Ok, I think I did the math properly. I finally tracked down a paper (Thank you Heimfried) by Newton and Rader who describe a series of propellers....
Waist high. That way you can still brace yourself while fishing, but can lean over to gaff a fish.
Yes, indeed. But it is my understanding that peak power is usually rated at or near max max RPM (5500 or so) while peak torque is usually quite a...
Another option is to use a 3 way ball valve. You can plumb it somewhere near the engine where the lines from the two tanks converge. You just swap...
Does anyone know where I can find data for the Gawn series? I have the following citation but can't seem to find it anywhere on the internet paid...
This is an unnecessarily combative reply. I did a calculation right there in the post and then qualified it with an "I think" because I...
Yeah. The duty cycle will only be about 10 minutes per hour, and I really don't care if I have to change the oil every 2 hours or something. I'm...
I'm converting a small gas outboard to high speed electric. Yes, a proper gear ratio would do it, but the outboards in the size range I need...
Hi there, I'm trying to figure out what generally causes lower unit failure with the goal of running a lower unit at higher than rated RPM. I get...
I don't see anything wrong your understanding. However, I don't know how much it really matters how you display the data as long as you understand...
Annoyingly, I picked a graph with the x axis reversed from what you would typically expect. Full speed is on the left, stall is on the right. My...
I have estimated drag of lifting surfaces and struts at 20 m/s (40 kn) as being 84 N (19lbs). This includes a rather poor estimation of the lower...
Thank you jehardiman for the comprehensive reply. I am designing this as an engineering exercise. It will be an unmanned hydrofoil, with a weight...
A combustion engine has a power curve that looks something like this (taken from Gerr's Propeller Handbook): [ATTACH] A brushless DC electric...
