Specific Impulse - Easy Way to Understand Jets and Rockets purdueMET 2020-03-26 | Specific impulse is a number that describes how efficiently jets and rockets use their fuel. It's easy to work with and is a good way to think about jets and rockets. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Disk on Ramp purdueMET 2023-04-01 | Calculating the acceleration of a disk rolling down a ramp or incline is easy if you learn the basic steps. I walk you through the problem, showing how to do the free body diagram and the equation of dynamic equilibrium (equation of motion). There's even a
Hand Made Guitar Sample purdueMET 2023-03-28 | This is a short demo of a guitar I made in 2018 in a class taught by Charles Fox. The guitar is a Grand Concert body and is made with select solid woods.
Centrifugal Force purdueMET 2023-03-05 | Here's a simple example of a spinning weight, hanging from a string. I go through the problem step-by-step.
Power Required for Level Flight purdueMET 2023-01-27 | It's easy to write an expression for the power required for level flight. Plotting it shows the speed for minimum power. I show where the expression comes from and do a sample calculation.
Calculating the Drag Polar purdueMET 2023-01-22 | The drag polar relates the lift of an airplane to its drag. It's easy to calculate if you have the right information
Acceleration, Velocity and Position in MATLAB purdueMET 2023-01-22 | It's easy to calculate velocity and position from acceleration using MATLAB. Here's a video showing how to do it both symbolically and numerically.
Calculating Stall Speed purdueMET 2023-01-20 | Every airplane has a minimum speed at which it can fly - stall speed. Calculating this speed is easy using the expression for lift. Here's an example.
Ping Pong Ball Drop - Non-Constant Acceleraton purdueMET 2023-01-17 | Not everything falls with constant acceleration. Ping pong balls are so light that drag matters. Here's an experiment showing they don't experience constant acceleration.
Forces on an Airplane in a Coordinated Turn purdueMET 2023-01-12 | Anyone who has flown on an airliner has experienced a coordinated turn, where the plane banks, but the force you feel is still perpendicular to the floor. Here's how that works.
Forces in Level Flight purdueMET 2023-01-10 | Airplanes in level unaccelerated flight have four forces that are in balance. That means the basic concepts from statics apply. Here's a simple description with some real model planes.
Solve Blocks in Mathcad Prime purdueMET 2022-10-29 | Solve blocks let you solve systems of equations easily in Prime 8. They are easy to use and robust.
Mathcad Prime - The Easiest Way to Calculate purdueMET 2022-10-12 | Mathcad Prime is the easiest way I know of to do technical calculations. It's a simple, intuitive math worksheet that can do both symbolic and numerical calculations.
Importing Images into MATLAB purdueMET 2022-10-06 | Digital images are just data and it's easy to import them into MATLAB. You can then edit images however you like, using basic mathematical operations.
Solving Equations with MATLAB using fsolve purdueMET 2022-09-14 | fsolve in MATLAB is a great way to solve systems of nonlinear equations, but you'll need to know how to write out the equations in the correct form. here's a video that walks you through the steps for using fsolve using anonymous functions.
Swirl Dipping Guitars purdueMET 2022-06-28 | Swirl dipping (hydro dipping) guitars is easy with the right materials and technique. This video was shot and edited by Tim Wilhelm of Kankakee Community College. It took place at a guitar making event that was part of the STEM Guitar Project (guitarbuilding.org) in June 2022.
Locating Center of Gravity - Statics purdueMET 2022-06-10 | It's easy to find the center of gravity of some object just by hanging it from a pin or piece of string. Here's how it works, with examples.
Three Numbers to Design A Guitar purdueMET 2022-06-08 | You can get started in designing a guitar with just three numbers: nut width, string spread at the bridge and scale length. I explain what these numbers are, how to use them and show example instruments I've made.
Why Boxes Tip - Statics purdueMET 2022-06-07 | Why do some boxes tip over while others don't? The center of gravity location is a big part of it. Here's a short video showing the basic idea.
Line Styles in 2D Plots - MATLAB purdueMET 2022-05-31 | It's easy to change line colors, weights and line styles for 2D plots in MATLAB. Here is a clear description with examples.
Where Has Mark Been? Doing Cool Guitar Stuff :-) purdueMET 2022-03-03 | I haven't posted any videos for a while because I'm away, working at Fender for a semester. I haven't forgotten all of you. I'll be back at Purdue in May and should start shooting videos again after that.
Section Modulus - Brain Waves purdueMET 2021-10-19 | Section Modulus is an easy way to relate area moment of inertia to maximum normal stress. Here's a short explanation of what section modulus is and how to use it.
Plotting Complex Functions in MATLAB purdueMET 2021-09-29 | It's easy to plot complex functions in MATLAB if you know the commands. Here's an example showing several ways to plot a complex function, exp(ix),.
A Hand Made Flamenco Blanca Guitar purdueMET 2021-09-26 | Here's a style of flamenco guitar called a flamenco blanca. I made it a few years ago and it turned out really well.
Failure in Double Shear - Brain waves purdueMET 2021-09-25 | Here's a really good example of a pin failing in double shear (picture at 7:12) along with a description and examples of both single and double shear.
Statics - What is a Moment? purdueMET 2021-08-27 | Moment is just the engineering name for a torque. Here's a simple explanation with some familiar examples.
