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William Fraser
Registrace 11. 06. 2013
Boating, Fishing, Flying and other passions.
Graphite levitation, magnets, laser and ultrasound
The experimentation continues. Diamagnetism appears to be more complicated than simple magnetic repulsion.
Laser projection through a drop of water containing suspended graphite.
Breaking graphite flakes with ultrasound.
Controlling graphite flakes with a rotating magnetic field.
Laser projection through a drop of water containing suspended graphite.
Breaking graphite flakes with ultrasound.
Controlling graphite flakes with a rotating magnetic field.
zhlédnutí: 13 768
Video
Graphite, Amps and Magnets
zhlédnutí 745Před 2 měsíci
Rheoscopic fluid MHD - Magnetohydrodynamics with suspended graphite flakes. Testing the effect of graphite on water conductivity.
Graphite and water - Now add magnets!
zhlédnutí 122KPřed 4 měsíci
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...
New (?) idea for differential gears
zhlédnutí 1,9KPřed 5 měsíci
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.
Magnetic Multistage Gear: Compound Differential
zhlédnutí 2,9KPřed 6 měsíci
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...
Hull design for MHD boats
zhlédnutí 1,6KPřed 8 měsíci
A performance comparison between the Yamato 1 magnetohydrodynamic ship and other hulls.
Magnetohydrodynamic propulsion - external flux design
zhlédnutí 2,5KPřed rokem
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 Tesla coil with only three components!
zhlédnutí 342KPřed rokem
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.
Strange Magnetohydrodynamic propelled boat smashed speed expectations.
zhlédnutí 47KPřed rokem
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...
Magnetohydrodynamic drive - RC Model Boat
zhlédnutí 4,5KPřed rokem
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.
Kayak Trolling Motor Test - more airplane props
zhlédnutí 3,3KPřed rokem
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.
zhlédnutí 6KPřed rokem
Converting RC Toy boat parts to high power magnetohydrodynamic drive.
Watersnake 24V Brushless trolling motor, 95lb.
zhlédnutí 13KPřed 2 lety
Watersnake 24V Brushless trolling motor, 95lb.
Minn Kota Project Ep.3: Skinny props Rule!
zhlédnutí 8KPřed 3 lety
Minn Kota Project Ep.3: Skinny props Rule!
Super simple MHD boat drive, great results.
zhlédnutí 138KPřed 3 lety
Super simple MHD boat drive, great results.
Minn Kota Project Ep.2. Modifications and range test
zhlédnutí 2,4KPřed 3 lety
Minn Kota Project Ep.2. Modifications and range test
Minn Kota Project Ep.1: Speed and power test
zhlédnutí 3,1KPřed 3 lety
Minn Kota Project Ep.1: Speed and power test
Electric Paddle: This tiny motor propels my kayak!
zhlédnutí 45KPřed 3 lety
Electric Paddle: This tiny motor propels my kayak!
Solar panel motor test - Facing the sun vs flat
zhlédnutí 611Před 3 lety
Solar panel motor test - Facing the sun vs flat
Poly vs Mono: Small solar panel test and temperature response.
zhlédnutí 622Před 3 lety
Poly vs Mono: Small solar panel test and temperature response.
Model Aircraft propellers - UNDERWATER?
zhlédnutí 9KPřed 4 lety
Model Aircraft propellers - UNDERWATER?
Joule thief circuit. Incredible voltage boost with vintage transistor.
zhlédnutí 21KPřed 4 lety
Joule thief circuit. Incredible voltage boost with vintage transistor.
Joule Thief - Peltier powered Head Torch.
zhlédnutí 3,7KPřed 4 lety
Joule Thief - Peltier powered Head Torch.
Magnetic gears : Axial drivetrain proof of concept
zhlédnutí 309KPřed 4 lety
Magnetic gears : Axial drivetrain proof of concept
DIY Solar Maximum Power Point Oscillator
zhlédnutí 2,1KPřed 4 lety
DIY Solar Maximum Power Point Oscillator