Spitfire Mk IIa performance tests - Patch 1.07.18301

[Crumpp]

I don't see how that would change the resulting TAS.

It won't but it will make it easier when doing the testing.

Are you doing these offline or online?

If online, have someone take up an airplane with an OAT gauge and record the temperature.

If off line, try a plane with an OAT at the same location as you test. Record the temperature at various altitudes. To make sure the temps are consistant, I would re-enter the same location/mission a few times to make sure the sea level OAT remains the same.

One thought, has anyone checked to make sure the weathering slider does not effect performance? Aircraft will lose performance over time as the engine/propeller wears as well as the finish.

[MiG-3U]

klem,
Don't waste your time with a charlatan, generally you are doing just fine with the tests.

There is plenty of good testing manuals available freely in the net, IMHO the best one is the USAF Flight Test Engineering Handbook, available from Scribd:

http://www.scribd.com/doc/19204672/U...ering-Handbook

It's a large file, over 700 pages but worth to read. As example the correct way to test the critical altitude can found from the section 2.5 (p. 382->).

[IvanK]

The Weathering slider is labelled "Visual weathering" it doesn't affect performance. Historical performance degradation (wear and tear) was a feature that CLOD was going to have but has at present been dropped or not yet implemented.

[klem]

Originally Posted by Crumpp

It won't but it will make it easier when doing the testing.

Are you doing these offline or online?

If online, have someone take up an airplane with an OAT gauge and record the temperature.

If off line, try a plane with an OAT at the same location as you test. Record the temperature at various altitudes. To make sure the temps are consistant, I would re-enter the same location/mission a few times to make sure the sea level OAT remains the same.

One thought, has anyone checked to make sure the weathering slider does not effect performance? Aircraft will lose performance over time as the engine/propeller wears as well as the finish.

Its no harder. The data is collected and the TAS calculated, all automatically, as described.

I am doing the tests 'online' through my own server in Multiplayer... Server
Its possible that this may produce different results to a separately connected online server, all I can do is, say, fly a few level speed tests under the same settings on ATAG and see what that does.

Temps at Altitudes (same mB setting) are consistent across the various aircraft tests. These represent several exits and entries to the sim.

The Temperature I am using is generated from the game parameter:
/// [Misc.: Ambient Temperature]
/// <para>Indicates air temperature around machine's location, in K.</para>
/// </summary>
Z_AmbientAirTemperature
There is another available which is
/// [Inst: Ambient Temperature]
/// <para>Returns ambient temperature gauge reading.</para>
/// </summary>
I_AmbientTemp
.... but that appears to be the instrument drive value so I use Z_AmbientAirTemperature

According to the manual the Weathering Slider has no effect on performance.

For my full data set see and run my Performance mission linked in my previous post.