Comments by "TheEvertw" (@TheEvertw) on "Integza" channel.

  1. 9:19 Neckties and powerful motors do not combine well. Some workshops I know have scissors hanging at the ready just for cutting off the tie of any manager who was dumb enough to enter wearing one. One even had a hall of fame (shame?) where they put the ties they cut off. I'd hate for your channel to terminate because your neck was broken when your tie got caught. I wouldn't mind for some of those managers, (except for having to clean up), but you are far too precious.
    2
  2. To protect your camera, have it look at the jet engine via a mirror. Same way they protect high-speed camera's photographing incoming bullets.
    1
  3. Well done, Integza! We saw it work.
    1
  4. "I don't know why I always go on until the project goes bad" As Mythbusters used to say: If something is worth doing, it is worth overdoing ;-)
    1
  5. Real jet engines use the actual fuel as coolant. Has the side-benefit that it pre-heats the fuel so it burns easier.
    1
  6. Looks like your impeller only outputs a fraction of the volume of air compared to the regular fan. Also, the shape of your impeller is optimized for when the engine is moving fast through the air. While stationary, it will not accelerate the air efficiently: the steep starting angle of the blade forces the air to accelerate very quickly when stationary, causing a large drop in pressure behind the blade that slows it down and wastes a lot of energy through eddie flows. In fact, the impeller is designed to maintain pressure whilst simultaneously slowing the air down, the opposite of what you want to achieve in your bench test, as you want to accelerate air. That is why you also see this configuration in turbines where water flow is converted into electrical energy. When stationary, the fan might be more efficient when you run it in reverse.
    1
  7. Encasing a hobby rocket engine with a metal case is NOT the safest thing to do. Shrapnel travels a long distance at lethal speeds. Try cardboard cylinders, it is what my chemistry teacher who was also into rocket engines recommended (in 1984), and also what is used in fireworks. I am sure they have a good reason for that.
    1
  8. Well done demonstrating what will happen when you dry gun cotton in an oven. You could have explained it, but a demonstration is much more effective.
    1