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Member |
It's nice to know someone is reading and enjoying them, they are, after all to educate and enliten those who wish to learn, or for those that don't, get some info rammed down there gully 'oles (throats).
Yours Most Sincerely. James |
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For educational purposes, wouldn't that be gully 'oles (gullet holes,throats).  I too enjoyed the fun and levity, uhm, I mean the info getting shoved down the ol pie hole, (throat).Dave |
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As I first suggested on page eight of this thread. Nice to see someone pays attention and takes it onboard. How do you want to forward the royalties?  LOLmathematical elegance -- desired result achieved with minimal complication |
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Member |
Hi Ant,
Nice to hear from you again. Are you refering to the venturi Graham drew for you, If so there's no connection between yours and mine, therefore no royalties, sorry. You might even owe me some, as I had pulished the venturi design you used, all be it drawn from copper pipe and not fittings, long before you, so there.  |
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No James, I was refering to the last paragraph in the above posting where i identified that mechanical loading had caused me problems and that a steel shell would be the way to solve this problem. Perhaps you read it at the time then forgot about it until you felt `inspired` by your subconscious later. Easily done, especially as we get older, assuming you are least as old as I am. Obviously I am glad you are using the design but we we all like to be credited for our contributions. On a lighter note I did use the orifice dimensions from one of your designs when I made a lego venturi. This was dictated by the physics of the sitiuation. However since I only made one and you have made several jacketed venturis (so far) I think I shoild still be in pocket on that one Now all I need is a numbered Swiss bank account to transfer the funds to...mathematical elegance -- desired result achieved with minimal complication |
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Point taken.
I bet you're a spring chicken compared to me, but if you are as old as you imply, how about I give you an account number for your wedge. |
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Member |
Well I'm old enough that my mind is no longer quite as efficient as it once was... I suspect you are older from comments you have made in the past.
You can save my royalties until there is enough for a pint I can collect if I`m ever passing. It would be nice to sit down with you for a chat in the pub if I happen by your way. mathematical elegance -- desired result achieved with minimal complication |
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Member |
That would be nice, we could talk about the old day's. I remeber Nelsons home coming, that was a sad day.
I'll borrow a piggy bank from my great great grandson to put your royalties in. I'll let you know when you have enough for a pint, but allowing for inflation that could be a year or two away. |
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Member |
Jamesrl,
Have you ever tried to make venturi with "metal spinning metod:" http://uk.youtube.com/watch?v=Gwrk0SwDJhI&feature=related |
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Member |
I work in my garage with basic tools, a spinning machine with all the tooling is very expencive.
After watching the video clip, I recon if I started with the blank ready to work, the same as he has, I'd be finished shaping a cone before the got half way along the former, and carbon free. I'll stick with my Magic Hammer. I did enjoy the video, thanks. Jim. |
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Member |
Hi to all my readers,
Evolution marches on, I have now put my copper venturi's inside a pipe for added strenght, both 22mm/3/4"and 28mm/1". The example in the attachment is 22mm/3/4" with compression fittings, screw and solder fittings are also available.  Copper_pipe_venturi.JPG (50 KB, 201 downloads) |
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member 2009 Sponsor |
I have posted my own design on another thread but would like to share it here.
 I had a local machine shop here in my town manufacture a prototype out of mild steel for about $25 bucks. I found a hole-in-the-wall machine shop that wanted to make it for the hell of it. Illegitimi Non Carborundum |
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Member |
I hope you are going to store my royalties up as well Spencnaz lol. Be nice of someone to send me one of these venturi in steel tube jobs if they felt so inclined to reward me for the original idea. Never had time to make one myself.
Looking at your lovely diagram I notice you still use a side tube on the inner venturi. Is this strictly needed? would not a small hole in the venturi and a side tube in the steel pipe be easier to fabricate and work in much the same way? Which way do you do it Jim? Just came online for an update on the original lego venturi. After changing the pump for a 60litre a minute one the LV could suck the chrome off a trailer hitch as the saying goes. The meth goes in twice as fast but the oil is also moving twice as fast so the ratio of the mix stays the same. Faultless mixing and reactions. mathematical elegance -- desired result achieved with minimal complication |
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Member |
Hi Ant,
Go back to my post from 12 Oct. page 10, you'll see how I make mine. These venturi's will suck in small children and animals. 60ltr/min? why not get a proper pump, I've got two 164ltr/min pumps. I wouldn't consider anything under 80ltr/min. I've just supplied a reactor and pump 134ltr/min to a customer, he couldn't believe it when it emptied his 200ltr storage tank in just 1 1/2 mins. Jim. Jim. |
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member 2009 Sponsor |
Hi Ant, I based the design on GL's processor and decided on machining it out of steel rather than working in copper. The side tube is the suction port for the venturi. It will be tapped for a valve. Illegitimi Non Carborundum |
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Member |
Ahh I see. You machined it out of a solid steel bar. Not the copper in steel sheath type I suggested. Your's should be the last word in solid engineering and physical strength. Beyond my tools and skills to copy but nicely done. mathematical elegance -- desired result achieved with minimal complication |
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Member |
Thanks I missed the body and core pic until you pointed me to it. I see you use a slit in the inner body for a hole and a side tube on the outer body for the suction connection. Easier to fabricate and both your earlier work and physics suggested it would work as well. As for the pump... Well I really see no need to go larger than needed for the job in hand. The venturi does the vast majority of the mixing as the meth is added so there is no need for a faster pump. The meth adds in around 14mins which is around two turnovers of the tank volume; a one in ten mixing ratio. This is a good time and ratio for the reaction time at the temps I use. Everything is well mixed and almost finished reacting by the time the meth is all in. More interesting is that the ratio stayed the same when the pump doubled in speed. This suggests a fixed ratio venturi could be made exactly on the 5 to 1 ratio needed for a continous process. I imagine it involves the relationship between the three main dia in the venturi. The main pipe, the neck and the suction port. mathematical elegance -- desired result achieved with minimal complication |
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member 2009 Sponsor |
I will write an update on how the venturi is coming along tomorrow.
Illegitimi Non Carborundum |
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member 2009 Sponsor |
Update,
The first machine shop was unable to make the longer throat of the venturi with what tooling they had. I conferred with another machinist and he said that a special bar/tool would have to be made to make the 10 degree throat. I'm going to a technical college tomorrow to talk with them about what could be done to finish the part. Illegitimi Non Carborundum |
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