In an earlier post DB asked for comments on his presentation; I have already provided some and, in my last post posed the question:
I would also like to see what deck ovality is achieved with these approach angles – intuitively my feeling is that the shape on the presentation for ‘too low’ might be 3°, or even 6°.
Now one of main principles contained in the presentation is that there should be no departure from a stable (level) flight until the correct shape is observed (DBs CTB - am I the only one who does not like this). As this is such an important element (for me as well as for DB) I was intrigued to know if the representation (of the correct sight picture) in the presentation was accurate - hence the question that was posed. I have now constructed the perspective drawing and have found that DB's:
- too shallow is about 10 degrees;
- correct is about 20 degrees; and
- too steep is about 35 degrees.
Now I know that this was a presentation with the intent of moving the debate on and had to exaggerate to make the point; however, having had this view provided, do we now need to seriously evaluate exactly what we mean by the correct sight picture approach (the deck ovality)?
Jim