Boom!  The classic potato gun harnesses the combustion of flammable vapor.  Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
			
		
		
			
				
								Petitlu 				                
							 
	
        
						Corporal 4 			
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								  Tue Nov 06, 2012 4:39 pm 
			
			
			
			
			Hi, I present the Poly-19, made in 1 hour!
Barrel and fittings PVC-P, chamber polycarbonate.
Cal: 19mm, 720mm barrel.
Chamber: D40mm, L: 340mm
Multi piezo ignition point.
This is a prototype, so!
 
[youtube]
VIDEO [/youtube]
 
            
			
													
					Last edited by 
jrrdw  on Thu Oct 24, 2013 2:07 pm, edited 1 time in total.
					
Reason:  Fixed video. 				 
			
						
			
						 
		 
				
		
		 
	 
	        
			
		
		
			
				
								jackssmirkingrevenge 				                
							 
	
        
						Five Star General 			
		Posts:  26216  		Joined:  Thu Mar 15, 2007 11:28 pm 		
		
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								  Tue Nov 06, 2012 4:45 pm 
			
			
			
			
			Superb!
Interesting to see the effects of multiple ignition points, you can clearly see the difference - Bravo!
Also, love those Brenneke slugs... that barrel needs to go on ThorJack too 
 
            
			
									
						
			hectmarr wrote: You have to make many weapons, because this field is long and short life
 
						 
		 
				
		
		 
	 
	        
			
		
		
			
				
								Petitlu 				                
							 
	
        
						Corporal 4 			
		Posts:  807  		Joined:  Fri Jun 03, 2011 4:52 am 		
		
						     
     
						
		 
		
						
						 
													
							
						
									 
								  Tue Nov 06, 2012 4:54 pm 
			
			
			
			
			thank you 
For Thorjack, I would need a gun metal! 
And 19mm internal, it is difficult to find ... 
 
For ignition tests, I've done a lot, I have videos!
            
			
									
						
			
						 
		 
				
		
		 
	 
	        
			
		
		
			
				
								jackssmirkingrevenge 				                
							 
	
        
						Five Star General 			
		Posts:  26216  		Joined:  Thu Mar 15, 2007 11:28 pm 		
		
						    Has thanked:  576 times  
    Been thanked:  347 times  
							
		 
		
						
						 
													
							
						
									 
								  Wed Nov 07, 2012 12:48 am 
			
			
			
			
			Petitlu wrote: For Thorjack, I would need a gun metal! 
And 19mm internal, it is difficult to find ...
I used PVC pipe as a barrel for hybrids up to 15x:
 
The heavy duty stuff, I believe what the Americans call Schedule 40 - roughly 1" outside diameter, 0.75" inside.
It works great 
 
[youtube]
VIDEO [/youtube]
For ignition tests, I've done a lot, I have videos!
Looking forward to seeing them 
 
            
			
													
					Last edited by 
jrrdw  on Thu Oct 24, 2013 2:03 pm, edited 1 time in total.
					
Reason:  Fixed video. 				 
			
						
			hectmarr wrote: You have to make many weapons, because this field is long and short life