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-   -   ANOTHER Flux MMM goes up in flames!? (https://www.rc-monster.com/forum/showthread.php?t=20951)

Freezebyte 05.19.2009 10:28 PM

Quote:

Originally Posted by fastbaja5b (Post 288517)
Just as an example Nubz tyres are 146mm and Dirtbonez are 150mm in Diameter, now I found these two to be undergeared in the Flux (high motor temp, low esc and battery temp) on stock gearing, and the Dirtbonez on stock gearing calculates at 35.45mph

Stock GT-2 tyres are 160mm (6.3 inches) to calculate at 37.856mph
HPI Terrapinz are 170mm (6.69 inches) to calculate at 40.199mph

All 3 fall within the safe 35-40mph range on 4s for the Flux on stock gearing, however my experience has shown that the Dirtbonez are a bit on the undergeared side and should go up to say a 22t pinion for 38.99mph

The set up you have shown that "blew up" may be fine on 4s Lipo (38.46mph) but on 6s Lipo it's out at 57.68mph stock gearing and a crazy 72.1mph on a 25t pinion if you take the manual as gospel (which it aint)

And that's not considering the extra weight your alloy bling rims throw in the mix.

Add in a sock over the esc which resticts air flow as the fan doesn't draw air in, merely circulates what is available, I'm not at all surprised it blew up!

I'll be using Axials plastic 40mm beadlock spoke rims, not Prolines. And I'll definently cancel my plans to use a blue overwears on my ESC as well...

http://www.axialracing.com/tools/loc...5ebc72a97f.jpg

Unsullied_Spy 05.19.2009 10:35 PM

Quote:

Originally Posted by Freezebyte (Post 288521)
I"ll take that chance, monster trucks are meant to have big ass tires. I refuse to believe that 2200kv will have a hard time powering 40 series wheels with the torque that thing puts out...

I like big wheels as well, hence why I've still got them on my Muggy, but you have to gear down to keep your temps down and keep from over drawing.

JThiessen 05.19.2009 10:36 PM

Seems to me that when you ran the calculator, your balloon factor was a little low - I'd plan on .5 to .75 with those tires.
Someone else correct me if I'm wrong, but his numbers showed about 36K rpm. I try to hit the low to mid 40's for rpms.

Your right - trucks are meant to have big tires. Go have fun with it, quit worrying about everything you read. You'll find that 90% of internet posters are the one that are having a problem. The vast majority - those who dont have issues - dont bother to come on forums and read/post/learn. You've started to ask the right questions, and by using the caluculator, your now one more step further in understanding the parameters involved in making these things work, and, as we've all experienced, dont work. Everyone of us who have lambasted this guy have at one time burnt up a motor or esc or blew up a battery 'cause we did something stupid.

Unsullied_Spy 05.19.2009 10:41 PM

Quote:

Originally Posted by JThiessen (Post 288527)
Seems to me that when you ran the calculator, your balloon factor was a little low - I'd plan on .5 to .75 with those tires.
Someone else correct me if I'm wrong, but his numbers showed about 36K rpm. I try to hit the low to mid 40's for rpms.

Your right - trucks are meant to have big tires. Go have fun with it, quit worrying about everything you read. You'll find that 90% of internet posters are the one that are having a problem. The vast majority - those who dont have issues - dont bother to come on forums and read/post/learn. You've started to ask the right questions, and by using the caluculator, your now one more step further in understanding the parameters involved in making these things work, and, as we've all experienced, dont work. Everyone of us who have lambasted this guy have at one time burnt up a motor or esc or blew up a battery 'cause we did something stupid.

+1. As for the last part I've cooked 2 motors, 3 speed controllers, and a lipo. Live and learn. They've all been expensive mistakes, but they help to realize what you're doing wrong and keep from doing it again. I just hope my screw ups can help someone else from making the same mistake. The most important thing is to watch those temps, if they're OK then you're not overgeared. That Neu has plenty of torque just don't be reckless with it or think it's invincible because they do have their limits.

fastbaja5b 05.19.2009 10:44 PM

Agreed, however I find I don't get a lot of ballooning at all on the stock tyres or the Terrapins (unless I lift the truck up and hammer the throttle)

Freezebyte 05.19.2009 10:50 PM

^ Qwa? You must not be hammering the throttle, my stock GT-2 balloon easily and I put extra CA glue on the things before its maiden voyage.

fastbaja5b 05.19.2009 11:06 PM

lol perhaps I need to reset my endpoints on the TX

Might be goin at 80% throttle without realising it (That's happened to me before)

Freezebyte 05.19.2009 11:10 PM

Quote:

Originally Posted by fastbaja5b (Post 288547)
lol perhaps I need to reset my endpoints on the TX

Might be goin at 80% throttle without realising it (That's happened to me before)

And we both know thats a very big no no according to Castle.

fastbaja5b 05.19.2009 11:17 PM

I better change it then before any more runs!

