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"Just got back from the USUSA meet. Boy, that was a blast. Met a guy from your area who demonstrated your tow release - I'm impressed! Please send me a couple."

Ron Kenney
Region 6 Instructor

 

 

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

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PAYOUT WINCH SETUP
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Place the Linknife as MAIN release between bridle and towline (this position is also known as the ARS, or Apex Release Site). For a BACKUP you can also place the Linknife directly on the bridle within easy reach.Payout winch release placement (illustration)
The dotted lines in the drawing to the right show an alternate idea for a YAW LIMITER. This has not been tried yet as I have no direct experience with payout/platform launching, though I have crewed for quite a few pilots with this style of launching.

Alternately, a PITCH LIMITER can be added... a line from the Linknife to the nose of the glider. Also see the Linknife Operation (takes 1 minute to load)

A 4-strand weaklink will set up easily between the towline and the bridle. My personal favorite for a weaklink is 130-pound test braided dacron kite string, tied with a grapevine knot (a large pilot may want to use 150# line). Starting with 18-20 inches of string, this gives me a large enough loop to work while wearing gloves. Insert the first loop through the towline, then pass the 2 end loops through the Linknife above the O-ring as shown below. Place both loop ends in the rapid link. Don't forget to close the rapid link.

 

Linknife Tow Release photo

 

COSTS:

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

Bridles (aero or static), include Linknife,
rapid links and setup instructions

Convenient Ordering:

Note: Using PayPal is very simple. You do NOT need to be a member of PayPal to make a purchase. You may use a credit card like any other system. If your order is to be shipped outside the US or prefer to pay by check, please contact me.

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LINKNIFE - USA

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US orders (1-9) @ $20.00 each + $1.50 shipping.

paypal button

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Quantity orders (10+) @ $15.00 each + $5.00 shipping per lot of 10.
Use PayPal's "Send Money" option or drop me a note and we'll work it out.
THANKS.
PayPal button

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LINKNIFE - CANADA
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US orders (1-9) @ $20.00 each + $7.00 shipping.

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Other orders – please write with your specifics for quantity
and shipping method. Use PayPal's "Send Money" feature for
the total amount. (Recently sent 10 to Turkey.)

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BRIDLES – Static Line Towing and Aerotowing
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All bridles are made from red 900-pound heat set and stretched braided dacron with woven and hand-sewn loops in the ends. Measurements are what I've found to work; if you have a different need, gimme a call.

Static Line Tow Bridle - aka: 2:1 Hewett Center of Mass Bridle
SEE BRIDLE PAGE or STATIC LINE PAGE

For foot launch towing with a static or payout winch. Kit contents include:
(A) Main line is 22' loop-to-loop.
(B) Waist line is 3' which allows tying an overhand loop knot to keep the shackle, self-locking carabiner or whatever you choose, from sliding side-to-side.
(C) Keel line is a 6' length of plain bridle material without finished ends, for you to tie however works best for your glider.
(D) Four (4) 1/4" rapid links
(E) Linknife Release with extra O-ring.

COST: $70.00 + $5.00 mailing to US addresses.

Kit does 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.

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Aerotow Bridle - 1:1 V-line
SEE AEROTOW PAGE

For aerotowing via foot or dolly launch. Kit contents include:
(A) Main V-line is about 8' loop-to-loop.
(B) Chest bridle is 3' long and attaches to one end loop of the main bridle with a larkshead knot or, if the release is placed at the keel, a secondary/backup release can be placed here.
(C) Keel line is a 6' length of plain bridle material without finished ends, for you to tie however works best for your glider.
(D) Two (2) 1/4" rapid links for at the bridle apex and attaching the main bridle at the keel,
(E) Two (2) 1/8" rapid links for attaching the chest bridle to the harness shoulder loops
(F) Linknife Release with extra O-ring.

COST: $55.00 + $5.00 mailing to US addresses.

Kit does not include the release pull string as there are too many optional ways of setting this up. Custom bridles are available; please call or write and let's see what can be done.

Use PayPal's "Send Money" option for easiest payment.

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or send check to:
Peter Birren
1657 W Farwell Ave, #3C
Chicago IL 60626
P: 773-654-3950
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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Page last update: July 8, 2015
This entire site and the Linknife™ Towing Release © 2000-2008 Birren Design Company