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Warbird_ace · 07-16-2006, 03:05 PM

Second pack to go on me.

Testing the gyro and servos, plug the battery into the receiver, stupidly, backwards. Yet again, another fancy smoke show with lots of heat, smoke and burnt wiring strewn all over the floor and bench.

Any ideas why this is happening? This was my good heli flight pack too, bought it in April. I wouldn't think plugging it in backwards would do anything cause I've done it before with nothing like this happening.

Note to self, keep a good pair of side cutters on hand.

Cheers

aceplant00 · 07-16-2006, 07:02 PM

Just a thought. You might save yourself some hassle by either

1) Change the connectors to match so they can't be put together backwards
2) Mark your connectors with paint so you know you have them right.
3) Would a switch between the receiver and the pack help or maybe a voltage regulator. Might be to much power from the pack to the receiver.

volksman · 07-16-2006, 07:03 PM

a sudden surge of current is caused by a dead short or very low resistance. putting the negative side of the pack on signal everyone has done that or are these lipolys .

skypupnut · 07-16-2006, 07:54 PM

some futaba receivers ( could be on some others )
have the signal and positive connector shorted together at the receiver batt connector. so when you plug in a batt. pack reversed.
smoke show because of shorted pos and neg batt wires.
your batt pack might still be good if you replace wiring harness
good luck

Warbird_ace · 07-16-2006, 08:00 PM

Standard 4 cell, 4.8V, 1100mAh flat pack.

Skypup, you could be right, I never thought of that. I'll check it out, cause as soon as they touched, it went up.

The connections are still solid, but I haven't checked to see if the cells have split yet. I don't think I'll use it though, for fear of failure.

Cheers

**scaleguy** · 07-16-2006, 11:37 PM

Quote:

Originally Posted by Warbird_ace

Standard 4 cell, 4.8V, 1100mAh flat pack.

Skypup, you could be right, I never thought of that. I'll check it out, cause as soon as they touched, it went up.

The connections are still solid, but I haven't checked to see if the cells have split yet. I don't think I'll use it though, for fear of failure.

Cheers

You should send Rx in to get checked out as well.

Suggestion... buy a battery pack that has a Futaba connector on it if you are using Futaba Rx. That way you can not physically plug it in wrong. Oh and use a switch!

michel gravelle · 07-17-2006, 06:34 PM

Sometimes this hobby makes you pay attention

I know I had it happen a few years ago to me

Hope it works out for you

Michel ( Mike )

moo · 07-17-2006, 06:45 PM

Quote:

Originally Posted by skypupnut

some futaba receivers ( could be on some others )
have the signal and positive connector shorted together at the receiver batt connector

Why? What purpose would this serve? Maybe you are thinking of the DSC receivers that use the signal pin at the battery connector for DSC, this may be protected with a diode.

skypupnut · 07-17-2006, 09:11 PM

no regular receivers like 127df

Warbird_ace · 07-18-2006, 05:59 PM

Where do you send something like that? I do have a switch, but I got lazy and didn't hook it up

Oh well, gotta learn somehow.

07-16-2006, 03:05 PM	#1
Warbird_ace RCC Expert Contributor I am: Adam S Join Date: Mar 2003 Location: Barrie area, ON Feedback: 5 / 100% Posts: 887 Total Props: 1	Bad Battery Luck... Remove this ad - become a site supporter! Second pack to go on me. Testing the gyro and servos, plug the battery into the receiver, stupidly, backwards. Yet again, another fancy smoke show with lots of heat, smoke and burnt wiring strewn all over the floor and bench. Any ideas why this is happening? This was my good heli flight pack too, bought it in April. I wouldn't think plugging it in backwards would do anything cause I've done it before with nothing like this happening. Note to self, keep a good pair of side cutters on hand. Cheers __________________ Adam S.
	.

07-16-2006, 07:02 PM	#2
aceplant00 RCC Supreme Contributor I am: Todd M Join Date: Jun 2005 Location: Ontario Radio of choice: Hitec Aurora 9 # of RCs: 10 Feedback: 25 / 100% Posts: 3,036 Total Props: 7	Fried Electronics Just a thought. You might save yourself some hassle by either 1) Change the connectors to match so they can't be put together backwards 2) Mark your connectors with paint so you know you have them right. 3) Would a switch between the receiver and the pack help or maybe a voltage regulator. Might be to much power from the pack to the receiver.
	.

07-16-2006, 07:54 PM	#4
skypupnut RCC Master Contributor I am: jean c blouin Join Date: Nov 2003 Location: Sherbrooke P. Quebec Radio of choice: hitec polk spektrum # of RCs: 30+ Feedback: 0 / 0% Posts: 1,029 Total Props: 2	some futaba receivers ( could be on some others ) have the signal and positive connector shorted together at the receiver batt connector. so when you plug in a batt. pack reversed. smoke show because of shorted pos and neg batt wires. your batt pack might still be good if you replace wiring harness good luck __________________ MAAC 5057 L Jean. C. Blouin CFI Club Aeromodeliste de l`Estrie Skype jean.blouin
	.

07-16-2006, 08:00 PM	#5
Warbird_ace RCC Expert Contributor I am: Adam S Join Date: Mar 2003 Location: Barrie area, ON Feedback: 5 / 100% Posts: 887 Total Props: 1	Standard 4 cell, 4.8V, 1100mAh flat pack. Skypup, you could be right, I never thought of that. I'll check it out, cause as soon as they touched, it went up. The connections are still solid, but I haven't checked to see if the cells have split yet. I don't think I'll use it though, for fear of failure. Cheers __________________ Adam S.
	.

07-17-2006, 09:11 PM	#9
skypupnut RCC Master Contributor I am: jean c blouin Join Date: Nov 2003 Location: Sherbrooke P. Quebec Radio of choice: hitec polk spektrum # of RCs: 30+ Feedback: 0 / 0% Posts: 1,029 Total Props: 2	no regular receivers like 127df __________________ MAAC 5057 L Jean. C. Blouin CFI Club Aeromodeliste de l`Estrie Skype jean.blouin
	.

07-16-2006, 07:03 PM	#3
volksman RCC Master Contributor I am: robert j Join Date: Dec 2002 Location: vernon bridge, pe Feedback: 6 / 100% Posts: 1,047 Total Props: 16	a sudden surge of current is caused by a dead short or very low resistance. putting the negative side of the pack on signal everyone has done that or are these lipolys .
	.

07-17-2006, 06:34 PM	#7
michel gravelle RCC Supreme Contributor I am: Michel G Join Date: Apr 2006 Location: Saint-Jerome Quebec Canada Feedback: 3 / 100% Posts: 3,316 Total Props: 12	Sometimes this hobby makes you pay attention I know I had it happen a few years ago to me Hope it works out for you Michel ( Mike )
	.

07-18-2006, 05:59 PM	#10
Warbird_ace RCC Expert Contributor I am: Adam S Join Date: Mar 2003 Location: Barrie area, ON Feedback: 5 / 100% Posts: 887 Total Props: 1	Where do you send something like that? I do have a switch, but I got lazy and didn't hook it up Oh well, gotta learn somehow. __________________ Adam S.
	.

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