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Re: The 5 ft-packed-HG Movement

Postby Bob Kuczewski » Thu Oct 20, 2022 8:27 pm

JoeF wrote:Fun!


Thanks Joe! Fun is something we can alway use.    :salute:
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Thu Oct 27, 2022 11:18 am

[3pmendsediting]
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Thu Oct 27, 2022 12:16 pm

One-Meter Hang Glider Club
When a HG packs pleasantly to a maximum length of one meter, then that HG joins the One-Meter Hang Glider Club. And the builder, designer, owner, seller, buyer, owner, or pilot of such a packed HG are members too! Thus, fellow members might be a HG or a HG pilot or a HG builder or a HG designer or a HG seller or a HG buyer/owner.

:arrow: Announce your membership in the One-Meter Club at your convenience. The One-Meter Hang Glider Club has no known members yet; if this statement needs correction, please post the correction in this discussion thread and/or elsewhere. Tell us about it all; give some evidence for the qualified membership. Members are invited from any corner of Earth or beyond. OMHGC is an international club; members may be from any nation, state, city, village, or home in the world.
One-Meter Hang Glider Club wrote:Rule: the HG involved must have been glided three safe successful times with a human pilot being flown; when the club develops, other bylaws may come to play.
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Thu Oct 27, 2022 4:52 pm

One-Meter Hang Glider Club wrote:

Advanced rule:
a) The HG involved must have been glided three safe successful times with an onboard human pilot being in control of the flights.
b) A photo of at least one flight is to be published.
c) A photo with a meter- or yard stick next to the packed hang glider is to be shown. Pack could be of more than one subpack.
d) A statement of the weight of the involved hang glider is to accompany the membership announcement.



... can't wait to become a member of the OMHGC :!:
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Sat Oct 29, 2022 11:23 am

Not-fully-baked stream of consciousness while wrestling with rolled spars:

Practice: Build a full HG using no beam part longer than one meter. Maybe practice first with aluminum. Then after flight and tweaks, replace the aluminum with fiberglass beam segments. Then after some lessons, invest $$ in CFRP beam parts. Disallowing in the practice any beam part longer than one meter will assure that the HG has the one-meter qualifying deal. Any particular design of HG that stands a chance of joining the One-Meter-Packed Hang Glider Club will need to watch that one-meter deal.

An area of workaround regards inflatables.

Another workaround involves "rolled spars" where a coil of material is in tote no longer than one-meter in tote length; but that coil may uncoil to become a flat of say 2 meters by 1 meter. Then roll that flat up to be a two-meter long spar of some resultant cross section diameter; such rolled up spars were probably practiced in first-grade school craft section when paper was rolled up and taped or glued to make a tubular stick; either roll short or long as chosen. Getting the rolled spar to stay at the designed diameter will need locks, stops, hoops, cases, etc. The rolling process may need start-stops, segmented cores, or other tricks. The resultant beam would then be 2 meters long, if desired. The buckling performance will not be as good as if the same mass of material was integrated into a non-rolled tube of 2 m. But some choice of diameter and rolled material may serve some HG.

Consider the surface of the flat material to be rolled. Maybe use two materials at once; maybe bind cling plastic to the surface of a rugged Mylar film to get friction; Mylar alone has low friction with itself; but in a rolled spar, the friction could be a good thing. Making the rolled spar "tight" would be best for strenth; looseness invites buckling. How to get the roll tight to the diameter wanted? Perhaps begin the roll with a firm stop tactic (just how to do that?) and then begin firm rolling the start cylinder just made. Perhaps have a flattenable coilable tube that is already 2 m long when uncoiled and popped open; let that be the start core of the rolled macro spar. Then roll the material firmly on the core tube. Then at the end of rolling process there will a challenge to lock the hoop per design; helper short hoops might be used. Or a case or full sleeve of coilable material might slip over the rolled base; but that might mean a precision and low-friction fit that could be difficult to accomplish. Perhaps the start is to not "stopped" but have the small be a bit tighter than final set; then once the rolling of the macro spar is done, all things would be smaller in diameter than ultimate final diameter; then with help from helper hoops, don the exterior case, perhaps in segments; then rattle the roll and the rolled parts might settle to desired tightness, but might not if cling was laminated. Research, try, learn. This matter of rolled spars is not mastered yet by me; maybe someone out there has mastered rolled spars where unrolling is anticipated for short One-Meter Pack for tote.

I tried a rolled spar with weak paper at 4 m length; the feed flat had a width of less than 1 m. The coil of say 1 m paper was uncoiled. The broad 1 m by 4 m flat was on the ground. Then I rolled the paper to a 3 cm diameter cross section tube by 4 m length. The process faced many newbie challenges.

Note how rolling up a flat square rolling from one corner toward the other corner results in a double-tapered beam with the most anti-buckle format in the center of the beam where needed for compression beams. However, a judicious hexagon flat can roll up to a beam that has designed sturdiness at the beam's end. A square rolled from diagonal to diagonal end up with perhaps unsatisfying shape and thinness.
DoublyTaperedStrengthRolledSpar.jpg
DoublyTaperedStrengthRolledSpar.jpg (27.71 KiB) Viewed 947 times


If a temporary helper core is used in rolling is short, consider bonding a string to the inside of the helper core; use that string to pull the core out of the rolled macro spar.

Or consider an inflated tube to be core for the harder material to be rolled up. Have the inflated tube have hard ends to allow higher air pressure. A small air pump could serve small-diameter inflated core. With a Dyneema or Kevlar case over the wrapped hard sheet that was rolled and with the high psi inner bladder, the combination might be a very respectable spar.

