payout

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Re: payout

Postby SamKellner » Sun Nov 13, 2016 6:21 am

Bill,

That sounds like some good ideas.
Southwest Texas Hang Gliders
US Hawks Hang Gliding Assn.
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Junk Yard Parts?

Postby Bob Kuczewski » Sat Dec 09, 2017 3:24 pm

I just had a long chat with one of my hang gliding friends, and he described an idea he had for a payout system using a MacPherson strut assembly with the hub, wheel, and brake already assembled and ready to bolt to a truck bed. He also described using a windshield wiper assembly as the "level winder" for retrieval.

Has anyone seen those kinds of components used in towing?
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Re: payout

Postby Bill Cummings » Sat Dec 09, 2017 9:54 pm

No but I would sure like to see a YouTube video with one.
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Re: payout

Postby Bill Cummings » Fri Jan 11, 2019 4:11 pm

https://www.youtube.com/watch?v=ilD-0Mw_9qg

ALMOST LOCKOUT (Pilot Error.)
Without a doubt there is a left crosswind. (Wind sock at 0:09 showing 35 to 45 degrees.)
On the front truck rack the ribbon is showing left crosswind. (Visible to the right of the carabiner.)
After the glider leaves the truck the keel no longer lines up with the tow road. (Left Crosswind.)
The pilot tries to maintain position behind the truck and over the tow road.
The pilot should have allowed the glider to drift to the right side of the tow road.
The pilot needs to be down wind of the truck not behind it due to the crosswind.
All the crabbing that the pilot did should have always been to the right side/down wind of the road.
The pilot crabs too much and has the glider on the left side/up wind side of the road. (Wrong side.)
As the glider gains altitude above the field the wind speed will be greater.
In this greater wind speed and due to elasticity in the tow line and inertia involved to speed up the payout drum tension will increase momentarily.
This (extra momentary tension.) will narrow the, Sweet Spot, where the pilot should be.
The Sweet Spot will be found down wind of the tow vehicle and not over the road. (And certainly not left/up wind of the tow road.)
With a low tension climb the Sweet Spot will be broad left to right.
With a high tension climb the Sweet Spot will be narrow.
While holding the glider behind the tow truck while towing in a crosswind any increase in line tension will move the lockout boundary to the glider. In this case toward the left wing tip. The glider will then lockout to the left.
On final, note the keel is still aiming left of the corn rows still proving a left crosswind.
Flip-Flops are not the best option for a foot landing.
Tow line recovery parachutes can blossom if tension is lost and the pilot can overtake the chute and get tangled up with it.
https://www.youtube.com/watch?v=ilD-0Mw_9qg
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