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Carbon T-28

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Old 11-27-2016, 09:19 AM
  #151
Steve Collins
 
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Just plug the wires in. If the motor runs backward, disconnect and swap any two of the wires.
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Old 09-11-2017, 04:35 AM
  #152
Chloe
 
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Default AS3X not responding for new Carbon-Z T-28

Purchased a new T-28 from my LHS last weekend. I put it together with no problems in about 1hr. I followed the Binding procedures in the manual. I am using a Spektrum 9 Channel, Black Edition.

I have everything working except, no response from the AS3X when I test the surface area's as indicated to do in the manual. If I tip the plane side to side for Roll, Pitch or Yaw, I can hear the servos hi pitched sounds, but the Ailerons, Elevator and Rudder do no move at all to counter react.

I have the iPhone APP and the program cord.

It shows all three flight modes set by the factory to 100% / 0% / 195% for Roll, Pitch and Yaw.

My guess is either something is not set right, or the Gyros in the AS3X are not working.

Also, can someone tell me what their settings are in their AS3X AR636a that came in their T-28?
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Old 09-11-2017, 03:54 PM
  #153
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Quote:
Originally Posted by Chloe View Post
Purchased a new T-28 from my LHS last weekend. I put it together with no problems in about 1hr. I followed the Binding procedures in the manual. I am using a Spektrum 9 Channel, Black Edition.

I have everything working except, no response from the AS3X when I test the surface area's as indicated to do in the manual. If I tip the plane side to side for Roll, Pitch or Yaw, I can hear the servos hi pitched sounds, but the Ailerons, Elevator and Rudder do no move at all to counter react.

I have the iPhone APP and the program cord.

It shows all three flight modes set by the factory to 100% / 0% / 195% for Roll, Pitch and Yaw.

My guess is either something is not set right, or the Gyros in the AS3X are not working.

Also, can someone tell me what their settings are in their AS3X AR636a that came in their T-28?
You have to raise the throttle above 25% before AS3X is enabled.
Remove the prop (it should always be removed when testing or working on the plane), raise and then lower the throttle and then pick it up and test the AS3X.
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Old 09-18-2017, 12:02 PM
  #154
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Is there a better way to mount the main landing gear in the wing besides those flimsy plastic pockets? They are easily broken and are not sold separately.
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Old 09-25-2017, 03:46 PM
  #155
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Default Retract Options

Are there any aftermarket retracts available for the Z T-28 ?
The wing unit died after only 33 flights . If not, are there any modifications to the stock units to render them more dependable? To my suprise Horizion didnt offer much information or incentives to get me back in the air. But they did offer to mail me a new one for 39.99 plus shipping.
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Old 10-25-2017, 06:31 PM
  #156
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Viper, I couldn't agree with you more. I'm on my third servo for nosegay. That sliding block is a joke and just a matter of time before servo burns out. Fortunaytely I have always been able to land the plane. just no control once on runway since servo burns out in flight. I may try the sleeve technique.

Thanks
Marc
PS,,, I too mostly fly jets but just wanted this for a nice change of pace. Does fly excellent.
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Old 10-25-2017, 06:32 PM
  #157
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Viper, I couldn't agree with you more. I'm on my third servo for nosegay. That sliding block is a joke and just a matter of time before servo burns out. Fortunaytely I have always been able to land the plane. just no control once on runway since servo burns out in flight. I may try the sleeve technique.

Thanks
Marc
PS,,, I too mostly fly jets but just wanted this for a nice change of pace. Does fly excellent.
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Old 10-25-2017, 07:38 PM
  #158
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Marc, yes the sliding block is a joke. Go to post #122 to see what I did to stop the slider cocking during the arc while retracting. The brass has worked great since then with only a very small occasional dab of Vaseline.
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Old 10-26-2017, 11:42 AM
  #159
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How can you do that when the rudder and steering servo are "y"'d into same channel.. And there are no extra channels on stock RX
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Old 10-26-2017, 12:41 PM
  #160
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When the gear are retracted the brass slides back and forth during rudder operation. When the gear are extended the brass slides until the arm is perpendicular for nose wheel steering. Everything is stock mechanically except I stopped the cocking with the brass tubing and I changed the steering servo to a better servo. This won't prevent the retract from burning out on its own. I disabled the BEC and run a separate 4.8V NiMH battery to keep the voltage down and extend the life of the retracts.
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Old 10-27-2017, 06:45 AM
  #161
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I don't know if anyone else has but I sent a note to Horizon about the issue wit a picture of my( and yours , and many others I'm sure) solution

http://www.rcuniverse.com/forum/atta...1&d=1509115523
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Old 11-01-2017, 07:35 AM
  #162
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Default Steering block sticking.

Hey guys
I took my t28 apart after 38 flights to look the nose gear over. I never had the sticky steering block issue to the point it ruined the servo but it didn't operate very smoothly. The problem is the rough lathe turned surface of the rod the block slides on. I'm a professional machinist so it's easy to feel with your finger nail. I sanded mine smooth and with a touch of grease it slides smoothly now while maintaining the engineered tolerances between the block and steering rod.

I was more surprised how the retract circuit board wiring is getting crushed by the weight of the plane and landing forces. There is no air space between the wires and the floor of the nose retract mount. The wires were pounded flat and this is probably the source of many failing retract. I made a pair of spacers to fit between the mount and the retract flange to prevent further crushing of the delicate wiring. Same issue with the main gear but the wires are up aginst foam instead of hard plastic.I carefully removed some foam where the wire impressions were.
I am designing and machining some items to install a much needed oleo strut on the nose gear, and will do the same for the mains when time allows.
After some testing the oleo struts may be available if any T28 owners are interested. Hope this info helps. Thanks

Last edited by BULLITTGT; 11-01-2017 at 08:01 AM.
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