OUR HISTORY:

OUR HISTORY:

  2018

hEAD COORDINATORS

Sokratis Tzanetos
Konstantina Fountouli 

Trimaran

Giorgos Anagnostakis 
Panos Tsioumas 

Electronics

Nick Vlachakis
Thodoris Kardaras 
Pavlos Karagiannidis 
Athanasios Pagonas 
Orestis Sabethi 

 

Propeller

Nikolaos Manikas 
Dimitra Anevlani 
Georgia Ganiou Maria

Marketing

Achilleas Matthaiou 
Menelaos Papadopoulos 
Mihalis Stylianou 
Anastasia Megalokonomou 
Konstantinos Mesolongitis 

 



 

 

 

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2018

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hEAD COORDINATORS

Sokratis Tzanetos
Konstantina Fountouli 

Trimaran

Giorgos Anagnostakis 
Panos Tsioumas 

Electronics

Nick Vlachakis
Thodoris Kardaras 
Pavlos Karagiannidis 
Athanasios Pagonas 
Orestis Sabethi 

Propeller

Nikolaos Manikas 
Dimitra Anevlani 
Georgia Ganiou Maria

Marketing

Achilleas Matthaiou 
Menelaos Papadopoulos 
Mihalis Stylianou 
Anastasia Megalokonomou 
Konstantinos Mesolongitis 

 

 

PARTICIPATED IN:

2018

In 2018, Oceanos team opted to optimize the existing boats rather than building new ones, aiming to attain maximum efficiency. The team chose to rectify all problems from last year and add fresh ideas to its designs, in order to get greatest boat’s performance. 
Thus, we focused on the study of the hydrodynamic efficiency of the models and on the construction of propellers for each vessel as well. For this purpose, it was vital to carry out towing tank experiments.

Mass Transport: 13th
Lightweight Transport: 5th
Long-Distance Race: 11th

2018-11
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PARTICIPATED IN:

2018

In 2018, Oceanos team opted to optimize the existing boats rather than building new ones, aiming to attain maximum efficiency. The team chose to rectify all problems from last year and add fresh ideas to its designs, in order to get greatest boat’s performance. 
Thus, we focused on the study of the hydrodynamic efficiency of the models and on the construction of propellers for each vessel as well. For this purpose, it was vital to carry out towing tank experiments.

Mass Transport: 13th
Lightweight Transport: 5th
Long-Distance Race: 11th

2018-11
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OUR RESEARCH:

Construction:

  • Design of the reconstruction of  the existing hull into a trimaran hull type.
  • Meeting with Technohulls’ team and adjustment of the first design.
  • Construction  of two extra hulls with a very small draft at Techohulls’facilities.
  • Reinforcement of the final design by three stabilizer fins in order to counteract the roll by producing hydrodynamic lift or downforce when the boat needed it.

Εlectronics:

  • Construction of  our own flight controller using a Raspberry pi.
  • Development of a live telemetry data flow for the course of our boat such as velocity, rpm, pitch, which we accessed via a computer/tablet.

Propulsion System:

  • Selection of  the systematic series: Wageningen B-series as a reference for the propeller’s design.
  • Design and construction of three different propellers, one for each race.
  • Development of the final product mechanical 2D designs in a professional CAD/CAE environment.


OUR RESEARCH:

Construction:

  • Design of the reconstruction of  the existing hull into a trimaran hull type.
  • Meeting with Technohulls’ team and adjustment of the first design.
  • Construction  of two extra hulls with a very small draft at Techohulls’facilities.
  • Reinforcement of the final design by three stabilizer fins in order to counteract the roll by producing hydrodynamic lift or downforce when the boat needed it.

Εlectronics:

  • Construction of  our own flight controller using a Raspberry pi.
  • Development of a live telemetry data flow for the course of our boat such as velocity, rpm, pitch, which we accessed via a computer/tablet.

Propulsion System:

  • Selection of  the systematic series: Wageningen B-series as a reference for the propeller’s design.
  • Design and construction of three different propellers, one for each race.
  • Development of the final product mechanical 2D designs in a professional CAD/CAE environment.
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2017 – 2018 TIMELINE:

2017 – 2018 TIMELINE:

  • Nov 2017

    Trimaran and Foils’ Research

    Regarding the boat of the lightweight category, two were the options with which the problems of road stability could be solved. The first one was to add two extra floats to the boat and turn it into a trimaran. The two floats would be of small size and would help to stabilize the boat. This conversion was done and resistance experiments were carried out to investigate the effect of the floats on the boat’s resistance.However, this idea did not succeed, as after real-time experiments it turned out that the problem of road stability was not solved

    The second idea was to make the craft a hydrofoil. The team was directed to types of hydrofoils that offer stability and are indicated for single-boat boats. The aim was to allow the hydrofoils to be tested at certain slopes without the help of an electronic system that would make the construction more perplexed. Not unexpectedly, such choice equals the disadvantage of taking a lot of testing. Various types of hydrofoils have been manufactured and listed for the tests. Unfortunately, the time for testing this type of boat proved to be very little and a bunch of  problems arose in several tests. Needless to say, the results were quite encouraging.

  • Dec 2017

    Stabilizers' Research

    An alternative idea to the trimaran project was the study and adjustment of active stabilizer fins to our lightweight boat. Based on the last year’s data we had collected, we  made a controller that had  as input the data from the sensors (gyroscope, accelerometer) and calculated the fins’ angle of attack which were actuated by a servo motor. The fins counteracted the roll by producing hydrodynamic lift or downforce when the boat needed it.

  • Mar 2018

    Visit at Technohull

    Since the survey was complete, the team visited Technohull’s offices to discuss the appropriateness of these ideas. With our workers’ know-how, our initial ideas have been adjusted accordingly to achieve the best result.

  • Apr 2018

    Finishing the Propeller and Electronics Project

    The main ambition of our team was to design and build its own propellers for each boat and each category of the competition. Before their design began, the team needed the resistance curves of the boats, and for this reason similar experiments were carried out. Subsequently, using the results of the resistance and entering the Grid program, which was developed in the laboratory by Mr. G. Politis, professor of ENTHY, the selection of propeller characteristics was made. Even with the help of a code made by the members of the group, the three-dimensional design of the propels was easily achieved.

  • May 2018

    Construction

    Then three-dimensional printing was chosen for the construction of the propellers, since it was the least time-consuming, relatively low cost and good surface quality which is quite important in the performance of the propellers. In particular, 3D printing of SLA technology (StereoLithography Apparatus) was selected with a hard resin grade material for maximum detail and durability.

  • Aug 2018

    Trials and Tests

    As mentioned above, the trimaran solution failed in the trials, and the second hydrofoil solution needed more testing to obtain reliable results for the cruise ship. However, during the tests, observing the behavior of the boat,we decided to place the engine on the bow and abandon the traditional steering, but to turn the whole engine to turn the boat. This change markedly improved the problem of running stability and still solved the steering problem faced by the boat.

    On the other hand, the heavywieght with the addition of the new propeller has further increased its performance and the only one that the team has changed was his bulb to be more efficient at the speeds he was sailing.

     

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2018
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SPONSORS:

SPONSORS:

We are so happy that our cause is sponsored by:

2018