That looks fantastic!!!
That looks fantastic!!!
Chuck , how did you reinforce the inside of the nose cone ? Did I miss the post?
I do plan on bringing some tools and supplies to the launch to work on the final items.
Chuck, please try to get as much as is humanly possible done before going to the launch site. It is much more comfortable working in your nice barn, with necessary tools and materials at hand, than scrounging for stuff at the launch site. Makes for a more social launch with less stress. It also allows time there for unanticipated SNAFUs (unknown unknowns ), which are more abundant on the bigger projects. YMMV.
Have chased almost every hurricane for the past 20+ years. It's a long story not going to bore you lol.
Was within 2 miles of the eye of Michael last year in Panama City, FL. My first Cat 5 with gusts to 185mph.
Before flying I was a hurricane forecaster and I guess it's still in my blood. Parking lot garages are where I make my stand. Above the storm surge and the stairwells offer bulletproof protection. Afterwards I help those trapped and in need.
That being said Hurricane Dorian has my attention. My initial gut is we may see a Cat 5 on this one. There's nothing in the way of synoptics to stop this thing. It's too early to call but for me to get on here and post means the internal radar isn't liking what I'm seeing.
If it goes major I'll be heading from Houston into the gauntlet. Will need to leave LDRS Friday afternoon, drop off the rocket in Houston, reload the truck and head to Florida.
Ready for the usual wise-cracks and naysayers lol. But have never had a problem and don't anticipate any this time. It's one heck of an adventure if you know what you're doing.
Prepare early in Florida. Within a day or so there won't be any supplies.
Thanks guys.
Chuck C.
Raise a glass to the Cajun Navy! [I know you're a bit west and inland to be Cajun, but you get the drift. ]
And thank you for the gut feel level warning.
. Am going to need several fellow rocketeers to help with the loading onto the rail. If you’re passing by and have time please don’t hesitate to stop by and say hello. Many of you have had some outstanding inputs into this project and it’s appreciated.
Chuck C.
It would be like a thrust ring to keep the fin can in place Richard"Helps transfer thrust from thrust plate to fin can."
Wow, this really is a "kitchen sink" rocket....toss everything in you can think of regardless if it makes sense.
For a 10-second burn? Heat transfer from something around the motor to the fins? What heat?
Sounds like you added mass to the ass for no good reason.
Any SCIENCE behind this????
"Helps transfer thrust from thrust plate to fin can."
Wow, this really is a "kitchen sink" rocket....toss everything in you can think of regardless if it makes sense.
For a 10-second burn? Heat transfer from something around the motor to the fins? What heat?
Sounds like you added mass to the ass for no good reason.
Any SCIENCE behind this????
"Helps transfer thrust from thrust plate to fin can."
Wow, this really is a "kitchen sink" rocket....toss everything in you can think of regardless if it makes sense.
For a 10-second burn? Heat transfer from something around the motor to the fins? What heat?
Sounds like you added mass to the ass for no good reason.
Any SCIENCE behind this????
Genuinely curious: who mentioned anything about heat transfer?"Helps transfer thrust from thrust plate to fin can."
Wow, this really is a "kitchen sink" rocket....toss everything in you can think of regardless if it makes sense.
For a 10-second burn? Heat transfer from something around the motor to the fins? What heat?
Sounds like you added mass to the ass for no good reason.
Any SCIENCE behind this????
Long ago in this thread I happily donated NACA 4197TN flutter analysis alongside Dave optimizing fin geometry. I also as a mechanical engineer graduate donated compressible gas dynamics analysis of shockwaves total temperatures across the shocks at nosecone and fin leading edges.Genuinely curious: who mentioned anything about heat transfer?
"Helps transfer thrust from thrust plate to fin can."
Wow, this really is a "kitchen sink" rocket....toss everything in you can think of regardless if it makes sense.
For a 10-second burn? Heat transfer from something around the motor to the fins? What heat?
Sounds like you added mass to the ass for no good reason.
Any SCIENCE behind this????
Long ago in this thread I happily donated NACA 4197TN flutter analysis alongside Dave optimizing fin geometry. I also as a mechanical engineer graduate donated compressible gas dynamics analysis of shockwaves total temperatures across the shocks at nosecone and fin leading edges.
In essence heat will transfer from the chemical reaction of burning propellant to motor casing to body tube of rocket to fincan by conductive heat transfer. You can apply a thermal analysis from insulated multiple layer pipes if you want with the various materials having different thermal conductivity coefficients.
There is also convective heat transfer from air friction to the surface of the rocket, aero heating, which frankly I was more concerned about than others on this forum. All I can say is I donated some compressible flow analysis to the best of my abilities. This is more complex than pipe heat transfer problems. It applies a NASA math theory based on temperatures across shockwaves while supersonic good enough for actual hypersonic spacecraft design earth re-entry at Mach 25. Finding the maximum total temperature is as simple as a few lines of algebra and a core conceptual grasp of compressible flow from college level courses on advanced fluid dynamics as supersonic flow is not behavioral as lower Mach turbulent or laminar flow.
In college level mechanical engineering heat transfer classes they teach how to find heat transfer rates at points in structures for example slender rods or beams or walls. However a rocket nosecone is of complex geometry and there are no known algebraic methods of analysis that I know of at my skill level as a new mechanical engineer without throwing a thermal analysis software package at it which I sadly lack at the moment to say find a time when the rocket heats to predicted total temperature and where within the structure specifically.
I design conveyors professionally now. Fred maybe overlooking other factors such as stability margin, center of gravity, and center of pressure shifts may have lead the designer to put more mass in the ass end of rocket. Maybe they are trying to structurally accomplish a certain safety factor with thrust loads and internal force reactions on the inside of airframe at joints? Maybe the builder and team lacked analysis in certain areas of the project and desired to stiffen up areas of doubt.
For a “Kitchen Sink Rocket” insult. He can kindly F*** Off and next time Chuck builds a bigger S class rocket after learning from this one, maybe Fred should offer better advice earlier in an “Open Source Forum” project. There was one other engineer by name of Bob who had better advice of thermal analysis through his techniques buried somewhere in thread. Sadly I don’t think he contributed any kind of numerical thermal analysis. What is the point of this rambling??? Sarcastic people piss me off. I hope Fred is kidding around asking what heat? I mean it’s not going to stay at room temperature while at Mach 2. Fred you are way late to the party. Not my first supersonic rocket project either.
Anyways Neil I hope I answered your question.
Hi Fred pulling into the Rocket Pasture.
Come take a look!
Chuck C.
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