Differences between revisions 1 and 20 (spanning 19 versions)

Guillotine: Eddy Current Braking, 5K20.20

Location: Floor Item Room 2237.

Description:

The large copper blade of the Guillotine is released from a height of 7 feet 10 inches. Strong magnets are placed about a foot above the chopping block. These magnets are strong enough to slow the blade to almost a stop with induced eddy currents within the copper blade.

The Guillotine with base is 10' 4" tall, 15.5" wide, and 1.5" thick. The base is 23" x 23" x 28".

The blade is 1/4" thick and is 12" by 11.75" on long side and 12" by 9.75" on the short side. It is pure copper and its weight is 818.5 grams.

The Magnets: The bar of magnets are very strong and came from an very old computer hard drive. We got them for about $20 each from American Science Surplus many years ago. They have magnetic field strength of about 4.5 Kilogauss at the surface, about 3.0 Kilogauss one quarter inch away, and 2.5 Kilogauss on the other side of the copper blade, about 3/8 of an inch from the surface. The average magnetic field strength within the 1/4 inch thick copper blade is about 2.75 Kilogauss. The blue parts are the North Poles and the Red are the South Poles.

Equipment	Location	ID Number

Guillotine	EM Floor Item	5K20.20
Guillotine Magnets	EM, with Guillotine
Guillotine Base	EM, with Guillotine

Important Setup Notes:

Bring in some vegetables (Carrots, Zucchini, Cucumber work well) to chop

Setup:

A screwdriver is needed to fasten the upper part of the Guillotine to its base.
Make sure the cord for the blade is untangled.
Test the blade release.

Cautions, Warnings, or Safety Concerns:

The blade is NOT sharp but is beveled.
Blade WILL cause bodily harm (without the magnets).
Keep all body parts out of the way of the blade once the blade is lifted out of its holder.
The magnets are strong enough to wipe out credit cards.
Demonstration may require practice.






Movie: Guillotine.mp4 89.3MB	Movie: Guillotine.rm	Movie: Guillotine.wmv 47.5 MB

References:

Wikipedia

Home

-  ⇤ ← Revision 1 as of 2010-10-15 18:28:56 → 
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-||<:30%>[:PiraScheme#Mechanics: Table of Mechanics Demonstration]||<:30%>[:MEEquipmentList: List of Mechanics Equipment & Supplies]||<:30%>[:Demonstrations:Lecture Demonstrations]||
+||<:30%>[[PiraScheme#ElectricityAndMagnetism| Table of Electricity and Magnetism Demonstration]]||<:30%>[[EMEquipmentList| List of Electricity and Magnetism Equipment & Supplies]]||<:30%>[[Demonstrations|Lecture Demonstrations]]||
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- * '''Cabinet:''' [:MechanicsCabinet:Mechanic (ME)], Waves & Sound (WS)....
 * '''Bay:''' (A? or B?) Like [:MechanicsCabinetBayA1:(A1)]
 * '''Shelf:''' #1,2,3.. (Use "T" for items that are on top of that cabinet bay)
+Floor Item Room 2237.
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+Line 9:
-(attachment photo showing the fully set up demonstration)
+{{attachment:Guillotine-28-400.jpg}}
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-Insert description of apparatus, its component, what it is demonstrating.
+The large copper blade of the Guillotine is released from a height of 7 feet 10 inches. Strong magnets are placed about a foot above the chopping block. These magnets are strong enough to slow the blade to almost a stop with induced eddy currents within the copper blade.

The Guillotine with base is 10' 4" tall, 15.5" wide, and 1.5" thick. The base is 23" x 23" x 28".

The blade is 1/4" thick and is 12" by 11.75" on long side and 12" by 9.75" on the short side. It is pure copper and its weight is 818.5 grams. 

The Magnets:
The bar of magnets are very strong and came from an very old computer hard drive. We got them for about $20 each from American Science Surplus many years ago. They have magnetic field strength of about 4.5 Kilogauss at the surface, about 3.0 Kilogauss one quarter inch away, and 2.5 Kilogauss on the other side of the copper blade, about 3/8 of an inch from the surface.  The average magnetic field strength within the 1/4 inch thick copper blade is about 2.75 Kilogauss. The blue parts are the North Poles and the Red are the South Poles.
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-||apparatus||ME, Bay B1, Shelf #2|| ||
||all other parts||ME, Bay B1, Shelf #2|| ||
||...||ME, Bay B1, Shelf #2|| ||
||Possible supplies that are needed||Rode and Tack Cabinet|| ||
||...|| In Lecture Halls|| ||
||...|| Stock Cabinet || ||
||...|| Stock Cabinet || ||
+||Guillotine||EM Floor Item||5K20.20 ||
||Guillotine Magnets||EM, with Guillotine|| ||
||Guillotine Base||EM, with Guillotine|| ||
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+Line 28:
-'''''Important Setup Notes:''''' 
 A.  '''''This demonstration requires a minimum 24 hour notice.'''''
 *  '''''This demonstration requires LN2'''''
 *  '''''Back-to-Back lectures is NOT possible; We'll do one lecture one day and the other the next day.'''''
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+Line 29:
+'''''Important Setup Notes:'''''  
 A.  '''''Bring in some vegetables (Carrots, Zucchini, Cucumber work well) to chop'''''
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+Line 34:
-. Make a Setup check list.
 1. ...
+. A screwdriver is needed to fasten the upper part of the Guillotine to its base.
 1. Make sure the cord for the blade is untangled. 
 1. Test the blade release.
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-. List any Warnings....
 1. Demonstration may require practice.
+. The blade is NOT sharp but is beveled. 
 2. Blade WILL cause bodily harm (without the magnets).
 3. Keep all body parts out of the way of the blade once the blade is lifted out of its holder. 
 4. The magnets are strong enough to wipe out credit cards.
 5. Demonstration may require practice.
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-'''Demonstration:'''
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-Insert description of demonstration, how is the demonstration preformed.
+||{{attachment:Guillotine-02-250.jpg}}||{{attachment:Guillotine-03-250.jpg}}||{{attachment:Guillotine-04-250.jpg}}||{{attachment:Guillotine-05-250.jpg}}||
||{{attachment:Guillotine-06-250.jpg}}||{{attachment:Guillotine-07-250.jpg}}||{{attachment:Guillotine-09-250.jpg}}||{{attachment:Guillotine-10-250.jpg}}||
||{{attachment:Guillotine-11-250.jpg}}||{{attachment:Guillotine-12-250.jpg}}||{{attachment:Guillotine-13-250.jpg}}||{{attachment:Guillotine-14-250.jpg}}||
||{{attachment:Guillotine-15-250.jpg}}||{{attachment:Guillotine-16-250.jpg}}||{{attachment:Guillotine-20-250.jpg}}||{{attachment:Guillotine-24-250.jpg}}||
||{{attachment:Guillotine-21-250.jpg}}||{{attachment:Guillotine-26-250.jpg}}|| || ||
|| ||Movie: [[attachment:Guillotine-2.mp4|Guillotine.mp4]] 89.3MB|| Movie: [[attachment:Guillotine-2.rm|Guillotine.rm]] ||Movie: [[attachment:Guillotine-1.wmv|Guillotine.wmv]] 47.5 MB||
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-||attachment other photos||attachment other photos||
||attachment other photos||attachment other photos||
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+Line 58:
-. List any references
+. [[http://en.wikipedia.org/wiki/Guillotine|Wikipedia]]
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+Line 61:
-[:Instructional:Home]
+[[Instructional|Home]]

fw: Diff for "Guillotine"

Guillotine: Eddy Current Braking, 5K20.20