Dragonfly · Trimaran

Dragonfly 28

The Dragonfly 28 is an 8.75 m folding, trailable trimaran designed by Jens Quorning with Steen Olsen and built since 2009 by the family yard Quorning Boats at Skærbæk near Fredericia, Denmark, as the successor to the Dragonfly 920. Its Swing Wing system swings the floats in from the cockpit, from 6.50 m to a 2.54 m beam, so only the mast has to come down before the boat goes on its road trailer; with the centreboard up it draws 0.40 m, and the outboard steers together with the tiller. It came as the Touring with an aluminium mast and the Sport with a taller carbon rig, joined in 2016 by the Performance, which pairs the Sport rig with longer, higher-volume wave-piercing floats; today Quorning builds the Touring and the Performance.

Manuals & documents

The links go to Dragonfly’s own documents — some as archived copies of pages the maker has since taken down. We host no manuals or drawings.

Equipment & its manuals

Standard equipment as the builder’s documents list it. Boats were ordered with options and refitted since — check what is actually aboard.

ItemModelManual / pageNote
OutboardHonda 15 HP1,2,3,4Current boats (builder’s pages 2025–2026): 15 hp with electric start and electric tilt, on the Touring and the Performance—Mounted on the centreline at the stern and linked to the tiller, so it steers with the rudder. Quorning gives no Honda model designation; Honda’s 15 hp outboard is the BF15, and our Honda BF15/BF20 page lists its parts.
Outboard8–10 HP · 10–15 HP5,6,7,42009–2015 builder’s pages: 8–10 hp; 2016 brochure and owner’s manuals: 10–15 hp; always 15 hp at most, make not named—The manual’s motoring limits on flat water: a 10 hp engine copes with about 22–24 knots of true headwind, a 15 hp with about 30 knots. With the floats folded, the propeller sits 8–9 cm higher and grips less.
Folding systemSwing Wing4,3,8All versions: the floats swing in and out from the cockpit, from 6.50 m to 2.54 m beam—Worked with an endless line (2 × 8 mm Spectra/Dyneema, 23 m) on the two Swing Wing winches. The lines and cables usually need replacing every 3–5 years; rinse sand off the wing sliding pads and spray them with a Teflon-type lubricant if they squeak. The white 5 mm Teflon pad rings on the float decks last about 13–15 years and are changed by unbolting the floats from the wings.
TrailerDragonfly4From the yard; trailer weights in the owner’s manual: 3 t aluminium 700 kg (Performance 650 kg), 3 t steel 850 kg (Touring, Sport), 3.5 t steel 950 kg (Performance 900 kg)—It carries the folded boat at the four reinforced points under the water-stay fittings, and the boat can only be launched with the floats folded in. For storage ashore Quorning also gives away drawings of a steel cradle and a trolley to have built locally; never use a monohull cradle, and if blocks are unavoidable, put the main load on the centreboard case.
Winches2 + 24,9All versions (deck drawing 2017): 2 winches on the coachroof for the jib sheets and halyards, 2 Swing Wing winches on the cockpit coamings; make not named—Lines run through double rope clutches. Harken appears in the manual only as the maker of McLube, the lubricant for the wing sliding surfaces, not as the winch maker.
Furler—4,3Furling jib on all versions, with the furling line led to the cockpit; a Code 0 on its own endless-line furler with a torsion luff in every version’s sail plan; makes not named—Tack the Code 0 to the steel eye on top of the bowsprit fitting, never to the end of the bowsprit, which can break.
SailsElvström1,10Current Touring and Performance (builder’s exterior page); new sails through the yard’s after-sales service—
Steering—4,1All versions: tiller with an automatic kick-up rudder; the outboard is linked to the tiller—Rudder downhaul: 5 mm Dyneema, 4 m, with an adjustable release cleat; up-line 6 mm, 2.5 m; the rudder bushing can be replaced. Check the rudder-head bolt (19 mm spanner). Under power keep the rudder fully down or fully up: halfway, the propeller can hit the blade when tiller and engine turn to port.
Windlass—4Option: electric anchor windlass (July 2026 manual), make not named—The windlass is not meant to hold the boat at anchor: take the load off with a chain hook or a bridle from the U-bolts on the forward beams. The manual recommends an anchor of at least 10 kg with 7–10 m of 8 mm chain plus 12–14 mm rope.
Toilet—4,11,3All versions: manual marine toilet, make not named—Flush water comes in through a 1/2″ seacock. The optional 60 l holding tank takes black water only and has a deck pump-out plus a manual 1 1/4″ pump to sea.
Water pump12 V4Drawings of 2017: electric freshwater pump; a 12 V saltwater pump to the galley was optional; make not named—The 90 l tank is under the forward berth.
Water heater6 l4Option on the 2017 drawings: 12/110/220 V, for the galley and the optional cockpit shower—
Bilge pump—4Drawings of 2017: a 12 V electric bilge pump, reached through the starboard cabin floor, and a manual pump worked from the helm; makes not named—Both discharge above the waterline.
Stove—11,4Option on the current interior page: 2-burner gas stove, make not named; the manual notes that some boats have other stove or oven types—Gas comes from a 3 kg EU steel cylinder in a closed box in the cockpit; a gas detector sits in the drawer under the stove. Keep the galley top cover open while cooking, and have the system checked by a professional every 5 years.
Heater—11,4Option: diesel heater (current interior page), make not named; the 2017 gas drawing also shows a gas heater option—
Fridge—11,6Option (current interior page), make not named; the 2010–2015 pages mention a fridge box in the galley worktop—
Watermaker—4Option shown on the 2017 electrical and through-hull drawings, make not named—
BatteriesVarta 12 V · 70 Ah4Electrical drawing of 2017 in the owner’s manual: one battery as standard, a second one optional; some newer boats have lithium batteries—Replace batteries with the same type, make and size, never with flooded (wet) batteries, and leave lithium replacements to a professional. The manual’s lower limit for lithium batteries is 13.1 V.
ChargerVictron12,13,4Boats delivered with Victron equipment from the yard (described in the manuals since June 2025; devices not listed); optional 110/220 V shore power with RCD and socket on the 2017 drawing—The yard locks the Victron system in ‘User’ mode and switches on VRM remote monitoring. Quorning gives out the password to unlock it but takes no responsibility once it is unlocked. On the 2017 drawing the outboard’s 12 V charging output feeds the battery.
ChartplotterRaymarine · B&G9,4Option: the Sport manual of April 2017 names Raymarine or B&G/Navico, the 2025–2026 manuals Raymarine; models not given—The yard registers the serial numbers against the hull number for the warranty and only does a basic calibration; charts are not supplied. The speed/depth transducer sits in the main-cabin bilge and must be in place before launching.

