Paragliding Payout Winch
TowTechniks T2

Operating Manual

TowTechniks T2 Paragliding Payout Winch
June 18, 2020
Version 2.2

1. Introduction

The TowTechniks T2 is a payout winch for solo or tandem towing of paragliders. It can be easily mounted to a standard car tow hitch and operated via a handy remote control by the winch operator seated in the back of the tow vehicle.

Fig. 1 Overview of the TowTechniks T2 mounted on a tow hitch
Fig. 1 Overview of the TowTechniks T2 mounted on a tow hitch

2. Overview

2.1 Manufacturer details

Manufacturer
NameTowTechniks
ContactGerard Backus
AddressMax-Planck-Straße 17, 52511 Geilenkirchen, Germany
E-mailinfo@towtechniks.com

2.2 Technical specifications

Payout winch
DimensionsLength: 540 mm, Width: 360 mm, Height: 1283.5 mm
Weight56 kg
Motor output1.6 kW
Current drawmax. 134 A
Tow line
Line typeUHMWPE Dyneema
Maximum length1500 m
Diameter3 mm
Weight0.5 kg / 100 m
Breaking strength900 kg
Fig. 2 Technical drawings and dimensions of the T2
Fig. 2 Technical drawings and dimensions of the T2

2.3 Materials list

Payout winch
Anodised aluminium frame
Cast iron brake drum
Stainless steel ball bearings
Stainless steel cutter blade and release mechanism
Motors
2 × 0.8 kW / 12 V DC motors
Ribbed v-belt drive
Power cable, control electronics
Tow line
UHMWPE Dyneema, 3.0 mm diameter
Remote control
Display, controls and electronics in plastic housing, not waterproof

3. Setting up the T2

3.1 Mounting to the tow hitch

To mount the TowTechniks T2, place the winch onto the tow hitch with the mounting lever in the vertical position. Once the winch is correctly positioned, rotate the mounting lever to the horizontal position. Pull the safety pin slightly to release the lever, then lock it back in place with the pin.

Fig. 3 Mounting lever in vertical position
Fig. 3 Mounting lever in vertical position
Fig. 4 Mounting lever in horizontal, locked position
Fig. 4 Mounting lever in horizontal, locked position

3.2 Securing the rotating tower

To relieve the load on the rotating tower, secure it with ratchet straps. Route the straps through the rear struts of the tower and through the roof rails of the vehicle, then tension them lightly. Secure the loose ends of the straps against flapping.

Fig. 5 Tower secured with ratchet straps
Fig. 5 Tower secured with ratchet straps
Fig. 6 Strap attachment at the tower strut
Fig. 6 Strap attachment at the tower strut

3.3 Connecting to the vehicle battery

The TowTechniks T2 must be connected directly to the car battery via the supplied cables. Route the cables securely from the rear of the vehicle to the battery — use the roof rails for routing, then along the A-pillar into the engine bay.

The red cable must be connected to the positive terminal and the blue cable to the negative terminal. Always verify correct polarity before switching on!
Fig. 7 TowTechniks T2 connection cables
Fig. 7 TowTechniks T2 connection cables
Fig. 8 Cables correctly connected to the car battery
Fig. 8 Cables correctly connected to the car battery

3.4 Main switch

The main switch is located on the rear of the winch and has two positions: “ON” and “OFF”.

Fig. 9 Main switch OFF
Fig. 9 Main switch “OFF”
Fig. 10 Main switch ON
Fig. 10 Main switch “ON”

3.5 Cocking the line cutter

The line cutter is located inside the tower below the guide pulleys. It can be triggered mechanically or electrically. Use the cocking bracket to load it and check that it clicks securely into place.

Due to the risk of injury, the line must only be fed through the cutter using a suitable tool (e.g. a wire loop) — never by hand.
Fig. 11 Line cutter in relaxed (uncocked) state
Fig. 11 Line cutter — relaxed (uncocked)
Fig. 12 Relaxed cutter state in detail
Fig. 12 Relaxed cutter state in detail
Fig. 13 Cocking the cutter with the cocking bracket
Fig. 13 Cocking the cutter with the cocking bracket
Fig. 14 Cutter in cocked and locked state
Fig. 14 Cutter cocked and locked in detail

3.6 The tow rope assembly

The tow rope assembly consists of:

  • Line parachute
  • Weak link (1,500 N for solo and 2,000 N for tandem tows)
  • Separation rope (8–10 m)

The complete tow rope assembly is made of low-stretch material and has a total length of approx. 25 m.

