Anvil* wrote:
I haven't found any references to this idea.
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You would want to search rotary rocket
Here's one reference:
http://www.spaceandtech.com/spacedat...tary_sum.shtml

Scaling that up you may want to research Hiller's work on flying
cranes:
http://avia.russian.ee/helicopters_e...r_crane-r.html
There were problems with using gas turbines at the tip, so research
was going towards a resonant pulse-jet (valveless) design that would
allow even bigger flying crane designs.

These ideas are opposite to my proposal of using the torque
from the rocket turbopump and a "dry" rotor.

Also, Armadillo aerospace tried rotors with tip jets and found
it's hard to control the fluid column in the blade.

--
-meiza