R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Reply
 
Thread Tools Search this Thread
Old 02-10-2009, 04:57 PM   #46
Tech Regular
 
ms3 Chris's Avatar
 
Join Date: Jun 2007
Posts: 364
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by whitrzac View Post
the only thing that keeps me from buying SMC batts is the wire config. I like to use bullet plugs on the batt so if a wire gets nicked or somthing I can change the harness, and batts with the wire exiting the side requires chassis mods

+1

Danny, if you see this- Are there any plans to go to non-internal wiring and the more common method of balancing (like TP, Orion, Intellect, etc)?
__________________
Chris Shieldsmith

Hot Bodies Racing www.hotbodiesonline.com
Tekin www.teamtekin.com
Team Checkpoint
ms3 Chris is offline   Reply With Quote
Old 02-10-2009, 05:32 PM   #47
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Here is my take on inboard connectors versus outboard wires and connectors.

To use inboard connectors we must use a circuit board to solder the female tubes. This means extra resistance as there will be more solder points. Connectors can get dirty and worn out so using inboard tubes means you can't replace them from time to time to keep the resistance as low as possible. The possibilty of reverse polarity is possible. So these are the negative things about inboard connectors. The positive thing is that wires can be changed and there is no external balance connector. It also looks cleaner/nicer but I don't think this is an advantage.

Outboard wires and connectors offers the racer to change his connectors to keep resistance at a minimum when needed. Reverse polarity is not possible when using a Deans or Traxxas style connector. If a racer wants the lowest possible resistance he can hardwire to the packs wires.

Our goal at SMC is to offer the best possible packs as far as performance so it really makes no sense for use to use the best possible cells and connect them in a way that will increase the IR.

We do plan on releasing EFRA/BRCA packs that will have inboard tubes as the Europeans have been using Bullet style connectors for years so Deans or Traxxas connectors will not go to well in the part of thr world.
Danny/SMC is offline   Reply With Quote
Old 02-10-2009, 05:43 PM   #48
Tech Master
 
Bulldawg RC's Avatar
 
Join Date: Feb 2007
Posts: 1,941
Trader Rating: 65 (99%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
Here is my take on inboard connectors versus outboard wires and connectors.

To use inboard connectors we must use a circuit board to solder the female tubes. This means extra resistance as there will be more solder points. Connectors can get dirty and worn out so using inboard tubes means you can't replace them from time to time to keep the resistance as low as possible. The possibilty of reverse polarity is possible. So these are the negative things about inboard connectors. The positive thing is that wires can be changed and there is no external balance connector. It also looks cleaner/nicer but I don't think this is an advantage.

Outboard wires and connectors offers the racer to change his connectors to keep resistance at a minimum when needed. Reverse polarity is not possible when using a Deans or Traxxas style connector. If a racer wants the lowest possible resistance he can hardwire to the packs wires.

Our goal at SMC is to offer the best possible packs as far as performance so it really makes no sense for use to use the best possible cells and connect them in a way that will increase the IR.

We do plan on releasing EFRA/BRCA packs that will have inboard tubes as the Europeans have been using Bullet style connectors for years so Deans or Traxxas connectors will not go to well in the part of thr world.
I personally prefer bullet connectors, IR is important but when using a deans/traxxas/tamiya plug you are adding many more connections that may not be needed and that will add resistance.

Have you tested Trakpower power against your cells? If so, how do they compare?
__________________
Bulldawg R/C Batteries and Products
Nimh and Lipo Batteries and accessories
www.BulldawgRC.com
Team Driver for: Proline, Team Epic/Trinity, Hex Crew, Bulldawg R/C, Speed Demon Hobbies ~~~~TEAM CRUNCHY~~~~
Bulldawg RC is offline   Reply With Quote
Old 02-10-2009, 06:02 PM   #49
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

There is more resistance when using inboard connectors as the circuit board adds solder points. I will try to get the difference in resistance soon as we do have circuit boards for our EFRA packs so I can try and measure the difference.

I really don't like to compare our packs to our competitors packs. The best thing to do is to try one of our packs and come to your own conclusions.
Danny/SMC is offline   Reply With Quote
Old 02-10-2009, 06:40 PM   #50
Tech Champion
 
whitrzac's Avatar
 
Join Date: May 2008
Location: WI
Posts: 5,750
Trader Rating: 96 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
There is more resistance when using inboard connectors as the circuit board adds solder points. I will try to get the difference in resistance soon as we do have circuit boards for our EFRA packs so I can try and measure the difference.

I really don't like to compare our packs to our competitors packs. The best thing to do is to try one of our packs and come to your own conclusions.
are you scared??? if the packs are as good as you say they are you should have nothing to worry about...

I for one run cheap 5000s from truerc.com its hard to beat $75 for a good lipo...
whitrzac is offline   Reply With Quote
Old 02-10-2009, 06:46 PM   #51
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by whitrzac View Post
are you scared??? if the packs are as good as you say they are you should have nothing to worry about...

I for one run cheap 5000s from truerc.com its hard to beat $75 for a good lipo...

No I'm not scared but it does me or my company no good to start talking about our competitors products.

