Really new here, looking to build my first boat, a 30 inch 3d printed monohull jet boat

[Edward Waylon]

So I'm trying to build a 30 inch monohull jet boat, i found some good videos that explain the electronics and which ones I need to buy.

Although I have the formulas fo the power and stuff for the boat but they probably only apply to propeller driven ones.

I'll design my own jet drive but first, I need to know what diameter i should make it and how much power it needs.
I'll probably take inspiration from this guy: https://m.youtube.com/@mjetdevelopment
And the video I'm learning from:

So is there any formula to know the power for a jet driven boat? Still gotta choose the electronics btw.

 

[Edward Waylon]

based off some jet drives sold online and what they say should be used for i'd go with pobably 1000W or less and 35-40mm diameter

 

[Jeff Barnes]

Welcome

 

[Peter Wibe Enevoldsen]

i have a few boats with the Mjet drives, go for a 40mm motor and less than 35000 unloaded rpm and a seaking 180 and you will be good to go