59
A
B C
D
E
F
G
H
A
B
C
Grand Soleil 58, 17.68 m (58'), Cantiere del Pardo © Fabio Taccola / Grand Soleil
D
E
F
G
H
FW250EA12H
FW250EA24H
FW250EA48H
FW250HA
FW500EA12H
FW500EA24H
FW500EA48H 
FW500HA
FW1000EA24H
FW1000EA48H
FW1000HA
FlatWinder Powered Block
The Harken FlatWinder powered block is a self-contained, low-profile powered system developed for 
mainsheet traveler adjustment. This powerful block is easy to use and offers sailors huge 
benefits in mainsail control, giving them the means to quickly depower the rig, and delay reefing when 
the wind picks up. Like a compact captive winch for the traveler, the FlatWinder is completely self-con-
tained. It operates in both directions allowing the car to move anywhere on the track while also keep-
ing the traveler line off the cockpit floor. FlatWinders can be also used for other applications, like stern 
platform lifting or foil trimming. Contact Harken Tech Service for more details.
The Flatwinder is available with an electric or hydraulic motor. The compact horizontal motor is 
housed neatly belowdeck and has a maximum working load of 250/500 kg (550/1100 lb). When used 
with 10 mm line and a 4:1 purchase, this translates into around 1000 kg (2205 lb) of pull with the 
FlatWinder 250; 2000 kg (4410 lb) with the FlatWinder 500. The FlatWinder 250 fits monohulls 15 - 18 
m (50 - 60') and catamarans 14 - 15 m (45 - 50'); the FlatWinder 500 fits monohulls 18 – 24 m (60 – 
80') and catamarans 15 - 20 m (50 - 70').
The FlatWinder is available in 12V, 24V, or 48V electric or hydraulic depending on the boat’s 
system. A Harken Dual-Function Control Box is included with the electric FlatWinders. This integrated 
load controller and control box conserves space, and with half as many wires as separate 
systems, is easier to install. Switches and circuit breakers are not included.
Dimensions
Line entry 
height (LE)
Part
No.
A
B
C
D
E
F
G
H
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
 FW250EA12H 
 7 9/16 
 192 
 8 7/8 
 226 
 5 1/8 
 130 
 2 
 51 
 1 3/4 
 43 
 6 1/8 
 155 
 8 15/16 
 227 
 12 11/16 
 322 
 FW250EA24H 
 7 9/16 
 192 
 8 7/8 
 226 
 5 1/8 
 130 
2
51
 1 3/4 
 43 
 6 1/8 
 155 
 8 15/16 
 227 
 12 11/16 
 322 
 FW250HA 
 7 9/16 
 192 
 8 7/8 
 226 
 5 1/8 
 130 
2
 51 
 1 13/16 
 46.5 
 5 31/32 
 151.5 
 8 23/32 
 221 
 12 15/32 
 316.7 
 FW500EA12H 
 9 1/2 
 242 
 10 3/4 
 273 
 6 
 152 
 2 1/16 
 53 
 2 13/16 
 71 
 9 1/8 
 231 
 14 5/16 
 363 
 19 1/16 
 484 
 FW500EA24H 
 9 1/2 
 242 
 10 3/4 
 273 
 6 
 152 
 2 1/16 
 53 
 2 13/16 
 71 
 9 1/8 
 231 
 14 5/16 
 363 
 19 1/16 
 484 
 FW500HA 
 9 1/2 
 242 
 10 3/4 
 273 
 6 
 152 
 2 1/16 
 53 
 2 13/16 
 71 
 9 1/8 
 231 
 11 3/8 
 289.3 
 16 5/32 
 410.2 
FW250EA48H
 7 9/16 
192
 8 7/8 
226
 5 1/8 
130
2
51
1 1/2
39
6 1/4
159
9 1/2
241
13 1/4
337
FW500EA48H
 9 1/2 
242
 10 3/4 
273
 6 
152
 2 1/16 
53
 2 13/16 
71
 9 1/8 
231
13 7/8
351
18 1/2
472
FW1000EA24H
9 1/2
242
12 1/4
310
7 1/2
189
2 1/2
62
2 3/4
71
4 7/8
125
19    
483
-
-
FW1000EA48H
9 1/2
242
12 1/4
310
7 1/2
189
2 1/2
62
2 3/4
71
4 7/8
125
19    
483
-
-
FW1000HA
9 1/2
242
12 1/4
310
7 1/2
189
2 1/2
62
2 3/4
71
4 7/8
125
14 9/16    
370
-
-
Part
No.
Description
Weight
Line entry
height (LE)
Line Ø
Fastener
circle
Fasteners
(SH or HH)
Maximum 
working load
Line speed
(no load)
lb
kg
in
mm
in
mm
in
mm
mm
lb
kg
ft/min
m/min
 FW250EA12H 
 FlatWinder powered block/12-volt 
 27.5 
 12.5 
 1 1/8 
 29 
 3/8 
 10 
 4 15/16 
 125 
 6 x M6 
 550 
 250 
 115 
 35 
 FW250EA24H 
 FlatWinder powered block/24-volt 
 27.5 
 12.5 
 1 1/8 
 29 
 3/8 
 10 
 4 15/16 
 125 
 6 x M6 
 550 
 250 
 115 
 35 
 FW250HA 
 FlatWinder powered block/hydraulic 
 24.2 
 11 
 1 1/8 
 29 
 3/8 
 10 
 4 15/16 
 125 
 6 x M6 
 550 
 250 
 63 
 19.2 
 FW500EA12H 
 FlatWinder powered block/12-volt 
 49.6 
 22.5 
 1 1/8 
 29 
 3/8 
 10 
 6 5/16 
 160 
 6 x M6 
 1100 
 500 
 85 
 26 
 FW500EA24H 
 FlatWinder powered block/24-volt 
 49.6 
 22.5 
 1 1/8 
 29 
 3/8 
 10 
 6 5/16 
 160 
 6 x M6 
 1100 
 500 
 105 
 32 
 FW500HA 
 FlatWinder powered block/hydraulic 
 38.5 
 17.5 
 1 1/8 
 29 
 3/8 
 10 
 6 5/16 
 160 
 6 x M6 
 1100 
 500 
 41 
 12.5 
FW250EA48H
FlatWinder/48-volt
28.2
12.8
 1 1/8 
29
 3/8 
10
 4 15/16 
125
 6 x M6 
 550 
250
72
22
FW500EA48H
FlatWinder/48-volt
53.57
24.3
 1 1/8 
29
 3/8 
10
 6 5/16 
160
 6 x M6 
 1100 
500
47
14.3
FW1000EA24H
FlatWinder/1000 A EL HO 24V
64.0
29.0
1 1/8
29
  3/8
10
6.57
167
 6 x M6 
2208
1000
82
25
FW1000EA48H
FlatWinder/1000 A EL HO 48V
64.0
29.0
1 1/8
29
  3/8
10
6.57
167
 6 x M6 
2208
1000
82
25
FW1000HA
FlatWinder/1000 A HY HO
64.0
29.0
1 1/8
29
  3/8
10
6.57
167
 6 x M6 
2208
1000
82
25
Line entry 
height (LE)
Electric
Hydraulic

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