R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-08-2007, 10:52 PM   #1
Tech Master
 
Join Date: Jun 2005
Location: Brisbane. Australia
Posts: 1,820
Trader Rating: 5 (100%+)
Default Tire Warmers?

ok, i remember a website teaching me how to make tire warmers he used denim and nichrome wire, now im curious if i get some nichrome wire and a much more temp control can i make my own warmers?
with nicrome wire, the stuff i have found is 13.3 ohms a metre now if i my friends tire warmer draw about 3 amps to 4 amps, using ohms law i found at 13.8v and 1 amp (as the w warmers are in parralel) i need 13.8 ohms in each cup which means each cump with 1 metre of nichrome will draw a little over 1 amp altogether in parallel will draw 4 amps?
is this all correct? can i just plug this into a temp cut off unit atach the temp sensor and it will start and stop the circuit as the tires rech desired temp?
any suggestions would greatly be appreciated
__________________
Josh P
to make Keith happy
Corally phi
M11
SP GT
SP 5.5,17.5
aus jd 2703 is offline   Reply With Quote
Old 03-09-2007, 12:57 AM   #2
Tech Regular
 
Join Date: Aug 2005
Posts: 308
Trader Rating: 1 (100%+)
Default

I made a set of tire warmers using that kind of wire. I too did some calculations but in the end, i got there by trial and error.

pick the amount of wire that you think is necessary. With aligator clips connected to your power supply, see to wich temperature the wire goes. If you want hotter, just move the aligator clips closer and vice-versa.

BTW, i didnt use denim, but coca-cola cans wich i cut using a dremel disk. Denim can get messy if you use tire aditive.

Good luck mate
Itchy is offline   Reply With Quote
Old 03-11-2007, 07:13 PM   #3
Tech Master
 
Join Date: Jun 2005
Location: Brisbane. Australia
Posts: 1,820
Trader Rating: 5 (100%+)
Default

can anyone tell me what current i will need to get the warmers up to about 80'celcius?
cheers,
__________________
Josh P
to make Keith happy
Corally phi
M11
SP GT
SP 5.5,17.5
aus jd 2703 is offline   Reply With Quote
Old 03-12-2007, 05:57 AM   #4
Tech Elite
 
Mason's Avatar
 
Join Date: Oct 2004
Location: Ocala, Florida
Posts: 4,869
Default

<oblig>1.21 gigawatts!!!</oblig>

good luck with it. sounds like a fun time with electronics.
__________________
Mason McCombs
NewRed Hobbies & Indoor Facility
Off-Road, Dirt Oval, Crawlers & Pullers
Mason is offline   Reply With Quote
Old 03-12-2007, 10:21 AM   #5
Tech Elite
 
joe of loath's Avatar
 
Join Date: Mar 2007
Location: Bristol, England, United Kingdom
Posts: 4,857
Trader Rating: 1 (100%+)
Default

1.21 gigawatts??? surely theres some mathamatical error?
joe of loath is offline   Reply With Quote
Old 03-12-2007, 01:50 PM   #6
Tech Addict
 
smostyn's Avatar
 
Join Date: Jun 2006
Location: Southport
Posts: 527
Trader Rating: 9 (91%+)
Default

1.21 gigawatts, straight into the flux capacitor!
__________________
Shayne Mostyn


Meakin Park Model Raceway, the best club in SEQ



I am no longer racing. Now I plan to bash around on a larger scale.
smostyn is offline   Reply With Quote
Old 03-13-2007, 10:21 PM   #7
Tech Elite
 
Swamp Rat's Avatar
 
Join Date: Jan 2006
Location: Logan
Posts: 3,723
Trader Rating: 5 (100%+)
Default

Jd


The final temp depends a lot on how the wire is mounted / insultated
The distance between wire turns and heat loss.
your maths are correct approx 1.1 -1.2mt of wire is needed.
adjust as Itchy suggests IE the shorter the wire the more current (more current = hotter) you will also have to allow for volt drop from the Power supply. use 13.2v for calculations

as current increases voltage will drop slightly but you should be in the ball park.
__________________
LCRCCC. inc. The Greatest Club in QLD.
Come see our great new layout.
Schumacher Mi6 x 2,Yokomo BD7, Roche F1, SP F1 x2,Serpent SF2 F1, MO5 mini, M03 Mini, Corally F1 on Rubber, Futaba 4PX,
Ax10, SCX10, Joker Visit : www.lcrccc.org.au

Last edited by Swamp Rat; 03-14-2007 at 06:30 PM.
Swamp Rat is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
F/S: Much More CTX-W IC Tire Warmers fav0re R/C Items: For Sale/Trade 1 09-02-2008 07:26 AM
Tire warmers Drifting101 Australia Wanted to Buy 3 08-14-2008 06:06 PM
FS: NIB Reedy Tire Warmers, plus some Speedmind Tire Warmers. Mustangz R/C Items: For Sale/Trade 1 03-25-2008 10:11 PM
MM Tire Warmers DTM.inc Australia For Sale/Trade 5 11-25-2007 10:25 PM
Tire Warmers blewer R/C Items: For Sale/Trade 5 07-05-2005 05:13 AM



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 03:18 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net