Dear IXEG,
First of all, congratulations for the release of this wonderful simulation ! The job you have done is impressive and it made me going seriously on XP10.
It's a real joy to fly and to see that systems interacting realistically such as landing lights wattage impacting electrical sources loads.
As I am keen on flight modeling and aircraft performance and because you use your own model, I carried out several tests vs FCTM of the 737-300 to check the basic aero model.
It turned out that you the model is quite close to the real thing. However I noticed 3 small gaps you could fine tune :
- the wings generate too much lift: IXEG AOA are always below FCTM AOA by almost 1 deg
- this discrepancy may affect induced drag as a side effect. It seems that you fine tuned drag so that descent path match at heavy weight (121 000 lbs). If you carry out a 80 000 lbs descent test, a slight gap in flight path from FL 200 start to be visible.
- braking distance: I used unfactored figures at max manual braking + rev + spoiler. Landing distance are shorter than what FCTM says. I dunno if it's reverse thrust or wheel braking that is too strong. Further investigation is required there.
- 1 Engine out performance is quite good as you fall into an acceptable error margin for N1. A gap start to arise at high altitude and high weight (15000 ft/135000 lbs) but this may link to lift/issue cited above.
I didn't have much time to check engine model, but will do as soon as I can.
Please, take it as constructive critcism. I really enjoy your bird and wih you a great success.
Philippe
IXEG 737-300.xlsx
