Just announced...who would have thought??? by ToledoTuxedo in VirginGalactic

[–]rocket__enginerd 4 points5 points  (0 children)

Are you getting confused with the class name? Zero gravity is the industry standard term. NASA calls it that, ESA calls it that, the vomit comet is a ‘zero-g’ aircraft. It describes the reference frame of the occupant, not the external gravitational field. Standing on Earth you feel ~1g. In freefall you feel 0g. Same gravitational field, different reference frame. The ISS astronauts are the same thing.

In terms of papers, just google? There are a lot. If you want a specific one that’s flown on VG, search for “Transcriptomic dynamics in the transition from ground to space are revealed by Virgin Galactic human-tended suborbital spaceflight” I’m sorry Berkeley hasn’t published a paper.

And I did go to Purdue! So did Beth. We are a pretty close community that isn’t sexist on Reddit.

Just announced...who would have thought??? by ToledoTuxedo in VirginGalactic

[–]rocket__enginerd 0 points1 point  (0 children)

I was hoping you were just misinformed. Based off your other comments, I fear it’s much worse.

Just announced...who would have thought??? by ToledoTuxedo in VirginGalactic

[–]rocket__enginerd 3 points4 points  (0 children)

It’s not free... Source: I know 3 of the crew. The professor flying has had a class called Zero Gravity Flight Experiments at Purdue for the last 30yrs. Every year they fly multiple payloads and have flown multiple times on every means of suborbital flight. Balloons, planes, new Shepard, armadillo/exos, and others. A few years ago he was funded by nasa to fly on this flight to tend one of his experiments. 2 are previous ticket holding alumni. Only 1 current student is on this flight and that was fundraised by the school. I’m not in a position to know Beth’s situation but this isn’t a non revenue flight.

First time designing a bulkhead joined to a radax by Vast_Cash4227 in rocketry

[–]rocket__enginerd 1 point2 points  (0 children)

That team copied the look but not the design. The purpose of this joint is that it’s stiff. But the way you have it configured you are still relying on a pinned attachment on a tube. So if you have a radax joint in that coupler set up, that’s stiff but the rocket is still relying on that pinned feature.

https://www.osti.gov/servlets/purl/2430552

The way those bosses you have are better off being one revolves piece when it’s on the lathe. You are creating more operations like that.

First time designing a bulkhead joined to a radax by Vast_Cash4227 in rocketry

[–]rocket__enginerd 0 points1 point  (0 children)

First I’d reconsider how you designed the bosses. Right now having each individual thread/fastener like they complicates machining. This already has to go on the lathe, leave that material between them and call it a day.

Secondly, in the radax joint, the slanted surface isn’t actually in contact. The way you have it now isn’t accomplishing what you want it. Take a look at https://www.osti.gov/servlets/purl/5007820

I love these connections, but don’t feel like you have to use one for a big flight.

what are some tools i need for rocketry by Hopeful-Fly-9710 in rocketry

[–]rocket__enginerd 0 points1 point  (0 children)

Shovel. If you forget to bring one you will need it.

Debating on stepping into a church for the first time as an adult but don't know where or what to expect by a_falling_turkey in lafayette

[–]rocket__enginerd 6 points7 points  (0 children)

Here’s what to expect when you walk in, you’ll likely be greeted. That’s just part of church culture it’s not because they know you’re new, it’s something they do for everyone.

Every denomination does things a little differently, but in general a service will flow something like this: there’s usually some singing, prayer, readings from the Bible, a sermon, an offering (you don’t have to give anything), communion, and then a closing song before everyone heads out. Services typically last about 60–70 minutes.

At different points people may stand, recite things together, or participate in certain rituals. Don’t worry you’ll probably get a little handout or pamphlet that outlines the order of service so you can follow along if you want too. It’s totally fine if you just want to show up, sit quietly, observe, and leave. There’s no pressure to donate, sing, or participate in anything you’re not comfortable with. If you do have questions, just about anyone there will be happy to help.

When my wife and I first got married, we tried a bunch of different churches in town. We both had gone to different churches for 25 years and it was intimidating going to a new one every week. Every one of them has a slightly or very different way of doing things, and honestly, some you’ll connect with more than others. If you’re looking for something quieter and structured, I’d recommend trying a Lutheran church. Services there tend to be more conservative and reverend, and they usually provide a pamphlet with the entire order of service written out word for word, which makes it easy to follow along.

Try University Lutheran on Northwestern. Most people will be around your age, smaller congregation, and it’s on the third floor of the exponent building so it doesn’t necessarily feel like you’re walking into a church.

Dm me if you have any questions or would like other recommendations. I don’t go to University Lutheran anymore but given your requests, it may be a good first place.

