R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 11-29-2004, 11:39 PM   #1
Tech Fanatic
 
pink pac man's Avatar
 
Join Date: Aug 2004
Location: RATED X RACING Canberra,Australia
Posts: 894
Default p2k2pro....from tower

a mate of mine got a trinity p2k2pro from tower...........and it says it has 30,600 rpm

and my mates has 17,982rpm
and tower says it has 67.7 efficiency and my mates has 56.6 efficiency
and tower says it has 127 power.....my mates has 60
and tower says it has 172 and my mates has 101

wtf is goin on........any1 know why its so crap

link http://www2.towerhobbies.com/cgi-bin...&I=LXAVJ2&P=ML


thanks in advance
pink pac man is offline   Reply With Quote
Old 11-30-2004, 12:35 AM   #2
Super Moderator
 
Grizzbob's Avatar
 
Join Date: Feb 2002
Location: Sand Springs, OK
Posts: 3,063
Trader Rating: 2 (100%+)
Default

Sounds like one of them was tested on the Robitronics dyno(the one with higher numbers), & the other was likely tested on Fantom's dyno. Trinity made the switch a couple of years ago(though there could still be some of the older motors out there, especially from places like Tower) to the Fantom dyno, & they just test a slightly different way(including the default voltage they test at, the Fantom I think does it at 6 volts, while the Robi's default voltage setting is 7.5, & more volts=more motor power, rpm, etc.). Makes it pretty hard to directly compare, but from my experience, both sound like they're ok, & both should run similarly well, so don't sweat it....
__________________
Bob Seay
Tamiya TRF417, TA05v.2, TRF211XM, M-05ver.2R, XRAY X12, Associated B5m Factory Lite

Go Pokes!!!
Grizzbob is offline   Reply With Quote
Old 11-30-2004, 12:42 AM   #3
Tech Elite
 
ottoman's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: wisconsin
Posts: 2,761
Trader Rating: 13 (100%+)
Default

And before they used Robi they used Turbo 45's... none of those Dyno's will spit out the same numbers.
ottoman is offline   Reply With Quote
Old 11-30-2004, 04:50 AM   #4
Tech Apprentice
 
Join Date: Oct 2004
Location: Central N.C.
Posts: 56
Default

In defense of Tower Hobbies they state that those numbers are optimal figures. Numbers will vary between batches. We all know that every production motor isn't the same as the others.
2BAD4ALL is offline   Reply With Quote
Old 11-30-2004, 01:09 PM   #5
Tech Elite
 
edseb's Avatar
 
Join Date: Jan 2004
Location: Laguna Niguel, California
Posts: 2,421
Default

Tower just sells them. Unless its their brand, than its up to Trinity. And, like some other posts mention, it could be tested a different way; like a different dyno.
__________________
RC Car Action Editor and Photographer
Carl Hyndman
edseb is offline   Reply With Quote
Old 11-30-2004, 06:22 PM   #6
Super Moderator
 
Grizzbob's Avatar
 
Join Date: Feb 2002
Location: Sand Springs, OK
Posts: 3,063
Trader Rating: 2 (100%+)
Default

Yes, believe me, I have no doubt that the numbers Tower is quoting is from when Trinity used the Robitronics dyno(I know because I have the Robi dyno myself), & Tower just never bothered to change the numbers in their listing of that motor to reflect Trinity's change.
__________________
Bob Seay
Tamiya TRF417, TA05v.2, TRF211XM, M-05ver.2R, XRAY X12, Associated B5m Factory Lite

Go Pokes!!!
Grizzbob is offline   Reply With Quote
Old 11-30-2004, 06:27 PM   #7
Tech Fanatic
 
pink pac man's Avatar
 
Join Date: Aug 2004
Location: RATED X RACING Canberra,Australia
Posts: 894
Default

tower may have said that they will be lower......but they cant be as low as my mate had
pink pac man is offline   Reply With Quote
Old 11-30-2004, 08:06 PM   #8
Moderator
 
Speedo's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2001
Posts: 3,431
Default

Quote:
Originally posted by pink pac man
tower may have said that they will be lower......but they cant be as low as my mate had
Because those numbers were from a Fantom dyno. Tower's numbers are from a Robitronics, so it is useless to compare the numbers.
Speedo is offline   Reply With Quote
Old 11-30-2004, 11:34 PM   #9
Super Moderator
 
Grizzbob's Avatar
 
Join Date: Feb 2002
Location: Sand Springs, OK
Posts: 3,063
Trader Rating: 2 (100%+)
Default

Right, if you took those 2 motors right now & tested them on the exact same dyno, you'd most likely get almost identical numbers(assuming both are in the same condition). It's not the motors, it's the dyno they're tested on....
__________________
Bob Seay
Tamiya TRF417, TA05v.2, TRF211XM, M-05ver.2R, XRAY X12, Associated B5m Factory Lite

Go Pokes!!!
Grizzbob is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tower Hobbies. TOWER™ Terror 25 Nitro 4WD fstnv1 R/C Items: For Sale/Trade 4 01-19-2008 10:02 AM
tower $30 off $200 bigemike Electric On-Road 6 09-18-2007 06:20 PM
Trinity P2k2Pro ARM- pls help! sonneteer Electric On-Road 21 07-14-2006 05:46 AM
p2k2pro hippykakka Electric On-Road 9 01-05-2005 02:25 PM
Tower fatdoggy Chat Lounge 39 09-17-2001 11:52 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 10:53 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