Få de daglige nyheder fra Version2 og Ingeniøren. Læs mere om nyhedsbrevene her.

close
Ved at tilmelde dig accepterer du vores Brugerbetingelser, og du accepterer, at Teknologiens Mediehus og IDA-gruppen lejlighedsvis kan kontakte dig om arrangementer, analyser, nyheder, job og tilbud m.m. via telefon og e-mail. I nyhedsbreve, e-mails fra Teknologiens Mediehus kan der forefindes markedsføring fra samarbejdspartnere.

Matthias Beckmann

Matthias Beckmann

Rss
Personligt feed med nye kommentarer i tråde, du overvåger:
https://ing.dk/mit/0/kommentarer?token=SdXuNsSCLseZSeg20rnL_IR6pqwN8-SFlqdJgxCzM4Q

Kommentarer

Cryo level gauge

First, thanks to all of CS for the weekend, great show! I know, there was a blog about how to determine the tank level and mybe it was already discussed, but why do commercially available level meters for dewars like this one http://www.cmtbv.nl/ENG/C-stic%20Cryo%20Le... do not work? I think thi...

24. jul 2016 22:51Raketopsendelse i dag 23./7. Update 26./7.: Video

Thanks to all

Obviously thanks to all CS for this test day, but also a big thanks to the stream team and the commentator so I could tune in today. Without any commentary, the waiting between the burns would be quite long.

26. jul 2015 23:05Test af BPM-5 flight-motor 26/7 - Liveblog

Re: streaming from Germany

acually i see, that proxtube works better. So use that from germany for the second test ;-)

10. maj 2015 14:39BPM-5 test 10. maj - liveblog

streaming from Germany

You may use browser addons like Youtube unblocker, that use proxys.

10. maj 2015 13:48BPM-5 test 10. maj - liveblog

Re: Hmm....

I know, I just liked to do the math ;) And please do some SEM inspections of the silica layer, just for cool pictures!

6. maj 2015 12:1342!

Re: Hmm....

But the heat capacity only reduces a little?! Assumption: the mixure of the fluids has a heat capacity according to the one of the unmixed constituents. Ethanol: 2.44 J/g/K, water: 4.18 J/g/K, thus for 75/25 it should be a mix heat capacity of 2.875. For a reduced water content like 95/5 it is 2....

6. maj 2015 10:3342!

Re: Vejen videre

What can be interesting however, is the difference in layer thickness in various places of the tube, which for example can tell you the correlation between temperature and layer thickness. That's acually true, haven't thought about that.

23. apr 2015 22:10Første testrunde med BPM-2

Re: Vejen videre

Jeg forventer et ganske tyndt lag SiO2 på få mikrometer. Det giver en stor kapacitet, som betyder, at I kan klare jer med felter på få cm2 og derfor kan måle mange steder ind gennem røret. Even if a thickness could be measured this way, the assumption of bulk material parameters for this ...

23. apr 2015 19:19Første testrunde med BPM-2

thumbs up

First: thanks for the blog, looking forward to more tests and nice data graphs :-) I don't know if it is more than only "nice to know", if the thickness of the SiO2 is measured. The properties like the dielectrc constant or the thermal conductivety will not be known, since its structural co...

22. apr 2015 0:43Første testrunde med BPM-2

debate on the web

First I have to point out, that it was me who mentioned the elasticity ;-) and secondly: Iøvrigt forstår jeg ikke, hvordan et spørgsmål om tæthed kan afspore debatten, da den jo netop går på, hvordan man skaber tæthed. hm, ... no. "Spørgsmålet er så: Hvad andet, end at ændre på sting-afst...

21. mar 2015 1:46Ingeniørstanden vs. modeverdenen