Thomas Putnam wrote: > At this point you just have the tip of the iceberg for what you really > want. A fair piece of work remains before you have what what you think > you have. Alternatives would be to look for airframe aero data at the > NACA/NASA web site for the B-47 or to know how to interpret curves and > charts in the pilots manual. Again, I have done things like this before. > In the mean time .......
Unfortunately, I have not found much data at NTRS. I am not sure if I am making the right searches though. I will have to learn more about interpreting the graphs in the POH, as there are plenty of them. > - You have the parasite drag for the wing. There is a well established > methodology to go from one to the other. You still need something like > Horner's "Fluid Dynamic Drag" to get the drag for the rest of the > airframe and you still need to get induced drag as well. Again, > simplified methods give induced drag. Luckily, JSBSim allows coefficient buildup, so I can treat the fuselage, stabs, wings and nacelles separately. However, it may be better to put it all into DATCOM+ and get one single set of coefficients. > - Pitching moment data is for the bare airfoil you need to do some > transformations and math to get the data for the complete airframe. By > the way, the airfoil used for the horizontal stab is critical in terms > of how your plane will fly. Do you have that data too ? If not, start > thinking about how you might get it. I have a pretty accurate drawing of the ac, but not enough to figure out anything more than the thickness. It appears to be about 8%. I was going to assume that it is a NACA 0009, as well as the horizontal stab. > Look for the "DATCOM" software. It is a little difficult to use, but it > should give you everything you are looking for and need right now. Yes, > I have used it too. Already have it, and some examples to learn from. Josh Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
