Model Boat Mayhem

Technical, Techniques, Hints, and Tips => DC Motors (Brushed) and Speed Controllers => Topic started by: Ben Tickle on September 11, 2010, 06:25:23 am

Title: Fuse
Post by: Ben Tickle on September 11, 2010, 06:25:23 am

Hi,

I have a fast electric speed boat, and was wondering if it would still need a fuse? I have been told not by one source. I am currently running a graupner speed 700 motor (9.6v) and a Jeti Navy 600 speed controller.

Could i please have some more opinions?

Thanks

 {-)

Title: Re: Fuse
Post by: barriew on September 11, 2010, 07:30:54 am

Which would you rather replace - a 10p fuse or your ESC, or possibly the whole boat if the ESC catches fire? I fuse between motor and ESC and between battery and ESC. Better safe than sorry.

Barrie

Title: Re: Fuse
Post by: Ben Tickle on September 11, 2010, 09:39:32 am

I have added a fuse to my boat for when the power is entering the speed controller. Unless the esc has an amplifier in it then the motor and speed controller should not go above its intended use.

Thanks

Title: Re: Fuse
Post by: Prophet on September 11, 2010, 10:22:13 am

add a fuse, who ever told you not to, take them outside and hit them with somthing heavy  <*< fuses will save you so much money in the long run on ANY boat! esc's blowing up (catching fire) is a real reality! ya sure i understand if the fuse blows you might not be able to retrive your model via the remote but what would you rather a fire on board and boat stopped so you can't retrive anyway it will burn and sink, or blowing a fuse and let it drift untill you can rescue it?

Barriew's right 10p or £50 or worse new boat!

Title: Re: Fuse
Post by: derekwarner on September 11, 2010, 10:37:39 am

 %%...just thinking....possibly we should ask a professional about fuses.....slow burn.....high temp????

Could you please offer a constructive comment here FLJ ....from ACTion........ O0 Derek

Title: Re: Fuse
Post by: nick_75au on September 11, 2010, 10:42:32 am

Most FE guys do not fit a fuse as they are drawing currents well above standard fuse ratings and it introduces unwanted resistance, what they do fit though is a safety loop in the battery side of the circuit which can be pulled without untaping the hatch.
They also data log currents so their setups dont draw more than components can handle.

In my experience the fuse has not protected the ESC because its usually the ESC that faults as a dead short. The fuse only stops the fault current from continuing to flow, preventing further heat damage(fire) and battery damage.  

Your brushed motor should draw less than 30 amps so standard Auto fuses can be used.

Nick

Title: Re: Fuse
Post by: Shipmate60 on September 11, 2010, 12:32:38 pm

I wish I had fitted a fuse!!!!

Bob

Title: Re: Fuse
Post by: DickyD on September 11, 2010, 12:57:14 pm

Is that the only photo you have Bob ?  ;)

Title: Re: Fuse
Post by: Shipmate60 on September 11, 2010, 04:26:29 pm

Its the ONLY time I have had ant problems.
Surprisingly I dont make a habbit of burning out ESC's.
So to answer your question yes it is the only picture I have of this.

Bob