What is this BS Castle is feeding this customer?

[BrianG]

GD: How many of those MMs are functional?

[glassdoctor]

All but one... and that one someone else murdered LOL

I did kill a couple myself last year but they have been replaced. :)

[glassdoctor]

I would like to thank my sponsors again since I have not mentioned them in a while.

Mastercard
Discover
and honorable mention goes to my Visa, and my wife.

[lincpimp]

I would also like to thank my wife, who does not believe that I have $1000 worth of rc yet....

Can you imagine how hard it was not to laugh when I heard her say that....

[glassdoctor]

Originally Posted by lincpimp

I would also like to thank my wife, who does not believe that I have $1000 worth of rc yet....

Can you imagine how hard it was not to laugh when I heard her say that....

yep honey... but I'm sure it's getting pretty close to that.

[skellyo]

Originally Posted by lincpimp

I would also like to thank my wife, who does not believe that I have $1000 worth of rc yet....

Can you imagine how hard it was not to laugh when I heard her say that....

Unfortunately, my wife has a pretty good idea what I've spent on RC in the past few years.

I did have to tell her this morning though that I have yet another MMM on the way. Luckily, she was pretty cool with it. Somehow I also managed to not get killed telling her that I have a Slash and E-Revo on pre-order too. My wife must love me or something.

[bl-is-future]

Originally Posted by skellyo

Unfortunately, my wife has a pretty good idea what I've spent on RC in the past few years.

I did have to tell her this morning though that I have yet another MMM on the way. Luckily, she was pretty cool with it. Somehow I also managed to not get killed telling her that I have a Slash and E-Revo on pre-order too. My wife must love me or something.

Lol yeah my Fiancee is the same way. She asked the other day how much i have in all my toys, i just laughed. I have more toys than RC so it is really really hard to tell. I love it all though, dont regret buying any of it one bit.

[DRIFT_BUGGY]

Got all the gear now to get mine up and running (including the MMM), might get it up and going tomorrow but not sure if I will get time, still abit scared about trying it out, might end up with a broken heart

[sleebus.jones]

Originally Posted by DRIFT_BUGGY

still abit scared about trying it out, might end up with a broken heart

You probably shouldn't turn it on then. Then you won't have to cry like a little girl if it breaks.

[q8-maxx]

I order MMM from mike and now on the way to my box in aramex (company that give me a mail box in New York)
aramex charged from me $30 just for handle it. Ok lets do math now
MMM+tax+shipng to aramex in NY $174 + (aramex) $30 ship for kuwait = $204

Ok When I receive my MMM and the bec stop working. Lets do math again
MMM $204 + $30 (send it to NY for aramex) + $30 (send it cc) + $30 (from aramex NY to kuwait) = $294 plus wait 2 month lol

[bl-is-future]

Originally Posted by q8-maxx

I order MMM from mike and now on the way to my box in aramex (company that give me a mail box in New York)
aramex charged from me $30 just for handle it. Ok lets do math now
MMM+tax+shipng to aramex in NY $174 + (aramex) $30 ship for kuwait = $204

Ok When I receive my MMM and the bec stop working. Lets do math again
MMM $204 + $30 (send it to NY for aramex) + $30 (send it cc) + $30 (from aramex NY to kuwait) = $294 plus wait 2 month lol

That sucks. But...At least castle is reputable enough where they even fix there mistakes. And i heard they are sending a replacement before they even get your broken one. If that is not a good company i have no idea what is. IMO castle will always right any wrong.

[xtremelimits285]

i spent $3,300 last may/june..
i bought my 8T with all new nitro stuff spare clutchs,spre gears, Tires an Rims galor..lol

then i bought lipos and brushless stuff a neu motor new charger an balancer...
(still have my .28 picco & p3 pipe in a box.. lol) an bought some 1/10th scale stuff oh an a new Futaba TX an servos

i could of had my 1990gt vert mustang(building a 427w stroker for it) done and running:(

oooh well rc cars come first..lol
im only 25years old, im still a kid(ok at heart at least)lol

[Sower]

Originally Posted by xtremelimits285

i spent $3,300 last may/june..
i bought my 8T with all new nitro stuff spare clutchs,spre gears, Tires an Rims galor..lol

then i bought lipos and brushless stuff a neu motor new charger an balancer...
(still have my .28 picco & p3 pipe in a box.. lol) an bought some 1/10th scale stuff oh an a new Futaba TX an servos

i could of had my 1990gt vert mustang(building a 427w stroker for it) done and running:(

oooh well rc cars come first..lol
im only 25years old, im still a kid(ok at heart at least)lol

Nice - the funny thing is that you are a "kid" to most of the guys on this forum!

[bdebde]

Originally Posted by Sower

Nice - the funny thing is that you are a "kid" to most of the guys on this forum!

Oh, to be 25 again

[DRIFT_BUGGY]

Just came accross this

The load from the motor determines how much current is drawn from the batteries. Batteries don’t push current, hence you cannot have too large or too high a discharge battery. The ESC, between the motor and the batteries has two jobs. First, it run the motor by analyzing the motors back EMF then sending commutation pulses to the motor based on its analysis of the motor. This involves much more than knowing the position of the rotor, there are several complex algorithms that, by analyzing the back EMF, set the computation pulse advance to get the most power and efficiency of out any motor is it running.

Its second task is to control the speed of the motor to the users command. It does this with Pulse Width Modulation or PWM. PWM works by turning full throttle current on and off very fast. The portion of the pulse that is 'on' in relation to the part that is 'off' determines how much power the motor sees. I.E 50% on, 50% off the motor sees 50% power. The PWM switching rate is 13,000 times per second (13 khz). DC power sources, in this case batteries, do not like high current being switched on and off, they want to put out steady current. The ESC wants to see square waves, instant full on, instant full off. However, the battery takes time to go to full on and won't switch off immediately. This creates a sloped instead of a square wave. The caps on the ESC are there to get the PWM pulse back closer to a square wave. The reluctance of a battery to put out pulsed current also creates a side affect called 'ripple current.' The caps also control ripple current. The less capable a battery is of keeping up with the current demands of the motor the higher the ripple current. If the capacitor overheats or get completely drained from inadequate batteries the caps will burn or blow up and the ripple current cascades thought the power board burning up the ESC. The other primary cause of ripple current is resistance on the battery side of the circuit. A plug with too much resistance, long or too small battery wires, bad connections etc. will increase ripple current, possibly to catastrophic levels. I cannot prove it but my guess is that more of our ESCS are burned up from inadequate batteries than over current.

The minimum discharge rating for cells used with a Monster Max is 75 amps continuous, burst to 150 amps. This is a minimum to keep ripple current low enough to make sure the batteries don’t damage the ESC, more is better. Also, the more capable the batteries the more torque the motor will produce.

To answer the question of why don’t NiMh batteries damage the ESC is the fact that these cells voltage drop quickly under load then climb back. The drop in voltage protects the system from the motor pulling too much amperage and creating too much ripple current.

With high power electrical systems, the battery is the most important part of the system. Saving money on batteries not only gives lower performance, it puts the ESC at risk. Choose your batteries wisely.

Bernie Wolfard
Supervisor, Product Support
Castle Creations
235 S Kansas Ave.
Olathe, KS 66061