R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 11-23-2008, 11:35 PM   #136
Tech Addict
 
Join Date: Jun 2005
Location: Halifax, Nova Scotia, Canada
Posts: 708
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
I don't think you need to use a regulator as most of the gas guys run Lipo reciever packs with no regulator.
The Spektrum Pro receivers (I think!) can handle an unregulated LiPo rx pack however you must be careful with how much power you're sending to the servo. Many of the 8th scale servo's are ok with the extra voltage because they're pretty heavy duty to begin with. I believe Ko and a few other have come out with unregulated LiPo approved servos that are meant to hand;e the extra voltage. I'm not sure how the small servo's we use will respond to the extra though...
adam lancia is offline   Reply With Quote
Old 11-24-2008, 09:01 AM   #137
Tech Addict
R/C Tech Charter Subscriber
 
Join Date: Oct 2003
Location: Indiana
Posts: 579
Trader Rating: 8 (100%+)
Send a message via AIM to acyrier
Default

I have the futaba 9550 mini-servo (I think that's the number) works fine w/losi lipo pack for hte micro-cars. been using it for a year.
acyrier is offline   Reply With Quote
Old 11-24-2008, 09:26 AM   #138
Tech Addict
 
Join Date: Jun 2005
Location: Halifax, Nova Scotia, Canada
Posts: 708
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by acyrier View Post
I have the futaba 9550 mini-servo (I think that's the number) works fine w/losi lipo pack for hte micro-cars. been using it for a year.
That sucka must be fast as all get out! Good to know the little ones can take the extra voltage as well. I suppose they're not under the same amount of stress as the ones in 8th scale.
adam lancia is offline   Reply With Quote
Old 11-24-2008, 12:50 PM   #139
Tech Elite
 
KHoff7's Avatar
 
Join Date: Jan 2007
Posts: 3,166
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Danny/SMC View Post
From what I heard the new KO will work and yes someone should try a GTB with switch at off and Novak told me you can keep the red wire plugged in the reciever.
I wired this setup into my car and left the esc turned off and it works. I will find out tomorrow if it lasts 8 minutes.
__________________
Awesomatix USA / Middle River Hobbies / Sweep / Psycho Cells Racing
Karl Hoffmeister
KHoff7 is offline   Reply With Quote
Old 11-24-2008, 03:51 PM   #140
Tech Fanatic
 
Nexus Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2005
Posts: 848
Default

Below is a video of our 1/12 A-main on Saturday, and the magenta car (Danny) is running the SMC 3.7V Lipo with a 13.5 for the full 8 minutes against a full main of 4cell 17.5 cars.

He ran a LRP 13.5, LRP TC-Spec ESC, 300mah Lipo receiver pack, and no regulator. We tried removing the red wire from the ESC like KHoff mentioned, but then nothing worked at all. The car did NOT work well with a 5cell NiMH pack, it started to get the "dumping" feeling after less than 5 minutes.

With the Lipo Rx pack, the car lasted the full 8 minutes and did not drop off much. You can see on the last lap that he is right behind the leader (the green car), and they are running the same speed. In fact, the lap times of the NiMH cars dropped off more than his Lipo car.

About 250mah was drained from the 300mah Lipo Rx pack during a run.

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
__________________
NEXUSRACING.com
Nexus Racing is offline   Reply With Quote
Old 11-24-2008, 04:09 PM   #141
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,780
Trader Rating: 88 (99%+)
Default

Quote:
Originally Posted by KHoff7 View Post
Ran it today. 13.5 single cell is exactly the same until the cutoff kicks in. I played with gearing to get it to last the whole run. I got to end up being a little bit off pace through the run but not hitting the cutoff until the last 20 seconds. I think once the booster curciut is available it will be perfect.
Exactly the same as 13.5 4-cell? And do you mean the feel or the lap times or both?

Thanks
Chris
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 11-24-2008, 04:33 PM   #142
Tech Elite
 
KHoff7's Avatar
 
Join Date: Jan 2007
Posts: 3,166
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by chris moore View Post
Exactly the same as 13.5 4-cell? And do you mean the feel or the lap times or both?

Thanks
Chris
Lipo single cell 13.5= 4 cell nimh 17.5

And yes I would say the same feel is there along with laptimes.
__________________
Awesomatix USA / Middle River Hobbies / Sweep / Psycho Cells Racing
Karl Hoffmeister
KHoff7 is offline   Reply With Quote
Old 11-24-2008, 04:35 PM   #143
Tech Elite
 
KHoff7's Avatar
 
Join Date: Jan 2007
Posts: 3,166
Trader Rating: 4 (100%+)
Default

Nexus,
With your setup did you leave the esc switched off or on?
__________________
Awesomatix USA / Middle River Hobbies / Sweep / Psycho Cells Racing
Karl Hoffmeister
KHoff7 is offline   Reply With Quote
Old 11-24-2008, 04:46 PM   #144
Tech Master
 
sportpak's Avatar
 
Join Date: Oct 2006
Location: Ft Wayne, IN
Posts: 1,314
Trader Rating: 26 (100%+)
Default

Regulator vs no regulator. Nimh receiver pack vs lipo receiver pack. Dumping with vs dumping without. Either answer has been observed.

