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JP hobby elec brake question

Old 05-31-2022, 12:08 PM
  #26  
Vincent
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Originally Posted by Viper1GJ View Post
I started out with the Xicoy LGC-15 on 2S. Since the JP retracts can only use 2S the brake power is also limited to 2S from the LGC-15. I switched to the AG-63 to allow brakes to use 3S power. For a while it worked excellent. Perfect straight steering and braking. But then the brake outputs on the AG-63 stopped working. The steering still worked. So I went back to the JP brake controller that is now toast. I've been told that the heavier jets need 3S to get the stopping power from the JP brakes. That is why I switched away from the LGC-15.

Vincent, did the SM air brakes fit on the JP gear with out a lot of fuss or machining? Where did you get the SM 1/6 F-16 brakes?
Gary
Nothing major but i had to make up a new 8mm axle and drill / tap both ends for bolts to secure. Also the SM axles were 7mm so i had to replace those wheel bearings with 8mm type. I found a used set of wheels and brakes a few months ago on rc groups and bought them. I figured eventually i would be using them as the JP set would just not cooperate.

Last edited by Vincent; 05-31-2022 at 12:13 PM.
Old 06-01-2022, 04:01 AM
  #27  
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Originally Posted by Vincent View Post
Nothing major but i had to make up a new 8mm axle and drill / tap both ends for bolts to secure. Also the SM axles were 7mm so i had to replace those wheel bearings with 8mm type. I found a used set of wheels and brakes a few months ago on rc groups and bought them. I figured eventually i would be using them as the JP set would just not cooperate.
Sounds like a little bit of work getting and fitting the air brakes. I'll probably try going back to the AG63 and see if it will work better again.
Thanks
Old 06-01-2022, 04:18 AM
  #28  
Vincent
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Originally Posted by Viper1GJ View Post
Sounds like a little bit of work getting and fitting the air brakes. I'll probably try going back to the AG63 and see if it will work better again.
Thanks
Several of my club members have the same JP brakes on their L39's and use the AG63 gyro. They claim the 63 puts out more voltage to the brakes than the stock JP controller and the brakes engage at higher speeds. Its worth a try if you are not able to do the conversion to air.
Old 06-01-2022, 08:31 AM
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Ag63 vs lgc15? Any experience?
Old 06-01-2022, 10:32 AM
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Originally Posted by Ceeray View Post
Ag63 vs lgc15? Any experience?
Depends on your project. I've used both successfully. For smaller to midsize aircraft (up to approx. 35lbs) the AG63 is fine. For larger aircraft ( above 40lbs) the LGC 15 is the way to go. This is mostly for the ability to set (increase) the resistance amperage for the heavier retracts. This will allow the gear to complete full retraction against the weight and wind resistance (including gear doors) after takeoff.
Old 06-01-2022, 12:01 PM
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Originally Posted by HotelSierra View Post
Depends on your project. I've used both successfully. For smaller to midsize aircraft (up to approx. 35lbs) the AG63 is fine. For larger aircraft ( above 40lbs) the LGC 15 is the way to go. This is mostly for the ability to set (increase) the resistance amperage for the heavier retracts. This will allow the gear to complete full retraction against the weight and wind resistance (including gear doors) after takeoff.
Agree with all the above. The problem I had with LGC-15 was there is no way to have different voltages for retracts and brakes. When JP retract motors are limited to 2S and you need 3S for JP brakes you have to use a different brake controller since LGC-15 is limited to just one voltage input.

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