Putting Ratio Tuners on a Taylor A12 purdueMET 2021-08-10 | I love my Taylor A12, but have wanted to fit it with Ratio tuners by GraphTech. Here's a video showing how to make the switch.
A Hand Made Lute Guitar purdueMET 2021-06-29 | Here's a small lute guitar I made. It has a 20 inch scale length and sounds bigger than it is.
Playing a Harmonic on a Guitar - High Speed Video purdueMET 2021-03-23 | This is a video by a student of mine named Brandon. He is playing a harmonic on the bass E string of an electric guitar.
High Speed Video of Guitar String - Bass E purdueMET 2021-03-23 | A high speed video of plucking the Bass E string on an electric guitar. This video is by a student of mine named Brandon.
Cutting Headstock by Hand purdueMET 2021-03-22 | You don't need an expensive bandsaw to cut a headstock of a guitar to shape. It's easy to cut one by hand with a small coping saw.
Method of Sections 2 purdueMET 2021-03-20 | Methods of Sections is a way to solve for only a few forces in trusses. It can be faster than Method of Joints.
Guitar Finish for Beginners purdueMET 2021-03-14 | The basics of what finish should go on a guitar. This is for beginning guitar builders who aren't sure where to start.
Centroid of L Shaped Plate - Brain Waves purdueMET 2021-02-19 | A centroid problem with a twist. We know the centroid location and need to find one of the dimensions. Check out the 400+ videos at the PurdueMET channel, youtube.com/PurdueMET
Proving the Pythagorean Theorem with Triangles purdueMET 2021-02-16 | Simple way to show that the Pythagorean Theorem is right, using four right triangles and a square. Check out the rest of the PurdueMET channel: youtube.com/PurdueMET
Plotting Multiple Surfaces in Mathcad purdueMET 2021-02-10 | How to plot surfaces for functions of two variables in Mathcad V15. It's easy to see where the surfaces intersect. Check out the rest of this channel at youtube.com/PurdueMET
Cart on Ramp 2 - Statics purdueMET 2021-02-05 | Finding the magnitude and angle of the force required to hold a cart statically on a ramp. Check out the rest of the PurdueMET channel at: youtube.com/PurdueMETNote: This is a corrected version of an earlier video. Like students, professors make mistakes sometimes...
Plotting Solutions to Matrix Equations purdueMET 2021-01-29 | The solution to a set of linear equations is the point where the planes all cross. Here's an example in MATLAB. Check out the PurdueMET channel at: youtube.com/PurdueMET
Statics - Cart on Ramp with Spring purdueMET 2021-01-28 | This is a cart on a 25 deg ramp and supported by spring. I show how to calculate compression of the spring. Check out the PurdueMET channel at: youtube.com/PurdueMET
Statics - Bar Suspended with a Cable purdueMET 2021-01-26 | How to apply statics to find tension in a cable supporting a bar carrying a weight. Check out the PurdueMET channel at: youtube.com/PurdueMET
Finding Roots and Bisection Method purdueMET 2021-01-24 | A short explanation of what roots are and how to find them using a simple algorithm called bisection or binary search. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Where to Buy Guitar Parts - The Fret Board purdueMET 2020-12-13 | There are so many places to buy parts, tools and materials for guitars that it can be hard to know where to start. Here are four vendors I've had good experiences with. There are other good ones, but these will get you started.Note: These are just my opinions. I have no connection with these companies and my opinions are not necessarily those of my employer.
Statically Indeterminate Structures - Brain Waves purdueMET 2020-11-30 | Some structures can't be analyzed only using statics. Here's an experiment and an analysis showing why the structure is statically indeterminate. Check out the PurdueMET channel at: www.youtube.com/PurdueMET
Whats a Function? - Brain Waves purdueMET 2020-11-29 | Functions can be confusing because they are abstract. But, not when you 3D print one. Here's a function made real. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Block Stacking Magic? - Brain Waves purdueMET 2020-11-28 | It's possible to make a stack of blocks so that the top one extends out past the bottom one. Magic? No, just statics :-) Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Poissons Ratio - Brain Waves purdueMET 2020-11-13 | Poisson's Ratio helps describe how materials deform when loaded. Here's a simple explanation with a physical example. Note: at about 6:05 the relationship between elastic modulus and shear modulus should be E=2G(1+v). I mistakenly wrote it as E=2G(1-v). My apologies.
Curve Fitting with CFTOOL - MATLAB for Non-Believers purdueMET 2020-11-12 | CFTOOL is a handy interactive curve fitting tool in MATLAB - akin to 'Add Trendline' in Excel, but more powerful. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
What is Elastic Modulus? purdueMET 2020-11-11 | Elastic modulus describes the stiffness of a structure due to the material. Here's a clear explanation and an example. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Load-Shear-Moment Diagram w/ Constant Distributed Load 2 purdueMET 2020-11-10 | Here's how to draw the Load Shear Moment diagram of a cantilever beam with an upward uniform distributed load - kind of like the wing on an airplane. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Area of a Circle using Integration - Brain Waves purdueMET 2020-11-02 | Here are two different ways to find the area of a circle using integration. The first uses rectangular coordinates and the second uses polar coordinates. Check out the whole PurdueMET Channel at: www.youtube.com/PurdueMET
Beam Sign Convention - Brain Waves purdueMET 2020-10-30 | The beam sign convention (or designer's sign convention) is used to draw shear moment diagrams. Here's simple explanation of how it works.
