Hi guys!
I have recently switched to Fromeco Relion packs in my SM F-16 1:6, a 5200 MaH pack as the main battery and a
2700 MaH pack as backup. Yesterday, I spoke with one of my jet friends here and he warned me that if pulling a lot
of amps the Fromeco (or any LiIo) packs will drop the volt below Weatronics cutoff values and I would have a lockout.

I have heard that this can happen with big 3D prop models with a lot of servos, I fly the F-16 with 3 servos only, and
I fly the FB Panther with the same packs and 5 servos - ailerons, elevators and rudder. Does anyone have any
experience with the Fromeco batteries/Weatronic or any other receiver and a battery management system?

Thanks,
Tor

You do not need any regulators with a weatronic DR, it has 4 built in regulators. Set the DR for on the Set up page lipo and off you go !

You will be able to analyse current draw on the Nav view page.

Regards, David Gladwin.

I think what Tor means is that the Fromeco can get too low in voltage during "heavy" load so that the Weatronic sees this as a low-voltage situation (which is also is...) thereby resetting ?
With the high current draw, it is very important to keep the wires from the battery to the receiver "short and thick" otherwise you will get a high voltage drop, which the receiver will see (correctly) as a "low battery" condition.

I have just (almost) completed a large prop plane with 18 servos in (comp-arf pitts s12), I have two Weatronic receivers already in use in other planes, but for this power-hungry bird I choose to use a PowerBox Royal, as that can supply 40 amps to the servos, the Weatronic is 20 Amps (if I remember correctly..)
The peak current under no load for 2 x 8911 servos for one part of the elevator is up to 13 amps!

One of my Weatronics is in a comp-arf Extra 2.6m, driving 8 x 8711 servos, no problems so far, so I think you will be happy with the 3 and 5 servos

On a F-16 jet with small movements on the flying surfaces I think you should be safe, although flaps/breaks down and a lot of speed will draw some current. I do know that a freind of mine (in my club) lost his 3.3 meter Yak with the exact same setup. He was drawing around 20 amp at that time in silly tight diving snap rolls. He used the Hitech 59xx titan gear servos.

I do know he switched to lithium manganese after that and it was ok (although on another planes as the first one was destroyed). As I said, I do not think you will get that high. Check your current and check how high you are. For your backup to be safe you should be above 2C sustained for more than 1 sec for your setup to be fully redundant as your backup is much weaker than your main battery.

Regards
Oistein