Yes, this radio-controlled B-29 is equipped with an X-1 rocket. It’s powered by “4 motors each swing 28 inch props producing over 200 lbs of thrust.” Video after the jump.
The B-29 is very much a gas model. However, I think most anyone interested in any form of RC can appreciate this effort. The X-1 is powered by rocket motor that is ignited onboard via transmitter