www.pulse-jets.com

Tidbits Melde's Experiment with the Trevelyan Rocker "The usual explanation of the phenomenon is that the lead is heated as the iron strikes it, and throwing up little elevations, first at one and then at the other corner of the bolt, under thermic expansion, keeps the bolt in oscillation." https://...

Hi Mark, Happy '24! That paper was a good read. I think it suggests this works in a vacuum, correct? So, not a convection effect, but purely conductive, which makes some sense, where the heat bleeds out at the contact, which slightly contracts that side, which makes a teensy upward bow, that makes ...

This bell rings two notes at the same time
https://www.youtube.com/watch?v=FV4vhxCUsEY

I was interested in these speaker spikes for some experiments. If you watch from just before the 3 minute mark up to around the 7 minute mark it had some food for thought on coupling and filter effects, maybe of interest. Why You Want to Decouple Instead of Using Spikes for Vibration Control - AV Ro...

Some various modifications and food for thought
Sucking down on this cone makes it rise, and Feynman sprinkler
https://www.youtube.com/watch?v=ued2cEcfAio

Levitating pipe mystery solved
https://www.youtube.com/watch?v=z3scTRJCm7w

A simple design
Easter basket tensegrity sculpture
https://www.youtube.com/watch?v=s5-Wmkcp8h8

This little heat engine was cobbled together with simple parts and has an odd characteristic for creating motion. Finally something that runs well and not so fragile or fussy. Flame Driven Pendulum Rocker https://www.youtube.com/watch?v=eriiZBtj5SI PHILOSOPHICAL TRANSACTIONS "On the Vibrations and T...

Over here in communist frenchystan, if they sell it to you as propane, it's 100% propane (I checked the MSDS for my supplier, nothing special, this is supermarket forecourt stuff). There are small bottles of propane / butane mix sold for eg blowtorches, but they are marked as such. If you're runnin...

Hydraulic microphone
https://www.youtube.com/watch?v=gXAg1SHdPxE

Another thing that might be fun is if you could make a jam jar jet that could power a toy hovercraft. That is, have the craft jump up and down from the push of the exhaust while also taking in fresh air from around the skirt before the cycling stops. Here's something different than that but if someh...

360 grams is really good, I'm thinking. My approach was making a pulsepot helicopterish thing, but I could not get it to sustain: https://www.youtube.com/watch?v=mXgAOvkrOF4 That propellor attempt made me wonder if two ultralight mini thin metal jam jar jets on the tips of a propellor could lift of...

I toyed with that vertical takeoff thought too but didn't really have enough patience to keep trying. Some u-bend snorkels were tried to redirect the thrust downward and also thought given to somehow having the hole/exhaust face downward and feed the jam jar jet fuel differently. I like snorkels bec...

Mike that's a lot of research and "time" you've put into the project. Interesting history and methodologies. The magnetic induction brought to mind a viscous fluid resistance effect.

A meager display of a vibration induced spin I experienced. Stirling Hot Air Jumper with Odd Vibration Induced Spin Effect https://www.youtube.com/watch?v=AnM-8ql_HKM Related topics Cymatic Magnet Experiment ~ Frequency Induced Spin https://www.youtube.com/watch?v=RdRDEhaLFSI Vibration Induced Rotat...

Seems they could have done better.

Will this toy engine work at full size? (yes)
https://www.youtube.com/watch?v=a9tMjCwP-yI