mtroniks sport sport rv 15 review

**crzydrivr** · 11-15-2003 11:14 AM

i just wanted you all to know that you shouldnt wast your money on this esc because 2 of them have went up in smoke and i just got back in and the thrid one did it too

**Stampeedee** · 11-15-2003 11:21 AM

That's a shame.

Just for the sake of completeness, could you tell us what setup you were using so we can get an idea of exactly how fragile that ESC is? Thanks.

**crzydrivr** · 11-15-2003 11:34 AM

it says you can run an 8 cell i run a 7 sometimes it says you can have down to 15 turns i have a 19 turn it it goes up in smoke in reverse

**TO FAST FOR YOU** · 11-15-2003 11:38 AM

well then i guess im glad i waterproofed my pede the way i did instead of with that esc.

TO FAST

**arceeguy** · 11-15-2003 02:32 PM

I have one, and a Sport Max. I've run 14T motors on 6 cells with the Sport RV-15 without any problems.

If you are running a 19T spec motor like a Trinity Chameleon, it will draw very heavy current when going in reverse (and it will be dog slow). This is because of the 24° timing.

Most ESC's don't have great reverse capability anyway, so if you were running in reverse for more than several seconds, it is possible to fry the FET's from the huge current draw. The thermal protection won't even have a chance to kick in because of the severe overload. 7+ cells makes things even worse.

If I'm running a motor with a lot of timing dialed in, I use reverse just enough to back out of a bad situation - not 1 second more.

**TO FAST FOR YOU** · 11-15-2003 03:06 PM

i killed an xl-1 by running a stock motor in reverse for too long.

TO FAST

**racerz** · 11-16-2003 11:02 AM

how can you fry a esc in reverse, its the same thing as going in forward isnt it?

by the way, what is timings mean?> im a little new to this, im done with nitro, now im going with electric.

**TO FAST FOR YOU** · 11-16-2003 11:09 AM

advanced timing will give you more power and speed in forward but less in reverse.motors with 24 degree locked timing will have major power in forward but almost none in reverse.also trying to go in reverse for more than a few seconds with 24 degree advanced timing will cause major strain on your esc and thus fry it.

TO FAST

**racerz** · 11-16-2003 11:16 AM

ok but what is the 24 degree mean, like what is 24 degrees

**TO FAST FOR YOU** · 11-16-2003 11:18 AM

the brush positions are changed.im not sure how though.

TO FAST

**arceeguy** · 11-16-2003 11:19 AM

Originally posted by racerz
how can you fry a esc in reverse, its the same thing as going in forward isnt it?

by the way, what is timings mean?> im a little new to this, im done with nitro, now im going with electric.

A lot of ESC's have half the number of FET's or transistors to feed the motor power in reverse. (The XL-1 curiously has equal forward or reverse capabilities) So your ESC will heat up a lot faster when your backing up. It is very difficult to drive at high speeds in reverse anyway (because the tires are aligned for stability going forward), but I see a lot of people whizzing around in reverse just for kicks. Giving an ESC equal reverse capabilities would make the ESC larger and more expensive. The FET's are the most expensive parts in an ESC, and the number/quality of them often differentiates a budget 20T ESC from a 12T unit.

Motor timing is the relationship between the brushes and the magnets in the can. A motor timed at 0° (neutral) will have equal power output forwards or backwards. Spec racing motors like the Trinity Monster Horsepower Stock or Reedy MVP have their timing advanced 24° to provide more power and RPM's. They are designed to run forwards only. If you run them in reverse, they will pull a lot of current from the ESC (which is already "crippled" in reverse) and will not be very fast at all. Prolonged operation in reverse under these conditions can destroy the ESC, motor, or both. Best bet for bashing around is a "modified" motor with adjustable timing. A modified motor is simply a motor that isn't built to a racing specification. (like "spec" motors)

If you're used to a nitro with no reverse, using reverse sparingly in your electric shouldn't be a problem. I often forget that my T-Maxxes have a reverse gear because I am so used to not having reverse with my nitro RC's.

Hope that wasn't too confusing!

**TO FAST FOR YOU** · 11-16-2003 11:25 AM

yes and some forward only escs have no FETs to power the motor in reverse and thus they are smaller.arcee basicaly explained everything.

TO FAST

**crzydrivr** · 11-16-2003 11:47 AM

is the lrp f1 super reverse any good? cause the guy at the hobby shop said it was good

**TO FAST FOR YOU** · 11-16-2003 11:49 AM

as long as you dont run a stock motor or a motor with 24 degree advanced timing.

TO FAST

**arceeguy** · 11-16-2003 11:58 AM

Originally posted by crzydrivr
is the lrp f1 super reverse any good? cause the guy at the hobby shop said it was good

I've got one, and it is a great ESC. It also limits you to 8 seconds of reverse to protect itself. (and your motor)

**TO FAST FOR YOU** · 11-16-2003 12:02 PM

i guess the xl-1 only has like 2 seconds because i went in reverse for three seconds and poof!i had a nice little campfire.

TO FAST

**BeeniDAmeeni** · 11-16-2003 12:22 PM

Out of all my ESC's(Novak, M-troniks & Associated) I prefer the Associated's, I had an LRP and it rocked. It only went in Reverse for about a few seconds as arcee said.

