thread necroing!
Aight, so… i need help, does anyone know how to do some proper CFD analysis and/or have access to a proper CFD software? i’m making an R-77 CAD model for the purposes os finding out just how draggy or not draggy it is.
DISCLAIMERS:
i am NOT a CAD designer by trade nor an engineer, therefore the model is not gonna be a perfect 1:1 of the R-77, the main areas that are wrong and may or may be wrong are:
The nose cone geometry
The wings size, shape and placement
The grid fin mountings are entirely different as i do not have the skills to recreate the ones on the real missile. They may also difer in placement
The rear body of the missile.
with this out of the way, here are some screenshots of the model
Problem with finding out the drag is that you would have to find the width of the grid fins each lattice. They form wedge with small angles, that would have to be modelled too, which is pretty hard to do from just images, but they indeed taper, which you mislooked, it may effect the simulation significantly
Other than this, it would be better to have it as comparision to aim120a/b and c5.
also as i said before, better make a amraam model as comparision, as the simulation may not give the real IRL values at it might not be calibrated to it, however with results for both missile, we can relatively compare if in game values are accurate or not
amraam should be easier to model
( i suck at modelling, cant make shit, only remember making a nice modular swingy thingy which took me days )
on basis on known width, i pixel mapped and found out the distances, note there will be around ± 5 to ±10mm of innacuracy, you would have to round off some values while making the model.
measurements in milimeters.
( i just noticed, dimensions were given in format of inches already… )
