Pulsejet book
Moderator: Mike Everman
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Pulsejet book
Hi Guys,
Several days ago I visited this website: http://www.aardvark.co.nz/pjet/pulsejetbook.shtml to purchase the online pulsejet book. Only problem is, I made payment but there has been no reply.
I even sent in several emails asking for a status but still there is no reply.
Any ideas?
Thanks,
Tony
Several days ago I visited this website: http://www.aardvark.co.nz/pjet/pulsejetbook.shtml to purchase the online pulsejet book. Only problem is, I made payment but there has been no reply.
I even sent in several emails asking for a status but still there is no reply.
Any ideas?
Thanks,
Tony
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Re: Pulsejet book
Hi Tony,
Welcome to the forum.
I have moved your topic here to the "off-topic forum".
You have joined the several who have been 'bitten' in the past by that website owner, Bruce Simpson.
I don't why he does that. I have no advice but maybe someone else does.
Have fun here.
Cheers
Welcome to the forum.
I have moved your topic here to the "off-topic forum".
You have joined the several who have been 'bitten' in the past by that website owner, Bruce Simpson.
I don't why he does that. I have no advice but maybe someone else does.
Have fun here.
Cheers
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Re: Pulsejet book
Thanks for the feedback. I'll contact paypal for a refund.
Otherwise, would you know where I can find pulsejet plans? 100+ lbf, tested and proven designs?
I've visited the sticky threads but many of the links no longer work. I also saw the note of changing the "2" to a "3" and it worked to an extent but there are a lot of dead links.
Thank you.
Otherwise, would you know where I can find pulsejet plans? 100+ lbf, tested and proven designs?
I've visited the sticky threads but many of the links no longer work. I also saw the note of changing the "2" to a "3" and it worked to an extent but there are a lot of dead links.
Thank you.
Re: Pulsejet book
Hey Hydrazine
To bad about the pulse-jet book. Paypal should give you a refund so no harm done probably (eventualy)
About the 100 pound pulse-jet: have you ever build a smaller pulse-jet? also, do you want a valved or valveless engine? If you manage to find plans for a valveless engine (valved engines can be calculated using Eric's pulse-jet calculator I belive) and decide to build it, be very carefull when running it. I do not know about valved engines since I have never build one but I can tell you that a good 100 pound engine will rattle your bones and give you a headache, knock the wind out of you etc - it can be quite uncomfortable to be near a running engine of that size. The fuel delivery is going to be a challenge to and dangerous if you do not know what you are doing!
To bad about the pulse-jet book. Paypal should give you a refund so no harm done probably (eventualy)
About the 100 pound pulse-jet: have you ever build a smaller pulse-jet? also, do you want a valved or valveless engine? If you manage to find plans for a valveless engine (valved engines can be calculated using Eric's pulse-jet calculator I belive) and decide to build it, be very carefull when running it. I do not know about valved engines since I have never build one but I can tell you that a good 100 pound engine will rattle your bones and give you a headache, knock the wind out of you etc - it can be quite uncomfortable to be near a running engine of that size. The fuel delivery is going to be a challenge to and dangerous if you do not know what you are doing!
Quantify the world.
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Re: Pulsejet book
well, there are hardly any pulsejets on this forum from which I know they're around 100 lbf.
You could build the Lockwood Hiller, which puts out 55lbs of thrust and which efficiency is not very good. Another plan is from hinote, the ''Forum M1E'', I remember this one was 60lbs+ or so. Another (most current) pulsejet is the Thunderchine(55lbs). Beck technologies sells the Thermalpulse 180-70 which puts out around 70lbs of thrust.
If you really want a plan for a 100lbs pulsejet I think you should contact eric (beck technologies). But why do you want 100 lbs? 50 lbs is already enough to drive a go cart
I've found the book "the enthusiast's guide to pulsejet engines" and the book:''build a Lockwood pulsejet'' both from Bruce Simpson founded on the web(pm me for the address). But I wonder whether it was legal?
You could build the Lockwood Hiller, which puts out 55lbs of thrust and which efficiency is not very good. Another plan is from hinote, the ''Forum M1E'', I remember this one was 60lbs+ or so. Another (most current) pulsejet is the Thunderchine(55lbs). Beck technologies sells the Thermalpulse 180-70 which puts out around 70lbs of thrust.
If you really want a plan for a 100lbs pulsejet I think you should contact eric (beck technologies). But why do you want 100 lbs? 50 lbs is already enough to drive a go cart
I've found the book "the enthusiast's guide to pulsejet engines" and the book:''build a Lockwood pulsejet'' both from Bruce Simpson founded on the web(pm me for the address). But I wonder whether it was legal?
