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Search: Posts Made By: FCeng84
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Forum: Tech Log
21st Feb 2017, 06:26
Replies: 32
Views: 9,563
Posted By FCeng84

High speed > high weight?

Please explain. Airplane mass and touchdown sink rate affect gear load. How does speed get involved?
Forum: Tech Log
21st Feb 2017, 01:29
Replies: 32
Views: 9,563
Posted By FCeng84

Data shows a clear example

FE Hoppy - thanks for the document you linked. Page 24 therein clearly shows a lift curve that shifts down/right as slats that extend forward and downward are deployed. For such a wing as that one...
Forum: Tech Log
20th Feb 2017, 20:10
Replies: 32
Views: 9,563
Posted By FCeng84

Slat must decrease Cl if touchdown pitch attitude increases

If extending slats causes touchdown pitch attitude to be higher at the same speed the slats must decrease lift at a given angle-of-attack. Every set of lift curves I am familiar with shows almost no...
Forum: Tech Log
16th Feb 2017, 16:17
Replies: 32
Views: 9,563
Posted By FCeng84

Defining Approach Speed for Minimum Runway Length

MFS and TA - thanks for your comments regarding landing performance. Are you aware of how consideration of the touchdown attitude vs. touchdown speed sweet spot works its way into Vref or other...
Forum: Tech Log
15th Feb 2017, 22:41
Replies: 32
Views: 9,563
Posted By FCeng84

Dumping lift is the name of the game

MFS - I agree completely. My point about landing at a higher attitude is that brake effectiveness is directly related to dumping lift so that there is more weight on the wheels to make use of...
Forum: Tech Log
15th Feb 2017, 19:06
Replies: 32
Views: 9,563
Posted By FCeng84

Approach / Landing with Flaps Up

Do you have a reference for pilot procedure to fly faster in order to reduce touchdown pitch attitude? All I can find is increments above Vref as a function of flap position.

One of the keys to...
Forum: Tech Log
14th Feb 2017, 18:44
Replies: 32
Views: 9,563
Posted By FCeng84

Approach attitude and landing performance

The idea that landing at a higher speed improves landing performance by reducing the angle through which the airplane must derotate (and thus the time it takes to derotate) is a new one and seems...
Forum: Tech Log
14th Feb 2017, 18:26
Replies: 32
Views: 9,563
Posted By FCeng84

Slats impact on lift

Leading edge slats have very little impact on the lift generated at low to moderate angles of attack. The motivation for leading edge slats is to extend the lift curve at higher angles of attack to...
Forum: Tech Log
13th Feb 2017, 16:21
Replies: 32
Views: 9,563
Posted By FCeng84

Pitch Attitude vs. Pitching Moment

Care must be taken to distinguish between pitch attitude and pitching moment. Changing the CP (fore / aft) will induce a pitching moment change that must be balanced via the tail (elevator and/or...
Showing results 1 to 9 of 9


 
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