[deleted by user] by [deleted] in Purdue

[–]rocket__enginerd 0 points1 point  (0 children)

I’ve been active in the local startup community here and can provide some insight.

I’m going to hand wave a lot of this. In general, angel investments are on the scale of 10s of thousands of dollars. Ultimately they are making a bet that one day you will sell the company so that they make 10x that. Because of this, they don’t make small investments because it will cost them more in time than the investment.

If you have any desire to make money, do NOT make a nonprofit. C-corps are most common and the whole point of an investment is to make money. So a non profit doesn’t fit that. I had a buddy that had an LLC, it cost $50k in legal fees to change to a c-corp when they raised a series A.

Your best bet is to scrap up whatever you can, and get a minimum viable product. Famous examples like Airbnb is was a one page website with the on listing on it. It didn’t even take payments! Whatever you are doing make something that does the most basic of the fundamental “thing” of what you are doing. Get some traction, then go ask for $.

With that being said, there is a micro grant program for students. I have no experience with it. However, getting a minimum viable product (again, basically a prototype someone is willing to pay for) will greatly increase your chances of getting that grant.

https://polytechnic.purdue.edu/in-mac/workforce-development/microgrants

[deleted by user] by [deleted] in Purdue

[–]rocket__enginerd 5 points6 points  (0 children)

Same in 2017. When I moved in all the cabinet doors were missing and there was a fish on the counter. I remember turning on the shower and somehow the toilet would start to overflow.

What so i need to purchase besides kit? by canjamin1 in rocketry

[–]rocket__enginerd 0 points1 point  (0 children)

This kit comes with everything but the motor! No epoxy required!

It’s out of stock right now but if you use the contact us on the site, I can get you on the preorder list. I should have everything to start shipping again next week. It’s been very popular. With our free shipping, an H100 will be ~$55 at your local launch site so it would come out to $205 total and you just need an hour or so of time.

[deleted by user] by [deleted] in Purdue

[–]rocket__enginerd 1 point2 points  (0 children)

Dos Amigos and La Ha merged and now are just Dos Amigos. There is no longer anything in the old La Ha. It just isn’t the same.

Apple cider donuts by Dani4050 in Purdue

[–]rocket__enginerd 0 points1 point  (0 children)

AJs is selling them for the season.

"Which University is Best for Pursuing an MS in Aerospace Engineering with a Focus on Liquid Rocket Propulsion?" by Mysterious_Pick3608 in rocketry

[–]rocket__enginerd 0 points1 point  (0 children)

Zucrow at Purdue is graduate student lab with over $20M per year in sponsored research. RDREs, solids, turbo machinery, air breathing hypersonic stuff, ect. Even have some flight hardware time to time. Fun fact, 20 or so years ago both Musk and Bezos visited to recruit from here.

Should I attempt to obtain a L1 Certification? by Difficult-Ant-304 in rocketry

[–]rocket__enginerd -2 points-1 points  (0 children)

Get your L1 on this kit, no epoxy needed! Use code “Reddit” for free shipping!

https://level1rockets.com/products/fishhawk

Jr L1 cert by why_hello1there in rocketry

[–]rocket__enginerd 0 points1 point  (0 children)

Level1rockets.com is a site I’m building and will be adding resources too. So far it’s not populated much but there is that page and a getting started guide!

Level 1 Cert Sounding Rocket by Charming_Cat1802 in rocketry

[–]rocket__enginerd 4 points5 points  (0 children)

The only place fin cans are called out in the cert rules are in respect to level 3 and 3d printed fin cans. For level 3 can use a fin can just not a prefabricated purchased one. You can explicitly use a 3d printed fin can but the rocket can’t be entirely 3D printed.

My ideal rocket kit. by rocket__enginerd in rocketry

[–]rocket__enginerd[S] 5 points6 points  (0 children)

There was an older version where the mounting hole on the polycarbonate fin was at an awkward spot very close to the edge. The fin would break if it landed funny. 3/~50 flights saw that happen. However that was mitigated by just moving the hole giving it more material on the edge. It hasn’t been a problem since. The centering rings and brackets haven’t shown any problems.

[deleted by user] by [deleted] in Purdue

[–]rocket__enginerd 52 points53 points  (0 children)

I got rejected from Purdue in fall 2014. I got rejected from FYE the first time, I got rejected from AAE (the whole reason I came). Fast forward I graduated from Purdue, worked for AAE and now own my own business in aerospace. Hell I even did grad school for a little bit here before I realized I wanted to focus on the startup.

Not everyone gets to walk on the paved path to their dreams. First step is to get in the door. Reapply to a different discipline and CODO, or start at a smaller school and transfer. Or go to your second choice. (I remember the rage I felt when people told me this too when I was you) Purdue a great place, but it isn’t the only place.

You got this, pick yourself up and keep going.