Slingshot effect

Hi all,
    While trying to guess what T$R's upcoming Chronomancer accessory
(which deals with time-travel) will be like, a question arose.  In a
Spelljamming environment is it possible to do the classic Star Trek
maneuver of slingshotting around the sun to achieve time travel.
Granted, the ship would have to have a high SR rating and a high level
person at the Helm.  Of course, staying at the edge of the sun's gravity
well would be difficult maneuver, but it could provide for some
interesting adventures.

Comments?

Erick Slazinski
sla329@???.???.??????????.com