Parkzone North American T-28 Trojan
11-12-2007, 11:32 PM
#301
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RE: Parkzone North American T-28 Trojan
I swapped it out for the included spare...same result. I'll try the APC I have on the Super Cub.
Edit... Tried the APC with the same result. However, it looks like the vibration sounded a lot worse than it was because of some slop in the nose gear. I still think that the motor isn't running totally true though.
Edit... Tried the APC with the same result. However, it looks like the vibration sounded a lot worse than it was because of some slop in the nose gear. I still think that the motor isn't running totally true though.
11-13-2007, 12:30 AM
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RE: Parkzone North American T-28 Trojan
The prop adapter is the problem. The motor shaft is "very slightly" smaller than the diameter of the hole in the prop adapter. At about half throttle you can see the prop hub vibrating and the front of the plane wiggles. If you hold the front of the plane solid (or better yet remove the cowl and hold the motor steady) you should be able to wiggle the prop adapter on the shaft. A new adapter that is the right size should solve it. I have ignored it so far because holding the plane and running the motor isn't the same as the forces generated during flight. I may be sorry in the long run if it turns out to be the cause of Bigtone's problems with the motor.
11-13-2007, 12:35 AM
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RE: Parkzone North American T-28 Trojan
ORIGINAL: S3etigoHide
Does anyone else have a T-28 that starts to vibrate at about half throttle? It seams to die down at higher throttle levels. I think that my motor shaft might have come bent. [
]
Thanks
Does anyone else have a T-28 that starts to vibrate at about half throttle? It seams to die down at higher throttle levels. I think that my motor shaft might have come bent. [
]Thanks
Prop out of balance ?
11-13-2007, 01:01 AM
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RE: Parkzone North American T-28 Trojan
When I first got my T-28 I had the same problem. The prop adapter was installed the wrong way from the factory. I then noticed the adapter allen lock bolt was on the round part of the shaft and not on the flat side. This can also could be caused by them not tightening it down enough. This caused the vibration for me, I installed it the right way and it was gone.
11-13-2007, 09:22 AM
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RE: Parkzone North American T-28 Trojan
Bigtone, I would not show your video of the smoking motor to PZ if you are looking for a free replacement. I fried a large brusless motor (Fiegao 540C-8XL) on my 1/8 buggy conversion project because I ran it without any load. As per Castle Creation, they recommended removing the pinion gear to set-up/program the MambaMax ESC but running the motor without any load on made the motor smoke and short. I had to replace a brand new, never ran motor because of this. Lesson learned the hard way...
I am not certain why, but you should never run an electric motor, specially high rev brushless at full throttle, without any load on them. I understand having the prop on and holding the motor in your hand can also be dangerous...
Just my 2 cents.
I am not certain why, but you should never run an electric motor, specially high rev brushless at full throttle, without any load on them. I understand having the prop on and holding the motor in your hand can also be dangerous...
Just my 2 cents.
11-13-2007, 10:02 AM
#306
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RE: Parkzone North American T-28 Trojan
ORIGINAL: BeavenX5
I am not certain why, but you should never run an electric motor, specially high rev brushless at full throttle, without any load on them. I understand having the prop on and holding the motor in your hand can also be dangerous...
Just my 2 cents.
I am not certain why, but you should never run an electric motor, specially high rev brushless at full throttle, without any load on them. I understand having the prop on and holding the motor in your hand can also be dangerous...
Just my 2 cents.
ORIGINAL: BigTone
I then came in for a landing without thinking anything was wrong. I took the plane out yesturday and whille doing the precheck all controlls worked but, the throttle wasn't there. I then took the canopy off and checked the plugs and battery and all seemed well. I tried throttle again and a cracking sound came from the front of the plane. I then smelt smoke and quickly unplugged the battery. I came home and and turned on the video camera and took the plane's motor and ESC out.
I then came in for a landing without thinking anything was wrong. I took the plane out yesturday and whille doing the precheck all controlls worked but, the throttle wasn't there. I then took the canopy off and checked the plugs and battery and all seemed well. I tried throttle again and a cracking sound came from the front of the plane. I then smelt smoke and quickly unplugged the battery. I came home and and turned on the video camera and took the plane's motor and ESC out.
