On its downstream side, each fly weight 22 has a sloping face 25 which cooperates with {TAIL ~ a forwardly divergent conical surface} 26 provided on the upstream side of {HEAD ~ the nut} 18 
On its downstream side , each fly weight 22 has a sloping face 25 which cooperates with { TAIL ~ a forwardly divergent conical surface } 26 provided on the upstream side of { HEAD ~ the nut } 18
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH