Go Back  R/C Tech Forums > General Forums > Electric On-Road
SMC 28C 4000/5000 Hardcase Lipo part 2 >

SMC 28C 4000/5000 Hardcase Lipo part 2

SMC 28C 4000/5000 Hardcase Lipo part 2

Reply

Old 12-06-2008, 07:29 PM
  #1531  
Tech Elite
iTrader: (2)
 
JimmyMac's Avatar
 
Join Date: Oct 2001
Location: NC
Posts: 4,447
Trader Rating: 2 (100%+)
Default

Originally Posted by JimmyMac View Post
Okay, here is tonights cycle after yesterdays trophy race in Arkansas at the Roar Nats track. I ran both packs all day long through practice and the qualifiers and main. Charged mainly at 8amps. But I did do some 12amp charges to get the packs done faster so I could try and heat them up under the sun and some warmers. I would say each pack maybe had 4 or 5 charges yesterday. Of course the cycle was done as normal 4amp or 4000mah rate. 35amp discharge with 180 second cool down. Blah blah blah...

4/27/08
Pack 1;
416 seconds 7.37v
4044 mAh 6.8 IR

Pack 2;
410 seconds 7.36v
3986 mAh 6.9 IR
Originally Posted by JimmyMac View Post
Okay, I did a cycle tonight. I raced Saturday. So the packs sat for a day or two without touching them. Pack 1 IR went up as expected. But Pack 2 went down. I'll cycle again tomorrow night and Pack 1 IR should drop back to normal. But I'm curious as to what Pack 2 will do. I do notice run time slowing going down. But that might be due to me charging at 12 amps. I'm gonna go to 8amp charge for racing and see what happens. Plus now I'm starting to heat up my packs after charging. Of course all my cycles are 1C at 4000mAh or 4amps. 35amp discharge with 180seconds cool down for the cycle. Packs are discharged down to 6v before cycle starts. Here's the history so far. Each packs usually get 3 runs on race day. 1~2 cycles during the week. So about 4 or 5 charges a week for each pack.

On the box,
Pack 1;
415 seconds 7.34v
4034 mAh 7.1 IR

Pack 2;
409 seconds 7.35v
3976 mAh 7.2 IR

4/8/08
Pack 1;
422 seconds 7.32v
4102 mAh 7.5 IR

Pack 2;
416 seconds 7.33v
4044 mAh 7.5 IR

4/9/08
Pack 1;
420 seconds 7.34v
4083 mAh 7.2 IR

Pack 2;
416 seconds 7.33v
4044 mAh 7.2 IR

4/13/08
Pack 1;
417 seconds 7.35v
4054 mAh 7.2 IR

Pack 2;
413 seconds 7.35v
4015 mAh 7.1 IR

4/22/08
Pack 1;
416 seconds 7.34v
4044 mAh 7.5 IR

Pack 2;
410 seconds 7.35v
3986 mAh 6.9 IR
Quoting for my reference...
JimmyMac is offline  
Reply With Quote
Old 12-06-2008, 08:17 PM
  #1532  
Tech Champion
iTrader: (42)
 
John Tag's Avatar
 
Join Date: May 2004
Location: Huntersville, NC
Posts: 8,925
Trader Rating: 42 (100%+)
Default

Holy S*** a Jimmy sighting.... I thought Glenn hid you under his rug and them Oval guys raped ya... Good to see ya back......
John Tag is offline  
Reply With Quote
Old 12-06-2008, 08:35 PM
  #1533  
Tech Initiate
 
Join Date: Nov 2007
Posts: 49
Default

Originally Posted by gonzo416 View Post
Do you know who has them in stock as I can't seem to find them anywhere?
In stock here:
http://www.nexusracing.com/product_i...oducts_id=2246
JHIH is offline  
Reply With Quote
Old 12-06-2008, 09:02 PM
  #1534  
Tech Initiate
 
Join Date: Nov 2007
Posts: 49
Default

Originally Posted by Adam? View Post
Those balancers are the same as Hyperion's LBA6, I believe. Their newer chargers are based on the LBA10, so I don't think that adapter would work. That's too bad, because I'd REALLY like an adapter just like that for the Duo. Fussing with the board is a hassle.
I think the LBA6 uses the same as the Great Planes Equinox, but definitely not the same as the Trakpower/Flightpower. The LBA10 uses a unique adapter like you said.