Specifications

VersionsTouring with aluminium mast (2009–today) · Sport with taller carbon rig (2009 to about 2021) · Performance with the Sport rig and longer wave-piercing floats (2016–today) · 2016 facelift with larger cabin windows on all versions14,15,16,1,17
Years built2009 to today; the prototype was launched in spring 2009 after almost two years of development17,15
Hulls builtMore than 200: No. 50 sold after about two years of production, No. 100 built in 2014, No. 200 delivered in 2019; no later total published18,17
DesignerJens Quorning & Steen Olsen3,7
BuilderQuorning Boats ApS (Dragonfly Trimarans), Skærbæk near Fredericia (Denmark)4,8
Length overall8.75 m on the builder’s model pages and brochures since 2009 · owner’s manual: centre hull 8.70 m, length sailing 9.00 m (Touring), 8.90 m (Sport), 9.30 m (Performance) · current spec page: 9.00 m · folded: 9.99 m Touring and Sport; Performance 10.30 m (manual, 2019 page) or 10.40 m (2016 brochure, current spec page)4,3,6,7,15
Waterline length8.60 m (centre hull)4,6
Beam6.50 m sailing · 2.54 m folded3,4
Draft0.40 m with the centreboard up · 1.70 m with it down3,4
DisplacementStandard boat with sails and engine: 2100 kg Touring and Sport, 2180 kg Performance (owner’s manual 2026); the current spec page gives 2100 kg for both versions · earlier builder figures: about 1700 kg (2009, before launch), 1900 kg with sails (2010–2015 pages), 1950 kg Touring and Sport and 2000 kg Performance (2016 brochure) · max. payload incl. crew 725 kg (manual, Touring and Sport) or 750 kg (manual, Performance; current spec page for both)4,3,5,6,7
Sail areaTouring: mainsail 35 m² + furling jib 19 m², Code 0 35 m², asymmetric spinnaker 65 m² (owner’s manual; current spec page 37 + 18.5 m², Code 0 37 m², spinnaker 60 m²) · Sport: 43 m² (42 m² on the 2009–2015 pages) + 21 m², Code 0 45 m², spinnaker 80 m² · Performance: 43 + 21.5 m², Code 0 45 m², spinnaker 83 m²4,3,6
Mainsail35 m² Touring (37 m² on the current spec page) · 43 m² Sport and Performance (42 m² for the Sport on the 2009–2015 pages); standard mainsail with 2 reefs, a third reef is optional4,3,6
GenoaFurling jib: 19 m² Touring (18.5 m² on the current spec page) · 21 m² Sport · 21.5 m² Performance4,3
Air draft13.75 m above the water (Touring), 15.25 m (Sport, Performance), without antennas; the manual’s safety notes round this to about 15.5 m · mast section 12.10 m aluminium (Touring), 13.60 m carbon (Sport, Performance)4,6,3,1
EngineOutboard, max. 15 hp: 8–10 hp on the 2009–2015 pages, 10–15 hp in the 2016 brochure and the owner’s manuals, 15 hp on the pages since 2019; today a Honda 15 hp with electric start and electric tilt5,6,7,4,15,3,1
Water tank90 l under the forward berth (80 l on the 2009–2015 pages)4,6,7
Holding tank60 l, optional; black water only, with deck pump-out and a manual pump to sea3,4
Berths5, all 2 m long (V-berth 2.10 m): double V-berth forward, double berth aft under the cockpit, two berths made up from the saloon seating11
CabinsForward cabin with V-berth (sliding doors optional), main cabin with dinette and galley on both sides, aft cabin under the cockpit, separate head11
Headroom1.85 m in the main cabin (2019 page); the current interior page gives 1.82 m15,11
CE categoryB (max. 5 people) and C (max. 7 people), certified by the notified body IMCI (No. 0609); the builder calls the boat unsinkable4,3

