Unreasonable Request

I offered to run some CFD for Paul Breed of a simple "rocket like" geometry - a 8" by 8' tube.  I picked an arbitrary ogive nose cone and a bluff tail.

Here is the Mach number contour for the 150 m/s case.

The free stream conditions were:

M 0.468

p 27580. Pa

rho 0.376 kg/m^3

T 255.4 K

V 150.0 m/s

Drag 55.1 N

The calculated Cd is 0.40.   300 m/s and 600 m/s results to follow.

Test Fitting

Another Part

Shiny New Parts

This is the injector for the next version of the N2O-Propane engine.

What is Love?

My wife bought me a Miller TIG welder as an anniversary present.  I love her very much. 

Happy holidays!