@locouk Unfortunately, the size and weight of such a suppressor would make the whole thing impractical. You'd need a chamber that was many times larger (and heavier) than the engine itself.
VERY good information, thank you! I have always loved the canard designs, but never built one because I was familiar with this issue. Now I know how to solve it! Thanks again :)
Hey man, love what your doing here! i work at scaled compossites burt would really love to see what your doing with his aircraft! keep it up your doing great!
Reliable! The valves on the intake hardly last a flight! but I have to agree when compared to a Turbine jet engine the pulse jet has several advantages most importantly its a crowd pleaser!
The valves on most of my engines last about 20 minutes flight-time and the most recent design (with dual valves) is still on its original set after about 12 runs.
thnat for the explanation,today remove the weak weld knot on the push rod linkage and replace it with MIG TYPE wire welding,and now looks more like real strong,i"ll continue with the kit building prosess and may post it when test fly it,thanks for all tips
I have this plane. I have experienced the nasty stall you talk about. Please tell me how much positive incidence on the canard I need. I also thought about changing the main wing to less positive incidence because the canard is already epoxied in.
Hi Bruce! Are you selling that pulsejet? I saw in your web that you have some pulsejets to sell, I tried to contacted you, but I didn´t get a response... Hope you can help me! Good work!!
Hi Love ya vids. You mention that you built the pulse jet I have a good mate who is very into different engines and good with machines he has his own lathe and mill. would you be able to show us how to make one of these by any chance?? please cheers
Ps still hope to get to your field and meet you one day
this thing is a micro rc v-1 flying bomb! haha, i first saw your pulsejets in the form of the gokart a few years ago, most impressive sir, how do you plan to get the fuel from the tank to the engine, some kind of pressurised tank?
There are three ways to do the fuel system. First is to just rely on the fuel draw of the venturi -- that's fine for static running but unreliable when the G-forces go up and down. Second is to pressurize the tank from the combustion chamber and use a demand regulator so that a constant pressure is maintained at the venturi (that's what I'm doing here). The third way is to use a pump and inject fuel straight into the chamber (expensive - good pumps are $150+).
how exactly did you pressurize the tank from the combustion chamber? did you just connect the two with a pipe, or did you put a one-way valve in the middle, or what?
A small bleed hole is drilled in the valve-plate which allows a carefully measured amount of pressure to be transferred from the combustion chamber to the tank. This method is used so that the hot gases are actually cooled as they pass through the valve-plate. There is no need for a non-return valve because the average combustion pressure is greater than ambient.
can these engines have throttles because im only 15 i fly rc planes at my local club and want a jet but as you said turbines are way two expensive and i always use the throllte so could you use a throtlle on these engines ps could you acutually classifie one of these engines as a real jet
Thanks Bruce, Your infomation on the Carnard angle was very useful and have help save me a good plane. Nice to see a fellow KIWI flying the long EZ as well. I'm in Thailand though, Here you can pretty much fly any day. and Pretty much anywhere with out getting arrest, There are more than 10 official RC air field in Bangkok anyway. There are a few KIWI blokes in Bangkok flying as well :)
I love NZ... I wanna go home:(
11kungfu11 1 month ago in playlist My pulsejet-powered RC planes
I could not fly a plane that had no speed control. : ) Just like the speed planes
krapptacular 2 months ago
Is it possible to make a pulse jet with a noise suppressor such as one used on a gun Food for thought for you. :)
locouk 2 months ago in playlist My pulsejet-powered RC planes
@locouk Unfortunately, the size and weight of such a suppressor would make the whole thing impractical. You'd need a chamber that was many times larger (and heavier) than the engine itself.
xjet 2 months ago
VERY good information, thank you! I have always loved the canard designs, but never built one because I was familiar with this issue. Now I know how to solve it! Thanks again :)
jasmine2501 4 months ago
Hey man, love what your doing here! i work at scaled compossites burt would really love to see what your doing with his aircraft! keep it up your doing great!
shizleshane 1 year ago
I would like to see your BIG LOCKWOOD!
55dcyinely 1 year ago
masterboy12311
it was really gd. :)
masterboy12311 1 year ago
It was really gd.
masterboy12311 1 year ago
where i can buy engine like that ??