Our 5200/24C has a street price of 85.00 which is not bad for a pack that goes through distribution.
Danny/SMC is offline   Reply With Quote
Old 02-10-2009, 06:54 PM   #52
Tech Regular
 
JEFFRO503's Avatar
 
Join Date: Apr 2005
Location: St Helen's OR
Posts: 462
Trader Rating: 9 (100%+)
Default

Isn't the SMC 4900mah saddle pack really popular for the AE B44? I read a few posts back that you didn't have any packs that fir the AE cars??....maybe i read that wrong? If those 4900 saddles fit a B44....i'll be looking into getting a couple packs.
JEFFRO503 is offline   Reply With Quote
Old 02-10-2009, 06:57 PM   #53
Tech Champion
 
whitrzac's Avatar
 
Join Date: May 2008
Location: WI
Posts: 5,750
Trader Rating: 96 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
No I'm not scared but it does me or my company no good to start talking about our competitors products.

Our 5200/24C has a street price of 85.00 which is not bad for a pack that goes through distribution.
you can find them for less too, but I still can't stand not having bullet plugs...



mabey solder posts will be the next big thing in lipo...
whitrzac is offline   Reply With Quote
Old 02-10-2009, 07:02 PM   #54
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,861
Trader Rating: 24 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
No I'm not scared but it does me or my company no good to start talking about our competitors products.

Our 5200/24C has a street price of 85.00 which is not bad for a pack that goes through distribution.
I hear you. All that would do is start a pissing contest (and maybe even legal action) and no one needs that.

Still, I bet when you test someone else's pack and it falls far short it takes a herculean effort to keep from screaming it to the world.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 02-10-2009, 07:21 PM   #55
Tech Fanatic
 
Join Date: Mar 2008
Posts: 926
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
Get me the size of the AE battery tray and what is the maximum height and I will see what I can come up with but it will have to be a softcase pack.

Danny,
thanks for considering!

The dimensions with the pads in place are as follows:

143X48X33 mm. I could remove the pads and it would add about 2 mm but its minimal. Take your time and see what you could make, and if its even economically feasable for you to make a custome pack, you have to make money too. But I bet you would sell a bunch to the AE guys.

thanks again,

Trout
__________________
I have a few RC's.
trout74 is offline   Reply With Quote
Old 02-10-2009, 07:53 PM   #56
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by JEFFRO503 View Post
Isn't the SMC 4900mah saddle pack really popular for the AE B44? I read a few posts back that you didn't have any packs that fir the AE cars??....maybe i read that wrong? If those 4900 saddles fit a B44....i'll be looking into getting a couple packs.
We don't have a 4S pack that fits the 1/8th AE conversion.

Our saddle does fit the B44 and I will try and get a picture to show how a friend of mine mounts it.
Danny/SMC is offline   Reply With Quote
Old 02-10-2009, 07:55 PM   #57
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by whitrzac View Post
you can find them for less too, but I still can't stand not having bullet plugs...



mabey solder posts will be the next big thing in lipo...
Solder posts is a good idea but would still require the use of a circuit board plus some rules now state that connectors must be used.

You can put bullet connectors on the 12 gauge wires intead of Deans .
Danny/SMC is offline   Reply With Quote
Old 02-10-2009, 07:58 PM   #58
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by rearviewmirror View Post
My SMC inventory is as follows:

2 x 2S 28C 7.4v 5000mAh
2 x 2S 24C 7.4v 5200mAh


My understanding is that the 28C uses higher quality cells. Danny, my 28C's have handwritten output results on the packaging, is that something you're doing?

I use the 28C's for Slash racing, yes, overkill, but the only electric racing I do is Slash and 2WD truck (Team AE T4). The weight of the 28C makes it perfect for the Slash and it allows that 12t to draw all the power it could ever dream of.

The 24C for the T4 is awesome, perfect weight, and when mated a Mamba Max and 5700kV there is more power than anyone could ever handle.

I would probably buy the 24C 5200's from now on, they're almost half the price of the 28c and for my applications they're still more than enough battery.

Keep up the good work SMC, you batteries really do deliver.
Our new softcase 9000/28C E-Revo pack will fit the Slash with the optional Traxxas battery mounting kit. Our sample pack has great IR and voltage. 4.8 IR and 7.51 voltage at the wires where the female Deans is soldered.
Danny/SMC is offline   Reply With Quote
Old 02-10-2009, 07:59 PM   #59
Tech Fanatic
 
Join Date: Mar 2008
Posts: 926
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
We don't have a 4S pack that fits the 1/8th AE conversion.

Our saddle does fit the B44 and I will try and get a picture to show how a friend of mine mounts it.
I posted the dimensions of the AE pack, I know its physically possible to make one, as I have one from Zippy, its just wether it will work into your business plan. And that is entirely up to you and your company. I respect your right to produce what you want. But.....if you make it, I will buy it and I bet others will too.


Trout
__________________
I have a few RC's.
trout74 is offline   Reply With Quote
Old 02-10-2009, 08:02 PM   #60
Tech Champion
 
Jason Pelletier's Avatar
 
Join Date: Jul 2007
Location: New York
Posts: 8,820
Trader Rating: 33 (100%+)
Default

I have compared my 5200/24c to the orion 3800/35c and i found they are equal to each other in punch but the 5200/24c just holds the punch forever. Ultra long runtime compared to the 3800/35c.
__________________
Island Raceway & Hobby
Jason Pelletier is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 10:03 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net