On Saturday, April 2, 2016 at 5:26:50 AM UTC-6, Jim Kellett wrote:
On Friday, April 1, 2016 at 10:48:59 PM UTC-4, BobW wrote:

Of greater importance - thinks I - than "merely" WHAT a person's opinions are,
is WHY they are. So by all means, share that part, too! Because it's the "why"
bits that tend to drive formation, growth and development of the "what" bits.

snip

Great thread! Two thoughts:
1. First, with regards to "why" vs. "what", with every passing decade we learn more and more about how human brains work, and many of the discoveries reveal that what we have always THOUGHT just ain't so. For example, several studies (no, this isn't an April Fool joke!) have shown that risk-taking behavior is strongly affected by physiology. For example, you're more likely to take the risks of a low save if you happen to prefer spicy foods! (See http://www.nbcnews.com/health/your-l...udy-6C10851877) Maybe the 'chuckleheads' are unfortunately addicted to jalapenos . . . and just can't help it. And you simply can't 'un-teach' an individual's fundamental neurology.

2. Second, on the question of what is a proper 'safe' altitude for the XC pilot, the answer, I believe (based on 50+ years of soaring experience, including 35 as a CFI) is the famous "IT DEPENDS". Over an airport in the pattern? Over unlandable terrain? Over a large, flat, open field? In a 1-26? In an ASG-29? No wind or strong gusty wind? I strongly believe that teaching 'standard' numbers for such situations is a cop-out by instructors who're reverting to the simple teaching of rote (the lowest level of learning)..

What Jim says in 1. Discoveries regarding the brain are still happening. This study, published in June 2015, expands the knowledge of physiology related to the brain and body. Interesting that it was overlooked for so many years. Though the study relates to the physiology, it certainly opens the door to behavioral effects also in the sense of overall well-being, personal vulnerability, and attitude as part of the body's feedback loops.
http://www.nih.gov/news-events/nih-r...nervous-system

I like spicy peppers and try and grow them annually. They do trigger physiological effects.

I've made some low saves from 400ft, but only where I've had the option to land, once rounding the turnpoint at the same time and field hopping on the sea breeze (UK) until I climbed out again. I believe I understand the risks. I've also bailed on low save attempts, especially after about 30 minutes where I felt the conditions and expended effort might lead to 'the mistake'. By conditions, I mean heat and undetected change in winds. 30 minutes seems to be my personal limit.

As part of the scoring team, I recall an early GPS trace (1993-1994) from a UK national's pilot thermalling at 250-450 agl for 35 minutes and getting away to complete the task, in an ASH-25. You can see where he did this by looking up Daventry, UK. It was just ESE of Bourough Hill. Plenty of landable fields, if they'd been harvested. IIRC, the contests in both years were held after the harvest was well underway.

Frank Whiteley