R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Track Locator Forum

Reply
 
Thread Tools Search this Thread
Old 12-07-2011, 07:32 AM   #616
Tech Fanatic
 
highster's Avatar
 
Join Date: Sep 2004
Location: SW PA
Posts: 761
Trader Rating: 30 (97%+)
Default

Ok guys looking for a little help here.

Forgeting the "box stock" class discussion for a bit, what is considered a stock brushless motor?

I have been told on other forums that it would be any 17.5, but then I see ratings like the 3300Kv of the Reedys. But then I also see 17.5T motors that have a Kv rating of anywhere from 2650 to I think one was 3700. So to say the least, Brushless ratings have me a bit confused.

If we were still talking brushed motors, I had that mastered. LOL

I ask because I picked up a brushed Slash, from Steve, for my son, but I'm sure we will be getting a brushless system soon. And I also picked up a ezrun brushless system, but the motor only has one thing stamped on it. And it is 10T. So I would assume that would roll in somewhere close to an old brushed 17 turn. But as I said not too sure...

Thanks in advance for any and all help.
highster is offline   Reply With Quote
Old 12-07-2011, 07:45 AM   #617
Tech Elite
 
Ostach24's Avatar
 
Join Date: Apr 2010
Posts: 2,611
Trader Rating: 85 (100%+)
Default

The last time I checked on all the kv atings the 17.5 was right at and under a 2500 kv. They might have changed, but I can look into it.

Driving does come into play no matter what the class. A driver who does not wreck should be able to win no matter what the equipment.

The suggestion was good as far as making everything fair, but until we get more people running just a brand and just a certain esc/motor I think it is just not practical. I feel like if we did run only sc with a 3300 kv or 13.5 guys would get a tekin esc and a d3 motor and different servos and we would be right back at the debate of the money thing and not having fair equipment. Even if everyone ran a 3300 reedy system if people upgraded servos it would probably go the same. The only way it could be done with no discussion would be to say out of the box everything. So if your radio or servo or whatever doesnt come out of the box you cant run it.
__________________
Cobra Graphics

For all your graphic design needs.
CobraGraphics.net
Ostach24 is offline   Reply With Quote
Old 12-07-2011, 10:04 AM   #618
Tech Adept
 
olds45512's Avatar
 
Join Date: Jul 2008
Location: Indiana,PA
Posts: 216
Trader Rating: 2 (100%+)
Default

I pretty sure novak rated there 17.5 at 2300 and the 13.3 at 3300 but im not sure about what other manufacturers rate there's at. A brushless motor that's marked 10t would be way faster than a 17.5, I think the kv rating on a 10t motor will be somewhere around 5000 give or take depending on the manufacturer.
__________________
FRIENDS DON'T LET FRIENDS RACE OVAL
olds45512 is offline   Reply With Quote
Old 12-07-2011, 12:15 PM   #619
Tech Regular
 
rcmark17's Avatar
 
Join Date: Oct 2009
Location: PA
Posts: 291
Trader Rating: 12 (100%+)
Default

Here are some Kv ratings rignht off the Trinity website

10.5 4300Kv
13.5 3600Kv
17.5 2300Kv
These are the ratings for their D3 brushless motor line same as Fantom Racing's Ion3 line
rcmark17 is offline   Reply With Quote
Old 12-07-2011, 12:45 PM   #620
Tech Fanatic
 
highster's Avatar
 
Join Date: Sep 2004
Location: SW PA
Posts: 761
Trader Rating: 30 (97%+)
Default

From EzRun:


T Kv
17.5 1900
13.5 2300
8.5 4000
5.5 6000

Leopard

17.5 1770
14.0 2530
9.0 3540

Reedy

17.5 2268
10.5 3723
8.5 4600


So I guess to anwser my own questions, there really isn't any standard in all this brushless. Even more confused.

Last edited by highster; 12-07-2011 at 12:45 PM. Reason: misspelling
highster is offline   Reply With Quote
Old 12-07-2011, 12:58 PM   #621
Tech Addict
 
carcrusher46's Avatar
 
Join Date: Sep 2006
Location: the 'burgh
Posts: 648
Trader Rating: 17 (100%+)
Default

It's not really any different than the brushed days - the number of windings is what the class is defined by, not the kv. As each 17.5 has a different kv (rpm/v), the old brushed motors would have different rpm specs on the dyno sheets as well:

P2K2 - usually around 19,000rpm @5v, 98-99Nmm of torque
Revenge of the Monster - usually around 23,000rpm @5v, 93-96Nmm of torque

No different than a Reedy turning 2268rpm/v versus a Trinity turning 2300rpm/v
__________________
Matt Stoltz
Thank you to my sponsors:
Team Associated - Reedy - JConcepts - Life Fast RC Paintworks
carcrusher46 is offline   Reply With Quote
Old 12-07-2011, 01:03 PM   #622
Tech Regular
 
Pete Vitale's Avatar
 
Join Date: Mar 2009
Location: Murrysville, PA
Posts: 271
Trader Rating: 8 (100%+)
Default

I was shopping for a 17.5 motor for Gavin's SC Exotek conversion I'm building him and the Novak motors are rated at 2200Kv. Is there a standard out there the manufactures adhere to? This is almost as bad as C ratings with lipos.

