109 advice needed (climb)

[ACE-OF-ACES]

Originally Posted by CaptainDoggles

You are mistaken.

Interesting.. So your saying that that all the PC flight sims since the mid 1990s who claim to have implemented a 6DOF FM were lying to us?

Emmmmm.. don't take this personal, but we will have to agree to disagree on that, sorry

Originally Posted by CaptainDoggles

First of all the equations governing fluid flow, the Navier Stokes equations, have no known solution. Modern mathematics does not have a method for determining the solution unless certain simplifying assumptions are made. The only way to get an approximate solution is to use a numeric solver, and these are very computationally expensive.

Interesting, but fluid flow equations and navier stokes equations are not used in a 6DOF FM

Originally Posted by CaptainDoggles

I guarantee that Cliffs of Dover is not running numerical solutions to the fully viscous Navier Stokes equations.

Hence me stating 6DOF and not fluid flow or navier stokes

Originally Posted by CaptainDoggles

There are certain assumptions that are "good enough" for the consumer flight sim market, and these are in use in all flight sims.

Not only is 6DOF good enough for PC game flight simulation, but it is good enough for most if not all military flight simulations.

On that note, don't confuse flight simulation with aircraft design technics (which you appear to be doing)

Where fluid flow and navier stokes equations are used a lot in aircraft design, and yes the last time I check the full up fluid flow FMs were too CPU intensive to be run in real time.

Granted there have been a few PC flight sims that claimed to be using fluid flow (real-time computational fluid dynamics (CFDs)) for their FM, as was the case back in 1995 with Flight Unlimited. But the equations had to be stripped down (dumb down) to run in real time on a PC such that all the benefits of a fluid flow FM were lost

Originally Posted by CaptainDoggles

You can keep using the term "6DOF FM" which I assume means that the aircraft are free to move in all six degrees of freedom.

You assume correctly

Originally Posted by CaptainDoggles

That is not the same as a flight model that corresponds 1:1 with reality.

I got news for you, no simulation is 1:1 with reality