Science presentation

In my science class in my Bachelor of Education degree I had to put together a science unit. Mine covered forces, friction, and simple machines. For the presentation we have to do a demo and I saw this as an opportunity to use a firebow in the classroom! seriously! It is a simple machine, it uses different kinds of forces on the spindle, and produces friction that makes smoke and fire. It made me think of you guys so I had to post something. I present tuesday, i'l report how it went.

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Never explain. Your friends don't need it and your enemies won't believe you anyway.

Daffy wrote:

In my science class in my Bachelor of Education degree I had to put together a science unit. Mine covered forces, friction, and simple machines. For the presentation we have to do a demo and I saw this as an opportunity to use a firebow in the classroom! seriously! It is a simple machine, it uses different kinds of forces on the spindle, and produces friction that makes smoke and fire. It made me think of you guys so I had to post something. I present tuesday, i'l report how it went.

That's great Daffy. You really feel like you've accomplished something when you use the bowdrill. I'm sure everyone else will be impressed too. Razz

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Show them the simple wisdoms of the woods Daffy Wink

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We only have one Earth, take care of her and she will take care of you. ~ probably someone else

That's awesome Daffy! Very Happy

I'll bet you get an A+. Cool

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Iron sharpeneth iron; so a man sharpeneth the countenance of his friend. - Prov. 27:17

good luck and let us know how it went Very Happy

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I just heard something big crack�.. holy crap!-Les Stroud

when i built my firebow two day s before class I couldnt get it to work well, got really frustrated and started over. My spindle was too short. I then switched to the hand drill method which worked really well in the class. I got smoke and a pile of ash in seconds and then stop'd as to not burn the chair that the ash was funniling on to. I then used a much larger spindle and was able to tighten the bow up a lot more which also yielded a great result. Was a very successful lesson. The proff really liked it as he has done the bow drill before but not the hand drill. Was a great success! I'l put vids up of the hand drill and bow drill once i get home on the 24th.

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Never explain. Your friends don't need it and your enemies won't believe you anyway.

That's great, Daffy! Very Happy

Good job.

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Iron sharpeneth iron; so a man sharpeneth the countenance of his friend. - Prov. 27:17

Good job!

That sounds like a bow drill to me, finicky! Razz

The spindal has to be perfectly straight, socket deep enough, and string nice and tight. And after all that you have to have the right woods. Shocked

Once you have a good set it takes you two minutes. Very Happy

Never tried hand drill though. I'll have to try it soon.

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Good job, Daffy! I can't wait to see those videos Very Happy

eric

Bow Drill is awesome, but Hand Drill is just as good, only problem is it sucks until you develop the callouses and takes you forever until you develop the technique...but both with time I guess Very Happy

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We only have one Earth, take care of her and she will take care of you. ~ probably someone else

	Brian wrote:
	Bow Drill is awesome, but Hand Drill is just as good, only problem is it sucks until you develop the callouses and takes you forever until you develop the technique...but both with time I guess

Lucky for me my hands (i supose it's luck in this case anyway) my hands are callused up at the top of my palms....

	Mystik Spiral wrote:
	Good job! That sounds like a bow drill to me, finicky! Razz The spindal has to be perfectly straight, socket deep enough, and string nice and tight. And after all that you have to have the right woods. Shocked Once you have a good set it takes you two minutes. Very Happy Never tried hand drill though. I'll have to try it soon.

For the sake of the demonstration I used store bought materials (hardwood dowel, softwood base, hardwood block.) I was satisfied with the results. The hand drill was about 36 inches long (a yard) and was plenty long to get a good amount of heat produced.

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Never explain. Your friends don't need it and your enemies won't believe you anyway.

I've messed around with the hand drill some, and you guys are right. It sucks until you develop calluses. Mad

It's kind of like playing guitar for the first time. It takes a while for it to become second nature to you.

Congrats again, Daffy. Cool

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Iron sharpeneth iron; so a man sharpeneth the countenance of his friend. - Prov. 27:17

Daffy wrote:

	Mystik Spiral wrote:
	Good job! That sounds like a bow drill to me, finicky! Razz The spindal has to be perfectly straight, socket deep enough, and string nice and tight. And after all that you have to have the right woods. Shocked Once you have a good set it takes you two minutes. Very Happy Never tried hand drill though. I'll have to try it soon.

For the sake of the demonstration I used store bought materials (hardwood dowel, softwood base, hardwood block.) I was satisfied with the results. The hand drill was about 36 inches long (a yard) and was plenty long to get a good amount of heat produced.

I cheated too. Laughing

I used a peice of trim for my socket, and used a pine board for my baseboard. But my spindal, and bow was maple from my yard.

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great work there Very Happy

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I just heard something big crack�.. holy crap!-Les Stroud