Please help support RC10Talk.com!
Donate towards my web hosting bill!
Any contribution helps!!

Brushless Turns Equivalents to Brushed Turns

New school stuff -- brushless, lipo, spektrum, etc...

Moderator: scr8p

Post Reply
User avatar
vintage AE
Super Member
Posts: 3076
Joined: Fri Nov 14, 2008 6:47 pm
What was your first real rc car?: RC10 Goldpan (6012)
Location: Airdrie, Alberta

Brushless Turns Equivalents to Brushed Turns

Post by vintage AE » Mon Feb 09, 2009 10:47 pm

My brain is turning but I'm not getting nowhere quick

I'm sure there is a chart somewhere out there to tell us what the equivalent brushless motor turns are to brushed motor turns. Maybe this can be a quick and painless fix for me and possibly others. Any links people are willing to share would be greatly appreciated.

cheers,

Anthony

User avatar
y2kgtp
Approved
Posts: 543
Joined: Thu Dec 11, 2008 5:04 am
What was your first real rc car?: RC10 in 84-85 (Tamiya frog b4 that if it counts)
Location: Deltona, FL
Contact:

Re: Brushless Turns Equivalents to Brushed Turns

Post by y2kgtp » Mon Feb 09, 2009 11:38 pm

I have a Speed-T that has a 4800Kv motor. I asked Horizon hobbies, and they said this was an equivalent to a 9.5T motor, if compared to a sensored one.

The Higher the Kv, the lower T motor it would be compared to....

User avatar
y2kgtp
Approved
Posts: 543
Joined: Thu Dec 11, 2008 5:04 am
What was your first real rc car?: RC10 in 84-85 (Tamiya frog b4 that if it counts)
Location: Deltona, FL
Contact:

Re: Brushless Turns Equivalents to Brushed Turns

Post by y2kgtp » Mon Feb 09, 2009 11:41 pm

This chart might help as well. If you look at the Kv4 (RPM/volt) matched up to the turns of the motor, it can get you close.

http://www.teamnovak.com/products/brush ... _chart.htm

aconsola
Super Member
Posts: 2457
Joined: Sat Feb 17, 2007 3:09 am
What was your first real rc car?: Kyosho Stinger
Location: Upstate NY
Contact:

Re: Brushless Turns Equivalents to Brushed Turns

Post by aconsola » Mon Feb 09, 2009 11:50 pm

from what I have seen, 17.5 brushless is roughly equivalent to 27t brushed stock and are raced together, and 13.5 brushless matches up against 19T brushed motors. anything lower than that I don't know.

User avatar
vintage AE
Super Member
Posts: 3076
Joined: Fri Nov 14, 2008 6:47 pm
What was your first real rc car?: RC10 Goldpan (6012)
Location: Airdrie, Alberta

Re: Brushless Turns Equivalents to Brushed Turns

Post by vintage AE » Tue Feb 10, 2009 12:02 am

y2kgtp wrote:This chart might help as well. If you look at the Kv4 (RPM/volt) matched up to the turns of the motor, it can get you close.

http://www.teamnovak.com/products/brush ... _chart.htm
that's a good chart for comparing Kv to brushless turns :D

personally, I am looking for the brushless equivalent to brushed 19t down to 12t :?

but, i think any other info will be beneficial to who ever visits the thread 8)

User avatar
y2kgtp
Approved
Posts: 543
Joined: Thu Dec 11, 2008 5:04 am
What was your first real rc car?: RC10 in 84-85 (Tamiya frog b4 that if it counts)
Location: Deltona, FL
Contact:

Re: Brushless Turns Equivalents to Brushed Turns

Post by y2kgtp » Tue Feb 10, 2009 1:12 am

vintage AE wrote:
y2kgtp wrote:This chart might help as well. If you look at the Kv4 (RPM/volt) matched up to the turns of the motor, it can get you close.

http://www.teamnovak.com/products/brush ... _chart.htm
that's a good chart for comparing Kv to brushless turns :D

personally, I am looking for the brushless equivalent to brushed 19t down to 12t :?

but, i think any other info will be beneficial to who ever visits the thread 8)
Woops...I guess I read that wrong too.....I was thinking sensored to sensorless as it was on my mind :lol:

Bongo Fury
Super Member
Posts: 458
Joined: Tue Jul 01, 2008 1:42 am
What was your first real rc car?: Limited Introductory Series JR-X2! In 1988.
Location: Michigan, via Indiana & Ohio

Re: Brushless Turns Equivalents to Brushed Turns

Post by Bongo Fury » Tue Feb 10, 2009 1:46 am

From what our gang has seen at several off road tracks a 19T spec motor seems to fall between a 10.5 and 13.5. Guys switch to 19T spec brushed for the tracks that combine 13.5/19, 10.5 for 10.5/19 tracks.

