Ought to duct tape it the top of that van and see what it would do. But seriously, does not look very fuel efficient. How many minutes does it take to use up that bottle of gas? Does most of the thrust come out of the bottom or top tube? Interesting construction.
Yes there is. The valveless ones loose power when some of the power shoots forward, valved ones don't do that because the valves prevent any from going forward, but the valve has a very short lifespan. A solution to the issue about the power coming out the intake is to point the intake backwards, like this one.
However, valved pulsejet has better efficiency by higher compression ratio.
It is the reflecting pulse (part of outgoing shockwave is reflected back to combustion chamber) that makes the compression - in valveless pulse jet some of this pressure is wasted out through intake tube causing lower compression for air/fuel mixture before ignition. Thus, causing lower fuel economics.
Not quite. They used a valved pulse jet on their V1. My pulse jet is a valvless lockwood type - no moving parts. The V1 was rated with a run time in minutes because the valves wear out real fast.
@htannberg well they were valved and the reason the did not go far or fly long is they had 150 gall. of fuel and they got 1 gall per mile so there max range was 150 miles going at 400mph they had a adv. flight time of 22 min. not that the valves stopped working they ran out of fuel and fell
@merlin905 wrong not v2 it was the v1 buzz bomb it sounded like it buzzed as it went over because if was a valveless pulse jet but a bit higher quality than the one in this vid no offense its a great homemade one but the Germans had rocket scientists and lots of funding more then 50 bucks in tubing and propane no offense intended the v2 was a liquid fueled rocket using a 75% ethanol/water mixture for fuel and liquid oxygen (LOX) for oxidizer
Yes that's correct and it will last much longer than a valved pulse jet. The greatest point of failure is probably the spark plug. I've seen them un-screw themselves because of the vibration.
100 LBS thrust is enough to make a plane fly with a small payload. Yes. a *lot* of power is wasted in the sound and a decent turbine jet engine could easily outperform that on the same amount of fuel, but that engine is simple, low cost and very rugged as it has 1 moving part.
It's fun! I wanted to get some good shots. It's not as loud also. After about 6 feet you only feel warm air, and you can get a feel for how much thrust it puts out.
nice metroliner in the back
paulendris 1 month ago
nice work! I have smaller pulsejet and a little different type (chinese) . but my friend has very similar to yours.
tonskulus 2 months ago
bet it hardly breaks 25lbs
rcfreak2493 6 months ago
No fuel pump. The propane is already pressurized. It wants a lot, more than a barbeque bottle can deliver.
htannberg 1 year ago
Do you use a fuel pump? And how does the fuel mix with air.
faffaflunkie 1 year ago
WHOA! I LIKE HAMBURGERS TOO!!!!!!!!!!!!!!!!!!
magicalpie1244 1 year ago
Wow...
Magnolianblade 1 year ago
the original fart rocket!!
xXspartan125Xx 1 year ago
Ought to duct tape it the top of that van and see what it would do. But seriously, does not look very fuel efficient. How many minutes does it take to use up that bottle of gas? Does most of the thrust come out of the bottom or top tube? Interesting construction.
Accumulator1 1 year ago
Is there a difference in power output between a valveless and valved pulse jet?
gargamel6699 2 years ago
Yes there is. The valveless ones loose power when some of the power shoots forward, valved ones don't do that because the valves prevent any from going forward, but the valve has a very short lifespan. A solution to the issue about the power coming out the intake is to point the intake backwards, like this one.
FliegenCockatiel 2 years ago
@FliegenCockatiel
However, valved pulsejet has better efficiency by higher compression ratio.
