I wanted to post some materials and things from high powered rocketry that might be used in loudspeaker construction and design. Thought maybe we could get some cross-mojonation going here.
Nose cones. These come in many sizes and shapes. They go from 1/2” to 7 1/2” even larger if you have the $. Most are pointy ogive or round parabolic. The pointy ones could be used for tweeter and midrange enclosures, or used on the backs of woofer magnets. Some could be used for diffraction/phase cones on full ranges. They are made from all kinds of materials, most are polystyrene plastic, but there are nosecones made from balsa, maple, hard urethane, fiberglass, and carbon fiber.
Tubes. Airframe tubes make the airframe of a rocket and are also found in many sizes and materials. They can be used for vents, t-lines, enclosures, or even stands and feet. The most common material is cardboard but they are made in hard phenolic paper, fiberglass, and super sexy carbon fiber. the high power tubes are what you want. They are thicker and much stronger than the Estes tubes. I’ve used LOC 54mm (2”) tubes for vents. These tubes are made to very precise diameters and have bulkheads and rings that you can add to create enclosures. Many of the sizes fit directly into tubes of larger diameter, for example four 1” tubes fit in a 2” tube, four 2” tubes fit in a 4” tube. Maybe doing this could make a non turbulent vent? The cardboard tubes can be fiberglassed to create a much stiffer tube. They can be veneered. The fiberglass and carbon fiber tubes are much stronger, way lighter, and a lot more expensive than PVC pipe. The tubes can be cut lengthwise and used on the cabinet edges to decrease diffraction effects.
Nose cones. These come in many sizes and shapes. They go from 1/2” to 7 1/2” even larger if you have the $. Most are pointy ogive or round parabolic. The pointy ones could be used for tweeter and midrange enclosures, or used on the backs of woofer magnets. Some could be used for diffraction/phase cones on full ranges. They are made from all kinds of materials, most are polystyrene plastic, but there are nosecones made from balsa, maple, hard urethane, fiberglass, and carbon fiber.
Tubes. Airframe tubes make the airframe of a rocket and are also found in many sizes and materials. They can be used for vents, t-lines, enclosures, or even stands and feet. The most common material is cardboard but they are made in hard phenolic paper, fiberglass, and super sexy carbon fiber. the high power tubes are what you want. They are thicker and much stronger than the Estes tubes. I’ve used LOC 54mm (2”) tubes for vents. These tubes are made to very precise diameters and have bulkheads and rings that you can add to create enclosures. Many of the sizes fit directly into tubes of larger diameter, for example four 1” tubes fit in a 2” tube, four 2” tubes fit in a 4” tube. Maybe doing this could make a non turbulent vent? The cardboard tubes can be fiberglassed to create a much stiffer tube. They can be veneered. The fiberglass and carbon fiber tubes are much stronger, way lighter, and a lot more expensive than PVC pipe. The tubes can be cut lengthwise and used on the cabinet edges to decrease diffraction effects.
And I've always tried to teach newcomers that loudspeaker design is not rocket science..... 😳 😎
But very nice. 👍
Kind regards
Michael
But very nice. 👍
Kind regards
Michael
A million years ago, the first subwoofers from Hsu Research had cylindrical enclosures that were basically Sonotube from a hardware store. They were fantastic performers for their day and I always wondered why that physical format did not make it longer in the market. This is still an elegant subwoofer enclosure.
Let's not forget overlap in electronics too! Dual redundant flight computers with automatic hot swap and not one not two but three HD cameras looking in various directions. Daughter for scale (we built it together).
Let's not forget overlap in electronics too! Dual redundant flight computers with automatic hot swap and not one not two but three HD cameras looking in various directions. Daughter for scale (we built it together).
About a bazillion Bazooka brand subwoofers for car audio were made with that approach also. They were pretty impressive for their size/price back in the day.
The idea of using multiple tubes inside one another is something that an audio engineer showed to me about a year ago. Maybe some of the tubes were different lengths, I don't remember, but it was enough already to wrap my head around.
A) None of you forum bastards can afford her 😉
B) It does not end well but here you go ('Kate" the female flight computer is onboard & live linked to the PA system)
B) It does not end well but here you go ('Kate" the female flight computer is onboard & live linked to the PA system)
I'm afraid that I have never needed a fever or meds to mishear/misread/misunderstand. Though challenging, life often sounds or reads hilarious.
Yup, lost a fin on the uphill. This bird had flown happily maybe ten times on N motors but the first O found the speed limit of my epoxy.
...And this is MEDIUM compared to some of the folks in the hobby. There's been many amazing projects that push the definition of hobby aerospace real, real hard.
...And this is MEDIUM compared to some of the folks in the hobby. There's been many amazing projects that push the definition of hobby aerospace real, real hard.
Wow! Never thought I'd see rocketry in this forum! Brings back great memories...
I've used the same postage tubes for rocket body tubes and ports in my speakers. They are 90mm ID and available readily Australia wide (AusPost). Very cheap and readily adhere to wooden boxes with standard PVA.
I've used the same postage tubes for rocket body tubes and ports in my speakers. They are 90mm ID and available readily Australia wide (AusPost). Very cheap and readily adhere to wooden boxes with standard PVA.