Freezebyte 05.20.2009 04:18 PM

Ironic to see Castle has not commented on this. :no:

shaunjohnson 05.20.2009 04:52 PM

if you made a revolutionary new type of computer....would you like to listen to people b***h about it?
or would you like to listen to the few people who had an eagle tree recorder running during the failure?

shaun

Aceldama 05.20.2009 04:55 PM

Quote:

Originally Posted by Freezebyte (Post 288694)
Ironic to see Castle has not commented on this. :no:

Comment on what? The moron from the Savage forum who did everything wrong?

JThiessen 05.20.2009 06:19 PM

Quote:

Originally Posted by Freezebyte (Post 288694)
Ironic to see Castle has not commented on this. :no:

I wouldnt have either.

fastbaja5b 05.20.2009 08:30 PM

Quote:

Originally Posted by Freezebyte (Post 288694)
Ironic to see Castle has not commented on this. :no:

Damnit boy what do you think this is a Castle Creations support forum? .. oops :)

Seriously if you bought a Camry, and somehow managed to fit Landcruiser wheels on, do you think you'd get warranty when you blew the engine trying to gun it in 5th gear?

redshift 05.20.2009 09:57 PM

Quote:

Originally Posted by fastbaja5b (Post 288758)
Seriously if you bought a Camry, and somehow managed to fit Landcruiser wheels on, do you think you'd get warranty when you blew the engine trying to gun it in 5th gear?

Thank you 5b for some real world logic!

'Freezebyte wrote: "I refuse to believe that 2200kv will have a hard time powering 40 series wheels"

...Your beliefs won't change the facts and physics, if you choose this road you will likely find out the hard way (with your wallet) that RC is NOT an "out of the box" affair. These companies naturally have their 'extreme' promotional videos to woo and yes, even mislead the consumer that these trucks will take unlimited abuse 24/7 and all you gotta do is charge lipos.

You think it's odd that Castle has not responded when you are making an example of a THIRD party's experience, who looks to be a C.F.M.

This hobby is worth the time and effort it takes, getting worked up over someone else's stupidity is not.

TexasSP 05.20.2009 10:49 PM

:rofl::rofl::rofl::rofl:

This is to the last two posts! Classic, both of them!

REVO 46 05.22.2009 02:44 PM

Would 48/15 be alright on 6S with big joe's? The manual recommends 25t pinion on 6S what's up with that?

Unsullied_Spy 05.22.2009 02:49 PM

Quote:

Originally Posted by REVO 46 (Post 289180)
Would 48/15 be alright on 6S with big joe's? The manual recommends 25t pinion on 6S what's up with that?

I'd start with that, but CHECK THOSE TEMPS!!! If you don't have a temp gauge get yourself a Duratrax Flashpoint. I bought one 2 years ago and it has been extremely helpful. If you notice it's getting too hot too fast then you've got a gearing problem (most likely overgeared, it'd be tough to undergear a Flux with Big Joes).

lincpimp 05.22.2009 03:14 PM

Quote:

Originally Posted by REVO 46 (Post 289180)
Would 48/15 be alright on 6S with big joe's? The manual recommends 25t pinion on 6S what's up with that?

The manual gear chart just indicates what speeds you will get with what gearing, it is in no way a recommendation to run that gearing or an indication that the equipment will last.

Heavier/larger diameter tires require less gearing to maintain the same load on the motor. Any setup requires x number of watts to move, if you add more weight to the tires that number of watts required will go up. To get it back to the original output you need to lower the gearing!

I have no idea why people have such a hard time getting their minds around this... If you add more voltage the motor spins faster and the tires go around faster too, and if something goes faster it must be producing more power...

REVO 46 05.22.2009 03:14 PM

Thanks man, yeah I've got a flashpoint. What's too hot for the motor, esc and battery just to be safe. :)

Unsullied_Spy 05.22.2009 03:18 PM

Quote:

Originally Posted by REVO 46 (Post 289191)
Thanks man, yeah I've got a flashpoint. What's too hot for the motor, esc and battery just to be safe. :)

I try to keep all my motors below 160, normally more like 150. ESC should be fine below 180. If yours is getting that hot something is wrong though because the fan should keep it under 160. I try to keep my lipos under 120, if I see 120 at the shrinkwrap I give them a few minutes to cool off because the cell temp will be hotter than that.

REVO 46 05.22.2009 03:24 PM

150, 180 & 120 OK, thanks for the help.

