Maple is what they recommend for wet service ie: hydroelectric turbines.
Thank you for taking the time to do that calculation. That is very helpful. I will try the cutlass style bearing and lubricate it with water from...
FYI This is the response from Woodex, the wooden bearing mfg: Thank you for your inquiry. One of the attributes of maple as a bearing material...
I wouldn't call it significant. The noise is annoying. And it can't be a good thing.
This shaft is a hybrid of two diameters and hollow and solid. The original shaft was 540mm long, 12.9mm diameter. I cut that shaft in half and...
That may be the solution, thanks. In a perfect world I would have the expertise to make a shaft with 0 runout. In reality I seem to be able to get...
I used a Lovejoy coupler with a urethane spider at the motor. I machined the splined crankshaft from the old engine and welded it into the...
My shaft is hollow. To extend the existing shaft I cut it and welded a seamless stainless steel tube to the ends. It is still a long skinny thing...
What an intriguing idea. I can't imagine that it would withstand 5000 rpm. At least not without lubrication. But maybe?
I like that idea though I have removed the water pump from the now electric motor. I did a little test yesterday and found that at 8 knots (the...
I lengthened the existing shaft. Runout is less than .010" but I guess that's enough to start a vibration at speed.
I have modified an outboard to have a very long shaft (for a hydrofoil). At motor speeds in excess of about 2000 rpm I get a vibration that I...
In this video I am accelerating to over 11 knots which has been the maximum speed the boat would go before losing lift and dropping. I was...
Yes. I think you are exactly right. We got some new video today that seems to show what you've described. I'll get it loaded shortly.
Or, in the case of this hydrofoil, we consume about 7hp at 11 knots.
Wow, good eye. I'm fairly certain I have inadvertently given you a red herring though. I'm going out tomorrow and will have my crack camera crew...
I'm no prop expert either but I don't think that's how it works. If the prop slip is say 10% how could the prop "pull" even that much water up to...
Check out the thumbnail in post#26
[MEDIA] This is what happens when I cut the power to the prop. This is what makes me believe that most, if not all, of the stern lift is coming...
Can someone tell me how to post a video here?
