After many hours spent on this forum, I am finally opening a topic.
We are a team of 4 students from Swiss University (EPFL) studying mechanical engineering in differents topics : fluid, control system and material science. We are doing a project where we want to design a e-foil with the particularity of having a retractable mast ( I know it’s quite ambitious but we are in the Laboratory of Applied Mechanical Design).
We are choosing the motor, ESC and battery.
We are going to command the piece, and it would be interesting to have your opinion about it.
Motor : In Stock Maytech IP68 Waterproof MTI85165 200KV Inrunner Brushless Sen – Maytech.cn--Maytech official website We have decided to oversize the motor because we will have a lot of drag due to our mast the mast that will not be as profiled as a commercial mast.
Battery : We do not have time to make our own battery with 16065 Li-Ion Cell, for that case I have decided to make a Li-Po assembly with this Li-Po 6000mAh 6S 12C : https://hobbyking.com/en_us/turnigy-high-capacity-16000mah-6s-12c-multi-rotor-lipo-pack-w-xt90.html?queryID=5e38ec7c05e74343d64cf3ab1a34fd16&objectID=80206&indexName=hbk_live_products_analytics
It will be assembled in 2S2P, so it will have 32 000 mAh and 44,4V
I have multiple questions
- First about sizing the battery, we would like to have around 30-45 min of autonomy, how can I predict that my capacity is big enough ? The Constant Discharge is 12C and Peak Discharge (10sec): 24C, therefore with a capacity of 32Ah it will give 12*32 = 384 A, is it ok with our motor and ESC?
It’s already late in the noon, I will give more information tomorrow with other questions like dimension of the board, of the foil…
Thank you and do not hesitate to give your opinion, I will try to answer as quickly as possible, but I have a lot of work haha