On Nov 20, 10:00 am, Brian wrote:

Do I need to perform a check ride to get an additional category and/or
class rating?
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No, a check ride is not required. Rather, you will need to follow the
provisions of 14 CFR 61.321, which requires the following:


The private rated glider pilot does not hold a sport pilot certificate
with any category or class so there is no existing (sport pilot)
rating for the airplane category to be added to.

I remain unconvinced that a private rated glider pilot can add sport
airplane privileges without a flight test. Anyone that thinks
otherwise please provide a reference to the appropriate regulation
rather than an interpretation of someone else's comment.

61.307 defines the requirement and references some exceptions to the
requirements. I see nothing that allows a private rated glider pilot
to be exempted.

Andy