Good to know

  • Quorning’s replacement intervals for the rig: on the Touring and Sport (built since 2009), water stays every 7 years or 15,000 nm at most, side stays and forestay every 10 years or 15,000 nm, the beam-stop cable under the trampoline every 10 years, the diamond stays on the mast and the safety cables every 15 years. The Performance (built since 2016) has the same intervals except for its water stays: 7 years or 10,000 nm. The structural Dyneema line in the backstay (Sport and Performance) is due every 7 years. An older passage in the manual still says 10 years for Touring and Sport water stays; the maintenance table and the website say 7. Since January 2024 the yard engraves the production year on the rigging terminals.8,4
  • Trailering is hard on the side stays: they bend easily when the mast is stepped, and a kink near a terminal can make a stay break, so the manual says to replace bent stays at once. Also check the top terminal of the forestay regularly, because a spinnaker halyard caught while furling can damage it.8,4
  • Once a year shorten all halyards, reefing lines and Swing Wing lines by about 25 cm, and turn them end for end or replace them after a few years. Have the trampoline seams re-stitched every 6–7 years (every 5 in strong UV); owners usually replace the trampolines after 10–12 years. Renew seacocks and through-hulls when the boat is 15 years old.4,8
  • Boats up to and including hull No. 156 have a factory stop knot on the starboard centreboard lifting line. Leave it where it is: if the board drops too far, it can split the centreboard case and flood the boat.4
  • Never wrap the carbon mast or painted surfaces in plastic or other non-breathing covers, and don’t leave mat fenders on permanently: trapped moisture blisters the paint, and the yard does not accept claims for it. Ask your dealer or Quorning before drilling into the carbon mast.8,4
  • Original parts and Elvstrøm sails come from the yard: email aftersales@dragonfly.dk; common parts ship within about two weeks, special parts take 6–8 weeks. The rigging links are Peguet quick-links, and any replacement must have the same rated working load, since look-alikes are often weaker; the water stays are 10 mm Dyform wire. The owner’s manual lists every line on the Touring and Performance with material, diameter and length, which helps when ordering rope.10,8,4

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Sources

  1. dragonfly.dk/dragonfly-28-exterior/
  2. dragonfly.dk/boats/dragonfly-28/
  3. dragonfly.dk/dragonfly-28-specifications/
  4. dragonfly.dk/wp-content/uploads/2026/07/DF28_Owners_Manual_UK_July2026-1.pdf
  5. web.archive.org/web/20090127021730/http://dragonfly.dk/dragonfly-28/specifications.aspx
  6. web.archive.org/web/20151122051601/http://www.dragonfly.dk/boats/dragonfly-28/specificati…
  7. web.archive.org/web/20160909090841/http://dragonfly.dk/sites/default/files/Dragonfly28_we…
  8. dragonfly.dk/dragonfly-28-maintenance/
  9. dragonfly.dk/wp-content/uploads/2025/03/DF28_Sport_Manual-1.pdf
  10. dragonfly.dk/after-sales/
  11. dragonfly.dk/dragonfly-28-interior/
  12. dragonfly.dk/wp-content/uploads/2025/07/DF28_Owners_Manual_UK_June2025-1.pdf
  13. dragonfly.dk/wp-content/uploads/2025/11/DF28_Performance_Owners_Manual_UK_Nov2025.pdf
  14. web.archive.org/web/20210925185421/https://dragonfly.dk/dragonfly-28
  15. web.archive.org/web/20190919105350/https://dragonfly.dk/dragonfly-28
  16. web.archive.org/web/20160215103103/http://dragonfly.dk/dragonfly-28-performance
  17. dragonfly.dk/dragonfly-heritage/
  18. web.archive.org/web/20190823181223/https://dragonfly.dk/dragonfly-28-hull-no-200

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