http://completed.shop.ebay.com/i.ht...culator&_osacat=0&_trksid=p3286.c0.m270.l1313oddly enough, i never used a slide rule. but it's pretty cool that you can get them so cheap, now. might be a fun way to teach logarithms in high school.
this old one is cooler, tho: http://www.msm.cam.ac.uk/phase-trans/2009/OTIS/
You will never regret it. Just remember that you don't fly or drive an aeroplane; you wear it. Once it becomes a part of your body, there's no going back. Best of luck to you in your training and future piloting.I plan on taking flying lessons coming up this summer or next.