View Full Version : Need Help With this brushless thing


Benjie Wright
09-24-2007, 09:36 PM
I have a bunch of questions about brushless. But i'll only due a few at this time. 1st- is novak the only systems you can use, if not what other systems are available? 2nd- In order to run legal at most all tracks in the 13.5 class- what all will i need to purchase- including battery size etc? 3rd- Are Lipos going to be legal anytime soon? All these questions are concerning racing oval, with a hyp-03 car, and i would like to be fast. So if it's not going to be fast- don't list it please. Thanks-- Benjie Wright

swtour
09-24-2007, 09:48 PM
Benji,

To better answer those questions...you would need to direct them at the tracks/club/organizations you plan to race.

For instance - if you plan to run BRL races - you can find all their rules on their thread in the BRL section. They do use NOVAK motors exclusively, and have a limit on ESCs.

Where a local club track may have totally different rules based on who is running and/or supporting the races in that area.

Out here in CA right now we are doing similar to the BRL in limiting the equipment at this time to NOVAK only on the motors (except for OPEN MODIFIED) and currently we only allow ESCs from NOVAK and LRP.

Some places have NO real rules in place and it's more a SHOW UP and Run What ya Brung...

(NOTE: We are doing LIPO in 2 classes for 2008, and some have actually started running it already for the remainder of 2007) This uses the ORION 3200 Carbon Edition batteries exclusively.

I don't believe there is any plan to do LIPO in the BRL.

Flipper13
09-25-2007, 07:29 AM
Benjie--you can run 13.5 class with any car and a novak 13.5, speed control being novak or lrp and 4200 4-cell battries. flipper

jdearhart
09-25-2007, 03:30 PM
Benjie, I think you have shown some interest in running at Dillon in the 13.5 class. We have been kicking around some rules, but nothing final yet. Pretty much the same thing as the BRL rules, but open ESC's. They look something like this:

Pan car only
Radial tires only, any compound, any brand
13.5 Novak Pro SS motors only (NO 13mm rotors)
Any speed control
4 cell 4200 max on batteries
Nascar style bodies
Wing may be mounted on the rear window or pod

We also talked about a fixed gear rule. We've been testing over there and anything below a 2.0 got the motors too hot. You would be able to run any Spur/Pinion combo, as long as the final drive equaled 2.0. This would be an effort to try and keep the guys from smoking any motors. I ran my touring oval car over there two weeks ago and smoked my backup motor. :drunk:

If I have left out anything, or you see something that needs to be changed, PM or email me.

I also have a pretty good setup to use as starting point for a Pro 3 slider, so if you'd like I can email it to you. :thumbsup:

Jack

brian0525
09-25-2007, 03:57 PM
JACK,

The motors have a thermal protection so you can't smoke the motor so how did you do that unless you cut the thermal wire? Fixing a gear will only lead to people messing with tire size and timing to gain an advantage. Just thought i would throw that out there incase you didn't think of that when your track was talking about fixed gear!

Good Luck!

jdearhart
09-25-2007, 04:27 PM
Brian,
Is it the motor or speedo that has the protection? Which, I think I might have been screwed either way because I was running a LRP TC esc, and the motor was one that Charlie swapped out at the Nats. I seem to recall him telling me that the stuff he had didn't have thermal protection? I don't know, I'm new to this brushless stuff too! :freak:

swtour
09-25-2007, 04:30 PM
...the LRP doesn't have the Thermal limiting feature for the Novak motors, so you can overheat a motor if overgeared using the LRP's.

I can see in a heavy touring car on 6 cells where that could be a problem...I don't think you'll burn one up in an oval car...but anything is possible.

NovakTwo
09-25-2007, 04:34 PM
Brian,
Is it the motor or speedo that has the protection? Which, I think I might have been screwed either way because I was running a LRP TC esc, and the motor was one that Charlie swapped out at the Nats. I seem to recall him telling me that the stuff he had didn't have thermal protection? I don't know, I'm new to this brushless stuff too! :freak:

The Novak motors are not protected from thermal overload when used with an LRP (or any other sensored) controller.

The N motors are only protected when used with a Novak esc. The N esc also has thermal protection to protect the controller from over-heating.

You can always e-mail charlie@teamnovak.com with any tech questions.

jdearhart
09-25-2007, 04:58 PM
I guess it's just another reason to stick with Novak! I swapped my 6 cell GTB out for a 4 cell spread spektrum, so thats the reason I ran the LRP. Maybe I hust need to sell it and buy another GTB. LOL!

