Re: [electricboats] Sizing motor for 45-50’ boats

I used a Python Drive thrust bearing and CV shaft combination. There is another similar mfg, but i can't recall the name. The bearing at the motor plate is a radial support bearing. The CV shaft runs aft from the motor plate bearing to a small bulkhead in the bilge where the thrust bearing is mounted. From there the prop shaft runs another couple feet to the cutlass bearing. The small bulkhead was already there and used to hold a radial support bearing for the shaft due the length. 

Chris

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On Mar 15, 2021, at 16:52, Steven Borg <steve@theborg.family> wrote:

I'm in the process of planning and installing a Hyper-9 motor at 154V with a battery bank of 48 280Ah 3.2V LiFePO4 batteries I received from China. The motor is rated to be plenty powerful to replace my 100 HP Diesel (which has been removed).  I'll keep everyone posted when it's installed.

In the meantime, I have a related question (maybe for ChristopherH?) around thrust bearings.  I've decided to use a belt drive (like the photos above, but for a single motor and gear.  But without the transmission I had planned on using (with integrated thrust bearings), I'm going to need to anchor the propshaft to the boat.  

Christopher, what inline thrust bearing did you use?  I'm trying to determine if I should build out a thrust bearing somewhere along the prop shaft, or whether I should integrate the thrust bearing into the engine mount, either before or after the belt pulley driving the shaft.  Also, if there's a pre-made thrust bearing for boats, I can't seem to find them (except large ones for giant ships). Does anyone know what they'd be called, so I can search for them.  (Yes, this is an embarrassing, totally newbie, question to ask, but I just can't seem to find them, so have been debating whether to just engineer my own from bearings off Granger or McMaster-Carr).

I'm not sure those questions even made sense, but that's where I'm starting...  Still trying to figure out the best way to get this done!  

This has been an amazing thread!  Thank you!