Print PDF
Favorite
Email
***********************************************************************************************************
THIS INSTRUCTABLE IS NOT FINISHED, I HAVE SOME VIDEOS TO UPLOAD YET. SUBSCRIBE FOR UPDATES.
LBO
***********************************************************************************************************
This is the new and improved version of my Mark I Origional Beer Can Jet Engine. It has a far more severe throat in the air intake to aid compression, a new power suply that is variable and works of mains electricity (instead of a complex power pack) and an inline fuel injection system that opposes the direction of air to improve the fuel-air mixture.
The results were mixed, it wasnt the massive improvement in performance i was expecting but i am pleased that it wasnt a complete failure, i have learned alot about the construction and opperation during my investigation and experimentation and hopefully in the Mark III Engine the culmination of the two builds with result in one engine of definably superior performance.
Visit my website for more information and other similar builds: Letsbuildone.110mb.com
THIS INSTRUCTABLE IS NOT FINISHED, I HAVE SOME VIDEOS TO UPLOAD YET. SUBSCRIBE FOR UPDATES.
LBO
***********************************************************************************************************
This is the new and improved version of my Mark I Origional Beer Can Jet Engine. It has a far more severe throat in the air intake to aid compression, a new power suply that is variable and works of mains electricity (instead of a complex power pack) and an inline fuel injection system that opposes the direction of air to improve the fuel-air mixture.
The results were mixed, it wasnt the massive improvement in performance i was expecting but i am pleased that it wasnt a complete failure, i have learned alot about the construction and opperation during my investigation and experimentation and hopefully in the Mark III Engine the culmination of the two builds with result in one engine of definably superior performance.
Visit my website for more information and other similar builds: Letsbuildone.110mb.com
Remove these ads by
Signing UpStep 1Gather the materials and tools you will need
Materials Required:
@ At least 4 Steel cans, specifically the taller ones and bigger ones are better.
@ Copper tubing, i used half inch diameter plumbing tubing i had in the garage for its rigidity as this will hold your engine together.
@ Some flexible plastic fuel hosing long enough for you to be comfortably far enough from a running miniature jet engine, 3m did me, I got some from my local model shop used for nitro cars.
@ An old hair dryer or other air moving device, leaf blower could work, or a ducted fan/propeller.
@ A variable resistor or potentiometer, I used a dimmer switch of a house light switch in series with the mains power pack.
@ A length of wire as long as your rubber hosing at least, two wires needed to power electric motor for your fan.
@ Really small drill bits and a drill, 1mm or less for fuel nozzles.
@ Tape, adhesives and solder would be helpful.
@ Insulation tape
@A solid piece of aluminium at least 2.5cm diameter, cylindrical, aluminium to save weight and you want it to be up to say around 10cm long to improve fluid dynamics and less than around 5cm diameter. this will be the fuel injector and it will also double up to throttle the air flow to increase compression.
Tools Required:
@ Sand Paper, to smooth and remove paint.
@ Soldering Iron possibly to solder the powerpack.
@ Possibly a screw driver for any choca blocks.
@ Drill to drill fuel nossles with.
@ Sharp knife for cutting cans, tape and general use.
@ Scissors for cans tape and general use.
@ Pliers
@ Relevant Safety equipment, gloves, goggles, fire extinguisher and COMMON SENSE.
@Laithe to turn the aluminium. you may be able to use a clamped drill but be very carefull and use your college or schools laithe if possable as then you can be supervised by trained staff while it is in use.
@Assorted cutting bits, files, wire brushes, and other abrasives to
@ At least 4 Steel cans, specifically the taller ones and bigger ones are better.
@ Copper tubing, i used half inch diameter plumbing tubing i had in the garage for its rigidity as this will hold your engine together.
@ Some flexible plastic fuel hosing long enough for you to be comfortably far enough from a running miniature jet engine, 3m did me, I got some from my local model shop used for nitro cars.
@ An old hair dryer or other air moving device, leaf blower could work, or a ducted fan/propeller.
