Twin motors and esc's

[wrk134]

Just a couple of a long list of problems I need help with.

I would like to individually control both motors in the 1:72 Rotterdam I'm working on. One motor at stop or reverse and the other forward. Do I need separate channels of my radio to do this.

I've read about problems with proportion control an esc, if each needs a sperate channel I dont think of it being a problem. Any help?

[Ghost 2501]

try here http://www.rcgroups.com/forums/showthread.php?t=783582

[cyclops2]

Setup the 2 channels as a ELEVON. Use a stick with 2 full channels. Do not use the throttle stick at all.
Same as a flying wing. Instead of 2 servos, you plug in the 2 ESC's.
Logicaly it will work.

Rich

[lgr333]

I'm kind of new at all this, but just today I took put together a twin prop boat and ran it in the pond individually controling each motor. The boat has no rudder and steerage is control with individual control of forward and reverse of each prop. The set up I used was the starboard shaft and motor to a stbd ESC to channel 1 of the rcvr. I ran the port shaft and motor on another ESC to channel 2 of the rcvr. I just threw it together to test it out. I played for over an hour. What a blast my only problem was my radio is pistol style and I need at least two stick.

[lgr333]

One point that could be important with twin esc and twin motors is that the esc are the same kind and both motors are the same kind

[Ghost 2501]

in Scale Boats there is a sticky with wiring diagrams, :) dead simple to follow and its right at the top of the pile :)

[Ghost 2501]

Setup the 2 channels as a ELEVON. Use a stick with 2 full channels. Do not use the throttle stick at all.
Same as a flying wing. Instead of 2 servos, you plug in the 2 ESC's.
Logicaly it will work.

Rich

and Ive done EXACTLY THAT IN my Yamato, with ch3 ("throttle") controlling the guns not a speed controller, CH4 is rudder, just as in aircraft, 1&2 work the motors, with the left/right axis of the right hand stick P-mixed to rudder as well, so when full throttle mixing is applied, the rudder also functions as well, allowing me to use both throttle AND rudder in turns. she, unlike the real thing, turns on a dime!

[cyclops2]

Could you draw out a simple straight line diagram so people know how things plug in.

Rich

[Ghost 2501]

try here http://www.rcgroups.com/forums/showthread.php?t=783582

that thread has all the diagrams :)

[Prins Willem]

A few of the guys in our club went with a fairly easy method of stopping the inboard prop. Put a "Cherry" snap switch on each side of the rudder or servo arm. Wire each one into a motor circuit. The switch should be wired "normally closed". When the rudder is fully over it opens the switch stopping the opposite propeller. You can substitute momentary push button switches. One of our guys uses this method to sound the horn on his freighter. Throw the rudder hard over and the horn sounds. Come off the rudder and it stops. A way to get additional function from a 2 channel radio.

I'm lazy so I just use a four channel system with 2 esc's. FYI, "Cherry" is a brand name for a snap switch. Any brand will do. I believe Radio Shack sells this type of switch. If you want to know how these switches work go to the Cherry K series page at:
http://www.cherrycorp.com/english/switches/miniature/k.htm

[ropanach]

Thank you Goast for your diograms, I have printed all of them of for the club because this question comes up alot from time to time between our members, at our age a picture is worth a 1000 words. thanks

[Ghost 2501]

Thank you Goast for your diograms, I have printed all of them of for the club because this question comes up alot from time to time between our members, at our age a picture is worth a 1000 words. thanks


Ron, thats what they're there for and even if someone copies them and pastes them onto another site, which inevitably will probably happen I wont sue for copyright, as I want them diagrams to be used, and to describe things is much harder than to look at a sketch or diagram :) even at my young age, a pic is worth 1000 words :)

[wrk134]

what great info. Thank everyone