B) Firefly's Specifications
|| IW Varvet, Henån, Orust, Sweden, 1976
||Sparkman & Stephens, New York, USA
||IW-40, hull no. 6 (of 35), S&S Design #2186
Dimensions and tanks:
|WATERLINE LENGTH (designed)
|AIR DRAFT (bridge clearance incl. antenna)
|FUEL TANK (stainless steel)
|WATER TANKS (stainless steel)
||2 x 180 l
||2 x 48 USgl
|MAKE and MODEL:
||Volvo, MD21A (4 cyl. Diesel with mechanical gearbox RB)
||0.5 liter per NM at 1800 RPM, 6 kts crusing speed
||Hasselfors Foldomatic 16
x 12; Replaced with KiwiProp in 2008
|| 30 mm St/St; P-bracket with cutless bearing; stuffing
box with "Drip-Free" packing
Note: This Volvo uses a Peugeot diesel engine block (by Indenor, France).
The lube oil consumption is still low enough to not have to top up between
100 hrs oil changes. Many engine spares.
C) Equipment on Firefly
- VHF: Icom IC-M45 with stainless steel whip antenna at masthead.
- Log: Silva Nexus Sea-data (speed, log, water temp.)
- Depth: Navman Depth 3100
- GPS: Garmin 75 (+ spare)
- Repeater display: Furuno RD-30 (2012)
- Lapop computer with chart plotter; weatherfax.
- Radar/plotter: Furuno 1722C Navnet in aft cabin or in cockpit; antenna
mounted on front of mast (2002).
- SSB/Ham radio: Icom IC 735 with autotuner to wire from transom to
- EPIRB: McMurdo 406 Mhz (2006)
- Autopilot: AutoHelm 3000 (not used in heavy wind sailing)
- Casette/stereo/CD with 4 speakers
- TV: Grundig multistandard P 25-449/12
, digital converter & amplified antenna
- WIFI: long range 'Nanostation' receiver and onboard wired network.
- Service batteries: 12 V, 430 Ah (2016).
- Starting: 12 V, 70 Ah with parallel switch (2013).
- Charging: 60 A alternator on main engine; 45 A/115 VAC auto charger; 15 A wind/towing generator.
- Solar panels : 3x 100W semi-flexible, using Sunpower cells (22% efficiency),
MPPT regulators (2013).
Cambered and mounted over bimini.
Covers all electrical needs in normal conditions.
- Shore power: basic 30 A/115 VAC with 2 GFI duplex outlets, water
heater and 45 A battery charger.
- Generator: Portable Honda EU 1000i, 1000W, petrol.
- DC panel with fuses, volt and amp meters.
- Aquasignal St/St navlights on stern, combined at bow, on mast front;
tricolor at masthead.
- Deck light on mast front. Cockpit light under bimini.
- 150 W 115 VAC inverter.
- 6 x 12 V outlets.
- Mostly LED lighting inside.
- Portable spotlights: 12 V corded.
- Fridge/freezer: Isotherm/DB35, air cooled (2011), consumption 14-25
Ah/day (depending on climate), box insulated with Aerogel (nano technology).
- Fans: 2 in salon, others over aft bunks.
- 3 CQRs: 25lb, 45lb, and 60lb.
- Chain: 60m (180 ft) of 3/8" BBB;10m (30 ft) and 3m (15 ft) of
- Rodes: 75 m (240 ft) 16 mm nylon multiplait and 33 m (108 ft) 12
mm nylon 3-strand.
- Windlass: Francis make, electric, vertical axis, with manual backup (1987).
- 2 bow rollers (one main, one small)
- The windlass is far enough back that the chain is stored under the
aft end of the v-berth, putting the weight well aft and below the waterline.
|Mainsail (laminated leach)
|Working jib 1
|Working jib 2 (biradial+UV strip)
|Staysail (hanked on)
2 Spinnaker poles (full size and short one for jib)
- 2 Enkes 32 2-speed (primaries) (Enkes size numbers are different
from others, the 32's being much larger)
- 2 Enkes 28 2-speed
- 2 Lewmar 42 2-speed in front of cockpit with line clutches for halyards
- Lewmar 30 self-tail, Lewmar 16 2-speed and Lewmar 8 on the mast
- Windvane: Aries "lift up" (1987)
- Liferaft: Viking Rescue 4-man, cannister (2011)
- Heater: Eberspracher (Espar) Airtronic D4 forced air; diesel; 4 speeds;
3 outlets (2001)
- Bilge pumps: 2 manual Whale Gusher (in cockpit and salon bilge)
- Hull construction is solid fiberglass with foam stringers.
