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Omer 11

Prix, Records & Reconnaissances

2022

Innovation Award


Feel The Force Trophy 

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PUSH INNOVATION EVEN FURTHER

Having already demonstrated our ability to perform well in each of the categories, we decided to take a step further and design a concept never seen before.

Omer 11 is therefore the creation of several months of work with the aim of pushing the limits of the manufacture of human-powered submarines. It has the same hull shape as Omer X, allowing the team's efforts to be focused on other major elements such as the two propulsion modes, their control modes and their manufacture.

FIRST HYBRID SUBMARINE

Omer 11 is the first submarine to have two propulsion systems that it can interchange between races. The first system is a standard propeller propulsion system. It is equipped with pre-cambered blades with variable pitch controlled from the on-board computer. It is also equipped with a propellerless propulsion system, similar to that of Omer X. This system has been completely revised to reduce weight and reduce mechanical losses.

PUBLICATIONS OF OMER 11

WHERE IS IT NOW?

Omer 11 is still functional and is currently being used during club presentations and demonstrations. It is also on display at the entrance to pavilion D of the École de technologie supérieure in Montreal.

Propeller propulsion

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Omer's propeller type propulsion has been designed to be adaptive and aggressive, promising higher speeds than the club has achieved before. 

The design and manufacture of the aluminum tail cone, made directly from the ETS, allows for a more resistant part without sacrificing buoyancy. Indeed, the cone was 3D printed to be able to include cavities in its walls and offer a lighter design.

In addition to being a marvel of engineering, the aluminum cone also allows the use of the single blade. This blade, longer than normal and pre-cambered, makes it possible to reduce the losses of propulsion caused by the turbulence of systems with several blades. Indeed, the agitated water after the passage of a first blade has the effect of reducing the efficiency of the second. By using only one blade, the losses are thereby reduced. The length of the single-blade and its pre-curvature then compensate for the losses of propulsion, which results in a highly optimized system.

The only disadvantage of the single blade lies in its torque. Indeed, the moment of force created at the start of the race causes an imbalance and makes the submarine pitch. However, this effect is easily correctable using weights on the pitch side.

Propulsion without propeller

With the Omer 11's various propulsion systems, we noticed that the biggest issue was the non-constant torque felt by the rider. Indeed, pedaling in Omer X was like pedaling on a rocky road with random bumps. Changes had to be made then.

The final version of Omer 11's propellerless propulsion system therefore consists of four mirage blades and is equipped with a cam and spring system to accumulate and dissipate energy when it is needed for the pilot feels a constant torque and can thus give more power. 

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