Should Underwater Thrusters be cheap?



I’d like to bring the forum’s attention to the a analyses on Underwater Thruster price. First let us have a look on some well known underwater thruster on the market:

1- tecnadyne 260, Thrust 5 Kg, Max input power 350 w, a complete set price starts from 3800$
2- Lian Innovative, Thrust 5 Kg, Max input power 170 w, a complete set price stars from 2300$
3- Bluerobotics, Thrust 5 Kg, Max input power 350 w, a complete set price is about 150$

4- Seabotix, Thruster 5 Kg, Max input power 450 w, a complete set price is about 850$

In the first view It is the Bluerobotics that wins the game. it is much cheaper than the others. But let us have deeper view on all choices.

tecnadyne is an old company with professional reliable products nobody can doubt about their quality, but the price is high and most of the customers can’t afford it.

seabotix is another well known old company. But its technology is old, the motor is brushed, the efficiency is the lowest, but the price is much cheaper than tecnadyne. Also there is a few models that some one can select the best one.

Bluerobotics price is excellent. But it is a new born company and their thrusters have lots of unreliability, seaweeds can stop the thruster. The efficiency is low and there are just two models that some one can select from.

Lian Innovative is mature company. Its price is moderate, the efficiency is best and reliability is the highest. There are more that 30 models and variations. Seaweeds, Fish hitting, Fishing nets cant stop it. And there is no short term maintenance.

By the way let us consider price. I’d like to bring your attention to the price. operation cost of an off shore team, Including, Boat (or ship) some personnel and . . . are fairly expensive. In professional mission it could be more than 15 K US$ per day. What would happens if the mission is unsuccessful. 15 K$ fly. Too bad.

Here the reliability come to account. For project managers, it is unacceptable to loose this money and one day, just because of a seaweed!!! But let us be fair, for hobby that there are no personnel cost, off course Bluerobotics is the best choice.

It’s upon to you. Are you going to be hobbyist in the future or be a professional underwater robotic expertise in the future?