11-13-2007, 11:26 AM
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RE: Parkzone North American T-28 Trojan
I understand that something was wrong before you ran your test. I just wanted you to avoid getting your warranty refused for the wrong reason by showing them what you did after the appearance of the problem.
Personnally I was told my motor was damaged because of what I did (ran the motor without load) and this is why it is not covered under warranty.
Personnally I was told my motor was damaged because of what I did (ran the motor without load) and this is why it is not covered under warranty.
11-13-2007, 09:07 PM
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RE: Parkzone North American T-28 Trojan
hi guys my name is jay and i just got my t28 trojan i am new in this thread i alway been a stryker fan but when i saw the t28 that was it i had to get it
my question i got the rtf because it came with the battery and charger one of my lhs was relocating and he made me an offer if i buy the last plane he would throw an extra battery for free
now after reading all 13 pages should i go ahead and get rid of the original rx & transmitter and use my own or keep it stock. Reason i ask is because i read that some people where having problems with theres i have not maiden mine yet I rather get your opinion
this the is the rx that i have its a jr- r700
and the tx is a xf421ex also jr can i use these electronics instead
my question i got the rtf because it came with the battery and charger one of my lhs was relocating and he made me an offer if i buy the last plane he would throw an extra battery for free
now after reading all 13 pages should i go ahead and get rid of the original rx & transmitter and use my own or keep it stock. Reason i ask is because i read that some people where having problems with theres i have not maiden mine yet I rather get your opinion
this the is the rx that i have its a jr- r700
and the tx is a xf421ex also jr can i use these electronics instead
11-13-2007, 09:33 PM
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RE: Parkzone North American T-28 Trojan
When I first got my T-28 I had the same problem. The prop adapter was installed the wrong way from the factory. I then noticed the adapter allen lock bolt was on the round part of the shaft and not on the flat side. This can also could be caused by them not tightening it down enough. This caused the vibration for me, I installed it the right way and it was gone.
Thanks!
11-13-2007, 10:59 PM
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RE: Parkzone North American T-28 Trojan
ORIGINAL: S3etigoHide
That seams to be where the issue was. The set screw was on the flat spot, but reassembling the unit greatly reduced the shakes.
Thanks!
When I first got my T-28 I had the same problem. The prop adapter was installed the wrong way from the factory. I then noticed the adapter allen lock bolt was on the round part of the shaft and not on the flat side. This can also could be caused by them not tightening it down enough. This caused the vibration for me, I installed it the right way and it was gone.
Thanks!
Morale of the story....everyone should check their set screw. [8D]
11-14-2007, 10:03 AM
#313
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RE: Parkzone North American T-28 Trojan
Ok, got a new one for you all. I have a small 12 battery charger that I use for car batteries and the motorcycle battery for my RC Glow starter. I hooked the stock lipo charger that came with my T-28 up to the charger to charge the T-28 1800 stock pack. Positive to the nose button and negative to the side contact. It all starts to function when I turn on the 12 charger but after the 3 beeps for the 3 cell lipo the red and green lights flash, red one then green one etc. Then, the lipo charger beeps 10 times and the leds continue to blink one then the other. The lipo does not charge in this configuration but if I just plug the lipo charger into my car cigarette ligher socket everything is great. Any ideas on this?
Now addressing the Rx issues.. I pulled on the connectors that are pluged into the rx from the servos and the whole circuit board inside the case slides around while the case is still anchored solid.
Now addressing the Rx issues.. I pulled on the connectors that are pluged into the rx from the servos and the whole circuit board inside the case slides around while the case is still anchored solid.
11-14-2007, 10:25 AM
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RE: Parkzone North American T-28 Trojan
Ok I nosed in the trojan due to radio failure. I managed to fix most of it, But, I can't seem to find anyone who knows about the motor so I can get a replacement shaft. any ideas?
Joe
Joe
11-14-2007, 10:39 AM
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RE: Parkzone North American T-28 Trojan
ORIGINAL: skylane42
Ok, got a new one for you all. I have a small 12 battery charger that I use for car batteries and the motorcycle battery for my RC Glow starter. I hooked the stock lipo charger that came with my T-28 up to the charger to charge the T-28 1800 stock pack. Positive to the nose button and negative to the side contact. It all starts to function when I turn on the 12 charger but after the 3 beeps for the 3 cell lipo the red and green lights flash, red one then green one etc. Then, the lipo charger beeps 10 times and the leds continue to blink one then the other. The lipo does not charge in this configuration but if I just plug the lipo charger into my car cigarette ligher socket everything is great. Any ideas on this?
