[JoeF]

Nice, ARP !
===================================

[Frank Colver]

That's what i'm talkin about!

BTW - I own a dropstitch inflatable SUP like ARP shows. It is super rigid!

Frank

[JoeF]

Boeing: Lightest. Metal. Ever


Compressed Wing. kPower, Inc.

Consider a Compressed wing; uncompress: Presto-Change-OH! .... ready to fly.
Method: Given to kPower, Inc. by Joe Faust for easy licensing to commercial efforts, October 12, 2015. Simply ask kPower, Inc., for private non-commercial experimentation of the method for hang glider or kite or powered aircraft.

The wing is compressed by various means. Releasing the constraining compression and the structure expands in ambient atmospheric or hydrospheric media to be useful wing in various applications including AWES, kite systems, energy kites, powered aircraft, recreational structures, etc.

The method inverts the inflatable concept. That is, force deflation of a structure; release the compression system to obtain the structure wanted. The method for wing is seeded by compressing open-cell foam by a compression machine; take off the compression effort and the foam expands to full form for, say, high jump landing pit material.

One method of compressing the HG is to use atmospheric pressure by use of evacuation bag. Stay green for the energy: pilot power, wind power, kite energy, stored kite energy, etc.

[KaiMartin]

The method inverts the inflatable concept. That is, force deflation of a structure; release the compression system to obtain the structure wanted. The method for wing is seeded by compressing open-cell foam by a compression machine; take off the compression effort and the foam expands to full form for, say, high jump landing pit material.

There is a hard limit to the amount of anti-pressure, though. It must stay well below 1 bar. Else the force would create a vacuum inside the collapsed volume and the wing will refuse to stay folded.

The other problem with fancy super materials is production and by extension price. They usually require elaborate procedures which are technologically limited to small scale batches. There is a reason why you pay triple digit amounts for samples half the size of a fist, even though ingredients even for the most economical of these materials.

E.g. Super light weight aerogel is produced by replacing fluids inside the volume by diffusion. Diffusion is pretty slow for starters. But it gets worse. A typical sequence would be water → methanol → CO2→air. For the final step, pressure and temperature are engineered to walk around the critical point to make the CO2 go from fluid to gaseous without actual evaporation. So the entire sample needs to go into a pressurized cryogenic chamber for days. Unless there are serious technological breakthroughs applications will be very limited.

---<)kaimartin(>---

[KaiMartin]

BTW - I own a dropstitch inflatable SUP like ARP shows. It is super rigid!

Just how rigid is the board when fully inflated?

A little experiment might show:
1) Support the board at the ends only.
2) Gradually put weight in the middle.
3) Check when the board starts to buckle.

---<)kaimartin(>---

[dhmartens]

This carbon fabric is as light as air.
Charles Garner
Engineer at JPL (NASA's Jet Propulsion Laboratory)
La Canada Flintridge, CaliforniaDefense & Space
0.5 um - thick mylar from Dupont

[JoeF]

Nice carbon fabric!
==============================

Modeling target HG:
Tease:

[Frank Colver]

These guys did for jet skis what we want to do for hang gliding. It is interesting that they had the same purpose in designing what they did and they succeeded in their goals.

http://contest.techbriefs.com/2015/entr ... ducts/5813

Frank C.

[JoeF]

Our design movement is going to succeed also!

[JoeF]

Consider for some designs:
Struts that taper from the center of their length to their ends;
and consider telescoping tubes for each half of such double-tapered strut.
http://dragonplate.com/ecart/product.asp?pID=5724&cID=198