twin esc wiring techniques?

[TomcatFLYER]

hi bros,

anyone knows how to wire twin engine set ups (twin motors, twin esc, twin battery)?

is a ubec needed?

how to wire to the reciever?

thanks bro, if got diagram, please share... ahahhahaha

[pilot_bear]

I assume you mean brushless ?

few ways,

esc connection
1. do up a y-connection for your 2 esc to 1ch connectors
a. things to note, remove any one of the red wires from one esc
else you will burn your rx
b. problem you might face, both esc might not initiate together.

2. use a ch as a main and slave another ch.
a. same as above
b. same as above but more flexible as you can set individual ch.

3. use 1 esc to 2 motor.
a. not a 100% thing, sometime both motor turn, sometime not.


batt connection
a. do a y-connection to power both esc with 1 batt
b. use 2 batt.


ubec depends on you, but if you do use one, remove both the
red wire from the esc to rx.


imho a brushed motor for twin setup is simple,
1 esc to 2 motor, serial or parallel, sure both turn.


good luck.

[pilot_bear]

pic

[Super-Hornet]

For me, depend on your applications. If u have intention of running them in separate RPM, then use different channel. (The #2). If u just want then to run in equal RPM, then use Y cable is the easiest.

SH

[TomcatFLYER]

i see, from your comments and pilot bear's pic (both really helpful)... i can wire it properly,

but i'll like to clarify this rumor i heard

1) no esc is the same, if twin esc run on a y-harness, there may be a noticable difference between each motor. IS this true?

[TomcatFLYER]

also, is a ubec really necessary?

[pilot_bear]

i see, from your comments and pilot bear's pic (both really helpful)... i can wire it properly,

but i'll like to clarify this rumor i heard

1) no esc is the same, if twin esc run on a y-harness, there may be a noticable difference between each motor. IS this true?

2) also, is a ubec really necessary?

1. you will be very lucky if both same brand can initial together. but even
that,they will still be slight diff, you will need to do some tuning. the best
option will be to use diff ch and mix the 2 ch together, this will give you
more flexibilities. e.g. trim, curve.

2. depend on your setup, and equipment. its an optional thing.

[TomcatFLYER]

i see...

thanks

oh,

1) lets say if i have 2 escs on 2 seperate batteries, one of which has a red wire to the rx, the other doesn't... will one esc have lesser power than the other in terms of motor output?

2) if cannot initiate together then how?

3) if i put diff channel, tune it, does the memory save on the tx or esc?

4) is there a way to tune both escs to equal thrust if i connect them to a y harness?

sorry ha, a bit confused by this twin esc thing

[pilot_bear]

1) lets say if i have 2 escs on 2 seperate batteries, one of which has a red wire to the rx, the other doesn't... will one esc have lesser power than the other in terms of motor output?

2) if cannot initiate together then how?

3) if i put diff channel, tune it, does the memory save on the tx or esc?

4) is there a way to tune both escs to equal thrust if i connect them to a y harness?

1. the one with the red wire will also need to supply power the rx and servo.
how much i am now sure, never did measure it.

2. use the trim to trim down till both esc initial,
even if both esc initial very small steps, your throttle of both motor will still be different, something like one will start to spin then the other one, at diff rpm too.

3. tx, you actually are playing with the trim (for initiate of esc) and curves (for rpm/throttle)

4. no.

good luck.

[Babylon5]

Hi, I have set up a twin EDF, with two set of ESC and two set of Lipo batteries (3s)connected in parallel via a Y connectors.

One concern I had was a possibility of un-even distribution of discharge current from the twin battery packs.

To solve this problem , I matched the two batteries packs so when they discharge the current from each packs is about the same.

At the moment, I disconnected one of the red wire (5V) from the ESC to the RX but leave the other one intact.

I am thinking of leaving both ESC red wire to the RX. This will to act as redundancies systems both supplying 5v supply to the RX . There will be no electrical contention if the positive 5V regulators of the ESC .... last stage are assumed common base NPN transistor. The transistor will act as a "one way diode during conduction".
I need to try out and experiment if it is possible.

Next motor running not in sync. Motor not in sync is very critical for propeller driven multi motors especially so if the motor are space further apart from each other.

For twin EDF(electric ducted fan) with their EDF place close to each other are less critical. Right now I am flying a twin EDF with the motor slightly out of sync and it still tracks well.



Cheers

[rockinanko]

new to twin engine airplane

oh no, after reading the discussions here...it sems that it's extremely difficult to synchro the 2 engines to work equally!

gee, i thought it's about the same as 1 prop or 1 DF setup...
i wonder if anyone here has a simple & successful setup to share, i'm intending to get a twin prop piper or a twin DF learjet to fly cos' there're just too many planes of the same kind flying around.

now i have my reservations...didn't know it's so complex to do a twin engine RC.

can someone help on this? sad lah...no flying variety!

marc

[rockinanko]

...also, could the thing called ubec or opto be of any help in the stance?

please advise all seniors, junior struggling here to learn.

marc

[jansonfinn]

...also, could the thing called ubec or opto be of any help in the stance?

please advise all seniors, junior struggling here to learn.

marc

This is my twin EDF setup on my A-10
2 X EDF fans + motors connect to 1 ESC each. Two Escs Y-cabled to 1 Channel for the Rx & also at the same time, both deans Y-cabled to 1 X 3S 2200mah.

Now still at the stage of using carbon ply to strength the nacelles area. So plane not yet maiden, not sure if I will face any problems during maidening by using the above setup.

[rockinanko]

This is my twin EDF setup on my A-10
2 X EDF fans + motors connect to 1 ESC each. Two Escs Y-cabled to 1 Channel for the Rx & also at the same time, both deans Y-cabled to 1 X 3S 2200mah.

Now still at the stage of using carbon ply to strength the nacelles area. So plane not yet maiden, not sure if I will face any problems during maidening by using the above setup.

humm...i hope your 3S has enough 'C' to supply the 2 esc for at least a 5min flight. seem like an underpwer setup, have you tried 'dry run' the plane?

oh, to me dry run means holding the tail of the plane & max throttle to feel the thrust...yes it doesn't mean anything in figures though, but you can actually tell yourself if you're feel confident or not to test fly the plane.

well that's how i 'assume' my setup was okay...

[jansonfinn]

humm...i hope your 3S has enough 'C' to supply the 2 esc for at least a 5min flight. seem like an underpwer setup, have you tried 'dry run' the plane?

oh, to me dry run means holding the tail of the plane & max throttle to feel the thrust...yes it doesn't mean anything in figures though, but you can actually tell yourself if you're feel confident or not to test fly the plane.

well that's how i 'assume' my setup was okay...

i haven't max throttle in dry run yet. 1 of my friend was also using 3S for his A-10, but I wasn't sure if he is on 2 ESC or 1 ESC setup.

Anyway I will test flight for a min n then check the temp of the electronics n volt of the batt. Hopefully it can last me for 4 - 5 mins flight