Elamin008 1 year ago
@Elamin008 Nazi Germany.
datzfast 1 year ago
Reliable! The valves on the intake hardly last a flight! but I have to agree when compared to a Turbine jet engine the pulse jet has several advantages most importantly its a crowd pleaser!
MalliaCamilleri 2 years ago
The valves on most of my engines last about 20 minutes flight-time and the most recent design (with dual valves) is still on its original set after about 12 runs.
xjet 2 years ago
Hi Bruce, I love your channel and I love NZ! Keep on going!!!
Free07Style 2 years ago
At what frequency do the pulse jets typically operate at. I saw a doodlebug on an old film that ran at about 30 blasts a second.
danielgosson 2 years ago
This comment has received too many negative votes show
Very,very stupit!!!!!!!
boegi42 2 years ago
damn ur awsome ! im subscribing !
bluescan92 2 years ago
do they still sell that arf in NZ?
thanks
Guinnie 3 years ago
thnat for the explanation,today remove the weak weld knot on the push rod linkage and replace it with MIG TYPE wire welding,and now looks more like real strong,i"ll continue with the kit building prosess and may post it when test fly it,thanks for all tips
stealhty1 3 years ago
I have this plane. I have experienced the nasty stall you talk about. Please tell me how much positive incidence on the canard I need. I also thought about changing the main wing to less positive incidence because the canard is already epoxied in.
techserv1028 3 years ago
Hi Bruce! Are you selling that pulsejet? I saw in your web that you have some pulsejets to sell, I tried to contacted you, but I didn´t get a response... Hope you can help me! Good work!!
monkeyking114 3 years ago
Nice video and info in your site!!
What kind of fuel uses this jets? glow?
Regular gasoil can be used? did you know if some uses hho gas?
can This "tubes" be turbo charged with a electric ducted fan? Thanks
alex681219 3 years ago
thanks for the vid
Tripp393 3 years ago
Hi Love ya vids. You mention that you built the pulse jet I have a good mate who is very into different engines and good with machines he has his own lathe and mill. would you be able to show us how to make one of these by any chance?? please cheers
Ps still hope to get to your field and meet you one day
POPPAVALIUMANDROPOV 3 years ago
Hey Bruce :-)
Like the video. Im looking forward to see the plane in the air.
Is the pulsejet also called a ramjet? The ramjet is not allowed here in Denmark, because it makes A LOT of noise! :-)
Bjarne
lillebrordk 3 years ago
staying tuned!
Marco112390 3 years ago
First flight video is now posted.
xjet 3 years ago
this thing is a micro rc v-1 flying bomb! haha, i first saw your pulsejets in the form of the gokart a few years ago, most impressive sir, how do you plan to get the fuel from the tank to the engine, some kind of pressurised tank?
Jolinator 3 years ago
There are three ways to do the fuel system. First is to just rely on the fuel draw of the venturi -- that's fine for static running but unreliable when the G-forces go up and down. Second is to pressurize the tank from the combustion chamber and use a demand regulator so that a constant pressure is maintained at the venturi (that's what I'm doing here). The third way is to use a pump and inject fuel straight into the chamber (expensive - good pumps are $150+).
xjet 3 years ago
how exactly did you pressurize the tank from the combustion chamber? did you just connect the two with a pipe, or did you put a one-way valve in the middle, or what?
d0wnwithgravity 2 years ago
A small bleed hole is drilled in the valve-plate which allows a carefully measured amount of pressure to be transferred from the combustion chamber to the tank. This method is used so that the hot gases are actually cooled as they pass through the valve-plate. There is no need for a non-return valve because the average combustion pressure is greater than ambient.
xjet 2 years ago
can these engines have throttles because im only 15 i fly rc planes at my local club and want a jet but as you said turbines are way two expensive and i always use the throllte so could you use a throtlle on these engines ps could you acutually classifie one of these engines as a real jet
FlyHighRC386 2 years ago
with electric fuel pumps strait into the chamber over 60% is posable
lomasck 2 years ago
Thanks Bruce, Your infomation on the Carnard angle was very useful and have help save me a good plane. Nice to see a fellow KIWI flying the long EZ as well. I'm in Thailand though, Here you can pretty much fly any day. and Pretty much anywhere with out getting arrest, There are more than 10 official RC air field in Bangkok anyway. There are a few KIWI blokes in Bangkok flying as well :)
hotpeng 2 years ago