Okay, so let's say I decide to add a glider rating to my certificate. Do I enter the time in the same log book I use for powered flight, and count it in my total hours? Or is it to be logged completely seperate so as not to be co-mingled? And if it is in the same book, and hours are counted, can they be applied towards total hours for other ratings?
Time is time, and glider time is as good as any. Comingling isn't a problem. Unfortunately, you will find instructors who don't understand that, and will tell you that all the requirements have to be met in powered aircraft. The only ones that actually need to be met in powered aircraft are the ones that the regulations specify.
Personally, I have a glider logbook, because there are columns for things that you want for gliders that you don't have in your other logbook, and I log the glider time in both logbooks. Total times, etc., are taken from the primary logbook, but whether I'm current on aerotow or ground launch, what specific types or N-numbers I flew (I make entries in the primary log as "gliders" rather than individual types or N-numbers) or other things I need to look at for glider currency, I get from the glider log.
The problem with this (you knew there was one, didn't you?
) is that glider pilots generally log in "hours and minutes", where power pilots generally log in "hours and tenths". You'll get rounding errors, and end up with different flight times...I'll sometimes add a "correction for rounding errors" entry in my primary log to keep things honest. It also helps that I make one entry for all the glider flights for a period of time (a day, a month, whatever) in the primary log instead of individual flights...the fewer times you make the transition from hours-and-minutes to hours-and-tenths, the fewer rounding errors you make.
Sorry to confuse you
Fly safe!
David