View Full Version : Vbar drops the nose
I have the Vbar set on a Stratus type helicopter. It is seems to be dropping the nose at a pretty quick rate. It is happens in a hover and gets real bad as more positive collective is applied. On the bench the swash is level throughout the collective range. The machine is a tiny bit tail heavy and it is a 90 sized nitro so it has more vibrations than the electrics. I was just wondering if you guys have any ideas.
I would post my file setup file but I cant figure out how to do it. Can I zip it then post it?
Mike
Here is my file is zip format.
Flybar-less
03-14-2008, 02:59 AM
Your file is nissing some data. Please repost. The CCPM menu helps with this by adding up and down near full collective. Also there may be some Extended parameters suitable for your heli. I don't know anything about a Reactor, so without the file I really can't help much. On the Logos a value of +14 and -14 in the CCPM menu helps this behavior.
Here is a repost of my file. What data was is missing? Mabey I dont have it filled in or someting. If this does not work it is aslo posted in the Vstabi forums english questions. For some reason this file is smaller than the one on the Vstabi forums.
Mike
http://www.vstabi.de/forum1/read.php?9,7654,7654#msg-7654
Flybar-less
03-14-2008, 10:22 AM
How does it behave inverted?
I have no idea. It is so hard to fly and it does not feel good at all. It is like a constant save. I am sure something is wrong, That is why I posted the file.
Mike
Flybar-less
03-14-2008, 11:59 AM
Just some things to check. Is the swash plate level in test mode? Is the sensor 90 degrees to main shaft, and square with heli? I use a swashplate level tool in test mode and and use the collective slider to check for improper movements. Link ratios may be very differerent for a Reactor then a Logo. I'd keep asking the Vstabi forum for specifics on your heli.
The helicopter is basicly a Stratus, It is something that I manufacture. Just think of it as a Stratus, they are very similar.
1 Swash is level in test mode and stays level throughout the colective travel (using the collective slider in test mode)
2 Sensor is 90 degrees to the main shaft and square with the heli.
3 The link ratio from the servo wheel to the bellcrank WAS 1 to 1 (20mm from center on bellcrank and servo)
4 I moved the servo balls in on the servo to 14mm resulting in a .7 to 1 ratio
5 The ratio from the inner ring of the swash to the grips is .6 to 1 (links are wider at the grips than at the inner ring)
6 I also moved the sensor from a vibration prone area that was close to the engine (have not tested yet)
Mike