ExperiMental Rectangle Trumpet 13 (Obsolete, see the newer one!)

OBSOLETE: See the next one here: https://www.thingiverse.com/thing:7318760 So Swirl, what's new? Haven't heard anything for a few minutes. Well, I had a buddy ask me to make some game pieces for him and print them with my resin printer. My poor resin printer had been sitting in the corner weeping because no one would play with him. Now look, it's all happy again! So while printing those parts, I think to myself, when I think, I often think to myself, I'm not sure how to think to someone else, is that even possible, but I think, the resin printer has better resolution than a filament printer, why not try to 3d print the trumpet with that thing? Well, that would be a lot of resin, and take a lot of time, so why not just the manifold and valves with that thing? Hey, it looks a lot like the previous one! Yeah, so? get over it! Maybe I'll go back to the crazy design again? No no I mean crazier than this! So, first off it doesn't fit within the printers build area. So time for some chopping! Been chopping? No I've been chopping! What's that penguin doing on the 3d printer? oh never mind. Resin printing is slower, so it also requires patients. I never became I doctor because I didn't have any patients! Ba dump bump! So basically, this version of the rectangle trumpet requires two printers! Yes, two! A filament printer and a resin printer. I guess you could print it all with a filament printer but that sort of negates the idea but hey, do what you want! So what's changed? I redid the manifold, separating the three cylinders and trying to tidy them up a bit. I also tried to standardize the size of the inside of the cylinders because they were getting weird with dragons inside. You'll need to glue those together and get the holes lined up so I made an alignment tool for aligning the holes between the cylinders. I didn't try to standardize the valves, since they each are slightly different and shouldn't be but whatevs, this is an experiment, right? I didn't hear any responses! Oh yeah, I'm talking to myself, in my head, and then typing that. Continuing... I updated the mouthpiece again. I tried to make it match the 7C a little more and tried to round the part that touches the lip and the choke venturi point. I'm not sure it's any better, tho. I also detached the entry curve and the exit curve from the manifold so those could be printed on a filament printer and superglued in. I also made hollow versions of the valves with a hole on top and bottom to help the resin escape or else print them solid, I don't care, just seems wasteful! So yeah, print each cylinder, sand the surfaces between cylinders lightly (not really the inside of the cylinder), insert the hole alignment tool, then superglue the cylinders together without gluing the alignment tool in there. ;-P Try not to drip superglu on your wife's nice blue velure kitchen chairs. It makes her mad! Don't ask me how I know. Sand the valves just enough to make them fit with 100 grit then sand with 320 grit to make them somewhat smooth. Don't sand too much! Don't sand too little! But wash off the sand before coming back into the house! You might capture all the micro-plastics, and kill them with fire or they might try to get in your mouth and attack your brain and spleen! Then, glue all of the parts together without gluing your fingers together or eyelids together. How would you glue your eyelids together? I don't know but don't do it! I'm working on 3d printing it and hope to make a video when I get it assembled and tested. Update: Here's a video of me playing the trumpet. I think it sounds better! Of course not perfect but better! The 3d printed mouthpiece seems to be the best 3d printed mouthpiece I've made so far - still not as good as the real thing, tho, but getting closer! https://www.youtube.com/watch?v=56Kqeg2ABko I think this one actually sounds more trumpet-like than any of the previous trumpets. The tuning is still a bit off. The valve slides can be adjusted some but I think that just makes them more flat and they really need to be a little more sharp so they will need to be printed shorter and then allowed to be adjusted. There of course needs to be a tuning slide after the lead pipe but so far there is not one. Also needs to be spit valves, but hey, up until now I've just tried to make it functional! But anyway, this has been a much tougher design challenge to myself than I originally thought. I think the resin manifold and valves sort stick like a joe-block sort of sticks because they are flat against flat. The vaseline sort of works like slow bearings between the two. I tried duralube and also white lithium grease but the vaseline seemed to work the best. Probably graphite (dry lube?) would work but then again you'd have dust flying out of your trumpet and into your lungs so that's probably not a good idea. Anyway, there it is! I hope you like it! Update: I've printed the manifold in ABS. I'll need to reprint the rest of the parts also since on the resin one I superglued them all together. :/ I adjusted the leadpipe to go from 10mm for a while then up to 11mm since chatgpt seems to think that might sound better and fix some of the notes. I'll try that and try to remember to report back. Update: I've tested the trumpet with the manifold in ABS. It seems to do better than the PLA manifold but less as well as the resin manifold. The ABS manifold works without any oil or vaseline. The resin one with vaseline I've found gets sticky after a day or two so I'm not happy about that. I am happy about the ABS manifold not needing oil but it does sound more airy than the resin version with vaseline. I figure it would sound better with vaseline but I don't want to have it get sticky after a day or two. I might try adding some oil with a little more viscosity than the thin oil to see if it moves but seals better. Also, I haven't tried supergluing it all together so gluing it would probably help too. I did print the 10mm to 11mm leadpipe and that seems to be better with some of the notes than the 9mm to 11mm leadpipe so I like it better. I think one other thing that might help would be to resize the whole trumpet larger so that the bore size goes from 11mm to 11.5 or 11.7mm. ChatGPT tells me that's the better size to go with. I guess I'm sort of tired of printing trumpets so not sure when I'll try that. Also, it looks like PETG might be the material to use. Like PLA dampens the sound, ABS, less dampening, and PETG even less dampening. So I guess if I were to try another I might try PETG and scale it all slightly larger. Shrug. Anyway, I'm glad to have gotten this far and I feel it's playable even if it's not perfect and not perfectly in tune but at least it's functional where the first few weren't really functional IMO. I think it sort of looks nice too even if it's not like a regular trumpet, cornet, or pocket trumpet, it still looks trumpet-ish. Probably, it would be nice to add the bells and whistles like spit valves and main tuning slide but so far I haven't played it enough to get enough spit in it to need it. Yeah, it's more of a novelty and to see what could be done rather than practical but I'm glad I can at least play a tune if I'm in the mood. ;-> Update: Here's a video of me playing this trumpet with the ABS manifold: https://www.youtube.com/watch?v=BuUNqljVif8 It doesn't seem to be as good as the resin version but still not bad. It doesn't need oil or vaseline for the valves to move but it could probably work better with some oil on the valves. Also, it's not glued together so that might be adding to the airy-ness of the sound. But yeah, not perfect, but not bad either for something that can just be downloaded and 3d printed! So yeah, yada yada, experimental, try at your own risk, it will probably change, the usual bit. I still need to print it and try it, and whatnot and maybe sleep and wake up and remember what I was doing and then oh yeah now I remember and whatever. Previous Failures: https://www.thingiverse.com/thing:7306298 (12) https://www.thingiverse.com/thing:7297719 (11) https://www.thingiverse.com/thing:7294238 (10) https://www.thingiverse.com/thing:7292657 (9) https://www.thingiverse.com/thing:7288297 (8) https://www.thingiverse.com/thing:7286843 (7) https://www.thingiverse.com/thing:7280312 (6) https://www.thingiverse.com/thing:7248272 (5) https://www.thingiverse.com/thing:7237443 (4) https://www.thingiverse.com/thing:7234659 (3) https://www.thingiverse.com/thing:7218285 (2) https://www.thingiverse.com/thing:7210488 (1)