www.pulse-jets.com

Cool. I’ve always wanted to make a biggish puttputt

Definitely looks like someone trimmed off the fins of a red head. I think we have plans here on the main site to resurrect the fueling and valve.

Hi Kevin, love that Chicago rolled metal cone calculator. Nice utility.

Welcome! Please let me know what links no longer work. The site was just updated last month for that very reason and they should all be working now.

Nothing in the "Looking for plans?" in the right size range?
The UK Gas Turbine Builder's Assoc. (GTBA) is a good resource. Been a while for me.

I don’t know what they might be used for, but McMaster had them and i bought some just because. I think you can relate!

Mark wrote: ↑

Thu Feb 08, 2024 5:47 pm

What sorts of things are the hollow bearing balls used for or what do you use them for? They sound like something nice to have for special projects.

Hmm, I have some hollow 1” bearing balls…

Maybe put a AA battery in a rocker, shorted with a high value resistor, so it heats until it dies? Or there are chem based hand warmers that might work. Sounds like it needs very little differential temp. Do you have an infrared thermometer to get a feel for the differential right before it stops wo...

Literally two days ago I did this setup with a bimetallic strip from a thermostat. I did not have the dial to know how much it moves with temperature, so I had to measure it.

This is very distracting, Mark!

Love the clockish one, thanks!

The continuous rotation, is that all you? The rockers were one thing, but this is amazing. I feel like it is convective action, but works in a vacuum, no?

Mark, that one is magical!

I think I would rather never be near one of those running.

I feel like it would also work with a straight cylinder that is imbalanced so it rocks on a flat plate. If my thoughts on thermal bow are correct... Seems you would want high thermal conductivity at the contact, and low emissivity of the rocker so it does not lose too much to the environment, and hi...