...It's better to generate heat efficiently, than recover it efficiently...
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Re: Pulsejet book
LOL
Yeah, 100 lbf is large and its not necessarily my build criteria but if I'm going to put the development and money into building one I may as well make it over the top fun.
Or maybe a better way to define what would I would really like to work with is based on physical dimensions.... IE I already have a considerable amount of 6" diameter 0.065" wall stainless tubing. If I could use this 6" tubing to build the tail pipe section that would be great. 6" tubing is readily available and rolling a 8" or 9" diameter combustion chamber is easy enough to do.
Either way, I would like to utilize this 6" tubing I currently have. I can't wait to get one going. I've wanted to do this for a long time.
BTW I have the plans for the Lockwood but it doesn't seem quite as appealing. What are these other you refer to? Links?
Thank you,
Tony
Yeah, 100 lbf is large and its not necessarily my build criteria but if I'm going to put the development and money into building one I may as well make it over the top fun.
Or maybe a better way to define what would I would really like to work with is based on physical dimensions.... IE I already have a considerable amount of 6" diameter 0.065" wall stainless tubing. If I could use this 6" tubing to build the tail pipe section that would be great. 6" tubing is readily available and rolling a 8" or 9" diameter combustion chamber is easy enough to do.
Either way, I would like to utilize this 6" tubing I currently have. I can't wait to get one going. I've wanted to do this for a long time.
BTW I have the plans for the Lockwood but it doesn't seem quite as appealing. What are these other you refer to? Links?
Thank you,
Tony
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Re: Pulsejet book
I've built a couple small pulse jets, a ramjet and many rocket engines.metiz wrote:Hey Hydrazine
To bad about the pulse-jet book. Paypal should give you a refund so no harm done probably (eventualy)
About the 100 pound pulse-jet: have you ever build a smaller pulse-jet? also, do you want a valved or valveless engine? If you manage to find plans for a valveless engine (valved engines can be calculated using Eric's pulse-jet calculator I belive) and decide to build it, be very carefull when running it. I do not know about valved engines since I have never build one but I can tell you that a good 100 pound engine will rattle your bones and give you a headache, knock the wind out of you etc - it can be quite uncomfortable to be near a running engine of that size. The fuel delivery is going to be a challenge to and dangerous if you do not know what you are doing!
My greatest experience is by far in rocket propulsion. I worked as a rocket scientist at Boeing and Kaiser Marquardt. Lots of experience with Hydrazine/NTO systems and 98%H2O2/Jet fuel 10K lbf engines. My heart is in rocket propulsion but pulse jets are vastly safer by comparison. At least from a pressure and chemical handling point of view.
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Re: Pulsejet book
Yepper ... 6 " for a tailpipe diameter looks like approx. 110 lbf thrust from my circular rule.
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Re: Pulsejet book
note that the above post is for valved pulsejets. You could calculate the dimensions for a valved pulsejets(with in your case a 6 inch tailpaipe) wiht eric's pulsejet calculator(as metiz said), which could be downloaded at the homepage of www.pulse-jets.com
When you input 113.04lbs, you get a tailpipe diameter of 6 inch, which give an cc dia of 8,75 inch
When you input 113.04lbs, you get a tailpipe diameter of 6 inch, which give an cc dia of 8,75 inch
...It's better to generate heat efficiently, than recover it efficiently...
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Re: Pulsejet book
nice job, Poeche
I dislike ,'s for .'s in decimal numbers. How do you guys 'across the pond' copy and paste the number into a calculator?
I dislike ,'s for .'s in decimal numbers. How do you guys 'across the pond' copy and paste the number into a calculator?
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Re: Pulsejet book
Thanks for all the great info and links guys! This is very helpful.
Now that I have a chamber geometry, how do I go about calculating grid and valve parameters?
Total flow area and reed length, width, aspect ratios and thickness?
Equations, papers or general rules of thumb for valve design?
Thank you!
Tony
Now that I have a chamber geometry, how do I go about calculating grid and valve parameters?
Total flow area and reed length, width, aspect ratios and thickness?
Equations, papers or general rules of thumb for valve design?
Thank you!
Tony
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Re: Pulsejet book
Is there an optimal ratio of pulsejet frequency / valve reed frequency?WebPilot wrote:Yepper ... 6 " for a tailpipe diameter looks like approx. 110 lbf thrust from my circular rule.
I can't recall the specific thread but I think you mentioned the value is some number less than one.