mamba maxx?
 

what would happen if im out running with a mamba maxx on 14 cells and a 8 xl motor and my reciver pack dies:026: ???? would it het up or fry??

...shouldnt do...It would probably shut-off before smokin'...bUt i dont think it would even do that...

Why would it heat up or fry? Think about it a bit... It only runs the Rx and the servos.

The pack would just eventually get low voltage, after quite a while, and you would start to lose range and prob start to get some glitching and poor responce from the servos. You would know the pack is getting low and you'd pul the truck in to switch packs or pack it in for the day.

ok good lol im just making shure.

If the pack gets low enough that the receiver no longer operates, the failsafe in the MM will kick in and stop the motor from spinning. It might take a couple of seconds for it to kick in (my RX pack got disconnected last night, and this is how long it too), but it will kick in.

yeah, it'll just die out. You shouldn't have any heat issues with the rx pack, unless the cells are bad of course.

Its OK, chill baby...loosey goosey


:017:

hahaha the school of rock............ yeh well i have had my speedcontrolls go up in flames while going down the street and then they glitch and it goes into my nieghbors house like 5 houses down and then starts burining so i had to rip off the battery and throw it down the sewer because it was leaking BIG time lol but yeh i just dont want any surprises

Actually, I have to render this post as not 100% true. Just a few minutes ago I was driving my Rustler, and broke the antenna tube (75mhz FM receiver). I wrapped the antenna around the base of what was left of the antenna tube, giving me an effective range of about 15-20ft before it would start glitchting. So I was going along, and then all of a sudden I no longer had control. The Rustler was fortunately going only about half throttle (but still at least 25mph) when it hit my neighbor's driving, and skimmed his car. I think it only skimmed the muffler, as I saw some sparks. I'm really hoping that I didn't dent anything, but I will have to wait until the morning to check.

The damage to my Rustler is dented capacitors, which happened when the Mamba Max was ejected after hitting the driveway and the truck hit the muffler.

To summarize, the Mamba Max won't cut off in case of a bad signal. My receiver was sending it ~50% throttle signal, which the Mamba Max did not refuse.

MetalMan.... Man... that's not good at all.....

wow i would just about crap a brick if my e revo hits a mail box or something lol well i guess i will find out

Are you sure the signal was in fact ~50% throttle, or might it be random noise that the Mamba Max interpreted as 50% throttle? I'm just wondering if a failsafe would have helped here...

can i use the fail safe from my nitro cars????? i could hook it up to the servos so when they wouls stop i would know to charge it up???????? i would hook it into the servos obviously, but would that cause interfearence between the speedy and failsafe???

What servos are you going to hook it to? The failsafe simply monitors the signal from the receiver and if it sees that it looks like it isn't a valid singal, it interrupts the signal and outputs a preset signal to the ESC. Obviously, you'd set this to a neutral setting. So, you can hook it directly to the ESC. Once out of range, the failsafe should put the ESC into neutral.

The only problem with an external failsafe is that it monitors for an invalid servo signal. If the noise looks a lot like a valid signal, it will let it go to the ESC and who knows what will happen. A failsafe built into a receiver on the other hand looks at the transmitted signal so it's a little "smarter" IMO.

The Mamba Max is supposed to have a built-in failsafe of sorts (as do most ESCs), so that if the signal is lost the ESC will remove power from the motor.

If it was noise, then it was consistent noise. From the time when I lost control of the throttle to the time when it hit my neighbor's car, the RPM of the motor was not varying, so to me it seems like it couldn't have been glitching from noise.

Unless the "noise" was something consistent... Kinda unlikely though.

That failsafe you speak of in ESCs; is that just the arming routine? I know most ESCs look for a valid signal before initially turning on, but I've never known it to be continuous. Interesting.

Whatever the cause, I hope you get it squared away before it descides to do that at FULL throttle!

By the way, did you see what the damage was to the nieghbor's vehicle?

I've always thought that most of the ESCs we use will cut the throttle in the event that the throttle signal is lost (like a failsafe would). I am about 90% sure that an ESC like the Mamba Max would have this feature, and in some cases I have noticed that it does (from it activating the "failsafe").

My case is rather peculiar. I've been having pretty serious glitching issues for close to a year now, and it had all occurred using the same MX-3 transmitter (75mhz FM). Earlier this week I got another MX-3 transmitter (used) from Ebay, along with a new set of "genuine" Airtronics crystals. I have two receivers that I'm using right now, and both are Novak XXL receivers. The one that was in the Rustler last night isn't in the greatest condition, so it's very possible that it's not-so-good condition could be causing the glitching. But my other XXL receiver is in much better condition, although I have yet to try it with both the new transmitter and the "genuine" set of crystals.
I can't just get a new radio system, since I'm on a VERY tight budget for what I do in RC (brushless + Lipo everything).
Some time I will have to make a thread of my own for discussing this problem, since I don't want to take up this thread.

But since you asked, I looked at the neighbor's car this morning, and it appeared that there wasn't any damage. Granted, I didn't go up right next to it and look, but there was certainly no noticeable damage, so I guess I only hit the bottom of the muffler.
Funny thing, I asked my other neighbor friend if he heard a loud thud that night at about 9:00pm, and he said he did! Although I will admit it was pretty loud...

So if you lose signal, the esc is suppose to shut down power to the motor? Or the servo's too? I'm assuming just the motor.

Since the Mamba Max doesn't have any control of the servo(s), it would just be the throttle/motor.

That's what I thought. Just wanted tha clarified. I lost signal once and my truck would not move, it was pretty far away, but I could see my wheels moving back and forth! LOL

well ok no exernal fail safe lol it sounds like the mm will do me good lol thats for the help guy's much appreciated

My schulze had a cool feature...

it hit FULL brake once the signal was lost...

Nice if your doing speedruns and your driving underneath electricity lines.....

the brake of the schulze/plettenberg is unbelievable strong..

it shredded some of my diffs..

ouch, and lets say kids around me get new rc cars, tycos i would think for the most part and a few real ones but no near me, what would happen if one of them had the same channel as me??????? would the mm stop because there is 2 of the same channels going into the same speedy???????

no.. the MM won't get interference.. the kids tycos will....

there will be a few real rc's tho what about those??? same?

I wouldn't worry about it...There are 60+ channels, so it shouldn't even be a concern...

AFAIK, all Tyco (and similar) "toys" use 27MHz and 49Mhz AM frequencies. That's it. They don't have multiple channels for each, just two. Even if you have an AM transmitter, you should be safe because the RF filtering is a bit better than Tycos. The only exception to this to my knowledge is the RadioShack xmods, which do use just about the same AM channels as regular R/C AM channels. As a matter of fact, I used to use xmods crystals in my Nitro Revo since I already had the expansion set.

You should be quite safe with FM and even more so with 2.4Ghz (like Spektrum, Nomadio, and the like).

i was going to buy a jr radio the nice 3 channel one thats synthesied but i didnt lol im going to buy a f-350 high lift its like 100 bucks more and alot more fun lol i was like hmmm a radio i use all the time or new un kit to build then drive and have a sick scale tow rig that i would use YEEEEEEHHHHHH lol