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45CommentsKypros (Zypern, Chypre)Joined October 4th, 2010
Greek history, Ancient, Byzantine and Modern. Greek literature. Reading. Writing. Constructing things. Summer, camping. How to make a boat?
  • Mastros commented on jprussack's instructable How to Dry a Cell Phone1 year ago
    How to Dry a Cell Phone

    Turning the telephone at the end of a string creates a current of wind, like a fan blowing cool air in summer. So, the relevant aspect is speed, not acceleration.

    For your calculations and almost all of your conversions into various units, you may want to try this calculator:https://www.eeweb.com/tools/calculatorIf I remember correctly, you need to register first for the calculator to appear, but it is free.It is a very rich and very well designed calculator. You just start typing a measure, say a length, and the calculator starts showing the conversion in many other units.There are many constants, and some formulas available.-- ==) * (== --For the specific case mentioned in the instructable:To find the speed, we need to calculate the distance covered by 38 revolutions in 16 seconds. So:speed = 2*pi * 4 feet * 38 / (16 seconds) = 59,6902 feet/secondWe clock on the tab at the right of the calculator, which reveals the conversion plate. Then we cl...

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    For your calculations and almost all of your conversions into various units, you may want to try this calculator:https://www.eeweb.com/tools/calculatorIf I remember correctly, you need to register first for the calculator to appear, but it is free.It is a very rich and very well designed calculator. You just start typing a measure, say a length, and the calculator starts showing the conversion in many other units.There are many constants, and some formulas available.-- ==) * (== --For the specific case mentioned in the instructable:To find the speed, we need to calculate the distance covered by 38 revolutions in 16 seconds. So:speed = 2*pi * 4 feet * 38 / (16 seconds) = 59,6902 feet/secondWe clock on the tab at the right of the calculator, which reveals the conversion plate. Then we click on the button "speed", from the buttons at the lower part. We write or transfer this number 59,6902 to the appropriate box for "feet/second", and the calculator automatically converts it to many other units. In particular:speed = 40,6979 miles / hour** ** ** **In the international system, the separator for decimal digits is a comma, "," , not a dot.

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  • Mastros commented on gravityisweak's instructable Coat Hanger Drill Bit2 years ago
    Coat Hanger Drill Bit

    Very nice idea!! Excellent tool in just the right price!!It should be possible to stabilize a long piece of wire in the following way:-- sandwich a part of the length, say 5 or 10 centimetres (2 or 4 inches) within two pieces of wood.-- then sandwich the next part of length in another two pieces of wood, this time placing them vertical to the previous two.-- continue like this untill you cover the whole length of the wire.When you look at the wire from its axis, the pairs of wood should look like a cross.You will also have to construct some support to keep the pairs of wood in place.Each pair will prevent the wire from wobbling in one direction. The pair after it will prevent it from wobbling in a direction verical to the previous one. In all, the wire should turn straight without any w...

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    Very nice idea!! Excellent tool in just the right price!!It should be possible to stabilize a long piece of wire in the following way:-- sandwich a part of the length, say 5 or 10 centimetres (2 or 4 inches) within two pieces of wood.-- then sandwich the next part of length in another two pieces of wood, this time placing them vertical to the previous two.-- continue like this untill you cover the whole length of the wire.When you look at the wire from its axis, the pairs of wood should look like a cross.You will also have to construct some support to keep the pairs of wood in place.Each pair will prevent the wire from wobbling in one direction. The pair after it will prevent it from wobbling in a direction verical to the previous one. In all, the wire should turn straight without any wobbling.As you drill through, you will remove one pair of woods to expose a length of wire.Well, I actually have'nt tried this suggestion yet, but I believe...., it should work perfectly!!

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  • Mastros commented on jberry15's instructable How To Make A Bug out Bag3 years ago
    How To Make A Bug out Bag

    Me thinks..."Unfriendlies"?!! "Be prepared"?!! For what? in case of an invasion? Well, which country do you live? Invasions dont happen suddenly, like rainstorms happen in some countries. A proposal: If you are worrying for a foreign invasion, the correct thing to do is to tell other people, discuss it with them and... But you can't worry for an invasion without a specific reason. It is silly, and naive. It is more telling for you rather than the political conditions.A proposal: If you are worrying for an invasion, act politically, tell other people and suggest that the country should prepare. **The country should prepare**, with all the many, or few, resources available to the state. Not one person completely separated from the others and in a selfish way. Again, th...

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    Me thinks..."Unfriendlies"?!! "Be prepared"?!! For what? in case of an invasion? Well, which country do you live? Invasions dont happen suddenly, like rainstorms happen in some countries. A proposal: If you are worrying for a foreign invasion, the correct thing to do is to tell other people, discuss it with them and... But you can't worry for an invasion without a specific reason. It is silly, and naive. It is more telling for you rather than the political conditions.A proposal: If you are worrying for an invasion, act politically, tell other people and suggest that the country should prepare. **The country should prepare**, with all the many, or few, resources available to the state. Not one person completely separated from the others and in a selfish way. Again, this is more telling about the width and the depth of your political perceptions, rather than informative about the real world.A proposal: Act politically: this means: -- speak publicly: articles in newspapers, the internet, speak to a radio, etc-- act publicly: call for a public meeting and present your case. If you find many people, organize a demonstration. Propose to organize a group, an organization.In the US, more than elsewhere, "be prepared" its just a silly playground, a replacement and a first naive step in the absence of any other political thought.

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