Ab c, Trimming – Pro Boat PRB3350 User Manual

Page 5

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Westward

Trimming

Control Centering

Before the first voyage, or in the event of an accident,

make sure the rudder and sails are centered.
1. Make sure the sails and rudder are centered (neutral)

when the transmitter controls and trims are centered.

2. When needed, manually adjust the length of the

control line between the winch in the boat and the

cleat (A) on each sail boom. Each line is tied off on

the cleat on each sail boom. Always adjust the

length of the line at the cleat, not on the winch

inside the boat.

Centering Controls after Voyages

1. If the model requires excessive transmitter trim (8 or

more clicks of trim per channel), return the transmitter

trim to zero and adjust the control lines on the boom

cleats (A) so that the rudder and sails are in the water

trimmed positions.

2. Adjust the stays (B) on the lines holding the mast

vertically in the boat. Move each stay carefully on

the line so there is no slack. The left and right mast

lines consist of one line put through a hole in a

fitting on the mast.

3. Check to make sure the main boom and front sail

boom are in line with each other. Adjust the length of

the line tied on the booms under the sails if the sails

are not centered with each other. Adjust the stay (C)

at the top of the front (jib) sail to raise the sail on the

mast. Tied control lines may need to be loosened at

the bottom of the sail so that you can tighten the

top of the sail.

Adjusting Sails

After you have centered the sails and the rudder, adjust

the sails for the most fun and safe sailing. Briefly sail

the boat to see how the sails need to be trimmed.
Tighten the stays (B and C) by lifting up on the lower end.

Loosen the stays by lifting then pushing down the upper

end of a stay. Loosen or tighten sail control lines by

coiling the control lines around the cleats (A) and tying

off the end of the line in the slots on the ends of a cleat.
The winch servo has more travel than your sails require

for safe and enjoyable sailing. Set the rigging so that the

lines are JUST taut when the sails are fully retracted and

the servo is at the end of its retraction travel. 

NOTICE: Do not tighten the lines on the sail boom

cleats so that the servo tightens the line too much. 

This may result in a broken line or other damage.

Tip: The DX2M transmitter included with your boat

has a control by the sail stick to change between

50/50 and 70/30 travel. Adjust as desired, but always

ensure you do tighten the line too much and damage

your boat. If you use a computerized transmitter

with your boat, servo travel may be adjusted more

than with the included transmitter. Refer to your

computerized transmitter manual for servo

adjustment instructions.  

Take your time to prepare your sails for the conditions.

Tip: When there is little wind, tighten the sails so

they catch more wind. When there is more wind,

loosen the sails to allow them to flap and let

excess wind spill around the edges of the sails.

A

B

C

5

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