VPlane & anolog servos

Is a requirement that only digital servos will work with VPlane?

No. Vplane runs with a 14ms Framerate which is exactly the same as the better of the Futaba Radios.
Spektrum runs with 20ms, but all analog Servos i know, are able to handle 14ms. Maybe some old analog extremly sharp designed Servos may make problems.
Planes do not have the same quick response as Helis, so this is not noticable really.

so long ... Uli
http://www.vstabi.de

Thank you I have a light 3 D plane that has good servos that are not digital that I want to use VPlane on so that is good news.