Soaring video goes viral - 250,000 views in three days

On Tue, 10 Sep 2013 08:22:23 -0700, Sean F (F2) wrote:

On Tuesday, September 10, 2013 9:52:26 AM UTC-4, son_of_flubber wrote:
http://www.youtube.com/watch?v=t2sozrof3HY



Youtube video of a paper sailplane thermally over an electric stove.

Wow. I sense a string might be involved but impressive nonetheless.

I think the circle was a bit irregular for a string to be involved, but
I'd guess it certainly didn't do that with the rather rough trim setup
shown in the video: plenty of up-trim, but what he did to get the tight
turn wasn't obvious. I'd think a few test gliders were in order before
trying it over the stove - either that or a set of oven gloves would be
needed.


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martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

Martin Gregorie wrote:

On Tue, 10 Sep 2013 08:22:23 -0700, Sean F (F2) wrote:

On Tuesday, September 10, 2013 9:52:26 AM UTC-4, son_of_flubber wrote:
http://www.youtube.com/watch?v=t2sozrof3HY



Youtube video of a paper sailplane thermally over an electric stove.

Wow. I sense a string might be involved but impressive nonetheless.

I think the circle was a bit irregular for a string to be involved, but
I'd guess it certainly didn't do that with the rather rough trim setup
shown in the video: plenty of up-trim, but what he did to get the tight
turn wasn't obvious. I'd think a few test gliders were in order before
trying it over the stove - either that or a set of oven gloves would be
needed.


He has flaps right up / left down so the turn is no surprise, and he
says that was the 87th take because most times it doesn't centre
properly.

On Tuesday, 10 September 2013 16:58:50 UTC-4, Gilbert Smith wrote:
He has flaps right up / left down so the turn is no surprise, and he
says that was the 87th take because most times it doesn't centre
properly.

Um... wouldn't those flap settings cause a RIGHT turn? At the very least, a right bank... or have the laws of aerodynamics changed since I did my licence exam?

Then again, perhaps the plane is actually doing right turns, and it's only my fading vision or fatigued brain that thinks it turning left?

Maybe he integrated a really good thermal assistant... :-P


"C-FFKQ (42)" wrote in message
...
On Tuesday, 10 September 2013 16:58:50 UTC-4, Gilbert Smith wrote:
He has flaps right up / left down so the turn is no surprise, and he
says that was the 87th take because most times it doesn't centre
properly.

Um... wouldn't those flap settings cause a RIGHT turn? At the very least,
a right bank... or have the laws of aerodynamics changed since I did my
licence exam?

Then again, perhaps the plane is actually doing right turns, and it's only
my fading vision or fatigued brain that thinks it turning left?

On Tue, 10 Sep 2013 21:58:50 +0100, Gilbert Smith wrote:

He has flaps right up / left down so the turn is no surprise, and he
says that was the 87th take because most times it doesn't centre
properly.

I saw that the elevons were bent to 90 degrees and did at one point think
I saw one down. However I thought that the last shot of its rear end
showed them both up, so thanks for correction.

I'm not surprised he took several shots, though 87 seems like a lot.

On a related topic, back in the 80s (IIRC), a few of the American indoor
fliers discovered they could win Indoor Hand Launched Glider contests
with very light microfilm covered models that they launched over a patch
of sunlight on the floor of the venue. I heard about this but never saw
plans or photos of the models: does anybody know if there are any films
or videos of these things flying? They'd fly a lot like that paper glider
though much slower.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

On Tuesday, September 10, 2013 5:53:03 PM UTC-6, Martin Gregorie wrote:
On Tue, 10 Sep 2013 21:58:50 +0100, Gilbert Smith wrote:



He has flaps right up / left down so the turn is no surprise, and he

says that was the 87th take because most times it doesn't centre

properly.



I saw that the elevons were bent to 90 degrees and did at one point think

I saw one down. However I thought that the last shot of its rear end

showed them both up, so thanks for correction.



