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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 » Mon May 14, 2012 3:40 pm

This thread kind of turned in to a haven for Hybridists; I'm not complaining either :D
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Unread postAuthor: Petitlu » Mon May 14, 2012 4:08 pm

the thread of 50 pages are not frequent?
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Unread postAuthor: MrCrowley » Mon May 14, 2012 4:39 pm

Not for a topic about a single cannon :wink:
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Unread postAuthor: Petitlu » Mon May 14, 2012 4:48 pm

ok!
'm flattered! :D

I hope you soon shoot your new art work Jack!
:lol:
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Unread postAuthor: jackssmirkingrevenge » Mon May 14, 2012 11:16 pm

Petitlu wrote:I hope you soon shoot your new art work Jack!


Just have to make the delrin sabot, it should be on its way to you some time this week :) please don't blow your collar bone off in the meantime!
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Unread postAuthor: Petitlu » Tue May 15, 2012 1:26 am

Excellent!
For shooting must be a good preparation, I will make a camera position diagrams, I can put 3.
I have no right to be wrong ...
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 1:52 am

Definitely, you only get one chance at this :)

By the way, how about some shotgun sabots? It would be nice to see some more buckshot rounds... but for science this time :D
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Unread postAuthor: Petitlu » Tue May 15, 2012 2:08 am

define exactly what it will shot, but the mix40 necessarily target material (profile?), camera angles ...
I will change the brake discs in my car, they are very thick and heavy, they could also serve as a target ...
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 2:10 am

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Unread postAuthor: Petitlu » Tue May 15, 2012 2:24 am

:D

tungsten could cross the entire disc ?
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 2:35 am

Petitlu wrote:tungsten could cross the entire disc ?


Only one way to find out :D

By the way, do you have access to smaller ball bearings than 8mm? Maybe 4.5mm bearings from BB guns?

Oh and look what I found!

http://www.ebay.com/itm/1-16-oz-Active- ... 1c08ba6b79

Ready pointed tungsten cores!

edit: you can get "bullet" shapes as well: http://cgi.ebay.fr/1-4-oz-Zappu-Tungste ... 1c08ba7a3f
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Unread postAuthor: Petitlu » Tue May 15, 2012 3:07 am

the smallest that I currently have is the 6mm
the 4.5mm can also be purchased ...
:wink:

I had seen these tungsten insert for fishing but not knowing the diameter, I have not bought ...
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 3:31 am

Petitlu wrote:the smallest that I currently have is the 6mm
the 4.5mm can also be purchased ...


6mm is good, I'll make you some decent cup sabots too :)


I had seen these tungsten insert for fishing but not knowing the diameter, I have not bought ...


I just bought some of these:

Image

They weigh 1.8 grams, so considering the density of tungsten and the dimensions from the picture I would say they are about 2.5mm diameter and 18.5mm long, quite tiny compared to what you've been using.

Something local: http://www.peche-leurre-evolution.com/a ... ,2150.html
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Unread postAuthor: Petitlu » Tue May 15, 2012 4:49 am

Thank you!
The 6mm is for discs?



the 7/64 oz are 3g, are they any better?
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 5:36 am

Petitlu wrote:Thank you!
The 6mm is for discs?


Eh?

I will make "cup" sabots so you can shoot multiple steel balls, proper buckshot style ;)

the 7/64 oz are 3g, are they any better?


This one?

Image

I've seen references to 18.2 g/cm<sup>3</sup> density. so that gives dimensions of about 2.6mm diameter and 28mm length, certainly these would not be as effective as the rods you're currently using - though technically they would fly out much faster.

As we've seen however, it's better to rely on slightly less velocity and more mass in order to avoid the projectile shattering.

On another note, have you ever heard of the "Blondeau" slug (balle Blondeau)?

Image

Image

The tail is not hollow, but apparently due to the shape it flies reasonably straight...

Image
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