Andrew Higgins Profile picture
May 18 19 tweets 9 min read
Today, at the Spring Technical Meeting of the Canadian Section of Combustion Institute, @cbkiyanda and I will be hosting a special session featuring the student-team-led propulsion activity across Canada, centered around the @Spaceport_Cup competition.
Opening keynote by Adam Trumpour of @Launch_Canada: There are now 22 university-based student rocket teams across Canada, half of which are now active in development of their own hybrid or liquid bipropellant engines, representing the effort of thousands of students. Image
Adam points out that rocket team activity is now the main student-led engineering activity at many Canadian universities. Adam will be hosting a Canadian-based launch event this August in Cochrane, Ontario, #LaunchCanada. launchcanada.org
Oleg Khalimonov and Alex Robitaille of @SpaceConcordia unveil their 35 kN LOX/kerosene engine, the highest thrust student-built rocket engine in the world. Image
William Nelson of @UCalgary reports on hybrid engine development. The Calgary student team has a strong collaboration with the research lab of Prof. Craig Johansen. Image
Sloan Sobie of the @ubcrocket team is exploring a regeneratively cooled liquid bipropellant engine. Image
Bachar Elzein and my former student William Georges of @Reactiondyn, one of the leading Canadian space launch start-ups. Reaction Dynamics evolved out of a student rocket team at @polymtl. They have been keeping their engine under wraps, but maybe we’ll get some details today. Image
Bachar announced that their first suborbital launch will occur from the coast of Scotland. William showed video of hot fires of Reaction Dynamics’ RE-201 hybrid engine. This is very clean exhaust for a hybrid engine! Image
Orion Moore from @TorontoMet exploring nitrous-ethanol as a propellant combination for a student-designed bipropellant engine. Image
Gabriel Couroux from @polymtl speaking on development of a 5 kN hybrid rocket. Image
Members of the @SpaceConcordia team giving more details of their 35 kN rocket engine testing capabilities, the largest student-developed rocket engine in the world. Image
Note @SpaceConcordia hydrostatic testing of their 35 kN engine being done with a hand pump in a student’s apartment bathtub! Image
I can’t imagine a more motivated audience than these student rocket teams, but Mohammad Ghali of the @mcgillu Rocket Team making sure everyone remembers why we’re doing what we’re doing. Image
Cyril Mani presents a “lessons learned” talk derived from the McGill Rocket Team’s multi-year effort in setting up a rocket test site in the West Island of Montreal (@McGillMacCampus). This is a preview of a more comprehensive talk Cyril will give at #IAC2022 in Paris this fall. Image
While not work done by a student team, there is clearly some cross pollination going on with team activity and academic research at @polymtl in the lab of Prof. Etienne Robert, examining hypergolic ignition of hybrid rocket fuels. Image
.@SpaceConcordia is clearly one of the leading Canadian student rocket team efforts with their Starsailor rocket. Image
And that’s a wrap! Thanks to everyone who participated in our special session on student-led rocket engine development across Canada. Image
Limited funding can be a great stimulus for creativity, and student teams push this maxim to the limit. Operating with budgets orders of magnitude less than even the meanest and leanest start-ups, students are able to leverage… (1/2)
…donated equipment, surplus matériel, borrowed facilities, and a boundless supply of enthusiasm to accomplish engineering development cycles that would traditionally have been the domain of governments. Watch this space. (2/2)

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More from @A_J_Higgins

Aug 5, 2020
Reports are emerging that yesterday’s tragedy in Beirut was the result of the explosion of a store of 2,750 tons of ammonium nitrate (AN). How did we end up with kiloton-sized depots of potential high explosives being stored in cities? A long thread follows.
Tens of millions of tons of AN is produced worldwide every year, predominately as fertilizer and is a basis of our agricultural food chain; it is not going away. AN is often not even classified as an explosive, in fact, it is not even considered flammable:
AN’s usual classification is as an oxidizer. To be used as an explosive, solid AN must be prepared with a specific porosity and other additives, which I’m not going to discuss here to assuage my conscience, but are well-known nonetheless.
Read 25 tweets
Sep 21, 2019
@JFluidMech @cambUP_maths @PeerRevWeek On first read through, try to be sympathetic to the manuscript. We all like to see good papers, so read it hopefully. Similarly, try to start the reviewer's report with a brief summary of the paper (2-3 sentences) and point out its contributions. (1/12)
@JFluidMech @cambUP_maths @PeerRevWeek The summary is important, as it signifies to the authors and editor that you actually read the paper. Next, if there are any major deficiencies or foundational errors, point them out immediately. (2/12)
@JFluidMech @cambUP_maths @PeerRevWeek Reviews should be written similar to how journalists write their copy: with the most important points first and lesser details coming later. (3/12)
Read 13 tweets

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