You can always just buy a JST-XH plug and replace the circuit board with that, right? Just cut off the circuit board, line up & connect the black end wire on the XH plug all the way to the right (the last black wire the way it plugs in) on your DUO adapter, and connect the two wires next to the black wire on the XH plug with the each of two wires to the left on the hyperion adapter that plugs into the charger. I would use a multimeter to confirm that is the correct configuration, but I'm pretty confident that would work.

In other words, the 3 wires circled in blue in the second pic below are the only ones even used for the 2S JST-XH adapter...just cut the circuit board off and solder a female JST-XH plug onto those three wires. I saw some cheap Trakpower female XH plugs also available at Nexus.

Don't let all the wires scare you ...all you need is 3 of them + the correct adapter for a 2S pack.
Attached Thumbnails SMC 28C 4000/5000 Hardcase Lipo part 2-hp-eos610duo.jpg   SMC 28C 4000/5000 Hardcase Lipo part 2-hp-lb10-xh.jpg  

Last edited by JHIH; 12-06-2008 at 09:05 PM. Reason: typo
JHIH is offline  
Reply With Quote
Old 12-06-2008, 11:54 PM
  #1535  
Tech Elite
iTrader: (2)
 
JimmyMac's Avatar
 
Join Date: Oct 2001
Location: NC
Posts: 4,447
Trader Rating: 2 (100%+)
Default

Originally Posted by John Tag View Post
Holy S*** a Jimmy sighting.... I thought Glenn hid you under his rug and them Oval guys raped ya... Good to see ya back......
Oval? What's that? Never heard of it! Some kind of new battery?
JimmyMac is offline  
Reply With Quote
Old 12-07-2008, 12:14 AM
  #1536  
Super Moderator
iTrader: (2)
 
Grizzbob's Avatar
 
Join Date: Feb 2002
Location: Sand Springs, OK
Posts: 3,065
Trader Rating: 2 (100%+)
Default

Originally Posted by gonzo416 View Post
Do you know who has them in stock as I can't seem to find them anywhere?
Gonzo, try here: http://www.speedtechrc.com/store/ebp...id=596&id=7445
Grizzbob is offline  
Reply With Quote
Old 12-07-2008, 02:13 PM
  #1537  
Company Representative
Thread Starter
iTrader: (2)
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

JimmyMac: Thanks for the cycle results and info.
Danny/SMC is offline  
Reply With Quote
Old 12-07-2008, 03:08 PM
  #1538  
Tech Adept
 
Join Date: Apr 2008
Location: Melbourne, Australia
Posts: 237
Default

I recently ordered the 5000 28C with deans connector and got the dark carbon look case with top exit leads (which i prefer), once i confirmed a fit to my TC i then ordered a second but this time the traxxas connector (deans was out of stock) and got the red case with side exit leads.

Danny can you please confirm the part number i need to order to get the dark carbon look case 5000mah 28C with any connector?

I dunno about others but i really prefer the top exit cases.

Thanks!

Last edited by gameover; 12-07-2008 at 03:22 PM.
gameover is offline  
Reply With Quote
Old 12-07-2008, 03:17 PM
  #1539  
Company Representative
Thread Starter
iTrader: (2)
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Our top exit packs have the same part numbers as it's just a change in wires and look of the case. You need to ask when you order what style the store you buy from has. We have been shipping top wires cases only since ealry September.
Danny/SMC is offline  
Reply With Quote
Old 12-07-2008, 08:54 PM
  #1540  
Tech Elite
iTrader: (2)
 
JimmyMac's Avatar
 
Join Date: Oct 2001
Location: NC
Posts: 4,447
Trader Rating: 2 (100%+)
Default

I should have my results posted late late tonight or sometime tomorrow. So far IR is way up and voltage is down, but reversing with each cycle. I put 3 cycles on them last night. Tonight I'm gonna put 3 more.
JimmyMac is offline  
Reply With Quote
Old 12-07-2008, 10:27 PM
  #1541  
Company Representative
Thread Starter
iTrader: (2)
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Do you have the cycle numbers of when you stored them and how long did they stay stored ? I have heard from some that have left packs sit for a long period of time that the IR goes up and that means voltage will be down. Racers using there packs regularly don't seem to seeing this. So I believe it's best if the packs get stored with no charge and cycled once in awhile to make sure the voltage of the cells doesn't go under 3 volts.
Danny/SMC is offline  
Reply With Quote
Old 12-07-2008, 10:32 PM
  #1542  
Tech Master
iTrader: (1)
 
