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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: POLAND_SPUD » Wed Mar 21, 2012 11:49 am

jackssmirkingrevenge wrote:
POLAND_SPUD wrote:I saw them somewhere and I thought 'damn these would be useful for an ignition module when I eventually get round to building my own hybrid in 2073'


:D

Damn I wish it was as easy as you say - don't worry now I have some spare time but my fridge compressor has broken down... guess I need to find a new one and spend some extra $$$ on it
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 21, 2012 11:52 am

shock pump and syringe don't need that much $$$ ;)
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 12:09 pm

with a syringe, you can make big Mix?
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 21, 2012 12:15 pm

Petitlu wrote:with a syringe, you can make big Mix?


In your case with a 200mL chamber, you will need to put 7mL in the chamber per mix. This means that 10x needs a 70mL injection, so you need a pretty big syringe ;)

You can go up to 28x with this method, and for that number you don't even need a syringe - simply purge the chamber with fuel at atmospheric pressure, then pressurise it with air to 27 bar.
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 12:23 pm

ok
A28x is the volume of the chamber, but to purge the air I need to put the BP in the long time chamber without bursting disc and then close all right?
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 21, 2012 12:28 pm

That's basically it. Connect fuel supply, purge, close off supply, add burst disk, pressurise to 27 bar, boom ;)
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 12:33 pm

I love the boom! :D
Thank

I have not been able to test Mix20 today because of bad weather.
I'll do it tomorrow
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Unread postAuthor: wyz2285 » Wed Mar 21, 2012 1:28 pm

How did you measured the effective chamber volume so precisely?? :shock:
I always had mix problems that´s why I´m sticking with pneumatics :roll: together with my fridge compressor :D
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 1:39 pm

I measured with water!
the room and I meter goes like this:
weigh the whole Chamber + + flexible connector (which will contain all of the air) with an accurate scale (0.1g)
fill with water and weigh all again, the difference in weight gives the cc

the electrode : :wink:

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Unread postAuthor: wyz2285 » Wed Mar 21, 2012 2:13 pm

I don´t quite understand how the electrode works... Does the spark happens between the pin and the chamber wall?
I was thinking about fill the chamber with water using a big syringe, will it work?
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 2:23 pm

I used a syringe to put water to be precise !

the spark occurs between the copper wire (blue) and the fitting which is screwed into the chamber

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Unread postAuthor: wyz2285 » Wed Mar 21, 2012 3:15 pm

Ah I though so, Thanks Petitlu!
So, time for me to build hybrid :P
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 3:20 pm

You made we a Mix80! 4" caliber ! :D
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Unread postAuthor: wyz2285 » Wed Mar 21, 2012 3:22 pm

:lol: :lol: :lol: Then I´m going to launch myself to the moon
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Petitlu » Wed Mar 21, 2012 3:36 pm

In France they say "I'll get the moon" when you are ready to do anything! :D
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