KenBajdek
09-25-2007, 07:52 PM
How do you plan on tech with the gear rule? It seems way too hard to keep up with checking those. Tech on the 13mm rotor will be just as difficult. You will have to spend a lot of time on the tech end and less on racing.

I understand that you want to keep the cars equal but it seems like that it will be very time consuming to do so.

Tommygun43
09-25-2007, 08:59 PM
How do you plan on tech with the gear rule? It seems way too hard to keep up with checking those. Tech on the 13mm rotor will be just as difficult. You will have to spend a lot of time on the tech end and less on racing.

I understand that you want to keep the cars equal but it seems like that it will be very time consuming to do so.

I know a track that has a fixed gear rule for their spec class. They have to run a 124 spur to make tech easier. Tech pulls the pinion, measures the right rear tire and punches it in the computer, they have a gearing program to make it easier, so they just need to input tire size and # of tooth pinion. It doesn't take much time at all, they do a heat of 5 in less than a couple minutes. They have been doing this for a few years and I have never seen it be a problem. This is probobly the only track I know of that actually has new people getting into the hobby.

Benjie Wright
09-25-2007, 09:53 PM
The way i'm understanding it so far is that the GTB is the speedo of choice, Is there any thermal protection that i would need to purchase. Please keep in mind i do not mind purchasing this stuff, I just do not want to keep purchasing the same stuff over and over. As far as the battery , i was sorda hoping for lipo's, Mainly just to keep from having to buy so many of them. However if it is 4200- thats fine, what codes do i need to look for and so forth. Again keep in mind that i have been running Nitro for several years and have totaly lost touch with any of the electric stuff. But keep it coming, any help is very much appreciated. Thanks Benjie Wright P.S I will not be online thursday or friday ,but keep putting the info up here, i'll read it when i get back . I was planning on making my 13.5 debut at DILLON, that track is really cool. Thanks Again

jdearhart
09-25-2007, 10:23 PM
How do you plan on tech with the gear rule? It seems way too hard to keep up with checking those. Tech on the 13mm rotor will be just as difficult. You will have to spend a lot of time on the tech end and less on racing.

I understand that you want to keep the cars equal but it seems like that it will be very time consuming to do so.

Well, theres nothing set in stone yet, and it was mainley a thought to help some of the newer guys out. Most, if not all of the guys run PRS gears here now, and that would be very easy to tech. All you have to do is measure the spur, multiply that by 64 (assuming its a 64 pitch gear) and subtract two. That will give you the spur size, and the pinion has it imprinted on it, so it would be fairley easy.

Sonny B
09-25-2007, 11:29 PM
The roll-out rule is a good idea. With every one using the same spur gear it would not be that difficult to tech. I almost added it this year to our 13.5 class to slow them down a little. After adding the 17.5 class I did not feel it would be necessary.

I like the idea that for new racers from the beginning it would teach them one of the basics of R/C, learning how to calculate roll-out and how gearing needs to change as the tires wear.

Fl Flash
09-27-2007, 05:18 AM
Dont rule out the LRP Sphere Competition speedo Ive ran one in my HD Pro 3 since Feb. with 10.5, My Favorite 13.5, stock and 19t motors never had a bit of problem with it! Light, compact and Lipo compatible for the future.

Ralf
09-27-2007, 06:40 AM
Do the LRP's have thermal protection for the motor or esc ?Dont rule out the LRP Sphere Competition speedo Ive ran one in my HD Pro 3 since Feb. with 10.5, My Favorite 13.5, stock and 19t motors never had a bit of problem with it! Light, compact and Lipo compatible for the future.

KenBajdek
09-27-2007, 09:32 PM
I don't think so . It is a Novak motor with Novak speedo. Just watch your gear ratio and monitor it after a run and you will be fine. 150 after 4 minutes is about right.

Fl Flash
09-29-2007, 08:09 AM
Do the LRP's have thermal protection for the motor or esc ?

No they do not, but I,ve never had a problem, as Ken said monitor your motor temps, 150 max is what I look for after a run.

gezer2u
09-29-2007, 04:32 PM
This is on the LRP website.

Multi-protection System. 3-way digital protection system against overload, over temperature, and short circuit.

LARCGuy
09-30-2007, 03:52 AM
monitor your motor temps, 150 max is what I look for after a run.

We have had them quite a bit warmer than that. Racing in the desert in 110 degree heat, my personal best is 190. Car was fast with no lingering negative effects. Just let them cool down in between runs. The magnet will return to normal.

The magnet will start to be permanently damaged around the 220 mark.

The flip side to this is night racing in 65 degree weather with the heatsink on. Geared to the moon for lots of big rip and coming off the track at 125 :D