I've seen exactly the same discussion on piperowner.org some time ago. If I recall correctly, no one could actually really explain why it is 97 for the T-Arrow. Same wing as the non-turbo and roughly the same weight allegedly could not explain the 18kts (!) difference. The theory above about gear override is interesting, but it is the same for the non-arrow so that doesnīt explain it either. I think the discussion ended with 1) the most likely explanation being a typo and 2) that max gliding distance does not change that much with different gliding speed (but the Rate of Descent does) so itīs more a matter of keeping close to Vy and running the checklists, identifying the problem and most importantly look for the most suitable landing spot... Sorry for not being with more help, but I thought Iīd share what I read somewhere else on precisely this issue.