murankar
Staff member
Its been a short time since I have given any updates to my Gaui X3. So far I have had problems with it, not so much the kit just myself and some of my electrics. For the My electrics its been a small battle that I think I have won at the moment.
For the kit I have a bit more setup to get done mechanically. I discovered that my new main shat has some play up and down in it. When to get the shuns and as my luck would have it I cant find the ones I need. In my video for the main shaft build you will see 6 shuns, 3 of a small size and 3 of a bigger size. The 3 bigger ones are for the main and tail drive gears and the 3 smaller ones are for the main shaft play at the gears. Its a little tricky to figure out where the smaller shuns go to take up the play. When deciding on where to shun it you have to look at one thing, tail drive gear mesh with the torque tube. If you have a tight mesh then you will want to shun the top and vise versa if the mesh is to tight.
In my case I have play in both the gears and the main shaft. Since this is the case I will work on the gear spacing first and see if there is still play in the main shaft along with gear mesh with the torque tube gear. If I still have play in the main shaft I will then shun the gears so the gear mesh of the tail drive are more closer to what it should be.
Now for the last issue, gear mesh in the rear tail box. When I assembled the original tail box I had zero play in the gear mesh or very little. They were not tight and they were not loose. After the crash I went and built the spare assembly because I noticed some cracking in the original casing. After I completed the post crash repair I did not fly the kit for some time about 1.5 months so I never went back to check it out. Last Saturday after a few flights I decided to do a thorough once over to check things out. During this look over I found the main shat issue, tail box gear mesh and a loose tail blade grip. The grip was an easy fix, take out the two screws and re thread lock the fasteners.
Before I start playing with the gear mesh in the the tail box I want to see if the other areas of concern will help with locking in the tail. I think the first 2 issues are creating some vibrations that the ZYX-S does not like which could be causing the tail not to lock in fully, or at least it does not feel like it is.
Now for the ZYX-S gyro. Since the crash the gyro still seems to be working. I though for sure that the impact would have broke it considering how cheap the unit is. Right now it is still working and if I can get over my fears I can really get to tuning this thing. I have been having a tail issue, noting like the GA250, it has been drifting tail left nose right since I have had it. On the Protos Mini it cleared up once I went to HH mode. On the Gaui it still does it even when in HH mode. Due to great timing on RCHNs part I got some info from them that has help me dial out some of the drift in the tail, still not perfect. Nick or Justin (not sure which) gave some advise on the tail that I have yet to try, due to lack of knowledge. They had mentioned that if you have a tail right (nose left) drift then its a gain issue and if you have a tail left (nose right) drift its mechanical. There solution to the later is to move the ball link in closer to center on the servo. Since I don't know what the Gaui recommended distance is I have not messed with it. My ball link is still set where it was on the Protos Mini. My other issue is not knowing if Tarot has a recommended location for the ball link. So how did I start to remove some of the drift? Well I went into the droid app with Bluetooth and adjusted the P and I gains. I increased the I gain by 5 and the P gain by 5 and now it feels like it wants to hold but at the same time it feels like it still wants to drift.
I would like to get out and do some test hovers and see if I can get the gyro dialed in while in a hover.
One last issue I just remembered. This could be a moderate issue but dont know how to fix it. During my initial setup I leveled the swash 90 degrees with a swash leveler. then I rotated the blades so they were in line with the boom and nose. I got the pitch to 0 at mid stick and then did my positive and negative pitch along with aileron. Now for the enigma, I then rotated the blades 90 degrees so I can set elevator pitch. Before I did that I check for 0 pitch at mid stick, low and behold its not. So I went through and checked if the airframe was tilted nose down or up and I did not notice anything. Since its been a while since I checked I cant remember if its negative pitch or positive pitch. I want to say it was negative because when I take off it wants to drift backwards.
I know this is a lot of info maybe you all can help in what I am not seeing.
