Originally Posted by waldopepper42
Is it possible that the 9 and the 7 were simply transposed in error? 79 becoming 97
Seems a co-incidence that it's the same two numbers....?
For a while I had the same thought, but it would be strange for Piper to leave a misprint like that in a POH for so long. I've found graphs for the Arrow IV, both turbo and non-turbo variants so we've got a straight comparison
Non-turbo Arrow IV:
Turbo Arrow IV:
If I use these to work out the glide distance from 10.000 ft for both variants I get 16,5 Nm (1:10) for the non-turbo and 16 Nm (1:9,7) for the turbo, so the performance is almost the same. The difference could be an error on my side.
And to keep things interesting, the first graph shows the glide speed for the non-turbo as 78 kt instead of 79!