Now addressing the Rx issues.. I pulled on the connectors that are pluged into the rx from the servos and the whole circuit board inside the case slides around while the case is still anchored solid.
Ok, got a new one for you all. I have a small 12 battery charger that I use for car batteries and the motorcycle battery for my RC Glow starter. I hooked the stock lipo charger that came with my T-28 up to the charger to charge the T-28 1800 stock pack. Positive to the nose button and negative to the side contact. It all starts to function when I turn on the 12 charger but after the 3 beeps for the 3 cell lipo the red and green lights flash, red one then green one etc. Then, the lipo charger beeps 10 times and the leds continue to blink one then the other. The lipo does not charge in this configuration but if I just plug the lipo charger into my car cigarette ligher socket everything is great. Any ideas on this?
Now addressing the Rx issues.. I pulled on the connectors that are pluged into the rx from the servos and the whole circuit board inside the case slides around while the case is still anchored solid.
11-14-2007, 10:49 AM
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RE: Parkzone North American T-28 Trojan
ORIGINAL: jkcac
Ok I nosed in the trojan due to radio failure. I managed to fix most of it, But, I can't seem to find anyone who knows about the motor so I can get a replacement shaft. any ideas?
Joe
Ok I nosed in the trojan due to radio failure. I managed to fix most of it, But, I can't seem to find anyone who knows about the motor so I can get a replacement shaft. any ideas?
Joe
[link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM1501]Park 480 Shaft [/link] and [link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM1401]Park 450 Shaft [/link]
11-14-2007, 12:13 PM
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RE: Parkzone North American T-28 Trojan
Here is an update. I am having the following problems with my T-28.
1. On the stock radio and receiver I get no glitches on the ground, but once in the air (50-100 feet away) I am getting glitches with all my servos. (I tried my AMA field, and 2 other locations)
2. I put my futaba radio and receiver in, and now the motor fires up off an on ever few seconds and the servos glitch erratically with no input.
3. If I have no serves plugged in other than the throttle I have no problems. Once I plug in the rudder and elevator they start to glitch and the engine miss fires.
4. I don't have that problem with the stock radio and receiver system, but I have glitches in the air.
5. Both the rudder and elevator servos are digital.
6. I have tried replacing the rudder servo and using my futaba system and still get the glitches when the servo is plugged in.
I have contacted Horizon and they weren't sure what was causing my problems, esc, servos, receiver (but it didn't work with my futaba setup). They told me to ship it back, but at a cost of 40.00 to ship it, I am hoping that someone on this board has had a similar problem and was able to find a solution. If it's just servos it would cost $20.00 to fix and save me 20.00 in shipping costs.
Thanks for your time,
Kassun
1. On the stock radio and receiver I get no glitches on the ground, but once in the air (50-100 feet away) I am getting glitches with all my servos. (I tried my AMA field, and 2 other locations)
2. I put my futaba radio and receiver in, and now the motor fires up off an on ever few seconds and the servos glitch erratically with no input.
3. If I have no serves plugged in other than the throttle I have no problems. Once I plug in the rudder and elevator they start to glitch and the engine miss fires.
4. I don't have that problem with the stock radio and receiver system, but I have glitches in the air.
5. Both the rudder and elevator servos are digital.
6. I have tried replacing the rudder servo and using my futaba system and still get the glitches when the servo is plugged in.
I have contacted Horizon and they weren't sure what was causing my problems, esc, servos, receiver (but it didn't work with my futaba setup). They told me to ship it back, but at a cost of 40.00 to ship it, I am hoping that someone on this board has had a similar problem and was able to find a solution. If it's just servos it would cost $20.00 to fix and save me 20.00 in shipping costs.
Thanks for your time,
Kassun
11-14-2007, 01:12 PM
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RE: Parkzone North American T-28 Trojan
hi guys can i use my hobbico accu-cycle pro series charger to charge my elfit-e batteries or should i use the charger that came with it
11-14-2007, 01:24 PM
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RE: Parkzone North American T-28 Trojan
I have a hobbico accu-cycle elite and I use it to charge my lipo packs. If you want to balance charge, I added the electrifly lipo balancer/charge widget and it works great with the accu-cycle. Now at least I can charge several batts at once.