Skip my 2200Kv statement. Read Matt's post.
__________________
In search of a faster transponder.

Last edited by Pete Vitale; 12-07-2011 at 01:04 PM. Reason: I'm an idiot
Pete Vitale is offline   Reply With Quote
Old 12-07-2011, 01:21 PM   #623
Tech Fanatic
 
highster's Avatar
 
Join Date: Sep 2004
Location: SW PA
Posts: 761
Trader Rating: 30 (97%+)
Default

Thanks Matt. that does tend to clear it up a bit.

I guess I was more under the impression that brushless would do away with large swings of rpm, within a given "class" of motors. But I guess if I would have spent a bit of time using some knowledge that I have, I would have known better.
highster is offline   Reply With Quote
Old 12-07-2011, 03:33 PM   #624
Tech Addict
 
carcrusher46's Avatar
 
Join Date: Sep 2006
Location: the 'burgh
Posts: 648
Trader Rating: 17 (100%+)
Default

That's only the tip of it - many of the motors available now have the ability to change different rotors so you can have more torque/more rpm.

I'm going to talk with some of the guys this weekend about the status of stock racing in terms of the new ROAR rule announcements that have been gaining a lot of positive feedback throughout the racing community with regards to keeping things even for everyone and keeping it affordable for new racers.
__________________
Matt Stoltz
Thank you to my sponsors:
Team Associated - Reedy - JConcepts - Life Fast RC Paintworks
carcrusher46 is offline   Reply With Quote
Old 12-07-2011, 04:33 PM   #625
Tech Adept
 
Join Date: Jan 2011
Location: Pennsylvania,USA
Posts: 108
Default

no big deal that we cant run a box stock on sunday, i guess what i was trying to say was to have a class that i can run my new truck with without changing much. i will just throw a 17.5 in it or something to run on road course because i like the speed thing on sundays, i will stick with the mod for oval, thinking about getting tekin 8.5 for sc10 and so is my father and tekin 7.5 for t4 ME LIKE SPEED
jjdyost is offline   Reply With Quote
Old 12-07-2011, 05:07 PM   #626
Tech Fanatic
 
highster's Avatar
 
Join Date: Sep 2004
Location: SW PA
Posts: 761
Trader Rating: 30 (97%+)
Default

Is there many people still runnig T4's?

I haven't looked at much besides sc trucks, I would've thought AE would have been up to a T6 or 7 by now. I loved those T4's you really get them around an oval quick...
highster is offline   Reply With Quote
Old 12-07-2011, 05:31 PM   #627
Tech Addict
 
carcrusher46's Avatar
 
Join Date: Sep 2006
Location: the 'burgh
Posts: 648
Trader Rating: 17 (100%+)
Default

The T4 is largely unchanged. The newest truck is called the T4.1 but most of the changes have been small as far as functionality - new shocks that are easier to rebuild, different slipper spring and pads, new rear hubs, and a new rear toe block design are the only real changes - pretty much everything is 100% compatible between the two though.
__________________
Matt Stoltz
Thank you to my sponsors:
Team Associated - Reedy - JConcepts - Life Fast RC Paintworks
carcrusher46 is offline   Reply With Quote
Old 12-07-2011, 05:44 PM   #628
Tech Elite
 
Ostach24's Avatar
 
Join Date: Apr 2010
Posts: 2,611
Trader Rating: 85 (100%+)
Default

Derick bring the thing sunday and sign up for it. You and your dad can run, and I am sure there will be other guys who run them too. we always have guys sign up for box stock, but when it comes down to it i decide to put them in mod or stock depending on what other classes they run and how good they are.
__________________
Cobra Graphics

For all your graphic design needs.
CobraGraphics.net
Ostach24 is offline   Reply With Quote
Old 12-09-2011, 06:10 AM   #629
Tech Fanatic
 
highster's Avatar
 
Join Date: Sep 2004
Location: SW PA
Posts: 761
Trader Rating: 30 (97%+)
Default Looking for detailed track info

Hey guys its the pain again,

I've read about 19 pages of this thread and haven't found what I'm looking for so I will just ask the experts.

I remember talking to Jim, way back earlier in the year, and he had told me it was a club and you need to join to race after 3 times.

My questions are this:

1) How much to join and whom do I see to join?

2) Is it a membership per person or per family?
2a) If per family to what age?

I ask becasue as it stands for me, My son, 17, and myself will be there most ever race after the New Year. My girlfriends two boys, will be join us every now again. But it wont be an every week thing, as they spend most weekends with their father.

thanks in advance. And I promise I will quit being a pain.

Someday.

Tom
highster is offline   Reply With Quote
Old 12-09-2011, 10:25 AM   #630
Tech Elite
 
Ostach24's Avatar
 
Join Date: Apr 2010
Posts: 2,611
Trader Rating: 85 (100%+)
Default

Okay, the thing with the family membership is for a family living in the same household. The wife/girlfriend also counts on your plan if you guys live together... idk if she planned on racing or not. The cost is 25 per family for the year. This being the end of the year they might just wait until the new year comes around and worry about memberships then. Just ask Big Andy or Jim about the membership if you want to know more.
__________________
Cobra Graphics

For all your graphic design needs.
CobraGraphics.net
Ostach24 is offline   Reply With Quote
Reply



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 08:28 PM.


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