I'm not surprised he took several shots, though 87 seems like a lot.



On a related topic, back in the 80s (IIRC), a few of the American indoor

fliers discovered they could win Indoor Hand Launched Glider contests

with very light microfilm covered models that they launched over a patch

of sunlight on the floor of the venue. I heard about this but never saw

plans or photos of the models: does anybody know if there are any films

or videos of these things flying? They'd fly a lot like that paper glider

though much slower.





--

martin@ | Martin Gregorie

gregorie. | Essex, UK

org |

No, but search for walkalong gliders on Youtube. Varietal constructions, paper and foam, tumbling and stable.

Frank Whiteley

On Tue, 10 Sep 2013 20:33:07 -0700, Frank Whiteley wrote:

On Tuesday, September 10, 2013 5:53:03 PM UTC-6, Martin Gregorie wrote:
On Tue, 10 Sep 2013 21:58:50 +0100, Gilbert Smith wrote:



He has flaps right up / left down so the turn is no surprise, and he

says that was the 87th take because most times it doesn't centre

properly.



I saw that the elevons were bent to 90 degrees and did at one point
think

I saw one down. However I thought that the last shot of its rear end

showed them both up, so thanks for correction.



I'm not surprised he took several shots, though 87 seems like a lot.



On a related topic, back in the 80s (IIRC), a few of the American
indoor

fliers discovered they could win Indoor Hand Launched Glider contests

with very light microfilm covered models that they launched over a
patch

of sunlight on the floor of the venue. I heard about this but never saw

plans or photos of the models: does anybody know if there are any films

or videos of these things flying? They'd fly a lot like that paper
glider

though much slower.





--

martin@ | Martin Gregorie

gregorie. | Essex, UK

org |

No, but search for walkalong gliders on Youtube. Varietal
constructions, paper and foam, tumbling and stable.

I know about walkalong glider, thanks. There was a Czech guy at last
month's Free Flight World Champs flying one at the open air prizegiving -
yes it was pretty calm but he still needed rather fast reactions to keep
it in front of a roughly 3ft x 4ft stretched fabric frame. The model
looked to be around 25cm spam with a minimal balsa structure covered with
5 or 10 micron aluminised mylar.

I'd have thought the sun-patch soaring IHLG would have to turn almost as
tight as that paper glider - sun patches on hall floors are often only a
metre or two square. I doubt that the Czech model would turn that tight
because it had a decent a/r (7+) and fairly long moment arm and nose.
That's why I was asking about photos and/pr plans.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

At 23:53 10 September 2013, Martin Gregorie wrote:
On Tue, 10 Sep 2013 21:58:50 +0100, Gilbert Smith wrote:

He has flaps right up / left down so the turn is no surprise, and he
says that was the 87th take because most times it doesn't centre
properly.

I saw that the elevons were bent to 90 degrees and did at one point think

I saw one down. However I thought that the last shot of its rear end
showed them both up, so thanks for correction.

I'm not surprised he took several shots, though 87 seems like a lot.

On a related topic, back in the 80s (IIRC), a few of the American indoor
fliers discovered they could win Indoor Hand Launched Glider contests
with very light microfilm covered models that they launched over a patch
of sunlight on the floor of the venue. I heard about this but never saw
plans or photos of the models: does anybody know if there are any films
or videos of these things flying? They'd fly a lot like that paper glider

though much slower.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

I built one of these models. The covering was made by floating a film of
dope on water and very gently lifting it off and covering a very light
balsa frame. They did work as you suggest.

On Wed, 11 Sep 2013 20:45:40 +0000, Don Johnstone wrote:

I built one of these models. The covering was made by floating a film of
dope on water and very gently lifting it off and covering a very light
balsa frame. They did work as you suggest.

Very cool! I've made and used microfilm in the past, though only for NZ
rules Easy-B and 35cm rubber models. If you have any dimensions or
sketches of your model I'd love to get a copy: the email address below at
the end of this post is valid if you'd care to send me any details.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |