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    Need help to understand airflow

    ALL of the airflow shown is turbulent. There is no laminar flow for RN> ~ 500K and most full scale a/c are in the 2x10^6 and greater in flight. What the tufts show is whether it is immersed in free stream or in an 'eddy' created during full blown boundary layer separation. BL behavior may be...
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    Need help to understand airflow

    I would disagree the last statement. One of the most important design considerations forward of max cross sectional area of an aircraft is to minimize the velocity gradient from spinner to Max Cross section. The Mustang had three monstrous drag advantages built in to the design: 1.) Conical...
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    Wanted: Bruce Carmichael Personal Aircraft Drag Reduction Book

    Hoerner's Drag book is pretty good compilation of all components of parasite and pressure drag.
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    Aileron Design - What works and why?

    Get some soaring time, and all your 'yaw in turning' blues will go away with now instinctive rudder input. Those tufts will do wonders for learning the difference between a 'skid' and a 'carved' turn.
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    German P-51????

    Corky Meyer is a highly respected pilot whose opinions deserve respect. I had an opportunity to talk to him just after he published his book - at Oshkosh circa 2007? Because of the high investment and maintenance costs of Warbirds, nobody (including Meyer) pushed either the P-51D or P-47D that...
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    German P-51????

    Respectfully - the availability of C3 was always there for Rechlin Test operations and the 51B when captured was using 130. The P-51B 'light' at 61 in. MP was delivering 445mph in May 1943 test flights - as well as 4100fpm ROC down low. There was never a reason to load the captured P-51B with...
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    German P-51????

    The P-47D-2-RE shown next to the 479th FG P-51D was captured on November 7, 1944. The 358FS/355FG lost two running out of fuel and landing near Liege. The P-47 that went to Rechlin was undamaged, gear down landing - te other a belly landing. Bill Roach was flying YF-U 42-22490 'Beetle" which...
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    German P-51????

    Absoutely not. The Germans captured their Mustang on D-Day. Tom Fraser, 4th FG landed P-51B 43-24825 QP-G. Lost in cloud cover late afternoon, disoriented, landed intact in what he thought was an English field - but everyone he met spoke German. It went to Rechlin until captured by US forces...
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    Mathematics in aircraft design

    I haven't heard a peep. I suppose best approach would be to contact Smithsonian to see if Mustang Collection still available - maybe Aer Library to see is their copy has the MISC folder.
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    Mathematics in aircraft design

    Brad - I prefer to upload the folder just once. If the website here doesn't permit it I will send the stuff to you. I just sent an email to Admin about uploading into Media
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    Mathematics in aircraft design

    The Misc folder contains three reports - 2 structural and 1 Performance - total ~ 80Mb, 500+ .jpg docs. I can send vis Wetransfer to an email address. Does this site have a destination address for docs?
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    Mathematics in aircraft design

    I mentioned this once above, but a PhD in 'practical" stress analysis is imbedded in the MISC folder f the Smithsonian P-51 Mustang Collection. Both a 500 page NAA Report of the structural analysis of the P-51D-5-NA wing as well as the 70 page NAA NA-8449 Performance Analysis for the P51D-5-NA...
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    Mathematics in aircraft design

    Vigilant/Mark - I agree your comments about 'deathless prose' regarding Peery. That said, IMO, understanding his material and applying it correctly is a minimum to proceed in detail stress analysis.
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    Mathematics in aircraft design

    I believe RDJ reduced your question succinctly - namely "In general, my point is to not worry too much about the math. That will be the least of your design hurdles". As I reflect on me - at 23 with a MS in Aero, match through Calculus of Variations, steeped in Navier-Stokes and annointed in...
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