Go Back  R/C Tech Forums > General Forums > Electric On-Road
1/12 T-Bar cars with 1s saddle packs >

1/12 T-Bar cars with 1s saddle packs

1/12 T-Bar cars with 1s saddle packs

Reply

Old 02-19-2017, 03:49 PM
  #1  
Tech Rookie
Thread Starter
 
Join Date: Feb 2017
Posts: 11
Default 1/12 T-Bar cars with 1s saddle packs

So I pulled out my serpent s120 this weekend and found that is still fun (of course it is) so i was looking at how i could fit a 1s lipo in it in order to go racing

Of course a standard 1s brick will not fit whatsoever without compromising balance.
There used to be a 1s saddle specifically for 12th scale cars but i cant find them right now.

But what if you take a 2s saddle pack and instead of wiring the two packs in series, you just connect them in parallel?
Then you'd have 3.7V....kinda like a pseudo 1S saddle LiPo.

Anybody tried that before?

Last edited by Obstsalat; 02-19-2017 at 04:38 PM.
Obstsalat is offline  
Reply With Quote
Old 02-19-2017, 06:35 PM
  #2  
Tech Fanatic
 
Join Date: Sep 2010
Location: Chicagoland
Posts: 822
Default

1s2p is a common thing.
Nerobro is offline  
Reply With Quote
Old 02-19-2017, 08:50 PM
  #3  
Tech Elite
iTrader: (90)
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,816
Trader Rating: 90 (99%+)
Default

Check the size, from what I've read before those 2s packs are much taller which makes fitting the body more difficult. Speedzone is who made the 1s saddle pack before, you might want to check with them and see if they still have any.
chris moore is offline  
Reply With Quote
Old 02-19-2017, 09:48 PM
  #4  
Tech Addict
iTrader: (46)
 
Join Date: Oct 2008
Location: Spokane, WA
Posts: 679
Trader Rating: 46 (100%+)
Default

Originally Posted by Obstsalat View Post

But what if you take a 2s saddle pack and instead of wiring the two packs in series, you just connect them in parallel?
Then you'd have 3.7V....kinda like a pseudo 1S saddle LiPo.

Anybody tried that before?
That's exactly (not pseudo) what the old Speedzone 1s saddle pack was - 1s2p.
biz77 is offline  
Reply With Quote
Old 02-19-2017, 11:33 PM
  #5  
Tech Regular
iTrader: (24)
 
Join Date: Feb 2015
Location: Ankeny, IA
Posts: 444
Trader Rating: 24 (100%+)
Default

Originally Posted by biz77 View Post
That's exactly (not pseudo) what the old Speedzone 1s saddle pack was - 1s2p.
Came here to post this!
fenton06 is offline  
Reply With Quote
Old 02-20-2017, 06:37 AM
  #6  
Tech Apprentice
iTrader: (4)
 
Join Date: Jan 2015
Location: East Texas
Posts: 50
Trader Rating: 4 (100%+)
Default

Check out this thread:

http://www.rctech.net/forum/electric...-pan-cars.html

Has some more info on t-plate cars.
tim_s is offline  
Reply With Quote
Old 02-20-2017, 07:01 AM
  #7  
Tech Rookie
Thread Starter
 
Join Date: Feb 2017
Posts: 11
Default

That's exactly (not pseudo) what the old Speedzone 1s saddle pack was - 1s2p.
Thing is: 2S sadle packs are 1s3p....not 1s2p

Idk what those numbers stand for, but I'm pretty sure its not the same
Obstsalat is offline  
Reply With Quote
Old 02-20-2017, 07:46 AM
  #8  
Tech Regular
 
Join Date: Oct 2008
Location: Framingham, MA
Posts: 369
Default

Originally Posted by Obstsalat View Post
Thing is: 2S sadle packs are 1s3p....not 1s2p

Idk what those numbers stand for, but I'm pretty sure its not the same
Not really, they are 2 separate 1S packs with 4mm banana plugs. You can wire them parallel as 11,400mah @3.7V or series with 5700 mah @7.4V
http://www.genstattu.com/gens-ace-57...nana-plug.html
Eddie_E is offline  
Reply With Quote
Old 02-20-2017, 11:39 AM
  #9  
Tech Addict
iTrader: (46)
 
Join Date: Oct 2008
Location: Spokane, WA
Posts: 679
Trader Rating: 46 (100%+)
Default

Originally Posted by Obstsalat View Post
Thing is: 2S sadle packs are 1s3p....not 1s2p

Idk what those numbers stand for, but I'm pretty sure its not the same
The S stands for series and the P for parallel. Wiring in series increases the voltage based on the number of cells. Wiring in parallel increases the capacity based on the number of cells.
For example you have 2 single cell LiPos of 3.7 volts nominal and 4,000 mAH each.

Parallel wiring:
Cell 1 Cell2
(+)--------(+) this is your positive
(-)---------(-) this is your negative

This will give you 3.7 volts nominal and 8,000 mAH of capacity. This is 1s2p.

Series wiring of the same cells:
Cell 1
(+)-----------------------------------------This is your positive
(-)-------(+) Positive of cell 2
(-)--------------------------------This is your negative
Cell 2
This will give you 7.4 volts nominal and 4,000 mAH of capacity. This is 2s1p.

The 3P indicates 3 cells in parallel to get the capacity required. It could be a 1p, 2p, 3p etc. The voltage will stay the same.

Last edited by biz77; 02-20-2017 at 12:13 PM.
biz77 is offline  
Reply With Quote
Old 02-20-2017, 12:49 PM
  #10  
Tech Rookie
Thread Starter
 
Join Date: Feb 2017
Posts: 11
Default

Originally Posted by biz77 View Post
The S stands for series and the P for parallel. Wiring in series increases the voltage based on the number of cells. Wiring in parallel increases the capacity based on the number of cells.
For example you have 2 single cell LiPos of 3.7 volts nominal and 4,000 mAH each.

Parallel wiring:
Cell 1 Cell2
(+)--------(+) this is your positive
(-)---------(-) this is your negative

This will give you 3.7 volts nominal and 8,000 mAH of capacity. This is 1s2p.

Series wiring of the same cells:
Cell 1
(+)-----------------------------------------This is your positive
(-)-------(+) Positive of cell 2
(-)--------------------------------This is your negative
Cell 2
This will give you 7.4 volts nominal and 4,000 mAH of capacity. This is 2s1p.

The 3P indicates 3 cells in parallel to get the capacity required. It could be a 1p, 2p, 3p etc. The voltage will stay the same.


oh I see. So if the 2S saddle pack lipo says: 2x 3.7V 1s3p that means each block consists of 3 batteries in order to get the 5600mah, but each block still has only 3.7V
Obstsalat is offline  
Reply With Quote
Old 02-20-2017, 12:51 PM
  #11  
Tech Elite
iTrader: (73)
 
Metalsoft's Avatar
 
Join Date: Jun 2009
Location: Nashville, TN
Posts: 2,058
Trader Rating: 73 (100%+)
Default

To the OP

Speedzone 1S Pro 5200 mAh 3.7v 50C Saddle Lipo [SZ5200PROSD1S] - $59.95


I used these in my 12L4
Metalsoft is offline  
Reply With Quote
Old 02-20-2017, 12:56 PM
  #12  
Tech Rookie
Thread Starter
 
Join Date: Feb 2017
Posts: 11
Default

not available in germany :/ they dont have a distributor in the EU..now that the UK left us
Obstsalat is offline  
Reply With Quote
Old 02-20-2017, 12:59 PM
  #13  
Tech Elite
iTrader: (73)
 
Metalsoft's Avatar
 
Join Date: Jun 2009
Location: Nashville, TN
Posts: 2,058
Trader Rating: 73 (100%+)
Default

Originally Posted by Obstsalat View Post
not available in germany :/ they dont have a distributor in the EU..now that the UK left us
That sucks.....
Metalsoft is offline  
Reply With Quote
Old 02-20-2017, 01:18 PM
  #14  
Tech Addict
iTrader: (46)
 
Join Date: Oct 2008
Location: Spokane, WA
Posts: 679
Trader Rating: 46 (100%+)
Default

Originally Posted by Obstsalat View Post
oh I see. So if the 2S saddle pack lipo says: 2x 3.7V 1s3p that means each block consists of 3 batteries in order to get the 5600mah, but each block still has only 3.7V
Yep! Each hard case would contain 3 individual cells wired in parallel for the total capacity. In your case 5,600mah. That means each individual cell inside the case would be 5,600/3 = ~1867mah. You wire two of those together in series to get a 2s3p of 7.4 nominal volts with 5,600 mah of capacity.
biz77 is offline  
Reply With Quote
Old 02-23-2017, 10:54 AM
  #15  
Tech Elite
iTrader: (2)
 
Join Date: Jan 2003
Location: lost...
Posts: 2,864
Trader Rating: 2 (100%+)
Default

Originally Posted by Metalsoft View Post
I'm interested how you mounted the batteries since the chassis has large battery slots for the inserts.
RoyU is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Terms of Service