How close?

For those familiar with the Duo, how close did this guy come to being a statistic?

http://youtu.be/V8vWyk3wEhA

Not even close. It's all about energy management.

Having said that, if you think it's close, then you should not attempt
it. (Professional driver, closed course, do not attempt.)


On 12/27/2014 2:41 PM, wrote:
For those familiar with the Duo, how close did this guy come to being a statistic?

http://youtu.be/V8vWyk3wEhA

--
Dan Marotta

From the tail fin it looks like the works demo ship so it will be Biggo or
one of
the test pilots flying so not your average 1 comp and 20 weekends a year
pilot .I have seen much scarier flights from instructors showing off.
Some of those guys log hundreds of hours without touching the controls,but

the real professionals can do that at a different site every week.
Plus the xl is a dream to fly.
Jon




At 22:10 27 December 2014, Dan Marotta wrote:

Not even close. It's all about energy management.

Having said that, if you think it's close, then you should not attempt
it. (Professional driver, closed course, do not attempt.)


On 12/27/2014 2:41 PM, wrote:
For those familiar with the Duo, how close did this guy come to being a
statistic?

http://youtu.be/V8vWyk3wEhA

--
Dan Marotta

Was just thinking how deadly a stall/spin would be at that altitude.

Energy Management and proper coordination. Here is a similar maneuver from a different angle.

https://www.youtube.com/watch?v=PQqq_SDCwnA
(Skip to about 2:25 into the video)

https://www.youtube.com/watch?v=TVBIIHNt7Rg
(Double Pass)

Definitely not recommended for everyone, but with some practice this can be a very graceful and exciting demonstration. It is this kind of demonstration that can motivate younger audiences to become involved in soaring and bring new members out to soaring clubs. It is one of the few things we can do to make our sport exciting for others. When done properly this maneuver is safe.

-SW

At 02:09 28 December 2014, Sierra Whiskey wrote:
Energy Management and proper coordination. Here is a similar maneuver
from
=
a different angle.=20

https://www.youtube.com/watch?v=3DPQqq_SDCwnA
(Skip to about 2:25 into the video)

https://www.youtube.com/watch?v=3DTVBIIHNt7Rg
(Double Pass)

Definitely not recommended for everyone, but with some practice this can
be=
a very graceful and exciting demonstration. It is this kind of
demonstrati=
on that can motivate younger audiences to become involved in soaring and
br=
ing new members out to soaring clubs. It is one of the few things we can
do=
to make our sport exciting for others. When done properly this maneuver
is=
safe.=20

-SW

I have found the Duo is very safe and easy to fly however doesn't seem to
carry the energy very well in the 45 degree pull ups required to perform
the chandelle. That probably explains why he didn't do six or seven passes.

On Saturday, December 27, 2014 5:39:03 PM UTC-6, wrote:
Was just thinking how deadly a stall/spin would be at that altitude.

A stall/spin can be deadly regardless of how you enter the pattern - and is probably a lot more likely to happen during a low altitude thermalling attempt than during a well-flown low pass.

At the risk of starting up the annual low-pass flame war, if flown intelligently in a suitable glider at a suitable location and time, the low pass is one of the most exiting aspects of our sport - and is not inherently dangerous; unlike off-field landouts, to name another accepted but risky aspect of our sport.

But, like XC over tiger country, it must be approached with caution and training, with a plan for aborting if needed (traffic in the pattern, not enough energy at the go/no go point, turbulence down low, etc.). And it should NEVER be flown in a way to expose others to risk - it's just a different way to fly a pattern and landing, after all.

Those of you who don't like them - tell the pilot why. He may be doing something wrong (low over people on ground, not down the runway, too slow and low, etc) and your input may be important. But just as some pilots will firmly state that they never want to race, or fly in gaggles, or do aerobatics, or even fly XC - just because YOU don't like it doesn't mean I can't do it.

Look carefully at 0:12 and 0:29. You see the pilot push over pretty sharply. He doesn't do chandelles, but keeps the speed up through the upper part of the maneuver.

John Cohrane

Yeah, a more pronounced pushover the second time.

On Monday, December 29, 2014 6:23:52 PM UTC-6, wrote:
Yeah, a more pronounced pushover the second time.

What he is doing is unloading the wing (decreasing the angle of attack) at the top of his pullup, which removes the problem of stalling and potentially spinning. If the wing isn't making lift, it can't stall..

These kinds of low-speed, nose-high recoveries are fun to practice (at altitude, of course) - it's interesting to see what you can do with a glider at speeds below stall.

Kirk
66