davidrinnan
New member
I bought a umx turbo timber and have had lots of fun with it. Flies very nice. I "dropped" it in the water (...). Had no way to fix it at the summer house so I bought a new one. Currently both are flying but the old one has a disconnected Flap servo.
Anyways the new plane out of the box had an issue where it is aiming down with SAFE ON. I could handle it and trimmed it out on the transmitter to allow me to fly the maiden. When I landed after the short flight I put it back in normal mode SAFE OFF, as always before taking out the battery since this takes all control surfaces back to their current zero position as they are electronically and mechanically trimmed.
I reset my digital trims to 0 and began adjusting the elevator mechanically, but I noticed it was pretty perfectly aligned. So I began switching between SAFE on and off on dry land on a flat surface and noticed that once I turned SAFE on the elevator points down. My experience from other SAFE planes is the opposite actually. Safe on usually give you a little bit of elevator up.
If I mechanically trim the airplane to fly straight with SAFE ON it will almost stall if I then turn SAFE OFF.
I can basically not find a mechanically trimmed setting where the airplane will be able to fly straight with SAFE on and off.
What I have done now is to mechanically trim the elevator to fly straight with SAFE and if I turn SAFE OFF when flying I have to max out the elevator DOWN trim on the transmitter in order to be able to fly.
It is easy to see the pretty big difference in elevator position when switching SAFE on and off when on a flat surface. It is too big to be able to find a good in-between middle ground.
I have no clue what to do to fix this problem. I have tried my old umx turbo timber and it flies perfectly without these issues, just a slight favour to go a little up with SAFE on.
I have a DX9 transmitter. I don't have the slats installed. Everything is stock apart from the batteries where I use a 500mah.
Anyways the new plane out of the box had an issue where it is aiming down with SAFE ON. I could handle it and trimmed it out on the transmitter to allow me to fly the maiden. When I landed after the short flight I put it back in normal mode SAFE OFF, as always before taking out the battery since this takes all control surfaces back to their current zero position as they are electronically and mechanically trimmed.
I reset my digital trims to 0 and began adjusting the elevator mechanically, but I noticed it was pretty perfectly aligned. So I began switching between SAFE on and off on dry land on a flat surface and noticed that once I turned SAFE on the elevator points down. My experience from other SAFE planes is the opposite actually. Safe on usually give you a little bit of elevator up.
If I mechanically trim the airplane to fly straight with SAFE ON it will almost stall if I then turn SAFE OFF.
I can basically not find a mechanically trimmed setting where the airplane will be able to fly straight with SAFE on and off.
What I have done now is to mechanically trim the elevator to fly straight with SAFE and if I turn SAFE OFF when flying I have to max out the elevator DOWN trim on the transmitter in order to be able to fly.
It is easy to see the pretty big difference in elevator position when switching SAFE on and off when on a flat surface. It is too big to be able to find a good in-between middle ground.
I have no clue what to do to fix this problem. I have tried my old umx turbo timber and it flies perfectly without these issues, just a slight favour to go a little up with SAFE on.
I have a DX9 transmitter. I don't have the slats installed. Everything is stock apart from the batteries where I use a 500mah.