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Hybrid ThorJack

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Unread postAuthor: MrCrowley » Wed Apr 25, 2012 2:36 am

Petitlu wrote:caoutchou
DO NOT search this in Google images :shock:
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Unread postAuthor: Petitlu » Wed Apr 25, 2012 2:41 am

caoutchouc - rubber ...

Excellent, I'm laughing!

:lol: :lol:
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Unread postAuthor: jackssmirkingrevenge » Wed Apr 25, 2012 3:05 am

MrCrowley wrote:DO NOT search this in Google images :shock:


jesus...

Image

WE DIDN'T LISTEN!
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Unread postAuthor: Petitlu » Wed Apr 25, 2012 6:02 am

:P

Tomorrow I have to go collect a parcel at the post, I think it is the tungsten rods, I hope!
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Unread postAuthor: jackssmirkingrevenge » Wed Apr 25, 2012 6:06 am

oooh! hope so too :D have you fired it at 40x mix? How is the spark plug holding up?
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Unread postAuthor: Petitlu » Wed Apr 25, 2012 6:24 am

Not yet at Mix40, but the spark plug is not damaged at Mix30 and works very well!
:lol:
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Unread postAuthor: RJB INDUSTRIES » Wed Apr 25, 2012 7:06 am

jackssmirkingrevenge wrote:You need something to keep it centred while in the barrel (like the two front halves of the arrow sabot I made)


What have you made to center the ammo while inside the barrel?



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Unread postAuthor: Petitlu » Wed Apr 25, 2012 7:19 am

a sabot delrin
a sabot in several parts
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Unread postAuthor: jackssmirkingrevenge » Wed Apr 25, 2012 7:20 am

RJB INDUSTRIES wrote:What have you made to center the ammo while inside the barrel?


This is for an arrow, the rear fits into the hollow part of the cylindrical sabot, while the front halves go over the front part of the arrow to keep it centred.

Image

For this style, the projectile fins are the same diameter as the barrel so no need to keep it centred, all it needs is a disk to push it.

Image
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Unread postAuthor: RJB INDUSTRIES » Wed Apr 25, 2012 8:57 am

Can you show me the arrows you use?


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Unread postAuthor: Petitlu » Wed Apr 25, 2012 9:02 am

they are simple arrows bow ...
Sectional diagram of Thorjack:

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Unread postAuthor: RJB INDUSTRIES » Wed Apr 25, 2012 9:41 am

Nice, you have used what mixes?


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Unread postAuthor: Petitlu » Wed Apr 25, 2012 9:49 am

Thank you!
I fire up to Mix30
and in the week I will do number of shots at Mix40.
Mix40 at no more as the chamber pressure is 300 bar ... this is the limit
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Unread postAuthor: RJB INDUSTRIES » Wed Apr 25, 2012 9:54 am

Pretty cool....
The explosion reach what pressure?


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Unread postAuthor: Petitlu » Wed Apr 25, 2012 10:00 am

yes, the pressure is 303bar in the explosion!
you have seen the videos?
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