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#11
11-01-2011, 01:33 AM
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How can she be shy if she is a slu..
Oh.. wait one.. slats! My bad.. thought you were talking about something else! 
__________________
Theres a reason for instrumenting a plane for test..
That being a pilots's 'perception' of what is going on can be very different from what is 'actually' going on. 
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#13
11-01-2011, 06:54 AM
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Here are the values the RAE determined in Flight test Source AVIA 6/2394 BF109E Evaluation
 These are 1G values. So slat deployment under G will be Whatever number you use (ASI or trailing) from these x SQR of the G Last edited by IvanK; 11-01-2011 at 06:57 AM.
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#15
11-01-2011, 10:58 AM
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Quote:
Last edited by IvanK; 11-01-2011 at 11:14 AM.
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#16
11-01-2011, 03:40 PM
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"Normal" by RLM definition means it was a little worse than the finish of an aircraft just off the production line and is intended to representative of an operational aircraft in mid-life. Sort of like the USAAF's "combat weight" (~60% fuel/oil) is intended to depict an operational aircraft encountering the enemy during the target portion of the mission profile. The polar gives excellent agreement with the RAE measurements. It takes the Clmax out a few decimal places from the RAE report (~1.45), refines the opening CL(~.84), and gives you the 2D AoA(~17.5 degrees). The slats begin to open at about 8 degrees and are fully deployed by ~11.5 degrees. The wing is stalled at ~17.5 degrees with the body angle of course being the induced AoA + Angle of incidence.  It should help considerably. Last edited by Crumpp; 11-01-2011 at 03:53 PM.
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#17
11-01-2011, 04:21 PM
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Regardings Crumpps chart, "Spaltklappen" and "Spreizklappen" are two different types of flaps, not leading edge slats. The slats don't open gradually. But from that polar and the RAF test, it should be easy to derive the AoA of ~ 8° at which they bang open.
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#18
11-01-2011, 05:57 PM
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Neither of those polars is even in the discussion nor included in the values presented. Quote:
The slats open as required and the amount can be precisely controlled by the pilot. From open to close in the Bf-109 is ~2.5 degrees of angle of attack. A pilot can move through than little amount of angle so fast it would seem that they either open or closed. The reality is a pilot can control them and they will only open the amount required. If you knew how to read a polar, you would know that as the shape of the curve would depict it if the slats could only be fully open or fully closed. Simply put, there would be a shift in the polar and not a smooth transition. Just how many hours do you have flying an aircraft equipped with slats? I can tell you, you have NONE as you don't know how they work at all. You have never been up in an airplane equipped with them either. Stop presenting erroneous information as fact. I have about 400 hours flying a plane equipped with slats that work just like the Bf-109's. It is called a "stick" and it is there for the pilot to command the airplane. This is me piloting my airplane a few years ago. Last edited by Crumpp; 11-01-2011 at 06:11 PM.
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#20
11-01-2011, 06:29 PM
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Image for those not familiar with different types of flaps Last edited by CaptainDoggles; 11-01-2011 at 06:34 PM.
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Linear Mode
