Mach V

	Manufacturer: Gundert Name: Mach V. LxBxH: 1180 x 225 x 200mm. Owner's: Ronald van der Wijden
Motor: Plettenberg HP355BM/40/4. Speed controller: Robbe Navy 570. Batteries: Sanyo 1700 Mah. 2 x 15 cells. Steering servo: Hitec

 

Designer: Egon Will
Manufacturer: Gundert Modellbau
Type: Deep vee powerboat
Length: 1.18m

Description

Designed by the infamous Egon Will, this hull is meant as a fast, electrically powered racer with a preferance for choppy water. The bottom features two steps for increased speed.

My version will be powered by a Plettenberg HP355BM/40/4, fed by 30 cells.

The building process

First step in building up this boat was fitting the rudder and strut assembly to the stern.
Since this was sloped outwards, a filler block had to be created to achieve a vertical surface for mounting the rudder assembly.

To have the shaft exit the stern as low as possible, the bottom was filed down.

The prop shaft is connected to the motor by a 5mm flexible shaft, running in a fixed outer shaft. The outer shaft is glued inside the hull and curves upwards to smoothly connect to the motor shaft.

The free end of the outer shaft is supported by a bracket to eleminate vibrations and to reduce stress and wear on the flexible shaft.

View of the rudder assembly and strut, with water cooling tube and servo links.

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Detail of the rudder assembly and strut.

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Motor and controller installed and connected up.

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Inside view of servo mount and connections.

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Inside the Mach V, ready for action.

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Charging the batteries

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Off she goes!

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In the mean time, the Mach V has seen some action, causing several components like the battery mounts (not yet shown in the above images) to dislodge, ending in a crash resulting in the motor mount breaking lose, yanking the shaft in two.
When I find the courage to rebuild it, more action shots are bound to follow.