DanP. is on the right track.I have used those fuses in model rocketry.You take your fingernail and scratch the end exposing some of the powder.Then they light VERY easy.
I taped a wire to the fuse and attatched leads to the other ends of the wire.You know where I'm going with this.An electrical current from two AA's heated the wire hot enough to light the fuse.
Since the Rx doesn't send enough of a current to heat the wire enough,a micro servo between a battery and fuse could make the connection.
Easy do for in-flight ignition.