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User: colonel_zentor

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  1. Re:What about Canvas? on 29 Vector Drawing Programs · · Score: 1

    I agree, Canvas is an exceptional vector drawing program, and for the money you can't go wrong - $349, $129 for students.

    Before I found Canvas, I tried making figures in Illustrator, CorelDraw and Power Point and they were either too complicated or not powerful enough. Canvas combines ease of use with a very rich feature set.

    I also use it all the time for journal articles and its the only drawing program that I've used for my thesis. I've used it primarily to create .eps files for Latex documents. But it also works well as the primary drawing package for creating good looking presentation figures.

    If you've never used it, you should definitely give it a try. It might not be the best choice for graphic designers and the like, but for engineers and scientists its the way to go. It doesn't take long before you'll be creating fantastic looking figures, you probably won't even need to look at the documentation!

  2. Re:Mach speeds on HyShot Scramjet Test Declared a Success · · Score: 1

    actually, the speed of sound doesn't change that much from sea level to 100,000 ft (even up to 260,000). at sea level the speed of sound is 1,117 ft/sec and at 100,000 ft it is 971 ft/sec. thus there is about only a 15% differece between the two. so to make it easy, just figure that the speed of sound is roughly 1000 ft/sec (681 mph) for any altitude. so mach 7.6 is about 7,600 ft/sec or 5,181 mph. mach number is typically quoted because engineers love non-dimensional numbers.