# What is this feature on a Piaggio P.180? [duplicate]

What is this feature on a Piaggio P.180?

I believe it's called a dolphin tail, but why is it exactly there and what is it for and why don't all airplanes have this?

• It's called a strake, this question explains what they're for and how they work – Pondlife Sep 15 '15 at 23:54
• My question is different because I have a few other questions that I want answered instead of just one question. – Ethan Sep 16 '15 at 1:02
• I don't want to be difficult, but I don't see anything in this question that isn't answered in the other one: it tells you what strakes are, why they're positioned at the tail, and which types of planes often need them. If you're sure that your question is different, I suggest that you edit to give some more information about exactly what isn't answered in the other one. – Pondlife Sep 16 '15 at 1:17
• why can't all airplanes have this - who said that they can't? Whether they are required or not or would improve performance is another matter. – Simon Sep 16 '15 at 5:41