pusejet

[Håken]

Hi, im building my first pulsjet. I have calculated dimentions for 78
lbs ( 35 kg metric ) of thrust.

Here is the dimentions:

Exhaust pipe diameter : 5 Inch

Exhaust pipe lenght : 34.11

Combustion chamber lenght :11.34
Exhaust cone lenght :11.34
combustion chamber diameter 7.28

I am going to use argus type valves.

The plate that the valves rest against has 5 slots measuring 45X17
milimeters.

There are 4 of these plates, two of them forming a "V".
It is two of these "V"s velded to the front plate that has 2 holes
measuring
41.92X144.21 milimeters.

The angle between eatch plate of the 2 forming eatch "v" is 31 degrees

The valves are overlapping 3.4 mm of the edges in each slot cut in the
valve resting plate.

For fueling i am planning to use 3 steel tubes drilled with small
holes so the fuel can enter the combustion chamber.
These vill be located 3 inc deep in the combustion chamber.

So if anyone has some opninions on my design, ill be glad too hear.

Håken
Norway

[Orval Fairbairn]

In article >,
Håken > wrote:

> Hi, im building my first pulsjet. I have calculated dimentions for 78
> lbs ( 35 kg metric ) of thrust.
>
> Here is the dimentions:
>
> Exhaust pipe diameter : 5 Inch
>
> Exhaust pipe lenght : 34.11
>
> Combustion chamber lenght :11.34
> Exhaust cone lenght :11.34
> combustion chamber diameter 7.28
>
> I am going to use argus type valves.
>
> The plate that the valves rest against has 5 slots measuring 45X17
> milimeters.
>
> There are 4 of these plates, two of them forming a "V".
> It is two of these "V"s velded to the front plate that has 2 holes
> measuring
> 41.92X144.21 milimeters.
>
> The angle between eatch plate of the 2 forming eatch "v" is 31 degrees
>
> The valves are overlapping 3.4 mm of the edges in each slot cut in the
> valve resting plate.
>
> For fueling i am planning to use 3 steel tubes drilled with small
> holes so the fuel can enter the combustion chamber.
> These vill be located 3 inc deep in the combustion chamber.
>
> So if anyone has some opninions on my design, ill be glad too hear.
>
> Håken
> Norway

WHY? A pulse jet is a major fuel hog and is useful mostly for converting
fuel into niose, not into useful thrust.

[guynoir]

Most pulse jet designs I've seen spray the fuel into a diffuser ahead of
the valve.

Go to: http://www.pulse-jets.com/ for some useful information on pulse
jets. It has drawings of several different models of pulse and pressure
jet, including the Argus. They also have a fairly active moderated forum.


Håken wrote:

> Hi, im building my first pulsjet. I have calculated dimentions for 78
> lbs ( 35 kg metric ) of thrust.
>
> Here is the dimentions:
>
> Exhaust pipe diameter : 5 Inch
>
> Exhaust pipe lenght : 34.11
>
> Combustion chamber lenght :11.34
> Exhaust cone lenght :11.34
> combustion chamber diameter 7.28
>
> I am going to use argus type valves.
>
> The plate that the valves rest against has 5 slots measuring 45X17
> milimeters.
>
> There are 4 of these plates, two of them forming a "V".
> It is two of these "V"s velded to the front plate that has 2 holes
> measuring
> 41.92X144.21 milimeters.
>
> The angle between eatch plate of the 2 forming eatch "v" is 31 degrees
>
> The valves are overlapping 3.4 mm of the edges in each slot cut in the
> valve resting plate.
>
> For fueling i am planning to use 3 steel tubes drilled with small
> holes so the fuel can enter the combustion chamber.
> These vill be located 3 inc deep in the combustion chamber.
>
> So if anyone has some opninions on my design, ill be glad too hear.
>
> Håken
> Norway

--
John Kimmel


I think it will be quiet around here now. So long.

[Pat Norton]

Håken wrote
>I have calculated dimentions for 78 lbs
>( 35 kg metric ) of thrust.

The metric unit of force is the newton.
78 pounds force is ~350 N


Try the google converter, just do a 'search' for:
78 pounds force

[Regnirps]

>The metric unit of force is the newton.
>78 pounds force is ~350 N

Then he should probably use poundals for the rest of us.

-- Charlie Springer

[Bruce Simpson]

On Wed, 24 Mar 2004 05:28:15 GMT, guynoir >
wrote:

>Most pulse jet designs I've seen spray the fuel into a diffuser ahead of
>the valve.
>
>Go to: http://www.pulse-jets.com/ for some useful information on pulse
>jets. It has drawings of several different models of pulse and pressure
>jet, including the Argus. They also have a fairly active moderated forum.

There's also a heap of stuff at http://aardvark.co.nz/pjet/


--
you can contact me via http://aardvark.co.nz/contact/