NUDiS

Moderator: Mike Everman

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

re: NUDiS

Post by Graham C. Williams » Thu Nov 23, 2006 12:36 am

Some instructions.

Graham.
Attachments
1 SETUP.rar
(236.6 KiB) Downloaded 541 times

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

re: NUDiS

Post by Graham C. Williams » Thu Nov 23, 2006 10:21 am

Talking to Rossco this morning. He has some interesting experiances with this program. I look forward to hearing more.


Graham.

Mike Everman
Posts: 4906
Joined: Fri Oct 31, 2003 7:25 am
Antipspambot question: 0
Location: santa barbara, CA
Contact:

re: NUDiS

Post by Mike Everman » Thu Nov 23, 2006 3:06 pm

Hi Graham,
I'll be testing this public release version this weekend!
Mike
__________________________
Follow my technical science blog at: http://mikeeverman.com/
Get alerts for the above on twitter at: http://twitter.com/mikeeverman

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

re: Starting Escopettes or motors with Long induction Pipes

Post by Graham C. Williams » Tue Nov 28, 2006 1:23 am

Escopette style motors can be difficult to start, positive or negative pressure. Cold air just about makeing it to the combustion chamber then going back again.
For negative pressure starting one or all of the following will get sufficient charge into the combustion chamber to start these motors. The Pressures, Temps and Velocities will settle to more normal values after a few cycles.
1) If the motor has a cone on the front of the induction pipe, make it a straight pipe. Often this conical induction opening will start a shock and the motor will fail.
2) From the open end of the induction pipe to about middle of the motor set the starting gas temp to 2000K. More normal values for the rest of the motor.
3) Most motors will start with an initial gas velocity of Zero throughout the motor. If you’re still having trouble set the initial gas velocity in the bustle section of the tail to 10m/s.

Graham
Last edited by Graham C. Williams on Tue Nov 28, 2006 9:53 am, edited 1 time in total.

Rossco
Posts: 589
Joined: Fri Nov 28, 2003 12:16 pm
Antipspambot question: 0
Location: Australia, Brisbane
Contact:

Post by Rossco » Thu Feb 22, 2007 2:41 am

Hi Graham,
I have been doing much playing with NudIs now. The times i get it going right, i have been rewarded with much information, good ideas and goals for the ever present "next build ill do this".
I am having a lot of trouble with it being very unstable. Time out error, time out error, grrrr. I know its just doing what i tell it to, but cant it work out what i mean, rather than what i say!

I havnt seen you around for a while, although i would like to have a quick conversation with you at some stage when you have some time.
I have had my engine running in NudIs once! although i did not save the exact configuration. As you would understand, it does make an ablselute mess of information to unravel, although the base operation is accurate to reality, engine frequency is spot on, and so is overall intake frequency and expected v. Individual intake cells are showing what i expected, as well as what i have deduced from recordings of it running.
Very interesting. On the model that ran, it calculated 36Lbs... thats what im after. (in reality im getting quite a bit less than this) Very good for a small engine.
Hope to talk to you again soon.

Everyone else, get into this! It is an amaizing tool to learn from, if only a little frustrating. Its much quieter than actualy running a pulse jet, and will teach you a lot in terms of what is going on in there.
Another thing, i would like to find what is the best system to run it in. Im thinking dedicated server or something, to drop the run time a little. Anyone have some ideas?

Rossco
Big, fast, broke, fix it, bigger, better, faster...
[url=callto://aussierossco]Image[/url]

Rossco
Posts: 589
Joined: Fri Nov 28, 2003 12:16 pm
Antipspambot question: 0
Location: Australia, Brisbane
Contact:

Post by Rossco » Tue Mar 13, 2007 12:44 am

Hi Graham,

Just saw your post on the FWE thread.
Yes, James (Irvine) and i have some suggestions... although they are more questions and missunderstandings than anything.

Look foward to speaking to you soon, im online now.
(check the button in my signature to check this at any time)
You can also just click on that button and it should call me.

Rossco
Big, fast, broke, fix it, bigger, better, faster...
[url=callto://aussierossco]Image[/url]

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

NUDiS Public Release 02

Post by Graham C. Williams » Tue Apr 03, 2007 4:18 pm

Dear NUDiS user.
I've made some much-needed modifications to the Construction Book and Analysis Book.
(As far as I can tell) the Dynamic change section now reports the correct motor length under all conditions.
The cones generator is also a little more efficient.
Generally the code runs a little more efficiently.

Please report any problems you may have.
Enjoy.

Graham.
Attachments
NUDiS Public Release02.rar
(502.36 KiB) Downloaded 492 times
Dark days nurture new
light. Productions begin.
Now open your eyes.

Irvine.J
Posts: 1063
Joined: Mon Jun 05, 2006 4:28 pm
Antipspambot question: 0
Location: Brisbane, Australia
Contact:

NUDIS!

Post by Irvine.J » Tue Apr 03, 2007 11:11 pm

Graham! THANK YOU OH SO VERY MUCH!
I'd be happy to paypal you a round of drinks at your local establishment.
Glad to see your still working on it.
James- Image KEEPING IT REAL SINCE 1982
http://pulseairdefence.com
[url=callto://project42labs]Image[/url]

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

Re: NUDIS!

