Vario Fenestron upgrade
The stock bell crank puts a heavy control load onto the pitch slider from the bottom ball joint. With the high loads from the Fenestron, this can bend the control wire, which can cause it to shear close to the bearing face -then no control at all ! This modification controls the slider equally from top & bottom, without any twisting action. The machined, one piece bell crank is also more rigid and does not flex. Use your existing bearings with this upgrade.
The stock bell crank puts a heavy control load onto the pitch slider from the bottom ball joint. With the high loads from the Fenestron, this can bend the control wire, which can cause it to shear close to the bearing face -then no control at all ! This modification controls the slider equally from top & bottom, without any twisting action. The machined, one piece bell crank is also more rigid and does not flex. Use your existing bearings with this upgrade.
The stock bell crank puts a heavy control load onto the pitch slider from the bottom ball joint. With the high loads from the Fenestron, this can bend the control wire, which can cause it to shear close to the bearing face -then no control at all ! This modification controls the slider equally from top & bottom, without any twisting action. The machined, one piece bell crank is also more rigid and does not flex. Use your existing bearings with this upgrade.