More free plans: 40 pound Chinese

[metiz]

This is the corrected drawing for This engine. Disregard that one

This engine has been mathematically proven to reach approx. 39.8 pounds, asuming you build it to the design specifications!. Some modifications have been made on the original drawing, concluding in these plans wich are sound (ha!)

Nothing more to say, realy, build it, run it, strap it on to something and have fun!


DISCLAIMER!
pulse-jets are VERY loud and VERY hot. hearing protection is MANDATORY and it is advised to run this engine away from heavily populated areas. The heat produced by these engines will burn anything that comes close, including skin. Be VERY carefull, it is not a toy.

By building this engine, you agree to take full responsibility to any and all damage done to people, animals and property. Be save.

[metiz]

Note: The correct plans are now on page 9 of this thread.
viewtopic.php?f=3&t=5628&st=0&sk=t&sd=d#p68932

Posted below are updated Autocat drawings in PDF format. Also posted are pdf documents for all the cone components of this engine wich can be printed and used as a template for their steel counterparts. All these sheet patterns asume a steel thickness of 1mm!

Please be advised that the pdf files have to be printed at 100%, so not cropped to fit the page, to be true sized.This can be doublechecked by measuring the spaces between the lines on the scale posted on every page. They should measure exactly 10 mm.

The remaining pipes (rectifier, tailpipe) can be made using Cone Designer if you want. If you do so, please remember to adjust all the diamters for the 1mm steel you are using. so all the diamters as posted in the plans +2mm

All the documents posted here are created by GRIM in his free time. Thanks alot mate!

sidenote: all the documents have "M40" in their names. That seems like an appropriate name for this engine. Simple, elegant and effective. Thanks again, GRIM!

[ace_fedde]

Ha great!!

I happen to have the bike on the background. Why do I post this here???

[ace_fedde]

I happen to have the bike on the background. Why do I post this here???

Ah! I remember, the engine is missing. I'm looking for engine type: M40-2:

Fedde

[Viv]

Hi Metiz and Grim

Just a word to say thanks for all your hard work to produce these plans and share them on the forum.

Well done guys

Viv

[Barry]

I started to build him.

[GRIM]

Thanks Viv, (just saw this , been busy) theres quite a bit of work in the drawings especially the templates , hope they are useful to someone ,

Hi Barry welcome , please let us know how your build goes,

Joe

[Barry]

I make already 2 pieces....The head with a sparkplug & the cone after the combustion chamber.I'am waiting for the sheet rvs that I command.

SOMEBODY PLEASE TELL ME HOW TO MAKE THE CONE'S!!!!

It stays a really hard work for me to make them.I have a roller machine turned by hand.But they are never nice round..........and they misform by welding.
Every pule-jet I make is very hard word & they are never beautifull!!

[metiz]

I make already 2 pieces....The head with a sparkplug & the cone after the combustion chamber.I'am waiting for the sheet rvs that I command.

SOMEBODY PLEASE TELL ME HOW TO MAKE THE CONE'S!!!!

It stays a really hard work for me to make them.I have a roller machine turned by hand.But they are never nice round..........and they misform by welding.
Every pule-jet I make is very hard word & they are never beautifull!!

als de buizen vervormen na het lassen kun je ze altijd weer recht hameren. als de buis bijvoorbeeld ovaal is geworden kun je een houten, vierkante balk gebruiken om het ovale gedeelte weer recht te hameren. Voordat je gaat lassen kun je ook proberen de buizen zelf al wat ovaal te drukken in de andere richting zodat de vervorming bij het lassen ervoor zorgt dat de buis weer rechtkomt.

als er deuken of oneffenheden in de buis zitten na het rollen, kun je bijvoorbeeld een bezemsteel gebruiken om de deuken eruit te krijgen en een stuk hoekijzer om de overdreven bochten eruit te hameren.

Heb je foto's van de onderdelen waar je het moeilijk mee hebt?

[metiz]

For people who want to build this engine with steel with a diameter different from 1mm, or for some reason don't want to use the patterns, here is a pdf file with the angles for the intake Done by GRIM

[Barry]

Hello Guy's,

So far I'am already.Now I gona to make the holes for the intake's & so I weld them.Than I weld al the rest.
Than just make that stupid BIG cone!!!But I will cut him into 3 pieces,so it will be much easier to rool them.
Here a picture from where I'am now.Sorry for the ugly weldings,but I'am not a good welder , but after some sanding there is nothing to see anymore.



Greetings
Barry

[ace_fedde]

Barry,

Looking great!

Sorry for the ugly weldings,but I'am not a good welder

Don't worry, you're not the only one

Fedde

[Johansson]

Nice work so far!

[metiz]

Good work man, she's shaping up nicely! I can't help but notice that you have convexed (dished out) the endcap. No worries though, won't make a lot of difference. As for the welds: better then mine!

[Barry]

@Metiz : what's "diched out" ????

The big cone is also ready & welded.......All my muscles are very hard right now.

But big disaster......I did something wrong with the exhaust,he is 162mm.Now I have to cut the piece and do again.But that will be not for today.
here a picture.



And this is the equipment that I have for my hobby's: