Aircraft peformances, is this joke ?

[ACE-OF-ACES]

Originally Posted by jf1981

I tested other parameters of Spit Mk I

- Stall speed is too low by approximately 15 mph flaps up, by 10 mph flaps down
- Take off run is longer by approximately 30%

Thought the take off run is not a so big deal, it shows that the reacceleration from medium and low speed time is longer, the performance is not as good as it shall be.

The stall speed, on the opposite, makes for better turns at low speed. It makes the gap between radius of turn of Bf 109 and spit wider than it should be.

Hey jf1981

You might want to hook up with klem and others who have been doing some testing.. In that what I have found over the years is most of the so called FM errors turn out to be pilot errors and or a misunderstanding of the test methods and or conditions. Not to mention all the little aspects of the simulated world that can have an effect on the results. For example something as little as the atmospheric conditions of the simulated world/map v.s. the standard atmosphere conditions that most if not all real world data is presented in. The following thread is a good example of which I speak..

http://forum.1cpublishing.eu/showthr...t=33077&page=5

With that said, if you really want to get serious about testing the FM than you have to get serious about collecting test data during your test flights. Here is a link to the C# script file that klem and others are using as a baseline for collecting test data during test flights.

http://forum.1cpublishing.eu/showthread.php?t=27552

Note it saves the data to a standard csv file format that you can use EXCEL or OpenOffice (which is free) to graph and compare the data.

I highly recommend you use this script during your flight tests! Because if you don't, when you make a claim, for example such an such is approximately 30% off, there will always be doubt as to if this error was due to pilot error or an error in the FM. By collecting (logging) the test data during the test flight you will not only be able to remove the word 'approximately' from your statements but also reduce if not remove any doubt as that the error was due to pilot error.