Friction fire - pull-string drill V2 - 80% primitive

[2012 01 07]
This second version of the "pull-string drill" (yo-yo drill ? spinning top drill ?) is made only from natural material.

[not 100% primitive, because I used a knife, a file and even a power drill to shape the wood reel / bobbin, and I didn't make the thread myself (hemp thread bought from a store)].

In this version of the pull-string drill, I increased the diameter of the axis (using a reel / bobbin) where the thread is wound and the force of the thread is applied. This way, we can still produce a useful rotation [hence friction for the fire] when pulling the fragile thread only gently. I try also to exert only light pressure on the drill to ease the rotation and avoid breaking the thread. All these precautions give less friction, but it was enough to produce a coal.

[ok... everything was very dry, drill tip and fireboard were already charred by of previous unsuccessful attempts ...]

Material used :
- fireboard : lime / basswood
- drill : willow
- reel / bobbin : black elder wood (pith removed and enlarged)
- flywheel : unmodified naturally pierced flint nodule
- string : fragile hemp (commercial) thread
- handhold : limpet shell
- handle for the string : no handle necessary (pulling gently)
- coal extender : cattail fluff (collected late october)
- fuel : cattail fluff, wood curls (hazel), paper thin birch barck
- blow pipe : cane

Category:

Howto & Style

Tags:

• fuoco
• attrito
• fuego
• friccion
• feu
• Маховик
• volant
• d'inertie
• volante
• de
• inertia
• フライホイール
• 飛輪
• pedernal
• flint
• silex
• 発火法
• ヒモギリ紐錐
• огонь
• трением
• 独楽

[steintanz]

Ok, I see now: I stumbled into the realms of the primitive pros ... hope you will let me stay here for a little while ;o)

Really interesting to watch this - I am learning loads from you! Thanks.

[freejutube]

@steintanz

Thanks ;

very far from being or becoming a primitive pro... just playing for fun, and learning from experiments shared by others : thanks to everybody. And thanks to internet and social media ... :-) ... High tech helps primitive tech transfer !

[luth47]

Bravo, très cool celle ci aussi.

je me demande toujours comment vous faites pour calculer les pourcentages de techniques primitives...:)

[freejutube]

@luth47

% = estimation pifométrique à base de pure subjectivité primitive ! :-)

[Tossdart]

Another fine & wonderful tingy. Just to let you know. Someone has been here & watching.

[wanderinggibbon]

@freejutube Oh!, Ok, that sounds really cool; loads of revolutions, I wonder if you could use a harder wood than usual. Or at least it would be very quick.

[nikfeo]

Thanks! Cool video!

[AllergicHobbit]

Wow! You are very clever, my friend!! I must try this. Thanks!

[freejutube]

@wanderinggibbon

the spindle tip would be thinner than the part holding the string

(this would make the work as easy as with the bobbin)

[wanderinggibbon]

@freejutube Bigger surface area, more friction, more pull required, more tension on the string ... good luck.