212 Hydraulics off
When converting a 205 to the 212 rotor system, the 212 hub is used but the inboard fittings are replaced with a special STC part which applies a different bias to the TT straps. This allows the collective to be raised and lowered, hydraulics off, much like the stock 205 with single hydraulic (No1) collective servo switched off, but the fittings are not adjustable like the stock 205 fittings. Worked OK. A "neutral force" range in the cruise torque settings, but progressively harder to raise or lower and the high and low end.
Doc
Last edited by Helicopter doctor; 26th Jun 2016 at 05:00.