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 |