Jesus, what a mess we've gotten ourselves into.....
__________________
-Tamiya TA05-R - Tamiya M05 - Summit Raceway Ft. Wayne, IN

www.summitrcraceway.com
sportpak is offline   Reply With Quote
Old 11-24-2008, 05:04 PM   #145
Tech Elite
 
KHoff7's Avatar
 
Join Date: Jan 2007
Posts: 3,166
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by sportpak View Post
Regulator vs no regulator. Nimh receiver pack vs lipo receiver pack. Dumping with vs dumping without. Either answer has been observed.

Jesus, what a mess we've gotten ourselves into.....
Its not a mess its called testing. Next we tell you what works and what combo to use and all is well.
__________________
Awesomatix USA / Middle River Hobbies / Sweep / Psycho Cells Racing
Karl Hoffmeister
KHoff7 is offline   Reply With Quote
Old 11-24-2008, 05:53 PM   #146
Tech Master
 
sportpak's Avatar
 
Join Date: Oct 2006
Location: Ft Wayne, IN
Posts: 1,314
Trader Rating: 26 (100%+)
Default

Quote:
Originally Posted by KHoff7 View Post
Its not a mess its called testing. Next we tell you what works and what combo to use and all is well.
I know, I know... It just hasn't been real consistent yet.
__________________
-Tamiya TA05-R - Tamiya M05 - Summit Raceway Ft. Wayne, IN

www.summitrcraceway.com
sportpak is offline   Reply With Quote
Old 11-24-2008, 05:54 PM   #147
Tech Elite
 
KHoff7's Avatar
 
Join Date: Jan 2007
Posts: 3,166
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by sportpak View Post
I know, I know... It just hasn't been real consistent yet.
I agree but were getting closer.
__________________
Awesomatix USA / Middle River Hobbies / Sweep / Psycho Cells Racing
Karl Hoffmeister
KHoff7 is offline   Reply With Quote
Old 11-24-2008, 06:10 PM   #148
Tech Champion
 
hanulec's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2007
Location: @ the post office
Posts: 8,562
Trader Rating: 27 (100%+)
Default

Quote:
Originally Posted by Nexus Racing View Post
About 250mah was drained from the 300mah Lipo Rx pack during a run.
wow - I'm surprised so much juice was drained from the receiver pack. i picked up a 200mah Lipo from Top to run w/ my lipo pack. maybe i need to get a larger pack.

as a note, the Top lipos are much cheaper than others I've seen:
http://www.topracingusa.com/batteries.htm
__________________
FJ / ROAR #2-122945 / MaxRotation FPV Drone Racing / [email protected] Awesomatix USA / Wild Turbo Fan / Mon-Tech Racing / RocheRC USA / Side Piece /
LRP / John's BSR Tires / TeamEAM / TQ Wire / R1 / Team Scream / PCR / MIX
RacerLog wiki Awesomatix A700 / 2wd offroad 4 life
hanulec is offline   Reply With Quote
Old 11-24-2008, 06:47 PM   #149
Ike
Tech Master
 
Ike's Avatar
 
Join Date: Jan 2004
Posts: 1,131
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Nexus Racing View Post
Below is a video of our 1/12 A-main on Saturday, and the magenta car (Danny) is running the SMC 3.7V Lipo with a 13.5 for the full 8 minutes against a full main of 4cell 17.5 cars.

He ran a LRP 13.5, LRP TC-Spec ESC, 300mah Lipo receiver pack, and no regulator. We tried removing the red wire from the ESC like KHoff mentioned, but then nothing worked at all. The car did NOT work well with a 5cell NiMH pack, it started to get the "dumping" feeling after less than 5 minutes.

With the Lipo Rx pack, the car lasted the full 8 minutes and did not drop off much. You can see on the last lap that he is right behind the leader (the green car), and they are running the same speed. In fact, the lap times of the NiMH cars dropped off more than his Lipo car.

About 250mah was drained from the 300mah Lipo Rx pack during a run.

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.

250 mah being used leads me to believe that the pack was doing a good deal more than what a typical RX pack would. I believe 60ish mah is typical.
Ike is offline   Reply With Quote
Old 11-24-2008, 07:41 PM   #150
Tech Addict
 
Join Date: Mar 2008
Posts: 649
Trader Rating: 1 (100%+)
Default

I used to charge more than 90mAh into a receiver pack when I ran a digital servo in 12th. It all depends on the track, car, and driver.
Fred_B is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
The future of 1/12 scale Roland S Electric On-Road 1004 06-16-2017 02:04 PM
SMC 5700mAh 25C Single Cell Lipo Danny/SMC Electric On-Road 352 05-14-2009 04:03 AM
Trackside 1/12th scale racing Ike Wisconsin & Illinois Racing 41 03-31-2009 11:42 AM
ROAR 1/12 weight limit miller tyme Electric On-Road 171 01-09-2009 04:14 PM
Why choose LiPo? wingman2 Electric On-Road 16 12-17-2008 06:51 PM
1/12 lipo the mighty thor Electric On-Road 7 12-07-2008 03:01 PM



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 06:33 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