Join Date: Jul 2004
Location: MI
Posts: 1,544
Trader Rating: 1 (100%+)
Default

Originally Posted by JHIH View Post
I think the LBA6 uses the same as the Great Planes Equinox, but definitely not the same as the Trakpower/Flightpower. The LBA10 uses a unique adapter like you said.

You can always just buy a JST-XH plug and replace the circuit board with that, right? Just cut off the circuit board, line up & connect the black end wire on the XH plug all the way to the right (the last black wire the way it plugs in) on your DUO adapter, and connect the two wires next to the black wire on the XH plug with the each of two wires to the left on the hyperion adapter that plugs into the charger. I would use a multimeter to confirm that is the correct configuration, but I'm pretty confident that would work.

In other words, the 3 wires circled in blue in the second pic below are the only ones even used for the 2S JST-XH adapter...just cut the circuit board off and solder a female JST-XH plug onto those three wires. I saw some cheap Trakpower female XH plugs also available at Nexus.

Don't let all the wires scare you ...all you need is 3 of them + the correct adapter for a 2S pack.
Wouldn't it be nice if every one used the same connectors?
John St.Amant is offline  
Reply With Quote
Old 12-08-2008, 02:03 AM
  #1543  
Tech Elite
iTrader: (2)
 
JimmyMac's Avatar
 
Join Date: Oct 2001
Location: NC
Posts: 4,447
Trader Rating: 2 (100%+)
Default

Originally Posted by Danny/SMC View Post
Do you have the cycle numbers of when you stored them and how long did they stay stored ? I have heard from some that have left packs sit for a long period of time that the IR goes up and that means voltage will be down. Racers using there packs regularly don't seem to seeing this. So I believe it's best if the packs get stored with no charge and cycled once in awhile to make sure the voltage of the cells doesn't go under 3 volts.
My quote at the top of the page was my last cycle before I stored them with 1000mah put back into them. That was back in 4/27/2008 according to the post. They haven't been touched until this past weekend... 12/04/2008. So that's over 7 months worth of storage without ever touching or even acknowledging the packs existence.

Of course I don't suggest this to anyone. But I was just curious what the outcome would be. I'm sure you would be curious too. I don't plan on racing anytime soon. But I wanted to cycle them anyways. Now that I have my equipment unpacked, I'll continue to cycle them every week and see what happens. If I do start racing again (maybe spring time), I'll probably buy a 5000 pack from ya.

If these were nimh pack, they'd be in the garbage. No questions asked. Anyways, I'll post my numbers later tonight (Monday).
JimmyMac is offline  
Reply With Quote
Old 12-08-2008, 10:31 PM
  #1544  
Tech Master
iTrader: (50)
 
CRCDUDE's Avatar
 
Join Date: Feb 2008
Posts: 1,092
Trader Rating: 50 (100%+)
Default

Gotta dumb question??

How can i calculate my average voltage the same as calculated by SMC/Danny.

Do you read the volts every 60 sec and average the whole discharge cycle ?
Or read the highest and lowest ?divide by 2 ?

I just got my GFX back from Lipo update and wanna be sure Im checking my stuff out right
CRCDUDE is offline  
Reply With Quote
Old 12-08-2008, 10:59 PM
  #1545  
Tech Elite
iTrader: (13)
 
ottoman's Avatar
 
Join Date: Oct 2001
Location: wisconsin
Posts: 2,761
Trader Rating: 13 (100%+)
Default

Originally Posted by CRCDUDE View Post
Gotta dumb question??

How can i calculate my average voltage the same as calculated by SMC/Danny.

Do you read the volts every 60 sec and average the whole discharge cycle ?
Or read the highest and lowest ?divide by 2 ?

I just got my GFX back from Lipo update and wanna be sure Im checking my stuff out right
Uh... just cycle them on your GFX and read the average voltage numbers... it gives you the IR and ave. voltage
ottoman is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service