is it normal for this to kinda hot? i was playing with my heli inside the house since its so windy outside, and all of a sudden i could hear a drastic change in the rotors speed and it slowed down, i could still get it to come off the ground, but it didn't sound like it did. so i stopped and touched the esc and it was pretty warm, but i could keep my finger on it without having to remove it. then i checked voltage on battery and it was around 11.5 volts. i have 2 battery packs and earlier outside on my first battery pack my heli did fine, but i was outside where it was about 55 degrees and not as windy, so i came up with a few possible probs, outside being cooler it keep the esc from getting to hot (if that even matters) or in the house maybe their is interference causing it. or the battery pack is bad(2nd flight with it) it happend more than once, i would let the heli sit for a sec, then spool back up and it seem normal again and then in about 30secs you could hear it slow way down again?? so then i took it outside where its about 67 degrees now, and it did fine for about 5 mins then i could tell it was running out of juice and i checked the battery and this time was at 9.7volts. so any suggestions as to what it was would be much appreciated. i guess my main questions are, can the esc get to hot, and if it can will it slow the rotor blades down quite a bit, and can interference cause a problem like this?

I don't think it's interference at all. Say which model you have?
HBK2 is known to have pretty bad motor and Belt-CP is known to have pretty bad ESC.

It could also be your battery.
The battery cut-off from revolving us 9.5v I think. If it drops below 2.54v fore ecah cell, your battery is gone.

belt-cp

i guess when the other battery finishes charges, i can try it in the house, that way it will be the same tempt, and if it does it again, its prob the esc, and not the battery

well if another battery does the same, I strongly suggest you to buy a new ESC probably 30A not from esky.
Also don't fly til it arrives. It's very worth the wait.

[I didn't wait for main gear and lost 30 i didn't wait for feathering shaft and i lost 15 ... Don't learn the hardway.]

well i just did the other battery pack and after 2 mins i could hear it really decrease in the sound the roto makes, but it still lifts the heli off the ground at about the same throttle input?? how hot do the esc normally get? i took it outside again and it seemed fine untill the battery got low. if i don't have to use esky,and if i do really need another one(i mean i'm just hovering for like 5 secs at the most a foot off the ground) my local hobbystore prob has one i could buy. i know they carry eflight stuff if that will work. i still don't understand how it still lifts up and scoots on the floor just as easy, even when i hear the speed decrease. maybe its just because i'm in the house surronded by walls that it just sounds louder in here than outside and its a normal decrease just from all the fresh juice of being fully charged? i dunno

also what does an over-heat protection do on an ESC? would it slow the heli down like mine?

well over-heat protection does slow your heli down. It cuts off current to the motor when it hits certain temperature. You can re-program it somehow but i don't know.

Like you said before if your ESC is hot after flight, you may want to change the ESC pretty soon. I had my belt-cp esc melting side of my frame. I believe Eflite ones could work.

does anybody know how to reprogram it??

what is making it hot? just not a good esc? i've been checking the side of my frame so far it still looks normal

will any esc 25 or 30 amp for brushless motors work?

and one more thing what does it mean to have brake on or off on an esc?

i just talked to an online chat at xheli.com and they said that the esc i have is not programmable. so i guess it don't have an overheat cuttoff. i'd hate to buy another esc and it not solve the prob.

its prob not overheating anyways if i can touch it with my finger and not get burned?

well I would call it overheating if I put candle wax on it and if it melts, I wipe it off quickly and make a mental note [overheating]
Well nothing you're losing there for getting another ESC.
Stock Esky ESC will go sometime. Look into beginners forum and there are like 4 or 6 cases when stock ESC burned frame, motor and battery.

You can also ask Jaketrouble what happend when he changed his HBK2 ESC with Belt-CP's.

Other and easiest option is to watch this clip then the part 2:

http://youtube.com/watch?v=c35lyJnAd5I

Been messing with electric helis for the past five years. I have about 4 Belt Cps and about 5 King2s , several Coronas, many Honeybee cp2s/Blade Cps , MX400, Zooms, etc...etc... have close to 30 helis if not more.
The issue with the belt Cp is the ESC. They give you a cheapie 25 AMP esc. You should at least be using a 30 or 35 amp ESC. The King2 going brushless would be a candidate for the 25 amp ESC. At best, you are boarderlinning the ESC.

It is also common knowledge that the motor bolts on the beltcp (not all) were to long installed at the factory which barely made contact with motor windings which also in turn shorted the esc, causing a fire and at the least heavy smoke. It happened to me twice before I found out.

well darthdrk, this will help me and may helpscooby too. Which brand ESC would you suggest then?

so is that why it does fine outside where its cooler and wind blowing vs in my house where it can get alot hotter?

I think Castle creations ESCs are pretty good but are moderately priced(They have good customer service too). If you are trying to stay on the cheap (price wise) the Dynams work pretty good for the money Some have soft starts and some are so-so The cheapest Dynam ESCs can be found at www.Dealextreme.com (DX) Since I have a bunch of helis I cant afford to best of the best for as many as I have but so far I havent had a Dynam 30 amp on any of my 400-450 size birds go bad or even overheat. DX was also selling a cheap program card for the ESCs too. I hover my helis in the house sometimes and still no heating issues.

how hard is it to install a new esc, programming wise? are they ready to go or do you have to program them? can you program any esc with the esky stock tx?

ESC: http://www.dealextreme.com/details.dx/sku.4488
Programming card: http://www.dealextreme.com/details.dx/sku.5428

do you have to have the card, and can i use my controller to program it(which is what i would rather do)?

I used the card, it was really easy. I do believe you can use the TX pretty easy also.

well i went outside and did an early flight while it was 50degrees outside and no problems at all, i touched the esc and it was barely warm(not nearly as hot as when i fly inside), so i 'm guessing its getting to hot since it does fine outside and messes up inside.

well you really do want a 30A because say if you put max throttle for like 5 or 8 seconds, it's not only your esc that's gonna go. your motor, battery for sure then main frame and all from crashing.

Yep, youre not going to be able to do any hard flying at all.

just got back from my local hobby shop, and all they had was eflight 40 amps, and a kontronik 45amps, so i got the kontronik, the guy at the shop said 45amps won't matter, but before i install it i wanna know is 45 amps bad or is it okay? and also the three wires that go to the motor are bigger, so how am i suppose to hook it up to the motor now?

also the wires on the esky motor are red blue black, and the ones on my esc are red green and blue, it that order side by side.

so would i hook up red to red, green to blue, and blue to black?

When i got my belt cp, the same thing would happen. It was a problem with the esc. It would do the exact thing as yours. It has a temperature stop, but it was set at a too low temperature.... . I changed that and it was fine

I don't think anyone's got a clue on how to do that... At least you got red green and blue.. my 30a esc has all 3 plugs blue A B C and i'm totally lost lol.