andy_downs
been flying electric a few years but not come across these esc,s,who fancies being 1st to put them in a foamie jet.
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Grantman
I can see the need on a seaplane, but not sure I understand this. Leave out the battery velcro for the same effect
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Wildthing
I bought a reversing servo from BangGood, 40A I believe, it was for a seaplane but don't remember what. It worked for awhile and then crapped out , never did order another.
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bogusbandit56
Could try this.
Wot, no Depron?
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Grantman
See that I understand, dude is actually using it to do something.
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Wildthing
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Could try this.

That's amazing. How the heck does he keep perspective of it. Where the heck does he have the motors mounted on it, never flies slow enough to see? I am gathering it is midmount.

The reversing esc I had wouldn't reverse that fast, you had to wait for the motor to stop spinning.
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Grantman
Stop the vid at 7 second mark and you can see the motor/propslot right at the cg.

Also, any esc compatible with SimonK can be made to do this.
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bogusbandit56
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That's amazing. How the heck does he keep perspective of it. Where the heck does he have the motors mounted on it, never flies slow enough to see? I am gathering it is midmount.

The reversing esc I had wouldn't reverse that fast, you had to wait for the motor to stop spinning.

It is a reversing prop the motor has a a hollow shaft and a swash plate like a helicopter.
It is the prop that is being mechanically reversed, I don`t think an esc could do it that quickly but I am no expert on 4D in fact the only thing I know is that it IS truly amazing.
Would imagine that a reversing ESC could be used to slow down model planes instead of flaps and would be useful on air boats.
Wot, no Depron?
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Wildthing
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It is a reversing prop the motor has a a hollow shaft and a swash plate like a helicopter.
It is the prop that is being mechanically reversed, I don`t think an esc could do it that quickly but I am no expert on 4D in fact the only thing I know is that it IS truly amazing.
Would imagine that a reversing ESC could be used to slow down model planes instead of flaps and would be useful on air boats.

Found the piece, not instock but I don't have those skills anyways.

https://hobbyking.com/en_us/4d-hollow-variable-pitch-unit-without-motor-3mm-motor-shaft.html?___store=en_us
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whatmovesyou
bb56 is right about the motor having a hollow shaft where the servo to change the prop from positive to negative angle sat behind the motor and the wire went thru the motor hooked to the blades. No reversing the esc. Use graphite to reduce resistance of motor.

You set the radio up in heli mode so RPM"S are fixed and center throttle is 0 degrees prop. If you advance the throttle, prop goes positive and if throttle is less than half, prop reverses. If you fly helis and can hover inverted, it is the same thing.

Why 4D is not popular is that the stresses the prop and rig take were made out of plastic!!!! I went thru 3 different companies and each blew apart from stress. Prop design is critical(to have positive thrust both ways) and cheap plastic doesn't do it. Bet those guys change parts often. Now made from metal and adds terrific weight to model. That hinders it.

For those who have RealFlight6(others ?) look for FlatOut Extra with V (variable) Pitch. Have a go at it. Gives you the chance to see how good you are.
I like to design and fly unique planes.
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andy_downs
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Could try this.

could try it but I wont as I like my planes in one piece.
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Eldorado4
Now That’s Flight Control !


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Wildthing
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could try it but I wont as I like my planes in one piece.

I am sure my first reverse would mean death.
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Eldorado4
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I am sure my first reverse would mean death.

I second that !


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whatmovesyou
Hey, it's only 3d hovering in reverse. One additional point to make is that in order to hover regular or upside down or whatever, you need propeller AIRFLOW and a control surface to accomplish it. That includes all three axis. Notice that ailerons move almost 150-180 degrees on different designs!!!!!
I like to design and fly unique planes.
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