11-14-2007, 01:37 PM
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RE: Parkzone North American T-28 Trojan
BTW, does anyone have any thoughts on whether these retracts will work for the T-28?
http://www.hobby-lobby.com/retracts.htm
I would love to add retractable gear to the Trojan...
http://www.hobby-lobby.com/retracts.htm
I would love to add retractable gear to the Trojan...
11-14-2007, 02:08 PM
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RE: Parkzone North American T-28 Trojan
ORIGINAL: kassun
Here is an update. I am having the following problems with my T-28.
1. On the stock radio and receiver I get no glitches on the ground, but once in the air (50-100 feet away) I am getting glitches with all my servos. (I tried my AMA field, and 2 other locations)
2. I put my futaba radio and receiver in, and now the motor fires up off an on ever few seconds and the servos glitch erratically with no input.
3. If I have no serves plugged in other than the throttle I have no problems. Once I plug in the rudder and elevator they start to glitch and the engine miss fires.
4. I don't have that problem with the stock radio and receiver system, but I have glitches in the air.
5. Both the rudder and elevator servos are digital.
6. I have tried replacing the rudder servo and using my futaba system and still get the glitches when the servo is plugged in.
I have contacted Horizon and they weren't sure what was causing my problems, esc, servos, receiver (but it didn't work with my futaba setup). They told me to ship it back, but at a cost of 40.00 to ship it, I am hoping that someone on this board has had a similar problem and was able to find a solution. If it's just servos it would cost $20.00 to fix and save me 20.00 in shipping costs.
Thanks for your time,
Kassun
Here is an update. I am having the following problems with my T-28.
1. On the stock radio and receiver I get no glitches on the ground, but once in the air (50-100 feet away) I am getting glitches with all my servos. (I tried my AMA field, and 2 other locations)
2. I put my futaba radio and receiver in, and now the motor fires up off an on ever few seconds and the servos glitch erratically with no input.
3. If I have no serves plugged in other than the throttle I have no problems. Once I plug in the rudder and elevator they start to glitch and the engine miss fires.
4. I don't have that problem with the stock radio and receiver system, but I have glitches in the air.
5. Both the rudder and elevator servos are digital.
6. I have tried replacing the rudder servo and using my futaba system and still get the glitches when the servo is plugged in.
I have contacted Horizon and they weren't sure what was causing my problems, esc, servos, receiver (but it didn't work with my futaba setup). They told me to ship it back, but at a cost of 40.00 to ship it, I am hoping that someone on this board has had a similar problem and was able to find a solution. If it's just servos it would cost $20.00 to fix and save me 20.00 in shipping costs.
Thanks for your time,
Kassun
OR
If you have another ESC or a stand alone BEC laying around try that out and see if the problem goes away.
11-14-2007, 08:25 PM
#324
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RE: Parkzone North American T-28 Trojan
I pulled everything out of my T-28 and went up to my LHS, ended up pulling 3 of my 4 servos out and replaced them with 3 Eflite S75's and went home. I installed and epoxied all of the 3 new servos (rudder, elevator, aileron) in place and now there are no more glitches. I am reserved from using the stock radio system so I am going to use my futaba system. I called back Horizon and told them what I ended up doing and they are sending me out 2 new digital servos, but i don't think I'll swap out the new Eflite I just put in for them. 
Tomorrow I'll bring her up if the snow holds out
I am thinking of getting some small foam cylinders to make scale looking gears.
-Kassun
Tomorrow I'll bring her up if the snow holds out
I am thinking of getting some small foam cylinders to make scale looking gears.
-Kassun
11-15-2007, 10:02 AM
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RE: Parkzone North American T-28 Trojan
I have not ordered a t-28 trojan yet, it seems that reading all the comments the last few weeks it may be a good ideal to wait. maybe horzion will make some changes on the next run. let them get the bugs
out. Does it seem to you guys that there is to many problems with this plane rtf kit?????
areeves
out. Does it seem to you guys that there is to many problems with this plane rtf kit?????
areeves