2007 01:42 PM

Very nice leroy!

Nice limn tacos! :)

Yes jhautz, they are hv sinks.

coolhandcountry 01.14.2007 01:50 PM

Well test 3 was failure.
The spektrum has a bad habit of fail safe going back to the stock settings.
Stock settings cause the bk to hit wide open reverse for a split sec.
It did fine on the 9s but 12s is bad.
I had it all hooked up and no smoke which was good.
I turend the switch on and it went wide open reverse.
The motor spun up so fast the tires wouldn't keep up.
It took all the teeth right off the spur.
The tires was not on ground. I have to fix spektrum problem first.

Sylvester 01.14.2007 01:51 PM

I bet 12s will be a massive amount of torque.. What spur were you using ; ofna?

I think it may be your receiver that is the problem..

coolhandcountry 01.14.2007 02:07 PM

I have had this problem before with different rx.
It does it mainly with the bk for they don't have a lag like
quark or schulze. They wait to find the signal.
Bk is plug has signal and ready.
when fail safe is saying reverse or brake it tries to.

Sylvester 01.14.2007 02:23 PM

Are you using a switch between the UBEC and receiver?

crazyjr 01.14.2007 04:00 PM

Quote:

Originally Posted by coolhandcountry
Well test 3 was failure.
The spektrum has a bad habit of fail safe going back to the stock settings.
Stock settings cause the bk to hit wide open reverse for a split sec.
It did fine on the 9s but 12s is bad.
I had it all hooked up and no smoke which was good.
I turend the switch on and it went wide open reverse.
The motor spun up so fast the tires wouldn't keep up.
It took all the teeth right off the spur.
The tires was not on ground. I have to fix spektrum problem first.

Now that is some NASTY power

Serum 01.14.2007 04:05 PM

What LVC are you using?

Note to myself; don't buy a spektrum.. Leaves the Nomadio open as an alternative..

coolhandcountry 01.14.2007 08:36 PM

I am using a li saver car version. Batts was fresh off charge so know that is
not problem. I had the same problem before with nimh and 6s with bk.
I don't experence problem with schulze or quark. Can't remember for mgm.

cemetery gates 01.14.2007 08:45 PM

Sweet! Must be a blast to drive on 9s, totally uncontrollable on 12s!

Vids are a must!

Bye:018:

coolhandcountry 01.14.2007 08:46 PM

Quote:

Originally Posted by Sylvester
Are you using a switch between the UBEC and receiver?

Yes. If I don't I still have same problem. I ran one with no switch.
It was recommended by the ubec people.
I need to stop the esc from coming on with the rx.
Is there a way to wire another switch to it.

sjcrss 01.14.2007 09:37 PM

nice IM in the background....hehehehe, i wonder who it belongs too, also nice truck leroy

Sylvester 01.14.2007 10:04 PM

Quote:

Originally Posted by Serum
Note to myself; don't buy a spektrum.. Leaves the Nomadio open as an alternative..

Why? Ive never had a problem with it..

crazyjr 01.14.2007 11:10 PM

I can set throttle position on my Nomadio, so i'm going to try it and see if it will work

Promod 01.14.2007 11:58 PM

I run the spektrum on all my trucks and never had that problem. All my speed controls do have reverse disabled.

Thank you,
Promod

crazyjr 01.15.2007 02:34 AM

I have setup my G2R with a Nomadio tranciever and set the failsafe for neutral and full left, in event of a failure of signal. I will play with it as often as i can and test its ability to hold position. Will let all know from time to time how it works

coolhandcountry 01.29.2007 01:06 PM

Ok. I went with forward and brake no reverse on esc. It tested out good. Even
the 40volt ubec survived. It was ended by spur gear problems again.
Well I did get a short vid. Most of vid was no where near wide open.
Hard to drive for power it has. I like it. :)
http://i107.photobucket.com/albums/m...tx212slimn.jpg

sjcrss 01.29.2007 01:12 PM

cool video CHC, nice work

neweuser 01.29.2007 01:13 PM

WOW, that thing is HUGE!!! Very nice CHC!!!!! Great job! :)

Promod 01.29.2007 01:17 PM

Looks good!!! Any heat issues? I just bought a 36150. Can't let you have all the fun:027: .

Thank you,
Promod

jhautz 01.29.2007 02:45 PM

Looks good.

any idea as to how many amps you were pulling on that 12s setup?

Superbasher 01.29.2007 04:07 PM

Not been on in a while, came on again and saw this, AAAAHHHHH! thats kinda scary.

coolhandcountry 01.29.2007 04:14 PM

I don't have nothing to tell on the amp draw. The gearing was 16 51 with the 4.3 diffs. It comes out to run about 55mp or so. I had no heating issues what so ever. My hands was cold and the motor felt just warm to them. I have to
test more later. I need to put another spur on it. Is there better spurs to hold the power. I have to get a video of it on the porch rail. You can make
the truck jump with bump of throttle. If I could have got to full speed or
even full throttle in video I would have been alot faster and more power.
First part was about 1/3.

Sylvester 01.29.2007 05:56 PM

WOW leroy! That is some crazy power you got there! I cant wait to see some WOT runs! :)

Nick 01.29.2007 06:01 PM

Really like it Leroy.

Very, good work. :)

hyperasus 01.29.2007 06:19 PM

I like. If you ever run the batteries out on one run then be sure and let us know your runtime. 12s must be giving very good runtimes to go with that insane power.

Aragon 01.29.2007 06:34 PM

I would love to see a power graph of your setup. IMHO this is the way of the future for large car conversions. :)

Sylvester 01.29.2007 06:37 PM

Next step for leroy is 12s lipo 12000mah:)

Bomb-Proof 01.29.2007 06:51 PM

The batteries are the biggest deal right now...if those were cheaper I am sure we could build our own esc, or beef up a mamba for higher voltage.

Mike.L 01.29.2007 06:55 PM

wow, you shure have alot of land around you. id make huge jumps with all that room.

Aragon 01.29.2007 07:17 PM

Quote:

Originally Posted by Bomb-Proof
The batteries are the biggest deal right now...if those were cheaper I am sure we could build our own esc, or beef up a mamba for higher voltage.

I think if anything the ESC and charger are the biggest issues. If you take a HV setup you don't need as large a capacity pack as a low voltage setup. For instance, a 4S4P 8000 mah pack versus a 12S1P 2000 mah pack. The 12S pack is 12 lipo cells versus 16 for the 4S pack. So it'll work out cheaper, lighter, and probably pack more punch.

But then you need atleast a 6S charger...

jnev 01.29.2007 07:37 PM

Its looking awesome CHC. It has got to be such a blast to drive. about what kind of speeds do you think you are hitting on that set up?

Edit: Oops - just found that you couldn't go full speed or run the whole battery.

crazyjr 01.29.2007 07:48 PM

Quote:

Originally Posted by Aragon
I would love to see a power graph of your setup. IMHO this is the way of the future for large car conversions. :)

I have an eagletree micro, it says it can do 45v, but not sure about 50+

Edtit: I found out the car version of the big eagle tree has expansion packs for 50v and 70 v, http://eagletreesystems.com/Car/car.html, you have to scroll down to see them, about 1/2 to 3/4 of the page


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