Tow line Line parachute Weak link Separation rope approx. 25 m approx. 10 m
Fig. 13 Schematic diagram of the tow rope assembly

3.6.1 Tow line

The TowTechniks T2 uses UHMWPE DYNEEMA tow line, approved for paraglider towing. Breaking strength is 9,000 N. The maximum line length that fits on the drum is 1500 m and must not be exceeded. Dyneema line is repaired by splicing (see Ch. 5.1). The tow line connects to the tow rope assembly.

3.6.2 Line parachute

The line parachute is matched to the T2 by the manufacturer and is part of the winch type approval. It must not be replaced by a different line parachute or modified without a DHV change application.

3.6.3 Kite drogue

The TowTechniks T2 additionally uses a kite drogue which, after release, helps to reel in the line in an approximately twist-free and controlled manner, thereby reducing wear on the tow line.

3.6.4 Weak link

The TowTechniks T2 uses a weak link with a rated breaking load of 150 kg for solo tows and 200 kg for tandem tows. The weak link must be DHV-approved and forms part of the type approval. Unapproved weak links must not be used.

  • Weak links must be replaced per manufacturer instructions, typically after 200 tow starts.
  • To prevent unintentional re-use, the worn weak link should be destroyed and disposed of.
  • Before each tow session, check the weak link by pushing the two shackles together. If the shackle pin holes are worn, replace the weak link insert.

3.6.5 Separation rope

When using a low-stretch separation rope (e.g. Dyneema), no protective sleeve is required. The length of this rope is designed to prevent the pilot from flying into the line parachute when tow tension drops suddenly. The separation rope length is 8–10 metres.

Fig. 15 Overview of tow rope assembly components
Fig. 15 Tow rope assembly components
Fig. 16 Weak link with protective cover
Fig. 16 Weak link with protective cover
Fig. 17 Weak link in sheet metal cage, open side towards pilot
Fig. 17 Weak link in cage, open side towards pilot

3.7 Remote control description

The remote control features the following displays and controls:

  • Red trigger button for electric line release on top of housing
  • Display shows current pull force in kg
  • “S” indicates solo mode (max. pull force 100 kg)
  • “T” indicates tandem mode (max. pull force 130 kg)
  • Lower display area is reserved for future extensions
  • Left LED shows drum rotation
  • Right LED: red = maximum pull reached; green = zero pull
  • White button: increase pull force by approx. 8 kg per press
  • Black button: decrease pull force by approx. 8 kg; hold for approx. 5 seconds = force to zero
  • Hold left button continuously: reel in line

Solo or tandem mode is selected with a toggle switch above the brake drum. Lever up = tandem tow; lever down = solo tow.

Fig. 19 Switch position for tandem tow
Fig. 19 Switch position for tandem tow
Fig. 20 Switch position for solo tow
Fig. 20 Switch position for solo tow

It is recommended to route the remote control cable and the mechanical cutter pull on the same side of the vehicle along the roof rails and through the side window into the cab, and to secure them.

The remote control gives the winch operator complete control of the winch, including line release. Both an electric trigger (button on top of remote) and a mechanical pull are available.

When the line is being paid out, an audible beep and a white flash of the left LED (Drum Rotation) occur with each drum revolution, allowing the operator to easily monitor line pay-out.

4. Assembly overview

Components of the TowTechniks T2: line cutter, tower prism, measurement unit, line drum, brake drum, on/off switch, distributor, control unit.

Fig. 22 Overview of TowTechniks T2 components
Fig. 22 Overview of TowTechniks T2 components
Fig. 23 TowTechniks T2 with cables and mechanical cutter pull
Fig. 23 TowTechniks T2 with cables and mechanical cutter pull

5. Notes and repairs

5.1 Repairing the tow line

All line repairs must be carried out in accordance with manufacturer instructions and are the sole responsibility of the winch operator. The winch operator must be familiar with the special repair technique.

When repairing synthetic tow lines, the line is typically spliced to ensure unobstructed line feed into the roller system.

Fig. 24 Beginning to splice a Dyneema tube tow line
Fig. 24 Beginning to splice a Dyneema tube tow line
Fig. 25 Feeding one end into the other using a splicing needle
Fig. 25 Feeding one end into the other using a splicing needle
Fig. 26 Complete the splice by pulling both ends and smooth the splice point
Fig. 26 Complete the splice by pulling both ends and smooth the splice point

5.2 Re-inspection

Every tow winch in Germany is subject to mandatory re-inspection. The owner is responsible for compliance. The inspection is carried out by the manufacturer or a DHV-approved inspection centre and documented with an inspection report.

