Search found 49 matches

by Axel Borg
Thu Apr 13, 2017 6:23 am
Forum: Gas turbine forum
Topic: 3D-printed jet engine, sort of...
Replies: 5
Views: 1676

Re: 3D-printed jet engine, sort of...

In some wierd way 3-d Printing is both useless AND indispensable......
by Axel Borg
Thu Feb 04, 2016 11:49 am
Forum: Gas turbine forum
Topic: 3D-printed jet engine, sort of...
Replies: 5
Views: 1676

Re: 3D-printed jet engine, sort of...

New video running the Engine from a cigarette lighter refill canister:

https://www.youtube.com/watch?v=_X_ctwt ... detailpage
by Axel Borg
Wed Jan 13, 2016 9:39 am
Forum: Gas turbine forum
Topic: 3D-printed jet engine, sort of...
Replies: 5
Views: 1676

3D-printed jet engine, sort of...

Just wanted to share my most recent gas turbine build, I call it "The Hair Fryer" :-)
STL-files etc. will soon be available.

https://www.youtube.com/watch?feature=p ... y6MR2HR_Fs

or

https://www.youtube.com/watch?v=_y6MR2HR_Fs
by Axel Borg
Sun Sep 18, 2011 7:41 pm
Forum: Rocket forum
Topic: Pulse jet rocket, first flight (ever?)
Replies: 9
Views: 4785

Re: Pulse jet rocket, first flight (ever?)

Thank you guys!

Just barley entered the flight test phase. All technical details will be in the book to come.
During this very first flight the engine ran on pure propane. I have been experimenting with
propane-diesel mix that seems promising. The exhaust smells jet-ish in a lovely way as well…
by Axel Borg
Sat Sep 17, 2011 6:14 pm
Forum: Rocket forum
Topic: Pulse jet rocket, first flight (ever?)
Replies: 9
Views: 4785

Pulse jet rocket, first flight (ever?)

In progress...

http://www.youtube.com/watch?v=abr2Pt7SGi4

It is not perfect, but it flies!
by Axel Borg
Thu Jul 15, 2010 9:07 pm
Forum: Unconventional, Multi-Mode and Hybrid Jets
Topic: Motor jet, afterburning EDF
Replies: 4
Views: 3264

Re: Motor jet, afterburning EDF

I just have to show you guys what I did yesterday, even though it is off topic:

http://www.youtube.com/watch?v=8rY2VDB4Gw4

/Axel
by Axel Borg
Tue Jul 13, 2010 9:33 am
Forum: Unconventional, Multi-Mode and Hybrid Jets
Topic: Motor jet, afterburning EDF
Replies: 4
Views: 3264

Motor jet, afterburning EDF

Hi People have been asking for more information regarding an EDF afterburner shown on you tube, and I thought that it might be of interest for some members of this forum as well. The kit is out of stock, but the original building instruction that came with the kit is now available as a free download...
by Axel Borg
Wed Dec 23, 2009 6:33 am
Forum: Gas turbine forum
Topic: FD3/64-2:1!
Replies: 64
Views: 23580

Re: FD3/64-2:1!

Thanks! I was glad when you showed up earlier in the tread, I kind of thought that I would have issues that I would need expertise help to straighten out..... but so far, so good! Yes, I will re-position the setup on the test bench in higher speed runs further on so that I do not stand in harms way....
by Axel Borg
Tue Dec 22, 2009 7:32 pm
Forum: Gas turbine forum
Topic: FD3/64-2:1!
Replies: 64
Views: 23580

Re: FD3/64-2:1!

So I finally bought a 1000C max K-type sensor needed to measure the EGT. I have only conducted a few measurements at rather low throttle settings so far. At around 14k rpm the hottest spot directly behind the turbine (20mm away from the turbine blades) is 590C. I have to make further tests with a la...
by Axel Borg
Mon Dec 21, 2009 5:59 pm
Forum: Gas turbine forum
Topic: FD3/64-2:1!
Replies: 64
Views: 23580

Re: FD3/64-2:1!

I changed the needle size from 0.33mm to 0.25mm. The throttle control is better now as a result of the change.There is a little throttle lag compared to running on LGP. I ran the motor up to 22.500rpm which is about 60% of full speed, in this 2:1 build. I’m still using the 0.5mm thin turbine wheel. ...
by Axel Borg
Fri Dec 18, 2009 5:56 pm
Forum: Gas turbine forum
Topic: FD3/64-2:1!
Replies: 64
Views: 23580

Re: FD3/64-2:1!

The Schreckling design is not bad, and with a total of about 2 meter stainless steel vapour sticks the diesel turns into flammable white smoke! I’m practicing the starting procedure and can now easily start the motor with a small disposable butan/propan bottle as preheat source. This makes every thi...
by Axel Borg
Thu Dec 17, 2009 5:38 pm
Forum: Gas turbine forum
Topic: FD3/64-2:1!
Replies: 64
Views: 23580

Re: FD3/64-2:1!

Still waiting for the thicker SS material to arrive. In mean time I made a turbine of even thinner 0.5mm stainless steel...which works fine as a test turbine. I have put a thicker plain steel washer in the centre to stabilize the flimsy turbine disc though... I fixed the fuel leak and run it success...
by Axel Borg
Sun Dec 13, 2009 9:01 pm
Forum: Gas turbine forum
Topic: FD3/64-2:1!
Replies: 64
Views: 23580

Re: FD3/64-2:1!

Right now I’m waiting for some thicker SS material for a new more rigid turbine to arrive. I did a shorter test run on pure diesel anyway, and it seems promising. I had a serious hot spot that I think is related to a leak in the fuel line that I have to fix before next attempt. One thing that was di...
by Axel Borg
Sun Dec 13, 2009 8:46 pm
Forum: Gas turbine forum
Topic: FD3/64 in Pro Desktop
Replies: 5
Views: 2323

Re: FD3/64 in Pro Desktop

Looking good!

The compressor diffuser vanes are pointing in the wrong direction though.

/Axel
by Axel Borg
Wed Dec 09, 2009 6:15 am
Forum: Jet Vehicles, All Types
Topic: Electric dragster
Replies: 1
Views: 1585

Re: Electric dragster

You sure could have fun with a pair of those! :D

/Axel