The numbers are correct, according to the POH. The units are off,
though (as pointed out by another post). Its 58 MPH for the 151, and
44 KTS for the 161. The numbers are in line with what I have
experienced with the 161. Don't know what was changed between 151 and
161 though... I know wings were changed at some point in the warrior
line, but I think that was before 1976.