Post by Graham C. Williams » Wed Apr 04, 2007 11:49 am

Irvine.J wrote:Graham! THANK YOU OH SO VERY MUCH!
I'd be happy to paypal you a round of drinks at your local establishment.
Glad to see your still working on it.
DONATIONS. Yes Please.

And Thank You for Your Kind Offer. I'll raise a glass of Fine Dark Porter in your name.

All Paypal Donations to the NUDiS project can be made in the usual way by going to Paypal.com and making a payment to this address:

graham@speechrecordings.co.uk


Best Regards
Graham.
Dark days nurture new
light. Productions begin.
Now open your eyes.

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

Thrust Measurement Notes.

Post by Graham C. Williams » Wed Apr 04, 2007 12:10 pm

In responce to suggestions I've added these thrust measurement notes.

Graham.
Attachments
Thrust Notes.doc
(39.5 KiB) Downloaded 429 times
Dark days nurture new
light. Productions begin.
Now open your eyes.

Irvine.J
Posts: 1063
Joined: Mon Jun 05, 2006 4:28 pm
Antipspambot question: 0
Location: Brisbane, Australia
Contact:

NUDiS!

Post by Irvine.J » Wed Apr 04, 2007 12:53 pm

I just sent you, hopefully enough for you to have a drink for me, seeing as I can't be there with you.
Maybe one day :-)
Anyway, thanks for sharing your programme, its great.
Regards,
James.

P.s: Paypal is kinda slow but should arrive within a few days.
James- Image KEEPING IT REAL SINCE 1982
http://pulseairdefence.com
[url=callto://project42labs]Image[/url]

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

A pint of Porter.

Post by Graham C. Williams » Wed Apr 04, 2007 8:27 pm

Dear James.
It's come through. Thanks very much.

Porter is a type of Beer, see:
http://beeradvocate.com/news/stories_read/305/

It's very nice.

Regards
Graham.
Dark days nurture new
light. Productions begin.
Now open your eyes.

Irvine.J
Posts: 1063
Joined: Mon Jun 05, 2006 4:28 pm
Antipspambot question: 0
Location: Brisbane, Australia
Contact:

NUDiS question

Post by Irvine.J » Fri Apr 06, 2007 2:40 pm

Dear Graham,
I've been doing a significant amount of nudis runs lately, and have noticed something that I am unable to decipher and request your assistance.

When go to the C-dat viewer and try to calculate thrust, heres what I do, please correct any mistake I might be making. I've read your thrust document, and follow it, plus a few other things.

Firstly, I click "Cells" in the parameters box.
Then I select the cells from the start of the CC,
then at 254 (right at the back of the tailpipe). I then align my thrust lines in proper intervals like you mentioned, and take a reading. My bend location is usually 20 to 24 on an inline engine such as the lady anne. (In the intake.) Selecting 2 to 4 waves, lets say for example, it gives 4.5 lbs.

I then move the thrust lines closer to the end of the wave (on the right.) I do 1 interval or "wave" like you mention, and get 6.2lb thrust with the final wave selected.

I then select only the CC cells with the sliders again, set my bend location, and do the same (4 or 6 interval) and 1 interval measurments. The same trend occures again. To the right or far end, the wave calculations always seem to be much greater.

So I guess the question is,
-Where should we decern the realistic thrust figure when selecting the waves on the graph to measure?

-Also, do you do your measurements with selected cells, or with "parameters" selected?

-Would you assume the value you get from 1 wave to be more accurate then selecting 2 or 4 waves?

-Do you normally use "Parameters" when calculating thrust, select many cells before measurement, or use cells and select 1 or 2 cells in the CC?

One final thing...
I often get greatly varied linear and differential thrust.
-What is the difference?
-Are we aiming for higher linear then differential?
-Should one ALWAYS be higher then the other?

These questions I'm desperate to know, i've saved nearly 20 runs, and want to go over them very carefully with a fine tooth comb.
Best regards,
Thanks for your help.
James.
James- Image KEEPING IT REAL SINCE 1982
http://pulseairdefence.com
[url=callto://project42labs]Image[/url]

Graham C. Williams
Posts: 571
Joined: Fri Oct 03, 2003 11:33 pm
Antipspambot question: 0
Location: England
Contact:

Post by Graham C. Williams » Fri Apr 06, 2007 7:54 pm

Hi James.
I've sent you an email. Answers to your questions and a lot more.

Graham.
Dark days nurture new
light. Productions begin.
Now open your eyes.

Rossco
Posts: 589
Joined: Fri Nov 28, 2003 12:16 pm
Antipspambot question: 0
Location: Australia, Brisbane
Contact:

Vista

Post by Rossco » Sun Apr 08, 2007 10:17 am

Well, as far as i can tell, Nudis does not/will not run on Vista.
Then again, im finding that most things dont at first, untill some major tweeking is done, and then they still may not, or are not stable.
I did get it to start into the process, untill it couldnt find a file and crashed, and it ran STUPIDLY slow... so much for the new system being powerfull, Vista... mmmm, no public comment at this moment.

OK, fist post off this machine... maybe... unless Vista says (again) that my router is unrecognised and i should replace it... again.

Rossco
Big, fast, broke, fix it, bigger, better, faster...
[url=callto://aussierossco]Image[/url]

Post Reply