Reverse ?
01-21-2016, 06:37 PM
#1
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Reverse ?
Hey Friends,
I have a Question????
Last year I built an FPV/Autopilot 32"X16" Catamaran/Airboat with twin brushless motors with 8" props with differential steering. It worked great except that it didn't turn sharp enough. So this year I am going to build another Cat with a single brushless motor with a 10" prop and typical Airboat rudders.
I am thinking about reversing the direction of the prop to to see if I can get enough power to back up a little.
What do you think?
The only way I can think of to do this is to swap a couple of the motor wires. Do you know if there is a switch I can control from my transmitter that will do this?
Thanks
Jerry
EDIT: I think I found the answer.
Use an ESC that has reverse capability.
The elevator controls the throttle up/foreward and down/reverse.
The ailerons are the boats air rudders. Being spring loaded to center when you let off the stick the motor stops.
I have a Question????
Last year I built an FPV/Autopilot 32"X16" Catamaran/Airboat with twin brushless motors with 8" props with differential steering. It worked great except that it didn't turn sharp enough. So this year I am going to build another Cat with a single brushless motor with a 10" prop and typical Airboat rudders.
I am thinking about reversing the direction of the prop to to see if I can get enough power to back up a little.
What do you think?
The only way I can think of to do this is to swap a couple of the motor wires. Do you know if there is a switch I can control from my transmitter that will do this?
Thanks
Jerry
EDIT: I think I found the answer.
Use an ESC that has reverse capability.
The elevator controls the throttle up/foreward and down/reverse.
The ailerons are the boats air rudders. Being spring loaded to center when you let off the stick the motor stops.
Last edited by Jerry Campbell; 01-21-2016 at 07:19 PM.
01-22-2016, 12:17 PM
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The more I think about it, the less I like the idea of not being able to set the throttle and let it cruise.
Does anyone know of another way to reverse the prop?
Jerry
Does anyone know of another way to reverse the prop?
Jerry
01-22-2016, 08:14 PM
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01-27-2016, 05:06 AM
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Thank you
Jerry
01-27-2016, 06:55 AM
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01-27-2016, 07:42 AM
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Yes you likely will want a car transmitter. Most aircraft transmitters will allow reverse, but not on the throttle stick. It can be done with an aircraft radio, but a car radio is much easier IMO. You could use a simple FM radio which would be fairly cheap since many guys are using or switching to 2.4GHz. An AM radio would work too in a pinch.
01-29-2016, 02:44 PM
#14
I'm not sure how a car speed controller would react to the throttle signal from an "aircraft" radio, but I'm sure you can "play" with the throttle curve in the programming until the car speed controller can interpret a reverse command by the radio. It should work almost like the trigger on car radio.
Rafael
Rafael
01-30-2016, 02:18 AM
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Any speed control or servo just responds to the signal it gets from the receiver. What the receiver puts out to the ESC/servo depends on the transmitter stick position. Many modern car/boat/truck ESCs need to see a valid neutral at start-up. For planes, this is generally "stick full back". For boats, it is generally "stick central".
If the transmitter stick does not self center, it is a PITA trying to use it where a center point is needed. If its a 4 stick set, often the right stick self centers. Use that use that for the throttle. If using differential steering, use a mixer between the RX and ESCs. Brushless ESCs that do not need to go through a double flick sequence via "braking" to get to reverse are coming on the market. Those that do need that can not be used with mixers.
If the transmitter stick does not self center, it is a PITA trying to use it where a center point is needed. If its a 4 stick set, often the right stick self centers. Use that use that for the throttle. If using differential steering, use a mixer between the RX and ESCs. Brushless ESCs that do not need to go through a double flick sequence via "braking" to get to reverse are coming on the market. Those that do need that can not be used with mixers.
