Finally cooked my stock esc BJ 26

[CodeRed225]

I have enjoyed running My Blackjack 26 on 6s for a few years now knowing that this day was going to come. I just finished filling in the last step in the hull and went to the lake to try it out... I made one turn and poof. Dead in the water, then I saw the smoke. I thought it was going to burn up.

So here I am ready for new electronics. I am thinking of getting a seaking 180a or a 120. I am set on 6s because I already have the batteries. What about an aquastar 120. Havent read much about them but there is a cheap one for sale.

Motors I am really lost on. I am trying to figure out what everything means, Kv, pole, sizes, and the wind? Makes it hard to decide what is right for me. I have been trying to search the forums but if anyone has a good link that breaks down the motor specs that would be helpful.

I just run for fun, with a couple of friends. Trying to keep up with a Miss Geico and King of shaves. Money is not a problem but I don't want to throw good money at bad if you know what I mean.

Thanks, Red

[Heaving Earth]

For 6s you want 1500kv or so. Shaft size 5mm
Can size 36mm should be good. Seaking is nice. 180 or 120 will work.
Don't know about aqua star, I'm sure it's decent tho. Never used one

[Heaving Earth]

Wind type will designate your timing btw. That's not something that will affect your decision of which motor. You want kv right then appropriate sized motor can. Your boat won't benefit from anything larger that 36mm can size. Hope this helps

[kendt]

Burned esc. Thats a smell you dont soon forget.

[CodeRed225]

So the Kv matches up to the 6s? What would difference would higher or lower rating effect? Then the can size... that is related to power? Or simply size and weight?

Does anybody know anything about the aquastar 120?

Pics of my charcoaled esc. That smell is horrible!

IMAG0028.jpgIMAG0029.jpgIMAG0027.jpg

[CodeRed225]

Burned esc. Thats a smell you dont soon forget.

Stayed with me for days!

[kendt]

The kv's of that motor put you at some pretty high rpms. Not that it is automatically a bad thing but it means you need to aproach it a bit differently. Not sure what the wattage of those motors are but they likely wont handle a ton. Its amazing that the esc lasted that long lol. You have to go with smaller props with higher rpm set ups or you will be burning things up like crazy.Lower kv motors you got more room to play with prop size and they are a bit more forgiving.If you want to stay with this kind of set up take a look at these motors.http://www.hobbyking.com/hobbyking/s...90mm_EDF_.html
There is a vid there of one in a apparition and it screams. There are also some vids on ut of people using them in mg's etc. They are awesome little motors. People are using 120 a esc's with it but i've been testing one on a 30" tunnel and its pushing my t120 to its limits so 180 would be a much better choice. The aquastar esc's are made by swordfish so they are pretty good units. A 3674 size motor is a good fit for that hull but more limited in wattage. 4074 is heavier but handles more power.

[CodeRed225]

Thanks for the input. I was surprised how long the stock esc held up also. So I could probably run my stock motor for now and go with the seaking 180. I'm currently running x642, but I would like to try some 45mm props.

So lower Kv equals lower rpm? This in turn puts less load on motor or esc, or both.

[kendt]

ya the 180's are pretty bullet proof and would be perfect. Just keep an eye on motor temps when you start going up in prop size. If you smoke the motor it may take out your new esc as well.

[CodeRed225]

Okay I went to order the seaking180 and I see there is two different ones. Which one do I need? There is a 60 dollar price difference so it has to be significant. I just can't tell from the description which I want.

[kendt]

Where are you looking. thats a huge price difference. as far as I know there is only one version available.

[CodeRed225]

Right here on OSE parts

[Alexgar]

I have a swordfish 120 older version I have run on 6 s with a 1500 proboat motor quite q few times using the bec and haven't had problems yet

[kendt]

I see what going on. The second one is 130a with a 180 burst but its hv model. You want the one that is 119.00

[J.W. Pepper]

Hey CodeRed

Since nobody on this forum seems to be able to give to people simple answers to their's question(s), I'll do it.

For reasons that I don't understand, Proboat (Dynamite for newer models) calls they're brushless motors A3630, to add confusion to the mix they do it with two different motors The Shockwave 26 BL has a A3630, my Impulse also has a A3630, so what's the difference?? The Shockwave's motor is 1500Kv, the Impulse motor is 1800Kv.

The rest of the world would have listed those motors like this 36-56-1500 or 36-56-1800. That system is used for all car/ truck brushless motors, and by the vast majority of the manufacture's of boat motors.

So here goes...
36 = the diameter of the can / housing of the motor itself, nothing more, nothing less.

56 = the length of the can / housing of the motor itself. Generally speaking, longer cans result in a motor producing more torque. That will make the motor draw more current (amps) which means you'll need an ESC with a higher amp rating.

1500 / 1800 = the KV rating of the motor. The KV rating of ALL brushless motors means just one thing, RPM's per volt. Using your boat for an example...
1500 x 22.2volts (6S) = 33,300-RPM's unloaded, aka not spinning the prop. That is a very serious amount of RPM's for a non race boat.

For reference the AquaCraft UL-1 race boat has a 2030Kv motor running on 4S = 30,044rpm's, and boat is stupid fast out of the box, I've seen the vids.
Guess some people think any FE boat going less than 90mph is slow.

30,000rpms is pretty much the upper limit for boats. You said your committed to 6S, so you might want to consider getting a motor with a lower KV rating to bring down the RPM's. A 1400Kv = 31,080rpm's, 1300Kv = 28,860rpm's - much more sensible for sport boating.

I'm not going to offer motor suggestions, the purpose of this post is to answer your original question(s)... IE: what do the numbers mean.

Wind type, as someone else said, only affects timing. To date nobody has been able to tell me what the difference is between a "y" or "D". Here's a list of boat motors showing the various wind type's... http://www.offshoreelectrics.com/pro...Leopard+Motors - looks like alphabet soup to me.

ESC's - given that your committed to 6S, don't bother with anything less than the Seaking 180A unit. Other compainies make higher amp units, but they tend to be spendy - well into the $200 range.

Last but not least, I encourage you to read post #1 of this thread... http://forums.offshoreelectrics.com/...6S-won-t-work! - Darin is extremely knowledgable, he's designed some of Proboats' models (including the Impulse's), and is an avid R/C boat racer. Think it's safe to say he knows what he's talking about.

Hope that cleared up any confusion caused by the OSE "experts".

Happy boating.