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Re: The M25

Posted: Tue Aug 10, 2010 4:30 pm
by metiz
Thanks :)

Re: The M25

Posted: Tue Aug 10, 2010 5:51 pm
by PyroJoe
Thanks for building and sharing,
Good stuff!

Re: The M25

Posted: Wed Dec 07, 2011 9:36 pm
by turbinepower
hello Metiz good work,i am a newcomer by pulse jet engines.I am very interessd to come in touch with you.I looking for one 5 kg thrust pulse jet,maby you can help.
thanks very much

Re: The M25

Posted: Mon Dec 12, 2011 4:31 pm
by kevin lee
Hey turbinepower these links maybe of use. These are designs I have that should be good for us newbies ... -pulse-jet

One of Larry' designs


Beck tech designs iirc

3lb thermojet jet
Advanced fwe
12lb Chinese

Maybe someone can confirm whether these are legit for beginners?

Re: The M25

Posted: Mon Dec 12, 2011 4:33 pm
by kevin lee
I have read through this thread, nice pj but looks like I would need some experience before jumping in :)

Re: The M25

Posted: Fri Jan 13, 2012 10:21 am
by kevin lee
Hi Metiz, I noticed you have posted in the last day or 2. Hope you don't mind me bothering you about this engine!

Have you weighed this engine and what gauge stainless steel is it constructed from?

Also are you able to release some plans too me?


Re: The M25

Posted: Fri Jan 13, 2012 12:54 pm
by metiz
The plans are freely available, just can't find them back on the forum...look for the attachement in this post. The engine has been constructed from 1mm 304 stainless steel. Never realy weighed the engine but I think it's around 3 pounds. You can round off the dimensions to 1 digit behind the period e.g., 39.356 = 39.4

Make sure you follow the plans as close as possible.

If you're having trouble with some of the layouts (like with the choke cone and the hole alignment) let me know.

Re: The M25

Posted: Sat Jan 14, 2012 2:53 pm
by kevin lee
Bedankt Metiz

Iam very greatful of your help, and iam sure ill be asking more questions regarding this design.

Infact do you have any thing to add regarding the use of petrol/gasoline? I have ideas of making some kind of stupid rc plane and flying this engine :D


ps. i have had a little search and been unable to find where the plans were posted orignally but i should be able to get on ok with the above drawing.

Re: The M25

Posted: Sat Jan 14, 2012 4:22 pm
by metiz
If I knew how to fuel this engine efficiently with liquid fuel I'd be flying it myself. It's very hard to do. I have some ideas and a somewhat promising prototype but all testing has been put on hold indefinitely.

Re: The M25

Posted: Sat Jan 14, 2012 8:54 pm
by kevin lee
Not a problem, i understand!

i think i will build an m25 or m40 for fun, and build a valved atomjet ect for flight, i can always go back to the m25 if i figure out how to liquid fuel it.

or maybe i should make that the task, a liquid fuel solution so that it can be flown!!

too be honest i dont think i have enough experience at this moment. maybe in a year or two ill have some ideas :)

Re: The M25

Posted: Thu Oct 30, 2014 8:09 pm
by metiz
I was messing around with a liquid fueled M25 a couple of years back. I never realy properly tested it but I did build a single intake version of the engine so here are the plans if anyone's interested (all dimensions internal)

Re: The M25

Posted: Thu Oct 30, 2014 9:39 pm
by brownms
Thank you very much.



Re: The M25

Posted: Thu Nov 13, 2014 7:17 pm
by metiz
Anular M25. Lets see if this is going to work.