Maybe have only a flattened tube of coilable polycarbonate and a high pressurable inner bladder with capping at ends; inflate to 30 psi and what have we?

Having raw sheet that does not wrinkle readily could prove hugely important.
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Ready 1-meter CFRP tubes along with couplers may win over other machinations. :) But practice with bamboo, wood, aluminum, fiberglass ... before investing in the CFRP deal. Have a full working flyable HG in Al before going CF.
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Tease: https://windowcleaner.com/xero-carbon-f ... d-pole-2-0
Collapsed lengths of the modular scopic poles are under 5 ft. These are not for the One-Meter Packed HGs, but might tease the "under-5-ft" HG target.

==
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Protect ends of CF tubes.
Shown segments are longer than 5 ft.
======================
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Sat Oct 29, 2022 3:42 pm

FlyingSaucerHangGlider.jpg
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BEF007a seems to live in the shown hang glider.
Now that might be a build project sooner than later to check it out for possible One-Meter-Packed Hang Glider Club membership. The ring at perimeter might be in segments or might be coilable tote format. Multiple tubes might combine to form the final frame; that is, maybe multiple coilable tubes. This might also be a candidate for inflated tube splinted to a CF or glass ring married to the tube.
The history of the shown hang glider seems yet lost or hard to find. Anyone?

Notice the reflex region for pitch stability.
Notice the apparent tail skid (white vertical ring, it seems)
Image
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Sat Oct 29, 2022 3:58 pm

Note has this lead regarding Stephan Nitsch ::
https://web.archive.org/web/20140220021 ... fly.de.vu/
And click here: HERE


:arrow: :arrow:
giro_e_nitsch.pdf
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=====================
The shown is potentially a hang glider, but the logistics of untowed footlaunching are challenging. Kited launch by some powered towing device or vehicle seems more probable. But the generic type of hang glider of autogyro hang glider deserves a BEF (basic experimental frame for hang gliders) for the 5-ft or less movement. Segment the rotors and other frame parts to win membership in the topic at hand.
There are considerable SAFETY CHALLENGES regarding gyro hang gliders; facing such challenges may discourage participation in the realm.

BEF20 Autogyro Hang Gliders
=============
Teasers:

and
https://en.wikipedia.org/wiki/Rotor_kite
Tony Prentice found the following video:

https://en.wikipedia.org/wiki/Bensen_B-8
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Sun Oct 30, 2022 2:35 pm

Challenge of side wing using four of one-meter spar segments is wrestled:

One approach using outrigging and lines that double-duty for airfoil forming:
Note: Consider both catilevering or Kp-Qp rigging the complex outrigged spar.
Note: Rib/battens may root to rings.
Note: The whole affair may be a foundation for wing morphing or experimental wing-shape setting.
Note: See how I am off-centering the spar segments so that handling flight-load compression is emphasized; the outrigged lines are further from the spar segments.
NOTREADYYET001.jpg
NOTREADYYET001.jpg (50.48 KiB) Viewed 925 times


Some teasers somewhat related:
http://projects.eng.uci.edu/projects/20 ... grity-wing
http://kennethsnelson.net/articles/TheA ... rticle.pdf
https://en.wikipedia.org/wiki/Bracing_(aeronautics)
For other work:
Deployable truss with orthogonally-hinged primary chords
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Re: The 5 ft-packed-HG Movement

Postby Chris McKeon » Sun Oct 30, 2022 3:28 pm

{SAME PROBLEM DIFFERENT THERMAL, RABBITS?}

I have shown interest. Because the Day is coming when I will once again be Flying. Yes I will be Flying XC routes again. Well as usual when Your Route Does not coincide with say a Cloud Cloud Street. So i will be more inclined to Fly over the Terrain where I might indeed do that dreaded Foul Four Letter Word, Thayt Word is {SINK} But I will be more willing roo venture on, crossing "NO MANS LAND". If I were to indeed Sink-Out and need to land where I was say 5 Miles from a road. If I knew that I could Break-Down My Predator, Have the Glider become more manageable so that after calling My Driver. I could begin packing My Glider Myself to the closest road.

OK Obviously I am not the only one dealing with, or trying to deal with this issue. I mean I see that You Guys are working on How One can get Their Gliders moved efficiently.

By Hook or by Crook. I have some how always been able to having gotten so low. But even though I could see individual Birds perched upon Limbs on a Given Tree. I always somehow would manage to get back up so that I could continue on My way. But I see it this way; Just how many times will I be able to scratch My way back up? I mean I have been so low many times. But when I was low My Predator would deliver the Performance that it is so known for. Yes when I have
been Low. i always knew that if only did a fair Job of working a Termal. I would get back up. But how many times will I: Speaking regarding Flying XC. How many times will be able to Pull a Rabbit out of a Hat?
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Re: The 5 ft-packed-HG Movement

Postby JoeF » Sun Oct 30, 2022 8:59 pm

Basic Experimental Frame (BEF) for Hang Gliders may hold the following member: BEF020 may live in Split Wings,
If an experiment has cable-leading edge, then extra care for pitch challenges may be wise.

The first symbol for BEF020 is:
BEF020.jpg
BEF020.jpg (21.26 KiB) Viewed 912 times


http://www.energykitesystems.net/hgh/pr ... ridge.html
https://www.delta-club-82.com/bible/f21 ... entice.htm
https://en.wikipedia.org/wiki/Platz_glider
Image

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BEF021
https://www.ushawks.org/forum/viewtopic.php?f=22&t=1003
BEF021.jpg
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