rharshberger
Well-Known Member
Had to go look up "flounce", that's freakin hilarious!Aw, he admitted we called his bluff and flounced. I was hoping for the "I can't tell you because of ITAR" card.
He wasn't as fun as I thought.
Had to go look up "flounce", that's freakin hilarious!Aw, he admitted we called his bluff and flounced. I was hoping for the "I can't tell you because of ITAR" card.
He wasn't as fun as I thought.
Can it ya' fl.oz-ie!Wait .. . it is not a fluid ounce?
Like how many flounces of coolant are needed?
And l have my answer thank you guys very much. This wasn't about active cooling of a motor casing it was about the mentality of the rocketry collective. I have been out of the hobby a very long time and now I'm retired and wanted to get back in. My first thought was to join a club but l don't like...well basically the arrogance I've encountered here. I wanted to know if I'd have a good time working and most of all learning from people who have been in the hobby a long time. Again you answered that. And I'm grateful l found out now. I'll get back in and just build and fly on my own like l use to. I'll build some crazy crap and I'll bury a few and RUD a few but that's ok. It will be fun and l won't be around a bunch of people like this. Ya'll have a great day and don't take yourself to seriously.
I am surprised that folks did not come to the obvious answer. Liquid cooling of rocket nozzles is standard practice for liquid motors. I quick look at the amount of heat transfer involved shows how hard a problem it is [and why pretty much nobody attempts it on a hobby rocket]. David Crisali's graduate project is a fine example of an amateur effort. There should be something in Rocket Propulsion Elements or Liquid Propellant Rocket Engines (sp) on the principles. A survey of AIAA papers will probably turn up some things, as most things have been tried in the early years.
Who has done the hard work? Richard Nakka has I think the most extensive documentation that I have found so far regarding the magnitude of the problem.
I think we all sometimes make the mistake of answering the question we think it should be, rather than answering the question that was asked. If we are proud of discouraging someone, is that really in our best interest?
br/
Tony
I am surprised that folks did not come to the obvious answer. Liquid cooling of rocket nozzles is standard practice for liquid motors. I quick look at the amount of heat transfer involved shows how hard a problem it is [and why pretty much nobody attempts it on a hobby rocket]. David Crisali's graduate project is a fine example of an amateur effort. There should be something in Rocket Propulsion Elements or Liquid Propellant Rocket Engines (sp) on the principles. A survey of AIAA papers will probably turn up some things, as most things have been tried in the early years.
Who has done the hard work? Richard Nakka has I think the most extensive documentation that I have found so far regarding the magnitude of the problem.
I think we all sometimes make the mistake of answering the question we think it should be, rather than answering the question that was asked. If we are proud of discouraging someone, is that really in our best interest?
br/
Tony
We're not obligated to help someone just because they kick in the TRF door and demand answers.
We're not required to help kids who want to make sugar motors just because they hold themselves hostage and tell us they'll do it without our help
Vendors aren't obligated to comply with customer's unreasonable demands.
I'll help, but you gotta ask without being rude.
Could you imagine driving a couple hours to spend a day next to nutty? Life is just too short.
I've taken the time to read back over the OP and associated posts by the author in this thread. I went back reading over my responses as well.
I found my responses short and to the point, and they could be read as being abrasive as I didn't bother with any pleasantries just got to the point. I've a background in science and engineering so I answered pretty much as I would to any other researcher. I don't consider feelings very much when discussing facts and methods. I tend not to have a lot of extra time available to add fluff. I apologize if this came off wrong. It's harder to read people and responses on the web than in person.
But on the flip side, I do a LOT of free engineering for many projects, as well as actually working for a living. I took time off to answer the OP question under the assumption that it was a real question. Since the OP mentioned "hard work" I assumed the person had done at least some research on the subject of the post, but had perhaps missed all the important parts. That happens sometimes. Google, for instance, isn't what it used to be. Also some don't have the background to approach rocket science problems so sometimes the responses provide alternaitve areas to research and learn.
I do consider my time as having some value. I do not appreciated wasting it on what was apparently essentially a childish stunt.
An unknown person who posts on this forum with technical questions should understand that we can only get an understanding of the person based on the impression the person makes in the posts.
We get people coming in from third world countries who just want to make a weapon. We get people coming in trying to trick us into saying something quotable. We get people coming in who are pyro nutjobs. We get people coming in who want to play, regardless of consequences.
Rocketry is inherently dangerous. Make a mistake and people can die. Those with experience will bend over backwards to help those who need it and will profit from it. You deal with us straight, we'll deal with you straight.
As a field, Rocketry doesn't suffer fools gladly. Neither do I.
Gerald
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