Burned up Speed Controler

[rocky]

Burned my ESC to a crisp tonight. Don't know why? Hacker/Jetti 99 Navey Master. I need to replace it and I am looking for sugestions. Set-up is Hacker B50-8 XL on 4 cell Lipo in a BBY Hydro.

Anyone have suggestions.

Thanks

Rocky

 

[David Kingston]

What prop was on that motor when it burnt.

I use to run a hacker 99 in 2000 - 2004 till i fried it big time.

Props should be 640 - 645 max in a sports hydro with that motor and ESC. Rigger might be able to pull 48mm if setup correct.

Watch the run time also - long runs heat things up, and make sure the boat is not running wet.

Great ESC replacements are.

MGM - mgm-compro.com.......... best small ESC that i have ever owned is the mgm224, cops hell and still goes for it.

Castle creations 120 - 240amps ESC - hydra

Etti 150amp ESC - proving to be a super ESC. well worth it.

Trunigy also make a nice ESC but ive never owned one so wont comment.

Etti would be my pic for ESC - cost and i dont think you will kill it.

Dave

 

[rocky]

What prop was on that motor when it burnt. I use to run a hacker 99 in 2000 - 2004 till i fried it big time.

Props should be 640 - 645 max in a sports hydro with that motor and ESC. Rigger might be able to pull 48mm if setup correct.

Watch the run time also - long runs heat things up, and make sure the boat is not running wet.

Great ESC replacements are.

MGM - mgm-compro.com.......... best small ESC that i have ever owned is the mgm224, cops hell and still goes for it.

Castle creations 120 - 240amps ESC - hydra

Etti 150amp ESC - proving to be a super ESC. well worth it.

Trunigy also make a nice ESC but ive never owned one so wont comment.

Etti would be my pic for ESC - cost and i dont think you will kill it.

Dave

Dave,

Thanks for the info.

Prop was a Grim 40 x52-3 blade. I don't think that was any to big? I had some new 6000 mha batteries and was not running very hard. Breaking the new batteries. The boat quit in the middle of the lake earlier and I retreived it, opened the battery compartment to check things out. Speed controller was warm, batteries were just barely warm. Taped back up and made a couple more laps and it quit again in the middle of the lake. Thats when I saw smoke coming from the boat. What a stinking, dirty mess inside the boat.

Rocky

 

[talonxracer]

I blew three Hacker Master Navies in my DrifterS and the amp draw wasnt that high at all, temps were decent on the batteries, motor and ESC, went with a Castle aircraft P125 and never had another issue, now that they have the hydra, that is what I would suggest. And you are correct, the smell was nasty and I never got the smell out of the boat fully!

 

[jayt]

The Hacker 8XL is a better motor than the Feiago 8XL and can draw well over 125 amps on LoPos. The 3-bladed prop adds a lot of extra draw to the motor versus a 2-bladed prop, and in a not-so-free-running hydro it could toast a 100 amp ESC quickly. IME the Hacker 99 was not as robust as the old Hacker 77 was.

Another contributor could have been an excessive amount of wire. How much total wire length did the OP have between the ESC board and the battery cells? What kind of connectors did he use? Excessive wire length is a real ESC killer. Running at part-throttle has killed more ESCs than about any other cause - and the OP said he "was not running very hard". The 8XL is a race motor on 4S and as stated above run time should be limited. For sport running a 9XL or 10XL will be plenty fast, will run longer and won't draw too many amps (unless propped silly).

.

.

 

[rocky]

The Hacker 8XL is a better motor than the Feiago 8XL and can draw well over 125 amps on LoPos. The 3-bladed prop adds a lot of extra draw to the motor versus a 2-bladed prop, and in a not-so-free-running hydro it could toast a 100 amp ESC quickly. IME the Hacker 99 was not as robust as the old Hacker 77 was.
Another contributor could have been an excessive amount of wire. How much total wire length did the OP have between the ESC board and the battery cells? What kind of connectors did he use? Excessive wire length is a real ESC killer. Running at part-throttle has killed more ESCs than about any other cause - and the OP said he "was not running very hard". The 8XL is a race motor on 4S and as stated above run time should be limited. For sport running a 9XL or 10XL will be plenty fast, will run longer and won't draw too many amps (unless propped silly).

.

.

Jayt,

After talking with a few poeple today, I believe the biggest factor to the ESC failure was not running very hard. I never knew that running a Brushless motor at 1/2 throttle was harder on it than WOT. Brushless motors are way more effeciant running wide open. That was an expensive lesson learned.

Thanks

Rocky