Why do we not use backup airborn packs on jets? A friend of mine in the battery business says i should be using two flight packs and two switches in parallel on the reciever. i am undecided.

All my turbine models have dual packs. I wouldn't go any other way.

TonyF,
OK so then both packs can be run to the reciever in parallel with no device (such as "battery backer") separating them? How about other redundant techniques such as splitting the airplane right/left and running two recievers/flightpacks?

I am curious on the two rx too, or is it not necessary?

I run dual packs in all my planes, no battery backer or diodes.....Just two packs, two switches. Small insurance policy thats well worth the money!
Todd

I also use two packs in parallel and two switches. The only rule is that both packs must have the same number of cells. Different capacity is OK.

I would think two packs and two switches would work ok as the RX will draw an equal amount of current from both but lets assume one of the two battery packs has a cell that shorts what happens? would it discharge the other one?

Has anyone had one of two packs fail ( not just going flat) while using two packs without diodes or regulators? if so what happens?

Is it poserble and would it be a good idea to use 2 regulators like the jaico one BVM sells?

Bob V told me that they use one pack, one switch and use the ultra duo two to look after the packs.

jason