5.3 Inspection intervals

Every tow winch with a quality seal or type approval number is subject to a regular 24-month re-inspection requirement.

If inspection intervals are not observed, the operating permit lapses!

5.4 Operation in Germany

Important: To keep the DHV quality seal valid, the winch must be inspected every 24 months by the manufacturer or the DHV inspection centre. Adjustments or repairs may only be carried out by persons certified by the manufacturer.

The following additional rules apply in Germany:

  1. The DHV winch operator regulations and flight operations order apply.
  2. Towing is only permitted at airspace-approved tow sites.
  3. A yellow rotating beacon must be visibly activated during towing.

5.5 Safety notice

By using the TowTechniks T2 payout winch, you as the winch operator and paraglider pilot, each holding the required licences, are responsible for operating the winch correctly and accept all risks of this activity, including injury and death.

Improper use or misuse of the TowTechniks T2 increases this risk considerably. Under no circumstances shall TowTechniks or the seller of the TowTechniks T2 be liable for injuries or damage to users or third parties caused by improper use of the winch.

If any aspect of using this equipment is unclear, please contact TowTechniks directly: info@towtechniks.com.

6. Further notes

6.1 Notes on towing

The TowTechniks T2 payout winch is designed for solo and tandem towing of paragliders. The joint flight operations order and the winch operator regulations of the Deutscher Hängegleiterverband e. V. (DHV, as of 02-2019) must be observed. Neither step-towing nor hang-glider towing is intended or permitted with the TowTechniks T2.

6.2 Special conditions / emergencies

6.2.1 Command “Halt Stop”

If the command “Halt Stop” is given before launch, the winch operator reduces pull to zero and the driver stops the tow vehicle. If “Halt Stop” is called during towing, the winch operator carefully reduces pull while the driver gradually reduces vehicle speed to allow the pilot to land safely.

6.2.2 Triggering the line cutter

If a fault occurs during towing that requires cutting the line, this can be done electrically via the red button on top of the remote control, or mechanically via the separate pull. In accordance with DHV guidelines, the line must be cut immediately if there is danger to the pilot, winch operator or third parties.

The cutter can be re-cocked with a bracket as described in Ch. 3.5. Check that it locks correctly into place.

6.2.3 Line break

A line break can occur at any point during towing without prior warning. For this reason, the winch operator and tow pilot must always fly in a way that allows the correct action to be taken immediately in the event of a line break (safety climb-out).

6.3 Environmental responsibility

When operating the TowTechniks T2, respect for nature and the landscape is required. This can be achieved for example by laying out the tow line carefully to avoid trampling farmland or damaging crops.

Since no oils or lubricants are required to operate the winch, there is no risk of contaminating paths or soil. As an additional protective measure, it is recommended to lay out sturdy tarpaulins to protect the ground and paragliders, especially during launch preparation.

6.4 Storage and transport

The TowTechniks T2 should be stored upright on a firm surface, kept dry. Due to its weight and size, it should be carried by 2 persons, using the lower struts of the winch as handles.

6.5 Disposal

The TowTechniks T2 is made of high-quality materials which must be properly separated and fed into the recycling cycle when disposed of. Material separation must be carried out by qualified personnel, a specialist company, or the manufacturer.

7. Maintenance

7.1 Motors

The motors are maintenance-free.

7.2 Line guide roller system

Before each tow session, check that all rollers run smoothly. In case of faults or damage, replace the affected component.

7.3 Line cutter

Check that the cutter blade moves freely and inspect the cutting edge. If the cutting edge shows significant notching, replace it to ensure reliable function. Before each session, test the cutter: cock it, insert a scrap piece of line, trigger it — the line must be cut completely through.

7.4 Line winding unit

The line winding unit is maintenance-free.

7.5 Brakes

After approx. 2,000 tows, check the set pre-tension of 5–8 kg and adjust if necessary. New brake pad thickness is approx. 10 mm. If a visual inspection shows thickness below 3 mm, replace all 6 brake shoes on both half-shells.

Fig. 27 Adjusting pre-tension with threaded rod and lock nuts
Fig. 27 Adjusting pre-tension with threaded rod and lock nuts
Fig. 28 Brake pad thickness
Fig. 28 Brake pad thickness

7.6 Tow rope assembly

Check lines and attachment eyes for wear and replace if necessary. Replace the weak link after wear or after 250 tow cycles. Inspect the line parachute and its lines for damage and replace if necessary. In addition, check all connection points regularly.


Original document: The complete operating manual V 2.2 is available as a PDF from the DHV.

Download DHV operating manual B_05-0042-20 (PDF)