Instructions for use GRP-2054

heavier on the left-hand (port) side than on the right-hand (starboard) side, as seen
from the stern, as this improves the action of the flood duct.
• Position of the propeller: the propeller should be positioned in such a way that the
bottom edge of the shaft (propeller hub) is above the surface of the water when the
model is at speed, as this reduces water friction.
• Step edges: all the steps in the hull which are at right-angles to the direction of
running should be as sharp as possible. The steps reduce the boat’s water resistance
(drag) when at speed, and therefore the model’s running time varies according to the
shape of the edges. Sharp steps also improve the boat’s starting characteristics.
• All-up weight: since racing boats spend more time flying over the water than slicing
through it, it is important to keep their all-up weight as low as possible. For this reason
only lightweight components should be used, and adhesives should be used sparingly
(but do use sufficient for strong joints!). Apply the painted finish thinly.
• Propeller size: with racing boats it has proved advantageous to use high-revving
motors and fairly small propellers, as this combination has the least effect on the
boat’s handling (straight-running characteristics), although it does prolong the
acceleration phase. The 42 mm diameter propeller supplied in the set is well suited to
the Sport, S 14 and MONO 2 power variants. A “K”-series propeller of 43.5 mm Ø
(Order No. 2318.43) is more suitable for the MONO 2 Brushless version. The optimum
size can only be found through practical testing, as it varies according to the capacity
and quality of the drive battery, the condition of the motor, the model’s all-up weight, its
weight distribution, the “chop” of the water, etc.
Parts List
Part Description No. off Material Dimensions in mm
1 Boatstand side panel 2 Plywood 4.0, laser-cut
2 Front hull support 1 Plywood 4.0, laser-cut
3 Rear hull support 1 Plywood 4.0, laser-cut
4 Stern reinforcement 1 Plywood 4.0, laser-cut
5 Servo base 1 Plywood 4.0, laser-cut
6 Hull 1 GRP Ready made
7 Motor mount 1 Plastic Ready made, 1157.2
8 Shaft coupling 1 Aluminium Ready made, 3374
9 Flex-shaft 1 Steel Ready made, 3379.1
10 Shaft coupling 1 Aluminium Ready made, 3382
11 Stern tube and shaft 1 Aluminium / steel Ready made, 1981.3
12 Bracket 1 Plastic Ready made, 2317.42
13 Base 1 Plywood 4.0, laser-cut
14 Propeller 1 Plastic Ready made, 2317.42
15 Rudder system 1 Plastic Ready made, 2363
16 Pushrod connector 2 Plated brass Ready made, 1173
17 Sealing tube 1 Aluminium 6.0 / 5.0 x 10 mm
18 Rubber bellows 1 Rubber Ready made, 3356
19 Steering pushrod 1 Stainless steel 1.5 Ø x 150 mm
20 Servo mount 1 Plastic Ready made, 3893.20
21 Turn fin 1 Plastic Ready made, 3893.20
22 Whip aerial 1 Steel wire 0.6 Ø x 330 mm
23 Hatch cover 1 GRP Ready made
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