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5 amp quick fuse - 4/12/2004 2:30:54 PM   
zeeshan


 

Posts: 203
Joined: 2/4/2004
From: london, UNITED KINGDOM
Status: offline 		hello i have noticed that people have been talking about a 5 amp quick fuse (jbalt) which they have installed on there helicopters so that there boards wont blow just the fuse i was wondering how to do this i would like to uput one in.
thank you
       Post #: 1

RE: 5 amp quick fuse - 4/12/2004 2:47:44 PM   
jbalat



Posts: 269
Joined: 3/3/2004
From: MelbourneVictoria, AUSTRALIA
Status: offline 		Here is the pic again if you missed it. I blew another fuse on Friday when my brother in law flipped the heli on its side and didnt know how to cut the throttle. Bad news is that he broke a linkage so Im grounded for a while. Good news is I dont need another board...

I know I sould not have let him try but I was curious to see what he would do. Besides I thought I would have the zoom going by now.

P.S. The fuse was not my idea, I found it on the forum in a post ages ago.

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(in reply to zeeshan)
       Post #: 2

RE: 5 amp quick fuse - 4/12/2004 4:29:05 PM   
zeeshan


 

Posts: 203
Joined: 2/4/2004
From: london, UNITED KINGDOM
Status: offline 		so did you put the fuse on the red or the black wire also do you do it from the power (female socket) from the pcb boaerd or the 3in1 i have the aerohawk will it work on that thank you can you post some more pictures.

(in reply to jbalat)
       Post #: 3

RE: 5 amp quick fuse - 4/12/2004 5:40:45 PM   
FHHuber



Posts: 4931
Joined: 1/1/2003
From: gone, , USA
Status: offline 		It won't matter if its on the red or the black lead... its NORMAL to put it in the red lead. (all your car's fuses are in the + leads to the things they are associated with)

Both the red lead and the black lead see the same current at the battery connections and breaking either wire will stop the current... so... for this purpose there is no difference.

(in reply to zeeshan)
       Post #: 4

RE: 5 amp quick fuse - 4/12/2004 8:37:03 PM   
zeeshan


 

Posts: 203
Joined: 2/4/2004
From: london, UNITED KINGDOM
Status: offline 		how did you make a holder to hold the fuse there is no point in soldering it on also why would it pop is it because suddenly a power surge would be sent up it and then it shall stop it or otherwise thank you.
FHHuber do you also have this system installed

(in reply to FHHuber)
       Post #: 5

RE: 5 amp quick fuse - 4/12/2004 9:06:01 PM   
FHHuber



Posts: 4931
Joined: 1/1/2003
From: gone, , USA
Status: offline 		I've put fuses in line in assorted electric drive systems. You go to radio shack (or some other electronics supplier) and get an in-line fuse holder. Buy the fuses at the same time and you'll be sure you are getting a holder and fuses that work together. You solder the fuse holder in the line and then the fuses are easy to replace.

The motor being stopped by something (the heli crashing on its sde and the rotor being stopped by the ground with throttle left on) reduces the inductive resistance in the motor. This allows the current in the motor to SUDDENLY rise as the motr attempts to draw the power needed to get moving again. The little 4 amp continuous rated motor suddenly tries to draw 10 to 25 amps. That high current will quiclkly destroy the electronics if you don't have a fuse in line to protect them. If it was using the old mechanical-resistance type speed control the motor itself would burn up befor ethe speed control. With the micro helis and modern ESC systems in cars and fixed wing electric models, sometimes its debateable which to expect to burn out first... the motor or the ESC. (either can burn out... sometimes both.)

It only takes a second to fry the circuit board from over-current. The fast acting fuse can prevent that.

(in reply to zeeshan)
       Post #: 6

RE: 5 amp quick fuse - 4/13/2004 8:18:13 AM   
jbalat



Posts: 269
Joined: 3/3/2004
From: MelbourneVictoria, AUSTRALIA
Status: offline 		If you have a good look at the photo, I have soldered the fuse holders on so that the fuse is removable...
It is on the red battery wire.

(in reply to FHHuber)
       Post #: 7

RE: 5 amp quick fuse - 4/13/2004 2:25:47 PM   
zeeshan


 

Posts: 203
Joined: 2/4/2004
From: london, UNITED KINGDOM
Status: offline 		did you extend the wire on the aerohawk it is extremly small

(in reply to jbalat)
       Post #: 8

RE: 5 amp quick fuse - 5/6/2004 6:15:26 AM   
justin_92_92



Posts: 800
Joined: 2/21/2004
From: upstate, NY, USA
Status: offline 		I reead on my pixi20p it says.... DO NOT INSTALL FUSE BETWEEN THE BATTERY AND THE ESC. THIS COULD RESULT IN LOSS OF CONTROL. it says to put it between the esc and the motor. I know on your stock jabo thats not an option but for seperates it is. this will help the same way rite?

_____________________________

-Hobby Dealer

(in reply to zeeshan)
       Post #: 9

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