Search found 233 matches

by KaiMartin
Tue, Apr 06 2021, 06:35:44 pm
Forum: Hang Gliding
Topic: Jean-Michel Bernasconi and Pacific Windcraft
Replies: 8
Views: 1262

Re: Jean-Michel Bernasconi and Pacific Windcraft

Everard wrote:With much help from John LaTorre, I have created the following page in Hang Gliding History.
I like the idea of the stiff cloth on the top and soft cloth on the bottom.
Did the design work as intended?
Has this been adopted to other models?

---<kaimartin>---
by KaiMartin
Sat, Feb 27 2021, 02:10:58 pm
Forum: Hang Gliding
Topic: Changes Coming to the Oz Report
Replies: 35
Views: 6101

Re: Changes Coming to the Oz Report

Feel free to respond or comment. I used to be a fairly active facebook user. It started about the time when social media went viral in the computerphile segment of the population. I got my account in 2008, had a little chit-chat with friends, posted a few photos played farmville when it was fresh a...
by KaiMartin
Sat, Feb 27 2021, 01:20:40 pm
Forum: Off Topic
Topic: Epic Cycling on Ice
Replies: 1
Views: 1693

Re: Epic Cycling on Ice

Alternatively, you could buy studded tires, slap them on your wheels and off you go. The video would be less epic, though. Studded wheels look almost like regulars. These tires work well on ice but also get you going on dry streets and through moderate snow. Studded tires come in different grades wi...
by KaiMartin
Fri, Sep 18 2020, 10:04:14 am
Forum: Hang Gliding
Topic: Fat Wings
Replies: 10
Views: 1408

Dutch roll = wing-over ?

So I was watching airliner commanders explaining their reaction to the Dutch roll. It made me wonder, whether hang gliders also show this kind of behavior. After all, our wings are strongly swept back , too. Could it be, that the movement we call "wing over" is our version of the Dutch rol...
by KaiMartin
Tue, Sep 15 2020, 08:25:59 pm
Forum: Hang Gliding
Topic: Fat Wings
Replies: 10
Views: 1408

One of the problems with flying wings for human cargo, is the further away from the fore to aft center line (roll axis) that the passenger seating is, the more unpleasant it is for the passenger during banking turns, rolls and/or turbulence. Ok for slow slow turns and smooth air, or carry plenty of...
by KaiMartin
Fri, Sep 11 2020, 01:23:51 pm
Forum: Hang Gliding
Topic: Fat Wings
Replies: 10
Views: 1408

They are windows. It is a computer generated image, anyway. Here is an image of the actual scale model: https://d1rkab7tlqy5f1.cloudfront.net/Websections/Stories/De%20eerste%20testvlucht%20van%20de%20Flying-V/IMG_1745.JPG The layout is a lot more unconventional than the view of the cgi suggests. It...
by KaiMartin
Sun, Oct 28 2018, 05:18:02 pm
Forum: Hang Gliding
Topic: Stall to Infinity
Replies: 17
Views: 1171

It's like stalling a HG at top of loop and tumbling out for fun.. Pointless&acirc;&euro;&brvbar; A tumble in PG is not quite comparable to a tumble in HG. The analogue to a HG tumble would be a massive collapse with the pilot totally loosing control and falling into the canopy. By contr...
by KaiMartin
Sun, Oct 07 2018, 10:05:58 pm
Forum: Hang Gliding
Topic: ESA Western Workshop 2018
Replies: 5
Views: 382

Here's more video of a manned flight of the Prandtl Wing Well, this is a low tow, not a free flight. Also, the video was uploaded in November 2016. Apparently, there is no video on youtube of the Prandtl-4 performing in free flight. This makes me curious. Was there some kind of problem? ---<kaimart...
by KaiMartin
Sun, Oct 07 2018, 07:55:32 pm
Forum: Hang Gliding
Topic: Comparing the ATOS VR to the Aeros and Moyes gliders
Replies: 6
Views: 554

L/D at high air speed

I sometimes wonder why these much higher aspect ratio rigid wings do not spectacularly out glide topless flex wings. Apparently over 100kph things change more? My reasoning: The pilot in his harness, tubes and the wires are almost the same between top gun flexis and rigids. Energy loss due to drag ...
by KaiMartin
Sun, Jun 03 2018, 03:43:55 pm
Forum: Hang Gliding
Topic: Making a better nose release line for platform towing
Replies: 10
Views: 779

Re: Making a better nose release line for platform towing

My thoughts: I'd go for the maximum value you intend to configure your weak link times two. Yes, this line normally should bear only a fraction of the total tension. But if things go south in the early stages this connection failing first will likely make matters worse. How about a bungee cord insid...