Deck and cabin top are foam core sandwich with teak planking.
(For hardware, winches, mast partners, etc., the foam core was substituted
with aluminium plate, making it very strong and stiff.). Topsides
are painted (new 2005) with white Awlgrip, a blue cove stripe and water
line . There is a slight tumblehome. A very strong and safe construction.
There is no flex in the deck anywhere.
- Keel is 4.06 tons cast lead with stainless keel bolts, and
a stainless V-shaped "shoe" on the bottom edge.
- The toerail , mast, boom and spinnaker pole
are clear anodised aluminium (on later IW 40's they are black).
- The rig is a single spreader, clear anodised aluminium extrusion
by Selden (E-section 237/162), with single lower shrouds, baby stay,
inner forestay and running backstays. The backstay has a David Carne
hydraulic tensioner and the headstay a Hood Seafurl 5 (2002, lifetime
warranty). The main standing rigging is 10mm 1x19 wire (headstay 2002,
lowers 2011, inner, runners and baby 7 and 8mm 1987). With the addition
of the inner forestay, running backstays and intermediate shrouds (1987)
we feel the rig could withstand loosing any one stay.
- There are 2 Goiot hatches (new Plexiglas 2001), and 3 stainless
steel framed clear windows on each side of the house. (On other IW's,
the windows appear as one long black band on each side).
- There are 2 sliding hatches: the original entrance from the
bridge deck down into the main saloon, plus the aft entrance directly
from the cockpit into the aft cabin. (The aft entrance, added after
the building, is probably unique to this and a couple of other IW 40).
- The wheel steering is by chain and cable to a quadrant, with
3.5 turns hard over to hard over. The rudder has a full skeg with lower
bronze on st/st bearing.
- The deck hardware (turning blocks, sheet tracks, etc.) is
Lewmar, of a size mostly found on larger boats.
- The cockpit has teak seats, floor and coamings. There is a
rope locker to stb. and a self draining propane locker to port, with
two 5kg tanks, solenoid valve and pressure gauge for leak testing (the
pipe to the stove is a single copper tube with no joints other than
the hose connections at either end). New bimini sunshade 2012.
- On the stern there are 2 liferings (one with a long
floating line, one with a backstay mounted lighted man overboard
pole). There is also one throwable rescue line package.
- The stainless steel hardware (pushpit, pullpit, stanchions,
steering wheel and entrance side bars) is of premium Norwegian quality
that does not rust or pit.
- The foredeck has a locker for fenders, dinghy fuel, etc.
- The fiberglass, clinker style dinghy fits on deck below the
boom (upside down or top side up) and covers the forward entrance hatch.
The 2.5hp outboard engine fits on a pushpit bracket. This is
a good sturdy rowing boat.
- The interior is finished in teak faced marine plywood, with
solid teak trim. Where there are curves, the trim is laminated teak
(door frames, seat edges, galley and head counter edge, crash bar in
front of stove, etc.). The floors are teak and holy faced plywood.
The ceiling panels are off-white vinyl with varnished teak battens
- The interior layout is different from the standard one (see
the layout plan). The aft cabin
is similar, but with the addition of the cockpit entrance, and a larger
stb. side bunk (but no door forward to stb.).The fuel tank is under
the aft section of the stb. bunk; it has a drain valve at the bottom
for water stripping. Moving forward, to port is a chart table, then
galley, with two burner Upo gimbaled oven/stove, twin sinks with pressure
hot and cold (also a foot pump) water (new pump and water heater 2012),
a salt water faucet (foot pump) and a filtered drinking water spigot.
There are two large pull out vegetable bins, cupboards and other food
storage. The headroom in the center has been increased from the original
by lowering the floor about 8cm. To starboard is a U-shaped settee,
with a table that can slide sideways to facilitate getting in and out.
The table also lowers to make a large bunk. In the center is the engine
and fridge box, below the bridge deck entrance hatch. The fridge can
easily be removed for total access to the aft part of the engine. The
top, front, sides and part of the aft of the engine box can also be
removed for access. Forward is the other part of the saloon, with port
and stb. settees/bunks, book shelves, and closets. The 2 water tanks
under the settee/bunks have inspection hatches for easy cleaning. There
is a small table on the mast which can be raised to the ceiling, out
of the way. Forward to port is the head (Blake Lavac), washbasin and
a shower with electric sump pump (thermostatic water temperature control;
'hot water valve to tank' for quick hot water without waste). To stb.
are two closets, and in front, a short V-berth, with storage underneath,
including the chain locker (which drains into the shower pan).
Leo Lindstrand. All rights reserved.