OUR HISTORY:

OUR HISTORY:

  2016

Team Managers

Thodoris Kourbelis
Dimosthenis Spathis


Ship Design & Propulsion

Stella Spiraj
Afroditi Kanellopoulou
Eleni Aloniati

Construction

Dimitra Konstantinou
Konstantina Fountouli
Christos Barkitzoglou
Aggelis Themelakis
Sokratis Tzanetos

Foiling Research

Vasileios Tsartsitalidis

 

 

 

Team 2016


2016

Team 2016

 

Team Managers

Thodoris Kourbelis
Dimosthenis Spathis


Ship Design & Propulsion

Stella Spiraj
Afroditi Kanellopoulou
Eleni Aloniati

Construction

Dimitra Konstantinou
Konstantina Fountouli
Christos Barkitzoglou
Aggelis Themelakis
Sokratis Tzanetos

Foiling Research

Vasileios Tsartsitalidis

 

PARTICIPATED IN:

2016

Back in 2016, our team participated in two categories : The lightweight category and The Long Distance race.
In order to get there, we examined a hull from the Laboratory for Ship & Marine Hydrodynamics and modified it to suit the needs of the competition. We used electricity as a fuel, and therefore an appropriate electronic system developed to test and control the electric motor, the remote control system and the telemetry system. For the particular electric motor we were given, the manufacturer proposed a specific propeller from the trade which was used in our first year.

Long Distance Race: 13th
Private Boat: 9th

IMG_4589
IMG_4504


PARTICIPATED IN:

2016

Back in 2016, our team participated in two categories : The lightweight category and The Long Distance race.
In order to get there, we examined a hull from the Laboratory for Ship & Marine Hydrodynamics and modified it to suit the needs of the competition. We used electricity as a fuel, and therefore an appropriate electronic system developed to test and control the electric motor, the remote control system and the telemetry system. For the particular electric motor we were given, the manufacturer proposed a specific propeller from the trade which was used in our first year.

Long Distance Race: 13th
Private Boat: 9th

IMG_4589
IMG_4504


OUR RESEARCH:

Construction:

 

  • Towing tank experiments for hull selection.
  • Construction of 2 transverse hedges made of sandwich composite materials
  • Fence connection using polyester and composite materials.
  • Construction of engine base.
  • Steering position on the steer.
  • Burnishing and painting of the boat.

Ship Design & Propulsion:

 

  • Selection of the recommended motor propeller, variable pitch, 23 cm in diameter.
  • Selection of optimum pitch with the highest degree of performance as well as freeflow features for 3 different pitch ratios
  • Selection of the three-phase cone-shaped outboard motor with a maximum power demand of 1400 watts at 3000 rpm and weighing 3.89kg.
  • Development of a telemetry system in order to obtain some information such as speed, position and various motions of the vessel on the 6 axes, still demanding and consuming battery power



OUR RESEARCH:

Construction:

 

  • Towing tank experiments for hull selection.
  • Construction of 2 transverse hedges made of sandwich composite materials
  • Fence connection using polyester and composite materials.
  • Construction of engine base.
  • Steering position on the steer.
  • Burnishing and painting of the boat.

Ship Design & Propulsion:

 

  • Selection of the recommended motor propeller, variable pitch, 23 cm in diameter.
  • Selection of optimum pitch with the highest degree of performance as well as freeflow features for 3 different pitch ratios
  • Selection of the three-phase cone-shaped outboard motor with a maximum power demand of 1400 watts at 3000 rpm and weighing 3.89kg.
  • Development of a telemetry system in order to obtain some information such as speed, position and various motions of the vessel on the 6 axes, still demanding and consuming battery power


constructing
2E1
2E2
1E1

HOW IT ALL STARTED:

HOW IT ALL STARTED:

  • Jan 2016

    Team Foundation

    In 2016 the PhD students of our faculty Thodoris Kourbelis and Demosthenes Spathis along with two undergraduates Socrates Tzanetos and Konstantina Fountouli founded the Oceanos NTUA student research team, with the goal of participating in the international student contest “Hydrocontest”.

  • Feb - Mar, 2016

    Choosing Vessel

    Due to lack of experience and limited time, given that our team was set up in February 2016 while the competition took place in July 2016, we decided to use an existing vessel from the Laboratory for Ship & Marine Hydrodynamics. The hull was selected from a wide set of models, according to the limitations and rules of the competition. After the first conversions were made on the boat, the first experiments began to measure the curve of calm water resistance. The next step was to conduct self-propelling experiments to fully investigate the hydrodynamic behavior of the vessel and the most appropriate cruising speed.

  • Apr 2016

    Laboratory of Marine and Hydrodynamics

    The model boat was manufactured by OLYMPIC MARIN SA and was used to experimentally investigate a 76-foot high speed boat. The boat model is 2.310m long in which bare hull resistance experiments were performed for 4 different combinations of displacement and longitudinal position of the center of gravity. The craft is made of composite materials, namely glass fibers and reinforced polyester. This hull was selected on the basis of limitations in dimensions and at the instigation of Mr. G. Grigoropoulos, since it was a slider, which meets the requirements for high speed development.

  • May 2016

    Construction

    After the first resistance assessment experiments were carried out, the process of converting and assembling the model with its equipment was initiated. The changes made were designed to ensure that the boat is properly sailing and that there is no trace of instability or peril in the construction. Yet even, the boat was modified to make it easier to install the equipment.

    In the remaining period, we decided to advance the team empirically with the help of the teachers of the faculty and especially Mr. Tsouvalis, professor of shipbuilding technology, rather than making a major endurance study. The process began, removing all boats and the small superstructure in the stern, and two transverse barriers made of sandwich composites were added for maximum torsional strength and as little weight as possible.

    Still, a rectangular wooden box was built, which served as a base for the engine and was important for its stability. In addition, the steer was fitted to the stern and two small holes were made for the inlet and outlet of the cooling system. Lastly, the boat had to be burnished and painted so that its outer surface becomes flawless.

  • Jun 2016

    Trials and Errors

    After completing the installation of the equipment, the model was tested under real conditions.
    We decided to conduct tests in a straight line as well as to test the helix capabilities in a square experimental tank. During the tests, the first problems of the vessel appeared, issues which mainly had to do with overheating and water inflow. We also noticed that additional measures had to be taken sealing in the area of ​​the engine base. Additionally, there were issues with the propeller’s torque. Folllowing some proper changes and after we reassured that the vessel was operating smoothly, the team was ready for its first entry.

  • Jul 2016

    Hydrocontest

    After the vessel was done and tested in real conditions, the team was fully ready to enter the competition. The team moved to Lausanne and competed without facing any problems in the two categories in which was competing. More specifically, in the lightweight category he ranked 9th and similarly in the resistance race again 9th place among 24 universities internationally. The result has come to be a success, as within a very short time,with zero experience, we managed to have a more than decent presence in the competition.


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