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relay to reverse a motor?

#1
Was not sure where to post this question so I guess right here. If I am the wrong spot please feel free to move it but,

Ok here is a question for all you electronic geniuses out there. I recently took my HZ Super Cub out on the water and one time it floated into the weeds and I had to out into the water to retrieve it. Was it a big deal? No but I was wondering if it were possible to put a relay or something similar in line between ESC and the motor to a switch that would allow the motor to go in reverse to push the Cub out of the weeds? Just curious if any one has done it or am I as loony tunes as the next guy and should stop drinking so much coffee. :cool: Eager to read any and all responses
Thanks
 

pgerts

Old age member
Mentor
#2
I think that there are boat controllers with reverse ;-)
-- As you are "boating" and not flying in the weeds.
 

Foam Addict

Squirrel member
#3
I'm certain you could do that.
When I still worked on Model Railroads, I used relays quite often for various functions, and they are very versatile.
 

FlyingMonkey

Stuck in Sunny FL
Staff member
Admin
#4
It would probably be as easy to put in a variable pitched prop, and manage that in your throttle mixes, or through a switch.
 

Ak Flyer

Fly the wings off
Mentor
#5
A reversable esc would do it, a variable pitch prop would do it, a pair of relays could do it but you need another channel to make it work so it won't be cheap.
 

earthsciteach

Moderator
Moderator
#6
Here's your solution, Bonez: Get a labrador retriever puppy and train it to retrieve your SC. Name the pup, SWD - Swimming with Disaster. :D
 

tramsgar

Senior Member
#8
I agree with pgerts, a boat or "waterproof" car ESC will do well. I use a fishing rod for my seaplane, although I've had better success with full scale boats or stripping down to get it myself.
 
#16
I'd go for the variable pitch prop myself. Just my opinion here--it would probably be more efficient than reversing a fixed prop. Fixed props tend to make more noise than thrust when reversed.

As for the relay, I gave it a try. I found that (with the various HobbyKing/Turnigy ESCs I have), the motor stops working when I reversed it. I had to dis/re connect the battery to get it to work again.

Now that I think about it, a variable pitch prop is a good idea for my upcoming swappable Dehavilland DHC-2 Beaver. Thanks for the idea FlyingMonkey.

Cheers!
Randall
 
#17
Much love for the green machine. That is just great and probably the best way to do it I have seem yet LOL.

Teach I did try to get my dog to jump out and go get it but she looked at me like I was some crazed lunatic who got their plane stuck in the weeds LOL

After some research it can be done using an ESC from a car and or micro switch between ESC and motor and a servo but seemed like an expensive experiment that may cause motors to burn up etc so I think I will just hold off and maybe look into buying that green machine