How many amps will all the electrics draw?

[BenScoobert]

How much are you drawing with a typical setup like this?

AR7200BX
3x DS620
1x DS650

The reason I'm asking is sizing BEC or LiFe to help me decide how to set a machine up. Don't want to overload a BEC or kill a LiFe.

[JoeBailey]

5-10A continuous with spikes up to 15-20A for any type of flying.

Joe

[johnsandywhite]

Life will be no problem. I amusing them with Align servos all round on Trex 550E, Trex 600E, Logo 600 3D and Goblin 700.

[BenScoobert]

5-10A continuous with spikes up to 15-20A for any type of flying.

Joe

Based on what? I looked for specs but nothing about amp draw

Life will be no problem. I amusing them with Align servos all round on Trex 550E, Trex 600E, Logo 600 3D and Goblin 700.

Wondered whether to run both, just in case.

[Gixxer]

8 Amp + BEC... based on I have an 8 Amp BEC powering a similar setup on one of my 700s. I calculated its needs when I built it, then allowed a bit of headroom and I wouldn't like to go any lower

[JoeBailey]

Anything less causes Helicopter ground interface.

Western robotics rating, kontronic bec rating, castle bec rating, fromeco bec ratings. Etc. All the high end equipment has those specs as a minimum.

The align servos are very power hungry and will draw big spikes when flying, plus fbl helis use lots more current due to the servos doing both flight and stabilisation duties.

[BenScoobert]

Does anyone else run BEC and Lipo/life just in case?
I know 1 forum member wishes he had the other week. He does now. Hi SB

[cjcj1949]

It's not easy. I would measure it. Digital servos do take a lot when working hard so the average consumption will depend on the way you fly and the tightness of the linkages. You also have to decide what to do if the servo can't reach the demanded position. The current demand can be large enough to break the servo. MKS advise using separate current limiters for each servo. Some servos take less current when stalled.

[chris jones2.4]

im using all align servos, Vbar and a switchglo off of a Align 2in1 no probs rated at 6a continous

[BenScoobert]

If you use a Life and BEC with less voltage then the LiFe.
Am I right in thinking the BEC will be "on demand" so only if the battery voltage drops below the supplied BEC votage, battery failure, or during high power demands as voltage troughs?

[coolice]

im using all align servos, Vbar and a switchglo off of a Align 2in1 no probs rated at 6a continous

Hey Chris.

Then you're being lucky so far buddy, as over on HF some have been able to invoke brownouts on the bench by cycling the servos with no load while using Align 2in1's. Being honest there are some which get away with using a low rated BEC without issue, but its marginal at 6 amps so risky.

Each servo is capable of drawing 2+ amps and we have 4~5 depending on model, plus 3 gyros on an FBL setup all moving the servos as well as your piloted commands and flight loads placed on the servos which is now more direct with no mechanical advantage again depending on model.
Even for 600 class FBL machines I always advise a good regulator (or LiFe) capable of 8 amps+ to safe guard the model.
.

[coolice]

If you use a Life and BEC with less voltage then the LiFe.
Am I right in thinking the BEC will be "on demand" so only if the battery voltage drops below the supplied BEC votage, battery failure, or during high power demands as voltage troughs?

Hey buddy.

Unless you are using a Kontronik and going to fit a buffer pack, I think in order to run a desperate BEC and a LiFe redundancy pack you'd need some form of electronics linking it all together. Reason being the BEC might not take to kindly to being fed voltage from another source, I've read of problems where fliers have forgot to opto-isolate the ESC's BEC power supply by removing the red wire from the Rx plug and have fired components due to their being two sources of power supply into the radio system.

To save added wiring and another thing to go wrong I'd stick to either a good LiFe pack or a regulator and LiPo setup.
.

[Si Goodchild]

I was running a 5A BEC on the ground with my FBL 550 and the sat rxs started flashing as soon as I waggled the stick - needless to say I got rid of that BEC quickly! I now use LiFe packs and all is well.

[BenScoobert]

Hey buddy.

Unless you are using a Kontronik and going to fit a buffer pack, I think in order to run a desperate BEC and a LiFe redundancy pack you'd need some form of electronics linking it all together. Reason being the BEC might not take to kindly to being fed voltage from another source, I've read of problems where fliers have forgot to opto-isolate the ESC's BEC power supply by removing the red wire from the Rx plug and have fired components due to their being two sources of power supply into the radio system.

To save added wiring and another thing to go wrong I'd stick to either a good LiFe pack or a regulator and LiPo setup.
.

This BEC has 5,5V, 3A continous. 5A Peak. So I think it may just be best unplugged and tucked away then. I have run it before with a flybarred machine and a LiFe, no issues, but not drawing power like this fbl setup will.

[BenScoobert]

This BEC has 5,5V, 3A continous. 5A Peak. So I think it may just be best unplugged and tucked away then. I have run it before with a flybarred machine and a LiFe, no issues, but not drawing power like this fbl setup will.

Epiphany....How the feck could I do that? Maybe I need to be a guinea pig...