@ A variable resistor or potentiometer, I used a dimmer switch of a house light switch in series with the mains power pack.
@ A length of wire as long as your rubber hosing at least, two wires needed to power electric motor for your fan.
@ Really small drill bits and a drill, 1mm or less for fuel nozzles.
@ Tape, adhesives and solder would be helpful.
@ Insulation tape
@A solid piece of aluminium at least 2.5cm diameter, cylindrical, aluminium to save weight and you want it to be up to say around 10cm long to improve fluid dynamics and less than around 5cm diameter. this will be the fuel injector and it will also double up to throttle the air flow to increase compression.
Tools Required:
@ Sand Paper, to smooth and remove paint.
@ Soldering Iron possibly to solder the powerpack.
@ Possibly a screw driver for any choca blocks.
@ Drill to drill fuel nossles with.
@ Sharp knife for cutting cans, tape and general use.
@ Scissors for cans tape and general use.
@ Pliers
@ Relevant Safety equipment, gloves, goggles, fire extinguisher and COMMON SENSE.
@Laithe to turn the aluminium. you may be able to use a clamped drill but be very carefull and use your college or schools laithe if possable as then you can be supervised by trained staff while it is in use.
@Assorted cutting bits, files, wire brushes, and other abrasives to
| « Previous Step | Download PDFView All Steps | Next Step » |
Other than that, cool engine.
I am from india and made an rc plane in brussels, I make rc planes, rc trucks, rc sidecar and rc speed boats I wanted to make something new so i thought to make an jet engine. Can you please tell me how to build it , Can I use iron (mosquito spray )cans, I used a hairdryer deduct fan and a rc helicopter motor.Can you tell me the what to do in the step 5 (fuel injectors).Please reply me as fasty you can . Please please please help help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The ducted fan and heli motor will work great. so will the mosquito can. make sure it is COMPLETELY empty before you think about opining it though and wash it thoroughly as the contents were poisonous.
Good luck :)
Thanks for a quick reply.About your engine my friend (the one who helped me in my projects and the owner of avionic modelsime in brussels www.shop.avionic.be) sebastien maes thinks that the engine may burst on this temp. after a few seconds.And about the hairdryer fan he said it wont work . He told me to use a stainless steel can.And to use an edf fan.About the fuel it may explode so we may use kerosene. He told me that he can ask anyone to make an lathe fuel injector.He want the plans for it can you send me them on my email- singhadityapartap4@gmail.com , and if you want to make an engine which may produce a lot of thrust and work for a lot of time you can follow these steps :) Can you please send me some pdf on my email as I cannot be a member on this website as my mom won't allow me. :)
Won't the iron will melt at higher temp.
Don't use the fuel injector from this engine, it is heavy and didn't work well. Use the one off the mark I engine. That worked well.
An EDF we will work much better than a hair drier, if you have one, use it.
You can use kerosene but you will need atomising fuel injectors and a fuel pump. This is much more complex than using pre pressurised gaseous butane.
If you still want the CAD I can send it you but the mark I solution is much better.
Thanks again for a quick reply.About the fuel injector i will ask Sebastien maes and see what will he say.What can we do to increase the thrust? About the butane gas he said it is dangerous to use it and it may burst and harm us.Can you send me the pdf for this engine? Which engine worked better- mark1 or mark2 ?
You can also increase thrust by increasing the power of the fan, the amount of fuel burnt and the temperature at which it is burnt.
If you use butane you should use a nice long delivery hose. The first time you use it, it will flush the air out of the hose leaving only butane. Without oxygen the butane cannot burn so your butane canister can be remote from your engine and it will be relatively safe to use.
The mark one engine was significantly better than the mark two. Mainly because of the fuel injector, it was heavy and didn't work particularly well.
I am e-mailing you the pdf's now
Thanks a lot :):):):):):):)
Also, whether or not mine works or fails horribly, I had a great idea for the next one. First, I want to make it bigger, easier to work on, second I want 2 to 4 Fuel Injectors from a car that I can use to inject gasoline or other liquid into the combustion chamber and last, I want to get a machine shop to make some parts so they are perfect. I think this would step it up even more and produce something that would work without a problem.
