RC-Monster Forums - I killed it... MMMv3 bit the dust

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- Castle Creations (https://www.rc-monster.com/forum/forumdisplay.php?f=34)

- - I killed it... MMMv3 bit the dust (https://www.rc-monster.com/forum/showthread.php?t=16234)

If possible when you send the Monster in, put a note in it for them to send it straight to Mike. I am curious to see what failed. We have been pushing these things in some really extreme setups for the last couple of weeks with no failures. (other then broken cars from driver failure :) )

Quote:

Originally Posted by castlemike (Post 227610)

(other then broken cars from driver failure :) )

I thought y'all had stopped letting Patrick drive! :lol:

Quote:

Originally Posted by castlemike (Post 227610)

Will do sir....you guys are the greatest

can a mod please change the title of this thread to "I killed it"......I would say its my fault also but you would think if the esc only got to 170deg. that it should have lived?

Quote:

Originally Posted by TexasSP (Post 227613)

I thought y'all had stopped letting Patrick drive! :lol:

We only let him drive when he holds that "I'm the owner of the company" thing over our head. :rules: We did figure out that doing 60+mph speed runs in a small parking lot full of cars is kinda stupid. I have had to replace the front end on our RC8 conversion 3 times in the last couple of weeks.:oops:

Quote:

Originally Posted by bustitup (Post 227618)

Not sure how you was getting the temp readings, but if you was reading 170 outside the case it was probably way over that for actual temp. Still should not have failed for that reason though. I would guess the overstressed batteries were more the factor then anything else. Send it in and I'll figure out what failed on it and get you fixed back up.

well I'm making an attempt to see if the wires are pinched....I took off the bottom label sticker and there is an oily rust colored residue seeping from the seams of the esc....but I still cant figure how to get it to pop open ....I dont want to break anything

Quote:

Originally Posted by bustitup (Post 227618)

can a mod please change the title of this thread to "I killed it"......I would say its my fault also but you would think if the esc only got to 170deg. that it should have lived?

How's that?

Quote:

Originally Posted by castlemike (Post 227624)

used this mike PE1 INFRARED THERMOMETER TEMP GUN

take a look...see the oil droplets on the cover and the inside of the case has like a sandy gritty substance...you can see it good on the wires where they run out the case

http://www.rgcbuilders.net/esc.jpg

http://www.rgcbuilders.net/esc2.jpg

It looks like sand/water found its way in through the various small gaps in the case. No ESC I can think of will be immune to this unless the circuit is encased in a watertight box, or maybe a epoxy blob...

ummmm...maybe someone was eating a really really greasy burger...with sand over the production line?:lol:

Quote:

Originally Posted by hoovhartid (Post 227511)

hey man,
I'm gonna go out on a limb here and say that gearing a 12lb truck for over 70mph....
...you're only gonna be able to do a few speed passes before a need for cool down.:whistle:

dude:diablo: you're mean to your electronics.

Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.8333333333333332
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 24
Total Voltage: 22.2
Motor KV: 2700
Tire Diameter (inches): 5.9
Tire Ballooning (inches): 0
Motor Current Draw: 120
Motor coil Ω: 0.004
Spur/Pinion Ratio: 2.42 : 1
Total Ratio: 12.61004 : 1
Tire Circumference (inches): 18.54 inches (470.8 mm)
Total Motor Speed: 58644 RPM
Vehicle Speed: 81.63 mph (131.12 km/h)
Estimated Adjusted Speed: 72 mph (116 km/h) - 11% loss
Effective KV Value: 2641.62
KT constant: 0.5 oz-in/A
Motor Torque: 0.31 ft-lbs
Final Torque: 3.95 ft-lbs
Final Power: 2664 watts (3.6 HP)

not to say I wouldnt still hold the camera and wear the shin guards:lol:
call me up if you need a videographer!

Till i saw the inside of the case, I was wondering and still wondering. The bold and underlined part makes me wonder, whats the theorettical RPM of the mamba monster on 2 pole motors? The RPM shown would be 117,328 RPM's as seen by the esc due to being on a 4 pole Neu. I am wondering what the RPM or phase shifts the esc can handle. I hope thats understandable

Good point crazy.

Of course the inside of the case looks like someone sniffed sand then sneezed into it which is probably the failure.

I just got back after a long hard run in the park today and the V2 with updated firmware hung in all the way. Someone was nice enough to leave me 8 mounds of dirt/rock mix all next to each other to jump so it was fun to say the least. The fan would come on but when the truck stopped it shut down every time in less than 10 seconds.

I was thinking voltage ripple until I saw the pic of the insides!