Questions from a newbie...

[oldshovelhead]

this is a bit late in the thread - and I know I'm a noob but-
when soldering up deans keep the male/female connected - this helps defuse the heat a bit so the plastic doesn't melt. This way they'll line up and plug in correctly after you've soldered.
hope this helps someone

[Chop]

Cooling fan installation

O.K., I’m trying to install a Novak cooling fan on a Mystry ESC. The fan has a JST plug on it. There is nothing obvious on any of my electrical equipment that has the mating plug.

The Boat runs on 4S lipo’s so the voltage is too high for the fan (5.0v). I believe that I should just splice the fan into the receiver pack by wiring it into a servo extension.

Yes/No, other options???

[Rex R]

I believe that most lhs's that carry rc stuff can help...get a 3" servo extension, lop off the jst plug(off the fan), and the female plug(the end that doesn't plug into the rx) off the extension. match the wire colours and solder the wires together. plug the fan into the rx and you're done :-). hth
rex

[egneg]

Or ... just lop off the the connector and solder it directly to the + and - minus on the ESC with the appropriate resistor on the - side to get 5v. To figure out what resistor is needed you must know the load of the fan either in amps or watts. Then it is a simple matter of ohms law for series circuits.

[egneg]

Sorry - resistor needs to be on the + side.

Edit: now that I think about it - it doesn't matter in a series circuit.

[Chop]

Motor Identification

Okay, I have a number of motors lying around. Some of them have labels on them, others not. How are these motors identified?
Manufacture
Size
Kv
etc.

[screwball]

all i can identify is the feigao and possibly a medusa

[Chop]

all i can identify is the feigao and possibly a medusa

I wasn't actually asking to identify these particular motors, but rather, asking how one goes about identifying a motor.

The large blue one is a KB11XL.

[westbeach]

If there isn't a tag then it's a pretty wild guess. You can measure the can. But knowing what the KV of the motor is a WAG! Unless you setup some equipment to measure the rpm/cell? To get a estimate of the KV. Someone else might be able to give you a more accurate answer. I am curious to know too.

I wasn't actually asking to identify these particular motors, but rather, asking how one goes about identifying a motor.

The large blue on is a KB11XL.

[BHChieftain]

At the top of the screen, there is a link "tips & Info"
There is a wealth of info there including this video...

I hope it helps out!

Just a tip... don't put the shrink tubing over the wires until *after* you have tinned the leads-- the first time I tinned the lead, the entire wire got so hot that it shrank the tubing on me... or get a higher watt iron.... (I was using 40W...).

-Chief

[ozzie-crawl]

hobby king sells a kv tester,does just that tells you kv/rpm of motor
http://hobbyking.com/hobbycity/store...dProduct=10335

[Diegoboy]

Just a tip... don't put the shrink tubing over the wires until *after* you have tinned the leads-- the first time I tinned the lead, the entire wire got so hot that it shrank the tubing on me... or get a higher watt iron.... (I was using 40W...).

-Chief

That is relative to the length of the wire. If the wire is long enough to keep the shrink away, it won't happen. but on short leads, there's no choice. Good call, as it would be a good habbit to get into anyway.

[Chop]

Prop finish

O.K. let's open the scuffing can-of-worms again...
I have understand the principal behind scuffing the bottom of the hull: the rough bottom traps tiny air bubbles making the hull slippery, what about the finish on the propellers?

I have heard that people polish them, but to what degree? Do you use a 220, 300, 400 etc. grade paper or grit?

[JMSCARD]

Dont know if its been said but I keep a small wet sponge to cool of the connector if I think I'm getting it on the verge of melting itself...works well to save from destroying the expensive deans connectors.... I'm all bullets now though... recommend you do the same:)

[Chop]

O.K. let's open the scuffing can-of-worms again...
I have understand the principal behind scuffing the bottom of the hull: the rough bottom traps tiny air bubbles making the hull slippery, what about the finish on the propellers?

I have heard that people polish them, but to what degree? Do you use a 220, 300, 400 etc. grade paper or grit?

Hello Hello Hello...
Crickets chirping...