ORIGINAL: Tom Antlfinger
ORIGINAL: David Gladwin
and all that power going through the tiny busses in the receiver.
I was informed several years ago by a JR tech at Horizon that the 900 series RX bus and gold plated pins are designed for a nominal 30 amps with a generous spike safety margin as well...that 180+ watts of dissipation with a 5-cell pack!!!.......not to fret here......copper ribbon has enormous current capabilities at low voltages......upon inspection, I have never seen any sign of deterioration of that part of my RX's in the last 40 yrs......it's getting it out to the servos where the worry for me begins.....In one of my Ham Radio amplifiers, the buss carrying 48 v at 50 amps continous is paper thin and about 5-6mm in width.....you'd be surprised how teenie some of the sub-buss foil wiring was on that behemoth 747 you used to command...
Tom
David and Tom
Please also take to account the dimension of a standard servo/battery connector that is plugged in to the receiver.
This is a weak link. It can not possibly be designed for on a single basis supplying the power for a full set of digital servos etc.
Just compare with any connectors designed for modern electric flight. The standard servo connector is designed to to take a few Amps no more. It wouldn't surprice me if the current drop over that connector affects the servo torque significantly if you have a set up of 4 digital servos and supply the power over a single slot in the receiver.
Cheers/Johan