AERO

Started by debgeo, March 11, 2014, 12:51:10 PM

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yarp

Quote from: metermatch on March 23, 2014, 10:08:42 AM
They couldn't go any faster than 88 mph because whenever they did, they went back in time...

Jeff

ha!

Blue

Quote from: WOODY@DDLLC on March 25, 2014, 03:08:07 PM
This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes.
Actually, until we get to much higher Rn the lowest drag shape will be a natural laminar flow design very close to a NACA 66xxx to 67xxx.  Above 100 million Rn, there's a small advantage to moving the max thickness point a little more forward.  Anyone building for up to 400 mph is well below this.

Above 500 mph, we're getting into transonics and that leads to super-critical airfoils with less laminar flow and flatter velocity profiles.  Supersonic, we go towards "bi-convex" airfoils to minimize wave drag.  In all of this, the separation drag at the rear and under the vehicle is the biggest area of improvement available for LSR. 

tauruck

Quote from: Stainless1 on March 17, 2014, 06:32:28 AM
Quote from: Jack Gifford on March 16, 2014, 10:09:37 PM
Quote from: SteveM on March 16, 2014, 03:13:18 PM... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.

Maybe for 8 furlongs...  :-D

Bob,  :-D :-D :-D