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If you are thinking of launching anything, MOORED BALLOONS, KITES, AMATEUR ROCKETS AND UNMANNED FREE BALLOONS, into the sky over 500 feet above the surface of the earth or close to an airport, you should be aware of the Federal regulations regarding this type of activity. Below is the link to the Electronic Code of Federal regulations:

Code 101 Title 14: Aeronautics and Space.

If you decide to proceed anyway, you can apply for a waiver. We supported Richard Crawford of SBR Kites when he was attempting the world single string altitude record. See the picture of his kite on our home page.


Scroll down to;
Kite lines for high altitude attempts
Richard spent a year or so trying to get a waiver. While it is not impossible there is a process you must follow if you wish to be in compliance.
The model rocket guys do this all of the time. Here is a link to their home page where you can find some very good information.


Scroll down to FAQ #

10.7 OK. I want to fly some high power rockets. How do I get an FAA waiver?

Good luck

Best link on how to tie almost any kind of knot... CLICK HERE


What are the best knots for retaining cord strength?

There are hundreds of knots that you can tie to secure a cord. Here are 2 of the easier knots that still retain about 90% of cord strength. If you want to get closer to maintaining 100% of cord strength we recommend sleeving or using a finger trap termination. see other FAQs

Braided cord? Palomar knot.

Stranded cord? Bristol knot.



Kevlar® fiber and filament come in a variety of types, each with its own unique set of properties and performance characteristics for different protection needs.

Kevlar® AP

A next-generation fiber that offers advanced performance, value, and increased design flexibility in many applications.

Kevlar® 29 (K29)

The original family of product types of Kevlar®, having similar tensile properties with many deniers and finishes. These yarns are used in ballistic applications, ropes and cables, protective apparel such as cut-resistant gloves, in life protection uses such as helmets, vehicular armoring, and plates, and as rubber reinforcement in tires and automotive hoses.

Kevlar® 49 (K49)

High-modulus type used primarily in fiber optic cable, textile processing, plastic reinforcement, ropes, cables, and composites for marine sporting goods and aerospace applications.

Kevlar® 100

Producer-colored Kevlar® yarns, used in ropes and cables, tapes and strappings, gloves and other protective apparel, and sporting goods.

Kevlar® 119

Higher-elongation, flexible-fatigue–resistant yarn types found in mechanical rubber goods, such as tires, automotive belts, and hoses.

Kevlar® 129

Lightweight, high-performance, and high-tenacity type of yarns used in motorcycle racing gear, life protection accessories, ropes and cables, and high-pressure hoses used in the oil and gas industry.

Kevlar® KM2

Woven into fabric meeting performance requirements for helmets and vests for military and high-performing UDs for spall liners.

Kevlar® KM2 Plus

High tenacity, high toughness, and finer denier fiber used in vests and helmet for both military and law enforcement officers.

Kevlar® AP

Kevlar® AP for Advanced Performance helps dramatically improve cost-effectiveness and design flexibility to manufacturers helping  them build leaner, more robust consumer and industrial products


Whenever a coating, extrudate or film is used, it should not be UV-transparent. Rather, it should have the proper pigmentation to absorb in the 300-nm to 450-nm range.

Kevlar is intrinsically self-screening. External fibers form a protective barrier, which shields interior fibers in a filament bundle or fabric. UV stability increases with size - the denier of a yarn, the thickness of the fabric or the diameter of a rope.

Extra UV protection can be provided by encapsulation: By over braiding with other fibers or by applying an extruded jacket over ropes and cables.




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