free-lance designer, in business since 1975

"We didn't all use them, but I was one who did. When I had a release failure on tow behind a Moyes' tug, I went for it and it worked flawlessly!"

Jim Zeiset
Jan, 1997 (Green Team) at the Hay Tow meet, Australia

"NOTHING works better than the Linknife."
Jeff Sinason
Former Region 6 Director

The light weight, low cost, sure fire, place anywhere,
Tow Release for Hang Gliders and Paragliders

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THE LINKNIFE cuts the weaklink. It's independent of any tow forces and works the same with too much or too little towline tension. Notice how the O-ring slides down bringing the blades to the string. Use for main or backup release for all types of hang glider and paraglider towing.

COSTS:

Linknife — $20 each + shipping.
Club/dealer discounts available.

Bridles (aero or static), including Linknife,
rapid links and setup instructions — $50 each

ORDERING:

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US orders (Linknife single-order only)

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Other than US orders (Linknife only) drop me an email with your specifics for quantity and shipping method desired.

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Quantity orders of 10 or more Linknifes @ $15.00 each (add $10 shipping/insurance to US addresses for each 10 ordered)

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Bridles are made from red 900-pound heat set and stretched braided dacron with woven and hand-sewn loops in the ends. Kits include: Linknife release with extra O-ring, main 1:1 or 2:1 bridle, waist or shoulder bridle and connecting rapid links. Kits do not include the static tow waist bridle release mechanism (such as sailboat shackle) or release pull string as there are too many optional ways of setting this up. Custom bridles are available; please call or write with your specifications.

Static Line Tow Bridle (Hewett Center of Mass 2:1), or V-line (1:1 keel-to-pilot) Aerotow Bridle @ $50 each (plus $5.00 for ship/pkg) to US addresses. (Please add a note specifying which bridle you are ordering.)

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or send check to:
Birren Design Company
502 Shadywood Lane
Elk Grove, Illinois 60007
P: 847/640-0171
F: 847/640-0208
E: Email

DISCLAIMER: As with all aviation endeavors, your choice and use of equipment is totally up to you. It is assumed you are an experienced HG or PG tow pilot who is intimately familiar with the style of towing you will be doing. As such, YOU ASSUME ALL RISK AND LIABILITY in the use of the Linknife, as well as all other parts, functions and personnel involved in the towing and flight operations. If you do not have experience in towing, please contact an instructor for expert training. Trying to learn on your own can, and probably will, result in your injury and even death. Many pilots have paid the ultimate price so we may now tow as safely as never before possible. Please learn from their lessons.

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