My rough guesses just based on observation and talking to various skill level drivers:

17T ~ 10.5
14T ~ 8.5
12T ~ 7.5
10T ~ 6.5
7T ~ 4.5

For entertainment purposes only, no wagering please.

Cheers
Dad always told me to drink gin, not vodka…
At least then maybe people wouldn’t think I was just stupid!

User avatar
JK Racing
Approved
Posts: 4958
Joined: Thu Jul 19, 2007 6:32 pm
What was your first real rc car?: Frog :(
Location: Anaheim Hills, CA

Re: Brushless Turns Equivalents to Brushed Turns

Post by JK Racing » Tue Feb 10, 2009 1:50 am

it is REALLY hard to put a brushed equivalent onto these motors due to the torque involved. a 17.5 is equal to a 27T is a joke (and I say that watching the brushless stock motors kill the brushed ones)...geared the same, the 27T will kill it in top end. the brushed motors have more RPM than the "equal" brushless motor, but with the torque difference, brushless takes the cake.

To further this arguement....

17.5 Novak is rated 2200 Kv @ 7.2 volts = 15480 RPM.
a decent 27T motor is 25000 + RPM, and I have seen them in the 27~28 range (team drivers at regional/national events)

No comparision, but a 17.5 geared right will kill a 27T.

So better question would be, what are you trying to accomplish with a brushless motor and shoot for that, not try to match a brushed motor you currently run.


Oh...a 10.5 was supposed to be close to a 12 turn brushed at one time...
--Joey --Venom Batteries & Chargers -- Maclan Motors
Old School Racer & Vintage RC Car nut
RC10CE (X3),B2,B3,B4,B5, B5m, B6D - 10T,T2,T3,T4,T5M
JRX2-LXT-22.4 1.0
RC10M (custom), RC10L4-O (Velo custom), Academy SPX Pro-O (Velo custom)

User avatar
59burst
Super Member
Posts: 1367
Joined: Sat Jul 26, 2008 1:52 pm
What was your first real rc car?: grasshopper
Location: Seoul, Korea
Contact:

Re: Brushless Turns Equivalents to Brushed Turns

Post by 59burst » Mon Feb 16, 2009 9:19 am

what I heard was brushless x 1.78 = brushed. someone says 1.8 for 10.5T (or 11.5) and less, 1.7 for over 10.5T
I had LRP X11 4.5T/5.5T/6.5T and run Orion vortex 6.5T/7.5T these days. this 1.7~1.8 muliplication seems to work to me

BLS 4.5T = Brushed 8T (4.5x1.8=8.1)
BLS 5.5T = Brushed 10T (5.5x1.8=9.9)
BLS 6.5T = Brushed 12T (6.5x1.8=11.7)
BLS 10.5T = Brushed 19T (10.5x1.8=18.9)
BLS 13.5T = Brushed 23T (13.5x1.7=22.95)

it's NOT a correct table. but not quite worng I think.
in my case, Reedy Ti 12T = LRP X11 6.5T and, Orion 6.5T showed better performance than these two.

User avatar
59burst
Super Member
Posts: 1367
Joined: Sat Jul 26, 2008 1:52 pm
What was your first real rc car?: grasshopper
Location: Seoul, Korea
Contact:

Re: Brushless Turns Equivalents to Brushed Turns

Post by 59burst » Mon Feb 16, 2009 9:33 am

I just found this link at rctech.net

http://www.teamnovak.com/products/brush ... index.html

http://www.modelsport.co.uk/?CallFuncti ... emID=27905

novak says 13.5T = brushed 27T
nosram(LRP) says 13.5T = brushed 23T

break in? brushes? :?:

Post Reply

Return to “R/C Tech Forum”

Who is online

Users browsing this forum: No registered users and 1 guest