May 24, 2010, 11:49 PM U down with EPP? Ya u know me United States, CA, Ventura County Joined Sep 2008 3,253 Posts Cool Mach Calculator Check this out: http://exploration.grc.nasa.gov/educ...ket/machu.html Weldon = 3400 feet altitude. Speed of sound = 752mph. John flew 445mph. Mach = 0.591. True Air Speed @ Top of hill = 445mph + 55mph gust = 500mph. Mach = 0.664. Wave drag is non-negligible @ Mach 0.7+ Assuming 65mph windspeed: Mach 0.7 = 527mph 527mph - 65mph = 462mph 462mph is a "soft limit" for gliders with non-supercritical airfoils/surfaces/fusulages etc. It is likely that with the K100 this soft limit will be reached this year assuming its airfoil is good to Mach 0.7. If a suitable supercritical airfoil can be developed that can push this limit up to Mach 0.85: Mach 0.85 = 640mph Assumed wind speed = 75mph 640mph - 75mph = 565mph top "radar" speed. Interesting realm we find ourselves pushing into. Last edited by Aerogance; May 24, 2010 at 11:59 PM.
 May 25, 2010, 05:28 AM Mach 0.261 ... Hiccup of Wiggy Wiggy Poo, England! Joined Mar 2006 1,258 Posts Cool... just worked out my mach speed... Not very impressive! But hey, work down the street, stop anyone, ask them for their Mach no... Regards George
May 25, 2010, 05:36 AM
Registered User
Joined Jul 2006
119 Posts
Quote:
 Originally Posted by Geo420 Cool... just worked out my mach speed... Not very impressive! But hey, work down the street, stop anyone, ask them for their Mach no... Regards George
Go on then, Walk down the street and knock on my door and ask me
 May 25, 2010, 06:09 AM Mach 0.261 ... Hiccup of Wiggy Wiggy Poo, England! Joined Mar 2006 1,258 Posts er Adam, whats your mach then doood?
 May 16, 2011, 03:25 AM U down with EPP? Ya u know me United States, CA, Ventura County Joined Sep 2008 3,253 Posts My prediction came true, odd looking back!