Will it work if I used a Desktop Computer Fan instead? I'm not sure, I'll rip out my old desktop soon, I'm not sure it can give enough trust.
What can I use ask the sparker which lights the gas in the compression chamber?
Sorry but a PC fan won't have enough thrust. You can try over volting a rather powerful one though and see what happens.
There is no sparkler in the combustion chamber, I ignite it with a blowtorch. Now you mention it a sparkler would be perfect. Anything where there is fire on the end of a stick in general.
LBO
Will this generate enough thrust to push an RC Car or something?
Maybe it would have more thrust if the gas was ignited in the combustion chamber, instead of outside it?
You're right, You'd get more thrust if the combustion was internal. That was one of the short comings of this design. Check out the mark I engine for how to do it more effectively. In a nut shell that aluminium restrictor needs removing.
I'll try to make a pulsejet engine, do you have any comments on suggestion? My main interest is thrust.
Good luck
LBO
I've seen some pictures, the chambers in some large pulsejets can get hot red...
Well, I'll start of with a skateboard rocket. Go to the local skate park and test it out on the ramps... Thanks for all your help.
I'm going to use a s- force fan that spins upto 40,000 rpm and they can lift there self off the ground does anyone have any views on it.
You may also find that it moves air faster than the burn rate of the fuel so the flame front won't maintain in the combustion chamber so you may need to use a flame tube to slow the airflow from the fan enough to maintain the combustion. This is simply a steel tube you squirt the fuel into with holes around the outside to regulate the air flow. If you google "Flame Tube" you should find several examples.
LBO
so it could push me along and I way 8 stone
regards,
Oliver
If you made a hovercraft or other low friction rig then that may be possible but this design will not push you on a conventional bike or go-kart, it just doesn't have the power.
To produce more thrust get the biggest most powerful ducted fan you can and then over volt it slightly, usually you are fairly safe up to around 150% normal operating voltage. Do this at your own risk though as there is a possibility you can blow your motor and it will shorten the motor's life span.
You can also Increase the compression ratio by tightening the venturi inlet to squash the air, i.e. make the cone that goes into the combustion chamber longer and thinner. You can also add a thrust augmenter to the exhaust to increase compression. This would essentially be a cone out of the back of the engine.
The last option is to burn more butane using a regulated calor gas canister or several small cans. You could also something that has a higher energy density than butane like petrol, methylated spirits or paraffin. These are liquid fuels though and need to be atomised before combustion so you need to pressurise the fuel and feed it into the engine via a atomising fuel nozzle.
Hope this helps!
LBO
I'm thinking of making one but I don't want it to blow my hand off... And could I use a fanta can or coke can for the jet engine?Also a hair dryer is 240volts/mains but would it be possible to convert a value hair dryer to 12volts or less?And for the ignition could I use a BBQ push button sparker and wrap the two wires round a drawing board pin then push the pins throw the tin/can so when I turn the hair dryer on, and the gas on I could simply just push the button on the sparker and it would ignite.PLEASE REPLY QUICKLY THANKS AND GREAT IDEA!
Yes, you can convert a hair dryer to run off 12 volts by removing the heating element. It won't be very powerful though. You would be better off using an electronic Ducted Fan Unit like this one: http://www.wheelspinmodels.co.uk/aircraft/item/EFLDF15-Delta-V-69mm-EP-Ducted-Fan-Unit-BAE-Hawk__e4b7/
They are designed to run off 12v and will move enough air.
You could use a BBQ ignition system, that would work well or you could use the capacitative discharge from a disposable camera. They are both good options. On my next engine I will be implementing one of these systems.
The picture on front looks like you've got the right mixture, but one of the later ones has a large yellow flame. What is the difference between these two images, did you add more fuel to make more thrust?
Anyway, it looks very good, and may be my next project....