ticedoff8

Until the EC5 connector on the main battery unsolders and you lose the power to the ESC / BEC.
Then you watch the heli fall to the ground in a heap.

That failure scenario would not be the fault of the ESC.

However, something is seriously wrong if your connector gets hot enough to the point the solder joint melts.

OK my question is why use a second battery when the main one is still good just the BEC has gone south not the main battery. Coulden't you just use the main battery wired to the diode around the ESC?

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

No - - because a 3S main battery will put 12V to your RX & servos.

Aaahhhh good point if your using a 3s battery.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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I was thinking using two different type of batteries to do the job. For example, a lipo 2S as a main system and a regular 4s NiCD as a backup system.

I an not quite sure how this diode fail... I think this diode fail doing a short circuit... Very dangerous situation because the two system is being connected with the failed diode.

How this diode fail anyway?

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Saludos cordiales,

Diodes usually fail open.

My diodes are supposed to be in by the 30th I'm going to load them up on the bench and see how it works

Planning on stressing it much as I can
Be using 2 lipo packs

Lets do the time warp againnn !

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Well, I don't trust either on ESC with BEC.

Every electronic component on board is a point for failure, so, be careful.

Keep your stuff simple.. Don't mess with more cheap components on board.

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Saludos cordiales,

I got you man
The only can do the best you can and to be as safe as you can

Lets do the time warp againnn !

Well, I don't trust either on ESC with BEC.
Every electronic component on board is a point for failure, so, be careful.
Keep your stuff simple.. Don't mess with more cheap components on board.

Everything is a point of failure, man made or not.
Eliminating points of failure is not the question, reducing the probability of failure by proper design is the question.

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When we install a 2s2p LIPO battery, we use a redundancy criteria.

This recomendation has the Same criteria... Looking for some redundancy in case of failure. So, no diode is required for such a procedure.
Put the two batteries in paralel and ready To flights .

The Main issue with this concept is that both sectors are draining energy ,so it is not a backup device. Both batteries are working at the Same time. So, by the time you need this, the backup battery would be exhausted.

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Saludos cordiales,