**TO FAST FOR YOU** · 11-16-2003 12:28 PM

all i have is a wimpy xl-1.its kinda the pits.

TO FAST

**CADtech** · 11-16-2003 01:20 PM

Sooo-
If the Mtroniks is no good, and the XL-1 is questionable in reverse, How about the Novak Rooster, or Futaba MC330 in reverse?

There's a MC330 in the mail on it's way to me. I might put this in one of the kids trucks - but they might stand on the reverse more than I can monitor. I hate to have to put my LRP Quantum Sport in there (F/B only!).

Is there a "best" ESC that offers a good reverse? I'm not too interested in going real low # of turns...

**racerz** · 11-16-2003 01:47 PM

so if the xl-1 has equal forward and reverse then how come it will fry if you go in reverse for 2 sec or more?????

and what is the timming on the stock stinger motor?

**TO FAST FOR YOU** · 11-16-2003 02:25 PM

CADtech-no esc will be good in reverse if your running 24 degree advanced timing. all f/r escs will go in reverse if you dont advance the timing to far. racerz-the esc will fry ONLY if you run a motor with 24 degree advanced timing too long.the stingers timing is kinda weird.the brushes are 12 degrees advanced one way but the magnets are advanced 12 degrees the other way.that translates to neutral timing.

TO FAST

**racerz** · 11-16-2003 02:33 PM

well i think im getting the msc instead of the esc, (cheaper) lol
how easly is it to ruin the msc??

**TO FAST FOR YOU** · 11-16-2003 02:39 PM

not as easy as the esc.the esc will fry if you get it wet. the msc wont.the esc will go up in smoke if you run a motor over its limit.the msc you will burn the contacts off.the advantages of the esc are it is smoother,lighter,and more efficient.

TO FAST

**racerz** · 11-16-2003 02:41 PM

smooth and weight i dont worry about. its the run times i worry about, iwant good run times.

**TO FAST FOR YOU** · 11-16-2003 02:43 PM

oh yes i forgot.you will get better runtimes with the esc.

TO FAST

**racerz** · 11-16-2003 07:02 PM

how much of a noticeable difference in runtimes will they have

**crzydrivr** · 11-16-2003 07:23 PM

there will bea few minutes

**racerz** · 11-16-2003 07:32 PM

dang, maybe i should get the esc, but i dont want to, im afraid it will fry

**crzydrivr** · 11-16-2003 08:02 PM

get a good one with a motor short protection i just got a lrp and it works great

**racerz** · 11-16-2003 09:08 PM

what is motor short protection???
and how much was the lrp

**NewbieStampedy** · 11-17-2003 01:44 PM

ive just bought a sport rv15 with a vision pro 14x2 motor and will be running with 6 cell so i shouldnt have a problem if arceeguy didnt

**arceeguy** · 11-17-2003 03:34 PM

Originally posted by NewbieStampedy
ive just bought a sport rv15 with a vision pro 14x2 motor and will be running with 6 cell so i shouldnt have a problem if arceeguy didnt

Just remember you are exceeding published limits, just because I did it doesn't mean that you will have a trouble free experience.
You really have to be careful with gearing and motor timing.
I'd start with 12/87 gearing - and neutral timing on the motor. Check the temps of the ESC often, and use common sense when running your truck. (like don't try and push/pull things, constant forward/reverse action, etc) If the ESC/motor is runnin' cool, then you can gear up a little at a time or bring the timing up a few degrees at a time.

**NewbieStampedy** · 11-17-2003 03:44 PM

these were supposedly were recommended as a pair to my uncle by a representative of some company so....

if they do fry im making the rep pay up!

**cooleocool** · 11-17-2003 04:02 PM

I have a 3 year old novak rooster and i run eather a chameleon2 pro or a p2k2 pro and have ran it in reverse for more than 10 secends and have also got the thing wet plenty of times and still no probs.

**Swami** · 11-17-2003 04:08 PM

Originally posted by crzydrivr
is the lrp f1 super reverse any good? cause the guy at the hobby shop said it was good

Heck yeah! Forget waterproof, this baby's fireproof!!

http://www.swami-rc.com/Burnt-ESC.htm

Still works.

Swami

**NewbieStampedy** · 11-18-2003 01:57 PM

Im happy to report my setup has worked with out a single glitch.
the thing just flies!
Not a problem

**bnkrazy** · 11-18-2003 02:50 PM

Someone asked about the Futaba MC330 reverse...I have been running that ESC for close to 6 months now with no troubles...

I don't run in reverse all day long, but I have let my brother/friends run the truck while I wasn't watching...no problems yet...

It also has great thermal protection...I ran a 14x2 at 18/87 for a month when I first got it...I know...what a newbie

**Maxx-RC 2.5** · 11-18-2003 03:23 PM

how much do thease thing go for

**NewbieStampedy** · 11-18-2003 04:24 PM

which one?

the mtroniks sport rv15 goes at around £45
lrp super reverse is 75$
futaba= ??

sorry bout the dollar/pound thing, i looked on a site the lrp was in dollars and i remember my esc to be around £45

**bnkrazy** · 11-18-2003 10:53 PM

The Futaba MC330 I got on ebay for ~$40. It is ~$60 new I believe...

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