Go Back  R/C Tech Forums > General Forums > Electric On-Road
Which would you use??? >

Which would you use???

Which would you use???

Old 10-14-2004, 11:52 AM
  #1  
Tech Elite
Thread Starter
 
vtl1180ny's Avatar
 
Join Date: Sep 2003
Location: Wrong Island
Posts: 4,963
Default Which would you use???

Ok Let's say a motor has an effieciency around 81%, puts out 162 watts peak and spins 30k Rpm with brush/spring setup #1... Same motor with Brush spring setup #2 puts out 168 watts, 78% efficency and spins 31k Rpm....

Torque is almost dead even between the 2....

spring set #1 is softer than # 2...
vtl1180ny is offline  
Old 10-14-2004, 11:55 AM
  #2  
Tech Elite
iTrader: (33)
 
Jack Smash's Avatar
 
Join Date: Aug 2001
Location: Reno, NV
Posts: 2,949
Trader Rating: 33 (100%+)
Default

I would go with #2. It sounds like the springs might be too light on the first one and the brushes are bouncing when the RPM's come up.
Jack Smash is offline  
Old 10-14-2004, 12:28 PM
  #3  
Tech Elite
 
fatdoggy's Avatar
 
Join Date: Aug 2001
Location: MD USA
Posts: 3,642
Default

No. 2 - More watt's, more rpm.
fatdoggy is offline  
Old 10-14-2004, 12:43 PM
  #4  
Tech Elite
Thread Starter
 
vtl1180ny's Avatar
 
Join Date: Sep 2003
Location: Wrong Island
Posts: 4,963
Default

Very tight track... This is a track we've always run stock only and now we're going 19 turn....
vtl1180ny is offline  
Old 10-14-2004, 05:21 PM
  #5  
Tech Elite
iTrader: (6)
 
EddieO's Avatar
 
Join Date: Oct 2003
Posts: 3,417
Trader Rating: 6 (100%+)
Default

Power is power....as long as the one springs don't cause a fade of the motor because of excessive arching, then always take the most powerful motor....assuming this is a 19t...as efficiency is really not that big of a deal. Now, if efficiency matters, then the question also becomes, will this motor make runtime.


Later EddieO
EddieO is offline  
Old 10-14-2004, 07:35 PM
  #6  
Tech Elite
iTrader: (8)
 
Join Date: Jul 2004
Posts: 2,636
Trader Rating: 8 (100%+)
Default

for most classes of racing nowadays, efficiency is no problem, as eddie mentioned. Thankfully battery technology has evolved to the point where 5 minute races are achieved easily even with the hottest motors (except maybe mod tc on a really hot day). Stock, 19 turn, without a question go for the higher watts.
071crazy is offline  

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 - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.