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Author Comment Last activity Moderation
danbeavers "Do you think if you moved the weight further down the line from the kite it would be more stable? " | Read more » about 7 years ago
danbeavers "Even though you have it in the refrigerator I suspect that it is the result of time and perhaps humidity. I have left my used tube lying around in..." | Read more » about 7 years ago
danbeavers "Just if you use the volume of a bag keep in mind the Combined Gas Law. " | Read more » about 7 years ago
danbeavers "Then my other concern is how does the used tube flow rate change over several days or weeks since there are chemical reactions occurring that might..." | Read more » over 7 years ago
danbeavers "It appears that you believe this setup will flow 9 liters in 30 minutes. Perhaps I missed the data but I thought there was significant variation b..." | Read more » over 7 years ago
danbeavers "An additional site http://www.discriminator.nl/ais/index-en.html and http://www.discriminator.nl/index-en.html show how to do it with any radio tha..." | Read more » over 7 years ago
danbeavers "Probably just pressure would be sufficient. I am not certain but there is probably a constant relationship between pressure change rate and speed/..." | Read more » over 7 years ago
danbeavers "I reviewed the design and there is no port and starboard control. That could be accomplished by changing the center of gravity to the left or righ..." | Read more » over 7 years ago
danbeavers "I believe it would be better to just store the data and use dead reckoning between fixes. That assumes you get GPS on each surfacing. " | Read more » over 7 years ago
danbeavers "@warren How do you start the timer? I don't see a sensor for the start, only the end. Another set of electrodes appear necessary. Will that set ..." | Read more » over 7 years ago
danbeavers "It appears you need some more ventilation or perhaps start using the remediation process. http://publiclab.org/notes/nshapiro/10-20-2014/diy-indoo..." | Read more » over 7 years ago
danbeavers "@mathew What do you mean by " small control orifice into a brass rod and put it at the intake"? I hope you are thinking manometer . . . What I s..." | Read more » over 7 years ago
danbeavers " @mathew That heart shaped object is the abrasive chip. When @nshapiro and I did my first measurement Nick said the scoring chip should be in the..." | Read more » over 7 years ago
danbeavers "@davidmack I don't know how much vacuum a 5lpm pump will produce but it needs to generate "below 7psia" to get sonic or choked flow. An aquarium ..." | Read more » over 7 years ago
danbeavers "Looks like you had problems breaking the tip of the tube. What process did you use? I am really curious to find out how much flow variation there..." | Read more » over 7 years ago
danbeavers "After further discussions with my mechanical engineer friend: If you use the manometer with tees and an orifice between them the orifice should be..." | Read more » over 7 years ago
danbeavers "http://www.seeedstudio.com/recipe/241-automatic-water-level-controller.html?utm_source=EDM&utm_medium=EDM&utm_campaign=EDM20150531 is anoth..." | Read more » over 7 years ago
danbeavers "Another observation: It would be good to have a check list for the measurement. For example: Verify that the humidity is above ?? and below ??..." | Read more » over 7 years ago
danbeavers "@Mathew I just added a note from a mechanical engineer friend about orifice size to the http://publiclab.org/notes/nshapiro/11-03-2014/diy-formald..." | Read more » over 7 years ago
danbeavers "@Mathew The following is from a mechanical engineer friend of mine: Assuming you could pull a reasonably good vacuum on the orifice, you could ge..." | Read more » over 7 years ago
danbeavers "To be a little more precise about "(potentially) remove the most expensive component, the flow control valve." I have not priced them but an aquar..." | Read more » over 7 years ago
danbeavers "Nick: I am not disputing your background observation but why do you think the vendor says a light background and compare it to an unused tube? " | Read more » over 7 years ago
danbeavers "Mathew: That sounds like a mechanical engineer (which I am not) question. I SUSPECT that it will be the sum of the restrictions because of the lo..." | Read more » over 7 years ago
danbeavers "Perhaps @Stevie could order them. " | Read more » over 7 years ago