Hello Guys, I am working on getting the Roban Bell 412 ready to test fly and I...
Jason S.
Hello Guys,
I am working on getting the Roban Bell 412 ready to test fly and I was in the process of doing some blade tracking and I am getting some significant shaking of the helicopter. I am systematically working through each component and I already re-balanced the tail blades and they are perfect on the Koll Rotor Pro and the the main blades are all within a gram of each other, but could certainly use some adjustment, mainly to the CG.
Anyways, when I took the head off and ran it back up, it seems to smooth a little bit, but I noticed what I thought might be a slightly off main shaft and this is what I found. Let me know your guys thoughts and where I might be able to source another main shaft! Thanks.
2 Comments
Just goes to show you how a little deviation can cause big issues!
I agree Michael, I seems very minor, but its certainly causing some sizeable issues. I believe the .005" is just too much and get some blades on there and the issue is magnified!
Luckily, I was able to find a couple main shafts for the Roban Bell 412 from Baumann Helikopter in Switzerland and while shipping was expensive, they are the only ones who had some in stock, so I ordered two and then a bunch of spares to maximize shipping cost.