At 13:38 20 June 2017, Chris Rollings wrote:
The belief that low-tow significantly reduces the risk of sling-shot tu
upsets is mistaken. The trigger is if the glider pitches up to about 3
degrees above the line of the rope. Being in low-tow when that
happen
simple makes the sunsequent event take about half a second longer
- no
enough extra time to greatly increase the chance of releasing before
th
critical point.

That may be so Chris, but would the start of the sequence be more
obvious to both the glider and towplane pilot? In low tow the tug is
definitely above the glider, the divergent situation should be more
immediately recognisable.

I accept that the statistics in Australia may be skewed by the
requirement for a nose hook but do they show a decrease in the
number of tug upsets?

Is it not worth some study? Are there other challenges to the use of
low tow instead of high tow? Is a procedure which is only marginally
safer still a valid consideration?