Search found 1059 matches

by cyberbadger
Thu Jul 29, 2021 2:26 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

I made a few graphs without averaging every 10 samples into one. It doesn't really show any more detail, you just see the errors more clearly. The detail level is ok, but the anomalys above 150psi make the data kind of useless. I was trying to get some baseline data that might help me recognize when...
by cyberbadger
Mon Jul 26, 2021 1:32 am
Forum: Members' Websites and Boats
Topic: Monotube Javelin
Replies: 5
Views: 338

Re: Monotube Javelin

I definitely appreciate that you have made a steam plant light enough to fit in a such a short boat. Serious weight constraints were met to pull it off.

Vey impressive.

-CB
by cyberbadger
Sat Jul 24, 2021 10:34 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

7232021-zoomed.png I feel like maybe the heat is confusing the sensor. This graph is zoomed in on the data, just around the time when the sensor was reporting above 200psi. In this graph If I am understanding correctly each rise and fall is two strokes of this piston. -CB P.S. Well it was only a $2...
by cyberbadger
Sat Jul 24, 2021 10:19 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

My current guess is say above 150psi I think the sensor is getting damaging or causing anomaly's(Non linear response, and this time out of the specified voltage range for the sensor). I just got yesterdays data which was near 200psi, but not above, the safety didn't blow. The data below shows beyond...
by cyberbadger
Fri Jul 23, 2021 9:10 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

RNoe wrote:
Fri Jul 23, 2021 8:21 pm
Transducer calibration?
RussN
It could be. I just am confused how it could be so far off.

It makes me want to put a sensor right on the boiler so I could correlate boiler pressure available to cylinder pressure.

-CB
by cyberbadger
Fri Jul 23, 2021 2:59 am
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

Screenshot_20210722-225333_Sheets.jpg Zoomed in. 20 strokes that much, almost 50 over observed gauge boiler pressure? Could this be back pressure? have a very large 1" steam main that is 10ft+. -CB P.S. Wondering if there was slug flow from carry over? P.S. I think I was confusing the two runs yest...
by cyberbadger
Fri Jul 23, 2021 2:31 am
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

I made a few test runs of Nyitra tonight logging the pressure. On the second run I left at around my MAWP of 200 psi. There was a lot going on and whatever reason the ASME Pressure Relief valve that usually goes off at exactly 200psi didn't, I think I saw 205 PSI on the gauge before I really opened ...
by cyberbadger
Tue Jul 20, 2021 1:57 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

20210720_095416.jpg
20210720_095416.jpg (24.42 KiB) Viewed 188 times
Interesting, the sensor shows after the engine is shut off a vacuum of 10psi develops and then dissipates.

-CB
by cyberbadger
Mon Jul 19, 2021 10:32 pm
Forum: Technical - Engines and Boilers
Topic: digital steam engine indicator
Replies: 120
Views: 69260

Re: digital steam engine indicator

Screenshot_20210719-174805_Sheets.jpg This is over 20-25minutes. The scale is psi. This is impressive to me in that it works and it is the first steam pressure data I have gotten. Just don't consider it the max performance I can or have gotten, it's just preliminary data taking it easy with the eng...