Go Back  RCU Forums > RC Airplanes > RC Jets
Reload this Page >

GE runs firsts tests on 3D-printed micro turbine

Notices
RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

GE runs firsts tests on 3D-printed micro turbine

Old 05-12-2015, 03:13 AM
  #1  
JSF-TC
Thread Starter
My Feedback: (2)
 
JSF-TC's Avatar
 
Join Date: May 2002
Location: Fort Worth, TX
Posts: 980
Likes: 0
Received 1 Like on 1 Post
Default GE runs firsts tests on 3D-printed micro turbine

http://www.flightglobal.com/news/art...urbine-412179/


GE Aviation has run a 3D-printed micro jet turbine up to 33,000rpm, marking the first known test of a jet engine built using additive manufacturing.

The project and test revealed on 7 May launched with a jet engine designed for the hobbyist, remote-controlled aircraft market, GE says in a video posted online on 7 May.

The company used EOS M270 machines and a direct metal laser melting process to build about a dozen major components, including a centrifugal compressor stage. Some additional machining and polishing work was required after the components emerged from the 3D printers. The materials included “high-strength, high-temperature alloys” that are usually unavailable to the hobbyist engine market, GE says.



Video

http://www.mmsonline.com/blog/post/v...-manufacturing
Old 05-12-2015, 03:56 AM
  #2  
GrayUK
Senior Member
 
GrayUK's Avatar
 
Join Date: Oct 2003
Location: Dunstable, UNITED KINGDOM
Posts: 3,598
Likes: 0
Received 0 Likes on 0 Posts
Default

Love it... I have been forecasting these breakthroughs for the last 18 years of my involvement in the technology!
Great to see it
Old 05-12-2015, 05:21 AM
  #3  
sc0tt
My Feedback: (61)
 
sc0tt's Avatar
 
Join Date: Apr 2005
Location: ORD
Posts: 537
Likes: 0
Received 0 Likes on 0 Posts
Default

Fyi, here's the 2014 post on this...
http://www.rcuniverse.com/forum/rc-j...ne-engine.html
Old 05-12-2015, 05:22 AM
  #4  
why_fly_high
My Feedback: (19)
 
Join Date: Mar 2002
Location: Edmond, OK
Posts: 683
Likes: 0
Received 0 Likes on 0 Posts
Default

Are they indicating that GE is getting into the hobby turbine market?
Old 05-12-2015, 05:43 AM
  #5  
FalconWings
My Feedback: (57)
 
FalconWings's Avatar
 
Join Date: Mar 2002
Location: Fort Worth, TX
Posts: 6,927
Received 0 Likes on 0 Posts
Default

Iroincally enough, I beat GE at their own game. I actually designed and incorporated the first Electron Beam Melting component to be used on an aircraft engine (a GE Engine as a fact), and will actually fly on a vehicle (a very, very, bad ass vehicle).

Unfortunately it will not make me rich, nor famous, nor get me a better job nor buy me the EV5 valve that I really need right now. It is just ink on my 4 page CV.

And yes, the parts come out a lot worse than casting grade surface finish, so depending on the application there will need to be a lot of post forming finishing work, even some traditional machining may be required.

Love this stuff!
Old 05-12-2015, 07:41 AM
  #6  
dbsonic
My Feedback: (3)
 
dbsonic's Avatar
 
Join Date: Oct 2005
Location: san jose, CA
Posts: 877
Likes: 0
Received 0 Likes on 0 Posts
Default

https://www.youtube.com/watch?v=W6A4-AKICQU
Old 05-12-2015, 03:38 PM
  #7  
Terry Holston
My Feedback: (1)
 
Terry Holston's Avatar
 
Join Date: Dec 2001
Location: Fort Wayne, IN
Posts: 3,757
Likes: 0
Received 0 Likes on 0 Posts
Default

But, But, 33K Rpm is less than my Wren's Idle..........alll of them.........Come back and tell us about it when they get at least 120K out of it. Looks neat though........LOL
Old 05-12-2015, 04:21 PM
  #8  
T Brooks
 
Join Date: Nov 2007
Location: Tokomaru, NEW ZEALAND
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
Default

The parts that they show being printed are only the two side mounts with the GE log and something that goes over the front cover. They dont show the manufacture of any of the hot parts or any spinning parts. This is not to say they didnt do it ... just they didnt show it.

Also did you spot the assembly error at about 1:15 to 1:17. He tries putting the NGV over the already fitted turbine.

T
Old 05-12-2015, 07:33 PM
  #9  
FalconWings
My Feedback: (57)
 
FalconWings's Avatar
 
Join Date: Mar 2002
Location: Fort Worth, TX
Posts: 6,927
Received 0 Likes on 0 Posts
Default

It's just a marketing tool. Most folks would believe that the whole thing is printed. Reality is, traditional methods like stamping and forming are essential for hot and high speed applications. EBM is great for casting grade parts, as it can reduce tooling costs significantly. But it is no substitution for 5 axis machining.....at least not yet.
Old 05-13-2015, 08:57 AM
  #10  
erbroens
 
erbroens's Avatar
 
Join Date: Nov 2003
Location: Curitiba, Parana, BRAZIL
Posts: 4,248
Likes: 0
Received 2 Likes on 2 Posts
Default

Suppose this will be the standard... Both additive and substractive tech (3d printing and machining) in the same machine:


Would make a complete scale F-18 landing gear in a day, and one or two turbines in the weekend.



https://www.youtube.com/watch?v=ndx-amkf4qU
Old 05-14-2015, 10:35 PM
  #11  
Turbotronic
 
Join Date: Aug 2009
Location: Cape Town, SOUTH AFRICA
Posts: 470
Likes: 0
Received 0 Likes on 0 Posts
Default

Pity they did not know this has been done years ago already. And they assembled the combustor the wrong way round....
SLS in super alloys is more than a decade old. We use EOS machines for printing titanium and the finish is good.
Most popular application is for printing injection mold inserts with cooling channels so efficient cycle times can be doubled.
Old 05-18-2015, 03:33 AM
  #12  
GrayUK
Senior Member
 
GrayUK's Avatar
 
Join Date: Oct 2003
Location: Dunstable, UNITED KINGDOM
Posts: 3,598
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Terry Holston View Post
But, But, 33K Rpm is less than my Wren's Idle..........alll of them.........Come back and tell us about it when they get at least 120K out of it. Looks neat though........LOL
I think the 33k is an error in the article and I have already fed this back to them.
I don't think it would self sustain at that rpm.
My guess is that it should read 133k.

Paul G
Old 05-18-2015, 11:26 PM
  #13  
Jgwright
 
Join Date: Jul 2006
Location: Norfolk , UNITED KINGDOM
Posts: 1,406
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Turbotronic View Post
Pity they did not know this has been done years ago already. And they assembled the combustor the wrong way round....
SLS in super alloys is more than a decade old. We use EOS machines for printing titanium and the finish is good.
Most popular application is for printing injection mold inserts with cooling channels so efficient cycle times can be doubled.
Actually the guy did not assemble the chamber in the engine the wrong way round.
If you look very carefully frame by frame this is all an illusion and a not very good one. At frame 1.16 - 1.17 you can see that the rear end of the chamber where the NGV fits in is in its correct place. However the outer wrapper has the large cooling holes cut at the front and the small ones that should be at the front are at the rear. The glow plug hole was made at the rear of the outer wrapper when you would expect it to be at the front. Indeed if you look at the video of the first run you will see the glow plug is in its correct place, so the alleged first run was with a different chamber.

My guess is that someone programmed the software incorrectly for the chamber and they did not have time to remake the parts. The fuel supply appears to be a single gas pipe welded into the rear of the case and it passes though the rear of the case in an unsealed hole.

There is a storage lack of heat and that indicates to me that this just had the engine spun up with the gas lit up for show. They then spun up to 33K with compressed air. There is just a whine from compressed air and no sound of combustion sound or heat.

John

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.