Freezebyte 05.22.2009 04:03 PM

Quote:

Originally Posted by Unsullied_Spy (Post 289192)
I try to keep all my motors below 160, normally more like 150. ESC should be fine below 180. If yours is getting that hot something is wrong though because the fan should keep it under 160. I try to keep my lipos under 120, if I see 120 at the shrinkwrap I give them a few minutes to cool off because the cell temp will be hotter than that.

Uhh Sully, the fan kicks in at 150F and beyond that I think the thermal protection kicks in. :neutral:

Unsullied_Spy 05.22.2009 04:09 PM

Quote:

Originally Posted by Freezebyte (Post 289202)
Uhh Sully, the fan kicks in at 150F and beyond that I think the thermal protection kicks in. :neutral:

IIRC the fan comes on at 140. If you're getting much more than 160 than the fan is either damaged or not capable of handling the heat. If it can't handle the heat you're most likely pulling WAY too many amps.

Freezebyte 06.03.2009 02:15 AM

Looks like he got his ESC replaced. Curious to see what happens now... :neutral:

http://www.savage-central.com/module...r=asc&start=60

glassdoctor 06.03.2009 03:06 AM

IMO, Castle is off the hook for the Flux esc, the minute a guy slaps on the huge tires, etc.

Good lord, this is not Castle's fault. If they choose to warranty this at all, props to them. But this is not an opportunity to bash the mfg!!!

Pardon me while I get on the Ford forums to complain... I totally smoked the clutch on my '93 Escort GT after only 3 mile trip across town in stop and go traffic. I was pulling my 21' ski boat to the lake... hit third gear WOT and it just started slipping and smoking.... arg!!!

TexasSP 06.03.2009 09:20 AM

:rofl::rofl::rofl::rofl:

That was classic GD, thanks for the morning laugh!

Andrew32 06.03.2009 09:34 AM

Quote:

Originally Posted by glassdoctor (Post 292515)
IMO, Castle is off the hook for the Flux esc, the minute a guy slaps on the huge tires, etc.

Good lord, this is not Castle's fault. If they choose to warranty this at all, props to them. But this is not an opportunity to bash the mfg!!!

Pardon me while I get on the Ford forums to complain... I totally smoked the clutch on my '93 Escort GT after only 3 mile trip across town in stop and go traffic. I was pulling my 21' ski boat to the lake... hit third gear WOT and it just started slipping and smoking.... arg!!!

:lol::lol:

Unsullied_Spy 06.03.2009 01:11 PM

Quote:

I'd like to clear one thing up, I did not lower the EPA it's 100%. But I'll admit it's my fault. The gearing and that stupid filter idea have killed it. But HPI need to have more and better info in the manual. Because if the manual is right, I've geared down 5 teeth(20%) running the stock 20t pinion over the recommended 25t. There's no way the motor or esc got over 135* on the first two runs I was checking it. Yes I have a temp gauge. Thanks Freeze for the link. There's a few arseholes at the MRC forum isn't there.
Well at least he can admit he is the fault (and the HPI manual). Calling us names doesn't do him any good though, we weren't the ones that told him to fry his ESC but rather explained why he cooked it. There's a reason I tell everyone to check their temps all the time when trying unknown gearing combos and that's because you could fry something if you push it too hard.

TexasSP 06.03.2009 04:28 PM

The guy obviously had a piss poor attitude to begin with which is obvious by his posts. If he would have used some tact and not cussed like a 13 year old more people would have helped him. I have always found out that most of the time life is 90% attitude. That's why I like this forum, everything runs on an even keel and the attitudes are kept in check. No one with a bad attitude lasts long here no matter what knowledge they bring.

Unsullied_Spy 06.04.2009 01:09 AM

Quote:

Originally Posted by TexasSP (Post 292641)
The guy obviously had a piss poor attitude to begin with which is obvious by his posts. If he would have used some tact and not cussed like a 13 year old more people would have helped him. I have always found out that most of the time life is 90% attitude. That's why I like this forum, everything runs on an even keel and the attitudes are kept in check. No one with a bad attitude lasts long here no matter what knowledge they bring.

+1. It was nice that he could at least man up and accept responsibility for it, but he definitely over-reacted to it blowing out.

lincpimp 06.04.2009 01:28 AM

"There's a few arseholes at the MRC forum isn't there."

He has no idea... The few we have here would run this dork off so fast...

suicideneil 06.04.2009 11:37 AM

Run him over more like, I'll give him arsehole (not like that, you know what I mean..).

lincpimp 06.04.2009 11:58 AM

Quote:

Originally Posted by suicideneil (Post 292854)
Run him over more like, I'll give him arsehole (not like that, you know what I mean..).

With offers like that I am sure that he will stay away. Nice to get to know you better Neil...

glassdoctor 06.05.2009 12:03 AM

donkey puncher LOL


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