Video

Rheoscopic fluid MHD - Magnetohydrodynamics with suspended graphite flakes. Testing the effect of graphite on water conductivity.

A simple educational tool in fluid dynamics. Graphite flakes make a beautiful rheoscopic fluid. The flakes also react to a magnetic field, aligning with the field direction. Combine these two phenomena and you can produce interesting flow models and even streamlines around objects like cylinders and airfoils. Cylinders produce the well known Von Karman vortex patterns. Chapters: 0:40 Magnetic e...

I demonstrate a 3D-printed model of a magnetic rear differential and explain how it works. I also show how magnets can be used to achieve limited slip and diff-lock capability. Also demonstrated is a magnetic diff with 60/40 torque split.

An unusual multistage magnetic gear with 3D printed parts, Neodymium magnets and brushless motor. The reduction ratio is much higher than a typical series multistage gear with similar stage ratios. A speed and torque analysis reveals large amounts of power circulating back and forth between gear stages. The analysis shows that the use of Newton's 3rd law in magnetic free body diagrams differ fr...

A performance comparison between the Yamato 1 magnetohydrodynamic ship and other hulls.

A crash-course in momentum theory, forces and pressures in an MHD duct and a closer look at the magnetohydrodynamic propulsion of my model boat, "MHD 1.1".

A simplified version of the Slayer Exciter solid state Tesla coil using only a 10F supercapacitor, a 2N3904 npn transistor and an 85 turn coil. It requires an electromagnetic pulse to start resonating at very high frequency. The larger model uses a 2N2222 transistor.

A chubby radio controlled boat with counterintuitive design sets its sights on outperforming a slender research catamaran. MHD 1.1 specs: Length - 335mm Beam - 130mm Displacement - 950g. Efficiency - I'd rather not say. Catamaran specs: Length - 500mm Displacement - 915g More on the catamaran design can be found in the PLOS journal article "Experimental and theoretical study of magnetohydrodyna...

RC model boat with external magnetohydrodynamic drive. Length: 335mm (1.1ft) Displacement: 950g 3s and 6s Lipo batteries. More detailed videos of the design and build will follow soon.

The motor now mounts on the stern and can be lifted by tilting it forward. It steers with the rudder pedals. I demonstrated the kayak at a solar boat race. Scholars were provided with solar panels and trolling motors and had to build their own boats from extruded polystyrene. In the spirit of the event I limited myself to only the use of a buck converter, no battery and no MPPT. I tested two ne...

Converting RC Toy boat parts to high power magnetohydrodynamic drive.

Watersnake 24V Brushless trolling motor, 95lb.

Minn Kota Project Ep.3: Skinny props Rule!

Super simple MHD boat drive, great results.

Minn Kota Project Ep.2. Modifications and range test

Minn Kota Project Ep.1: Speed and power test

Electric Paddle: This tiny motor propels my kayak!

Cool solar panel hack - Tested.

Solar panel motor test - Facing the sun vs flat

Poly vs Mono: Small solar panel test and temperature response.

Model Aircraft propellers - UNDERWATER?

Joule thief circuit. Incredible voltage boost with vintage transistor.

Joule Thief - Peltier powered Head Torch.

Borzoi puppy days

Cracking open a thermite egg.

Magnetic gears : Axial drivetrain proof of concept

Custom Mora knife handle

DIY Solar Maximum Power Point Oscillator

DSLR video with a Six inch Telescope