Recent content by Jack of some trades

Is the heat generated by flowing water in a pipe proportional to the product of the rate of flow and the pressure drop across the section of pipe in question, analogous to an electrical circuit? If so, what units would you plug into get an answer in watts?

Oil burners I'm familiar with not only have an electric igniter but a motor that runs an oil pump and a blower to supply air for efficient combustion. I can believe the setup would take 750 watts. An oil-filled electric radiator would take more like 1500 watts. Yes, propane seems like a lot...

On a two-pole motor the start coils would be at 90°, but on a four-pole, opposite poles of the run coils appear every 90°. If I understand correctly, the start coils have to be in between the run coils, or at least that's how it appears on small fan motors.

Thanks. However, that's not quite the direction I was going. To rephrase the question: Does it require more phase shift to start a motor than to keep it running (on a capacitor-run motor), or does the amount of capacitance required for a given amount of phase shift vary with the RPM of the...

Long story short, on single-phase capacitor motors, large values of capacitance are used for starting and much smaller values are used for running. Yet it would seem that the amount of electrical phase shift needed is dictated and fixed by the physical relationship between the main and auxiliary...

Yes. Or better yet a fuse, and not slow blow one. Also, eye protection recommended if you go applying 1 KV to a glass component. Remember P = E**2/R.

Hi Phellippe, Is it possible to hook the motor back up to its original controller? Set it on high speed and it will develop all the torque it's capable of (not much). Then you can tell if it will have enough for whatever projects you have in mind. But if you can't hook it back up to the...

Both.

Hi, I am a 65-year-old disabled man with a background in electronics. Though I don't have a lot of ability with math or science, I do find them intriguing reminders that we inhabit a really cool universe.