For the kit I have a bit more setup to get done mechanically. I discovered that my new main shat has some play up and down in it. When to get the shuns and as my luck would have it I cant find the ones I need. In my video for the main shaft build you will see 6 shuns, 3 of a small size and 3 of a bigger size. The 3 bigger ones are for the main and tail drive gears and the 3 smaller ones are for the main shaft play at the gears. Its a little tricky to figure out where the smaller shuns go to take up the play. When deciding on where to shun it you have to look at one thing, tail drive gear mesh with the torque tube. If you have a tight mesh then you will want to shun the top and vise versa if the mesh is to tight.
In my case I have play in both the gears and the main shaft. Since this is the case I will work on the gear spacing first and see if there is still play in the main shaft along with gear mesh with the torque tube gear. If I still have play in the main shaft I will then shun the gears so the gear mesh of the tail drive are more closer to what it should be.
Now for the last issue, gear mesh in the rear tail box. When I assembled the original tail box I had zero play in the gear mesh or very little. They were not tight and they were not loose. After the crash I went and built the spare assembly because I noticed some cracking in the original casing. After I completed the post crash repair I did not fly the kit for some time about 1.5 months so I never went back to check it out. Last Saturday after a few flights I decided to do a thorough once over to check things out. During this look over I found the main shat issue, tail box gear mesh and a loose tail blade grip. The grip was an easy fix, take out the two screws and re thread lock the fasteners.
Before I start playing with the gear mesh in the the tail box I want to see if the other areas of concern will help with locking in the tail. I think the first 2 issues are creating some vibrations that the ZYX-S does not like which could be causing the tail not to lock in fully, or at least it does not feel like it is.
Now for the ZYX-S gyro. Since the crash the gyro still seems to be working. I though for sure that the impact would have broke it considering how cheap the unit is. Right now it is still working and if I can get over my fears I can really get to tuning this thing. I have been having a tail issue, noting like the GA250, it has been drifting tail left nose right since I have had it. On the Protos Mini it cleared up once I went to HH mode. On the Gaui it still does it even when in HH mode. Due to great timing on RCHNs part I got some info from them that has help me dial out some of the drift in the tail, still not perfect. Nick or Justin (not sure which) gave some advise on the tail that I have yet to try, due to lack of knowledge. They had mentioned that if you have a tail right (nose left) drift then its a gain issue and if you have a tail left (nose right) drift its mechanical. There solution to the later is to move the ball link in closer to center on the servo. Since I don't know what the Gaui recommended distance is I have not messed with it. My ball link is still set where it was on the Protos Mini. My other issue is not knowing if Tarot has a recommended location for the ball link. So how did I start to remove some of the drift? Well I went into the droid app with Bluetooth and adjusted the P and I gains. I increased the I gain by 5 and the P gain by 5 and now it feels like it wants to hold but at the same time it feels like it still wants to drift.
I would like to get out and do some test hovers and see if I can get the gyro dialed in while in a hover.
One last issue I just remembered. This could be a moderate issue but dont know how to fix it. During my initial setup I leveled the swash 90 degrees with a swash leveler. then I rotated the blades so they were in line with the boom and nose. I got the pitch to 0 at mid stick and then did my positive and negative pitch along with aileron. Now for the enigma, I then rotated the blades 90 degrees so I can set elevator pitch. Before I did that I check for 0 pitch at mid stick, low and behold its not. So I went through and checked if the airframe was tilted nose down or up and I did not notice anything. Since its been a while since I checked I cant remember if its negative pitch or positive pitch. I want to say it was negative because when I take off it wants to drift backwards.
I know this is a lot of info maybe you all can help in what I am not seeing.
. This is the first time I have had a 450 do that for me so I don't know if its just the blades, just the collective range or both. I do know that these blades will float just a little bit more just because they are bigger by 1mm, apparently this makes a huge difference. As for the pitch I am sure this also helped in the over all performance. Yesterday this kit was sluggish with slow responses, now this thing is awake and humming. Now I really need to get to a field so I can tune this gyro.