The best approach would be to "Mag Amp" the core with a D.C. primary winding. This is an inefficient method, but allows for a reinforcing pulse at LC resonant frequency. Saturating the core wih D.C. current eliminates any inductance value to the coil. Placing magnets in a coil core alters performance compared to air. Saturating the ferrite creates an electromagnet. Adding inductance by reducing the D.C. current would be matched by increasing the capacitance to slow the rotor R.P.M.

Air has greater inductance value to the coil then a saturated ferrite core, or permanent magnets. We can precisly control rotor speed with this "Mag Amp" core saturator primary wrap, maybe a few hundred turns of 28 gauge. This creates an additional pathway for pulsed D.C. input.

The D.C. pulse should be able to spin the tube rotor at high power alone from the same source battery that charges the tank capacitor. The core saturator would be powered by the same battery. The core should be set back away from the magnet rotor, it doesn't need to extend completely through. The core would retract all the way coupled with reduced capacitance for top sine wave R.P.M. This speed up would be coupled with a reduction in input.

The nested coils, D.C. primary and tank inductor secondary have two independent circuits. The primary is sufficient to drive the rotor independently. This can save on broken fingers on the run up. The primary can serve as an auxilliary first stage booster coil. The straight D.C. induction suppressor feature is definitely a bust, as you point out, but it allows for very fine precision tuning of the inductor for high Q factor once resonance has been achieved at a specifc R.P.M.. The primary along with the core need to be retracted completely from the secondary core for maximum efficiency under sine wave drive.

Synchro1!
This self-deception (as well).
where the surplus?
where is he from?
 
Do not you think?
 

asshole.
Time will solve.
I will not fight with you.
stupid idea.
The truth will win.
ungabunga.

@MarkE,

I witnessed the "Paradox" of increased acceleration with decreased input before. What happens between the rotor and output coils as the rotor accelerates? Power is generated in inverse proportion to the input reduction. Going from 50 to a 100 hertz by halving inductance and capacitance, doubles the rotor output. This kind of "Synchronous" motor supplies power to help run itself as it speeds up from input reduction. This motor does indeed make it's own free energy!

The rotor needs to spin it's own field strength up in the coils before it can begin to surf  the "Sine Wave". Once the rotor makes the transition to the oscillating current, it's basicly turned into a self runner.