Go Back  RCU Forums > RC Cars, Buggies, Trucks, Tanks and more > RC Giant Scale Cars
Reload this Page >

Introducing the RAMTech-RC Kill Switch

Notices
RC Giant Scale Cars For all those who love driving large scale rc cars share your projects or ask questions here.

Introducing the RAMTech-RC Kill Switch

Old 10-19-2013, 11:46 AM
  #1  
RAMTech-HBF-LSF
Thread Starter
 
Join Date: Nov 2007
Location: Chandler, AZ
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Default Introducing the RAMTech-RC Kill Switch

Alright folks, using my monthly adspace. There is a new Kill Switch on the market. I have been working with a Chinese Engineer to make a Generic kill switch for 2 cycle engines. We are on version #3 already for this latest shipment. After several months of trials, I have found a happy medium between cost and functions.


RAMTech-RC Generic Kill Switch


** This kill switch can be used on any 2 cycle engine to shut down the coil using etiher a 2 channel or 3 channel radio.


** 2 channel radios can remotely kill the engine by turning off the transmitter.


** 3 channel radios can remotely kill the engine by the 3rd channel button.


** Low voltage cut-off is 3.0 Volts to kill the engine.


** Range glitches will kill the engine.


Cost is $24.99. But this weekend only, I will give early adopters a 25% discount for trying it out and letting us know what radio you are using.


I have not done any type of user manual, nor will I be doing technical seminars on how to set up your 3rd channel radio. Its a very basic kill switch, so common sense is all that is really needed. And good radio gear of course.




Old 10-19-2013, 03:26 PM
  #2  
Lars from Norway
 
Lars from Norway's Avatar
 
Join Date: Jun 2008
Location: Norheimsund, NORWAY
Posts: 3,158
Likes: 0
Received 1 Like on 1 Post
Default

I like the news! Reasonably priced too. But cut off on 3 volts, isn't that a bit low? No (or very few) radiosystems will work properly under 5 or maybe 4,5 volts, at this point the servos will be very slow in large scale cars with high drainage with big servos so i think the cut off should be set to around 5 volts instead.
Old 10-19-2013, 03:42 PM
  #3  
RAMTech-HBF-LSF
Thread Starter
 
Join Date: Nov 2007
Location: Chandler, AZ
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Default

If you see your servos slowing down, bring it in and recharge. Depending on the load at the moment it will shut off somewhere around 3.0 to 3.5 volts. If you are just idling, it will shut off at 3.0 for safety.
Old 10-23-2013, 12:18 AM
  #4  
splcrazy
Senior Member
 
Join Date: Aug 2006
Location: somewhere
Posts: 3,237
Likes: 0
Received 0 Likes on 0 Posts
Default

will it work on futaba 4ch radios ?
Old 10-23-2013, 05:59 AM
  #5  
RAMTech-HBF-LSF
Thread Starter
 
Join Date: Nov 2007
Location: Chandler, AZ
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Default

Yes, all Futabas will work well. I prefer the Futaba 3pm-x myself.
Old 11-10-2013, 03:07 PM
  #6  
RAMTech-HBF-LSF
Thread Starter
 
Join Date: Nov 2007
Location: Chandler, AZ
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Default

http://www.youtube.com/watch?v=1IZWxdrbTvg
Old 11-11-2013, 05:25 AM
  #7  
Foxy
Senior Member
 
Foxy's Avatar
 
Join Date: Mar 2005
Location: Kingston UK, but living in Athens, GREECE
Posts: 18,082
Likes: 0
Received 3 Likes on 3 Posts
Default

Originally Posted by Lars from Norway View Post
I like the news! Reasonably priced too. But cut off on 3 volts, isn't that a bit low? No (or very few) radiosystems will work properly under 5 or maybe 4,5 volts, at this point the servos will be very slow in large scale cars with high drainage with big servos so i think the cut off should be set to around 5 volts instead.
Not to say that you are wrong, you most certainly aren't, as cutoff is always a personal choice, however, it seems that along with many other 'ratings', the lipo cutoff 'rating' has been getting inflated and more inflated as the years go by (just like torque ratings on servos, amp rating on ESCs and batteries, etc).

When lipo first appeared, we were cutting them off at 2.8/cell without any issue whatsoever. The point of no return is still significantly lower than that (2.4 in actuality if I remember correctly), so 3 is well on the safe side. People using 3.2+ in MY OWN personal opinion, are wasting their runtime, for negligible added longevity of the battery. Just my 2c, and my way of saying....meh, don't worry about it!

Disclaimer: This is assuming that you ALWAYS balance charge and your cells are well matched. Old packs with already mismatched cells are MUCH safer with higher cutoffs.

Last edited by Foxy; 11-11-2013 at 05:31 AM.
Old 11-11-2013, 05:30 AM
  #8  
RAMTech-HBF-LSF
Thread Starter
 
Join Date: Nov 2007
Location: Chandler, AZ
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Default

We are finding the cutoff to be around 4 to 4.5 volts when running around bashing. I need to add a digital voltmeter to the test truck and shoot a video of it.

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.