109 e4 performance

[Crumpp]

Nana, I think there is good reason to believe that the REAL obtained mean value was not on the centre line of the spec bandwidth. This is not how engineering works. The mean value of a produced thing is NEVER on the targeted nominal performance. My years in the engineering business taught me that. I have NEVER seen one produced thing that had its mean value on the nominal spec.

There is no credible reason to doubt Mtt's figures in the absence of facts.

Crumpp says:
They knew much more about their aircraft design than any of us and were being paid to deliver those aircraft. Misrepresenting the mean would have been quickly noticed by the customer.

Well I think the Mtt facts (the 13 tested planes that are on average below the centre spec line - 10 out of 13 are below = average < centre spec line) are there that support my opinion that for the 109G the type was on average below the centre spec line and there is good chances that this is the case for any type coming from this company hence also for th 109E.

You insist that these 13 are not representative and keep arguing that it should be the centre spec line that should be taken as the mean value for the 109 while there is absolutely NO fact that consolidates this opinion. Please provide us with some data from test flown 109E that reach 500 kph and more but beware we need data from several individual tests with this result to support your view.

PS: The centre spec line has nothing to say except that this is just the middle value between the acceptance bandwidth. We have no clue that Mtt ever attempted in fact to reach 500 kph (that is this is the aimed nominal value they took into account during the design process) and there is NO facts supporting that the average 109E ever achieved this performance.

[Robo.]

Originally Posted by Crumpp

There is no credible reason to doubt Mtt's figures in the absence of facts.

There is a good reason to challenge any data if we really care to have the planes modelled correctly, e.g. close to the so called 'real life'.

First of all, the actual limit range is massive. (btw. I very much agree with Stormcrows insight regarding the tolerance and actual treshold being slightly lower that 500km/h, which plus some subtle variation within that treshold as he suggested would be a superb feature! (for all planes obviously))

Also, there is no details such as what engine and what settings exactly would result in that top speed. If thats DB 601Aa at full power (1.45ata / 2500 RPM), that is absolutely OK.

[TomcatViP]

Originally Posted by Robo.

...which plus some subtle variation within that treshold as he suggested would be a superb feature! (for all planes obviously))
....

It's alrdy in the game I think at least for the Hurri.