It is the reflecting pulse (part of outgoing shockwave is reflected back to combustion chamber) that makes the compression - in valveless pulse jet some of this pressure is wasted out through intake tube causing lower compression for air/fuel mixture before ignition. Thus, causing lower fuel economics.
tonskulus 2 months ago
nazi used this for v2 rokets launch to london,amazinz
merlin905 2 years ago
Not quite. They used a valved pulse jet on their V1. My pulse jet is a valvless lockwood type - no moving parts. The V1 was rated with a run time in minutes because the valves wear out real fast.
htannberg 2 years ago
@htannberg well they were valved and the reason the did not go far or fly long is they had 150 gall. of fuel and they got 1 gall per mile so there max range was 150 miles going at 400mph they had a adv. flight time of 22 min. not that the valves stopped working they ran out of fuel and fell
minibikerider1 8 months ago
@merlin905 it was the v1 rocket
waaaaaaaaaaaassd 9 months ago
@merlin905
waaaaaaaaaaaassd 9 months ago
@merlin905 it was the v1 rocket
waaaaaaaaaaaassd 9 months ago
@merlin905 wrong not v2 it was the v1 buzz bomb it sounded like it buzzed as it went over because if was a valveless pulse jet but a bit higher quality than the one in this vid no offense its a great homemade one but the Germans had rocket scientists and lots of funding more then 50 bucks in tubing and propane no offense intended the v2 was a liquid fueled rocket using a 75% ethanol/water mixture for fuel and liquid oxygen (LOX) for oxidizer
minibikerider1 8 months ago
0:14 - 0:15 deep Bass
MrMrKingfisher 2 years ago 2
a little bit deeper and you hit the brown note.
scarface8999 2 years ago 11
@scarface8999 myth
TheBloodyhacksaw 1 year ago
@TheBloodyhacksaw
I shall prove it
scarface8999 1 year ago
@scarface8999
LMAO :D
MrMrKingfisher 1 year ago
RIIIIIIIIIOOOLLLL *BOOM* LMAO!
1NoneofYourBusiness1 2 years ago
Would that work with a didgeridoo?
schl0tte 2 years ago
lmfao maybe it is a digeridoo and a pulse jet in 1? :o
2007FORLife 2 years ago
lol
o0oReFLexo0o 2 years ago
looks like the big horn from Ricola commercial
diggumsmack2 3 years ago 4
Nice Convair 404 in the background.
Gruntol5 3 years ago
DAM Who farted!
pickassXD 3 years ago
sorry that was me :)
goolaman333 2 years ago 8
man i really want to see someone inject oil into a pulse jet just for the smoke
k2500diesel 3 years ago 2
Yes that's correct and it will last much longer than a valved pulse jet. The greatest point of failure is probably the spark plug. I've seen them un-screw themselves because of the vibration.
Cheers
hagent25 3 years ago
simple..
weld it in place
evankoka12 2 years ago
actually that engine has no moving parts at all it's valveless
lostinmind62 3 years ago
It has a spark plug >.>
Hakidia 2 years ago
100 LBS thrust is enough to make a plane fly with a small payload. Yes. a *lot* of power is wasted in the sound and a decent turbine jet engine could easily outperform that on the same amount of fuel, but that engine is simple, low cost and very rugged as it has 1 moving part.
RyuDarragh 3 years ago
It's fun! I wanted to get some good shots. It's not as loud also. After about 6 feet you only feel warm air, and you can get a feel for how much thrust it puts out.
hagent25 3 years ago
Why would you stand behind it?
AVEngelene 3 years ago
Sounds nice
RagnarTheSniper 3 years ago
how much thrust does this engine generates?
SINKID3 3 years ago
description, read it.
Joelduffy 3 years ago
hmm...*looks at minivan*
TopGunMan 3 years ago
oepsss , to much fuel on the end.Very nice lockwood.
barrysteenmans 3 years ago
Perfectly tuned!
trader891 3 years ago
It should work much better once I make a better injector.
htannberg 3 years ago
Hi htannberg. Are you going to propell anything with this nice pulse engine??
Fritztoons 4 years ago
I would like to one day put it on a go-kart.
htannberg 3 years ago
woah niceeeeeeeeeee
shes on fire
NateDoGG122990 4 years ago
Awesome pulse jet DUDE!!!!
jandc805 4 years ago