Jimmy ,

If you have a Palm with Palm OS 3.0 or higher, or even a Pocket PC, you can download a number of free or shareware E6-B calculators from [link]http://www.palmflying.com/calce6b.html[/link].

[link=http://www.palmflying.com/copilot.html]CoPilot 4.8[/link] for Palm users gets high marks. I had an earlier version on my phone and it was pretty cool.

I'm betting most if not all of them will calculate TAS. I know that CoPilot will let you use knots or mph.