Safely in Utah

Just wanted to let everyone know that I made it out to Utah today. I’ll be defending my thesis on Tuesday, so I’ve got a couple of days to put together my presentation, and polish up the thesis a bit. I’ll be out here till around the 7th or so, with the hope being that after the defense, I can take care of any needed paperwork, as well as possibly getting the final thesis revision polished and submitted to the Library. If all goes well, I may head home with everything signed off for graduation in August.

Tiff and the boys have been gone for the past two weeks being up with Tiff’s parents in Oregon, and they’ll be driving down with my sister Monday to meet up with me. It’ll be really nice to see them all again–“baching it” is so overrated.

On a thesis related note, last week I stumbled on one last piezoceramic ring while digging through an old box of receipts, and was able to get the nozzle machined to match. Mike Massee and Charles Pooley came over to help me run the last experiment. The results were mixed, but generally positive. We were able to get the jet to modulate, but the modulations appear to have damped out after a short distance:

This was with glycerin at about 500psi feed pressure, and about a 120-150V driving voltage just below the electrical resonance point. The good news is that it is very clear that there was jet modulation going on. It just would’ve been better had it broken up into droplets. In hindsight, it appears that by using a fluid as viscous as glycerin, that the viscous effects dominated the inertial ones enough to cause the jet to resmoth. Water on the other hand (as you could see from my previous post) caused an unsteady enough “steady” jet to make measurements difficult. Maybe I could’ve split the difference and tried a water-glycerin solution.

Anyhow, while it wasn’t ideal, and while it definitely points to the need for some future model refinements, it did validate part of the concept, and some of the observed behavior matched the expected trends, even if the amplitudes were off in magnitude….

Anyhow, that’s a lot of data for me to finish absorbing and wrapping into my thesis, but wish me luck!

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Jonathan Goff

Jonathan Goff

President/CEO at Altius Space Machines
Jonathan Goff is a space technologist, inventor, and serial space entrepreneur who created the Selenian Boondocks blog. Jon was a co-founder of Masten Space Systems, and is the founder and CEO of Altius Space Machines, a space robotics startup in Broomfield, CO. His family includes his wife, Tiffany, and five boys: Jarom (deceased), Jonathan, James, Peter, and Andrew. Jon has a BS in Manufacturing Engineering (1999) and an MS in Mechanical Engineering (2007) from Brigham Young University, and served an LDS proselytizing mission in Olongapo, Philippines from 2000-2002.
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3 Responses to Safely in Utah

  1. john hare says:

    Good luck and good hunting.

  2. Habitat Hermit says:

    Best of luck!

    I hope you get to continue work and refinement on the topic down the road after Masten becomes a roaring success ^_^

  3. Anonymous says:

    GOOD LUCK! You have performed a massive amount of work in such a short period of time! I am impressed!

    Perhaps you could slowly continue the experiments to build up a data set in which to make adjustments to your model.

    Was wondering if some of the information is/will be proprietary. Excuse my naivety, but what use did you have in mind for such work. Kinda reminds me of a high volume ultrafast inkjet. 🙂

    Would love to read it when it is finally accepted.


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