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Discussion Starter · #21 ·
This looks like it will pack a serious punch!
Won´t the turning action influence the flight of the rods in a bad way?
I think it has to be turned slowly?
Don't know about that. There will be some deviation, but the question is how much. The bolt will stay in the barrel for approximately one tenth of a second after the trigger has been pulled. If I turn that crank very fast, I might get one turn per second.Effective diameter is 25cm, circumference is 78,5 cm. Therefore the bolt will have travelled 7,85cm counter clock wise on its 2 meter long way through the barrel.

That counter clockwise turning will continue after the bolt has left the muzzle, but then again the bolt has a lot of air resistance sideways, and not very much in flight direction. So the air will reduce the turning effect.

My former gatling gun designs and also the minigun did not show a negative effect - and the minigun turned much quicker than one turn per second!

We shall find out.
 

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aka Whitehawk!
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That's just a really cool creation Joerg. Nice work.
 

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Discussion Starter · #23 ·
Have now finished all five barrels. That was a boatload of work.

8,5 meters of TBG full width on this monster...

It works! Will test it some more tomorrow, and make an "appetizer" vid.







Here you can see the "automatic piano" triggers:



 

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aka Whitehawk!
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Nice to finally see that bad boy in action! Great design, very high coolness factor :cool: It will be very interesting to see the SOG tipped bolts in the next video.
 

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That Baby needs to be painted red and mounted on the Back of your cute little Pickup^^
 

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Loudest boom on Earth
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Here is a pic of the bolts I use... made from a 30mm wooden rod and a "Spirit" from SOG. 354 gramms, very much front heavy.
This
is
wondeeerfuuul:eek::rolleyes:
Hi Jörg cold you please upload some detail pictures of the loop that attaches the bands in the front when loading? I wanna see how you attached the loops to TBG and what they are made of because It can be a good technique for attaching bands to forks of a very thin armed SS without bulky ends (like mine SSStake).

Also, how did you encase or attach the nails into the stakes? Curious.
 

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Discussion Starter · #30 ·
I just used the constriction knot to tie the bands to the loops.

Used a hand drill exactly the size of the nails (8mm) and hammered the nails in, very simple.
 

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With a 6-minute load time, does the first set of band loose strength?
Also, could you offset your trigger to the right, and make the bolts fire at the top of the rotation?

Brian
 

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Loudest boom on Earth
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I just used the constriction knot to tie the bands to the loops.
Used a hand drill exactly the size of the nails (8mm) and hammered the nails in, very simple.
OFC and then sharpened the other end..I am stupid :D Ty.
Nice! so now I have at least 5 "new" ways to attach bands to really thin forks. If only I could CAD or draw I would post them right away haha
 

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Zentripetalkraft?

That counter clockwise turning will continue after the bolt has left the muzzle, but then again the bolt has a lot of air resistance sideways, and not very much in flight direction. So the air will reduce the turning effect.
Pardon me, but the above is not likely to happen. Without any active
centripetal force the bolt would not spiral around the axis of the gun;
The bolt would just keep its velocity sideways; meaning that if the barrels
are turning one round per second, then every two tenths of a second a new
barrel is fired. And so 72° divided by two; 36° "offset" would appear.

Without having seen the vid i bet the bolts travel to the left (maybe 19:30h) when turned counter clockwise..
on the clock?!)- a heavy bolt is not that heavily affected by aerodynamics-

just my bet..

Greetings,

Be
 

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Discussion Starter · #34 ·
Seems like in real life, once on their way the bolts fly very straight. It took me 0,6 seconds to fire all five shots by the way.

Brian, the loss due to the cooling is easily compensated by more rubber, at least as long as it isn't very cold outside.

Yes, the release could be moved to the right until the bolts exit on the top position - but why? You can easily compensate by aiming a bit higher. As long as the shift is reproducible, no problem.
 

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Great work Joerg! It is probably a good thing that I do not have one of these. I could see myself missing a lot of work because I was too busy shooting things!
 

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Rubber is just like batteries I had an rc car that had 15 minutes in 20 degrees and then I used it in the snow and I only had half maybe even less.....

Bv translator: rc= remote controlled :D

J
 

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Discussion Starter · #37 ·
Have now made five "bolts" from the SOG spirit knives...

Did you notice that they even put my logo on the blades? :)

The enemy is already in place... video tomorrow.





 

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aka Whitehawk!
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Have now made five "bolts" from the SOG spirit knives...

Did you notice that they even put my logo on the blades? :)

The enemy is already in place... video tomorrow.
Can't wait for this one...

The bolts look awesome :cool:
 
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