Yes it must be 13" for Svseeker size. I'll make a duplicate for myself. I bought metal so I can weld up the bell mold/frame just need to start on it. Maybe next weekend. Thanks for the info. I'll read through it.
Thanks for the link - Very thorough indeed and nice looking bells. Zaps here is a new profile based on HT1's PDF Figure 4. You'll have to scale it to 6.5" wide or 165mm.
The shape is different. Is the new bell a navy variety? I like the look of the first one more but am open to different styles. The second one has a tall bit in the top. I haven't had the chance to delve into the link yet. Hoping on sunday to have some free time.
Yes the Navy Bell - Figure 4 in the linked pdf. Look at the clapper and the mounting mechanism for the Navy bells before you make the first one.
A little late to the party here. I've cast a few bells and here's my advice. First, use real bell metal not silicon bronze. It's easy to alloy and is the best behaved metal I've cast. I used 80% copper and 20% tin by weight. The big difference from si. bronze is bell bronze is very brittle which makes it sustain the tone longer. It can also break if you drop it. Don't ask. Si. bronze is pretty bendable and dampens the sound comparatively. Forget aluminum. Brass is decent and commonly used. Another advantage of bell bronze due to its brittleness is you can put your sprue down the middle inside with a slight narrowing at the end and it will snap off clean after casting. No need to do ridiculous feeds from the outside. Also it resists oxidation better than any yellow metal I've cast. Here's a video that really helped me. Note how they decorate the outside too. Here's my thread on the other site. http://www.alloyavenue.com/vb/showthread.php?13259-Wedding-Bells&highlight=wedding+bells My pattern was a brass ships bell which didn't have the characteristic profile of other bells but seemed to work. I can't remember who or which site it was, but someone once posted that they had several sizes of aluminum bell patterns they were willing to loan out. I tried a lost foam bell once. Total failure. Sweep molding looks interesting and I'd be curious if you come up with something. Best of luck!
Bell bronze? Learned something new today. Interesting. I'm not really sure why he wants to stick a bell on that boat. We had one on a trawler and the constant clanging almost found itself in the atlantic. Perhaps a nice silent inclinometer would be a better idea.
the coast guard says he must have a bell they even say what size it must be ... A deeper toned bell tells you it is a larger ship this is important if you are moving into a fogged in anchorage, Ships signal their front with a bell and their stern with a gong . you hear a loud deep bell, and then A quieter gong, you are nose to Nose with a large ship "FULL ASTERN" https://www.usps.org/national/vsc/conductvsc_files/USCGMinReq_2012.pdf the size info is in the instruction I posted earlier http://everyspec.com/DoD/DoD-SPECS/DOD-B-24673_23252/ there is an actual instruction from the CG that says what tone the bell must be, and I cannot find it but the info is in the above spec V/r HT1
I'm sorry But I disagree, I've made a quite a few bells , personnally and for the USN using http://everyspec.com/DoD/DoD-SPECS/DOD-B-24673_23252/ or it's predecessor( the newer one is metric, the older is Inch and Lbs) I have cast them out of Mil-B-16540 (common 86-8-4 or c90300), 60-40 Yellow Brass, and the extremely odd Si Bronze the U.S. Military Makes all their Bells out of C87200... 24 year Navy Veteran here honest to God USN Molder 88-96. I have seen Navy Bells horribly abused and Have never seen a Modern bell, Post 1960, Broken or cracked. there is a great treatise here specifically on Bell Bronze based around the 80-20 composition , but it makes no comparison to completely different alloys http://www.foundryworld.com/uploadfile/20094132737377.pdf but it clearly references that bell bronze has not been Quantitatively compared. quote Table 2 indicates that the quantitative recommendations of weight percentage of the main elements (as a whole) in tin bronze materials are incomplete and vary in detail for each reference. Incomplete quantitative recommendations contribute to the lack of knowledge about this popular and common bell material. Furthermore, it is also anticipated that large variations in bell material composition may occur in practice because of different bell manufacturers’ knowledge/experience/ preference as reported in the reference [2-11]. Therefore, it is necessary to determine the quality of different bell materials by metallurgical and chemical analyses, including the measurement of mechanical properties (e.g. microhardness) whenever possible due to small size of specimens. There is no doubt a well cast and finished 80-20 bell sounds awesome, but so does C87200 bell! but a c87200 bell is definitely not brittle, shines wonderfully, and is EXTREMELY corrosion resistant. which on a pitching rolling ship on salt water maybe preferable to to a slightly more musically appealing bell Again I'll mention I have not been able to source C87200, and metalurgically it is very different from Silicon Bronze Everdur UNS C87300 which is what most artists and Hobbiest cast with. I have not been able to locate a spec for a Clean 80-20 Bronze, so no comparison can be made. There is a high likely hood and its expressed in the Foundryworld article I linked that very small additions of trace alloys would very much effect the quality of a bell, with Modern alloys bells of Pure 80-20 can easily be produced http://www.janfelczynski.com/en/church-bells/material-quality is making 78-22 bells of the Highest quality , but ask yourself if they cast one of their bells from C87200 would it perform differently??? 60-40 scrap Yellow Brass 10 Lb (scrap) made IAW http://everyspec.com/DoD/DoD-SPECS/DOD-B-24673_23252/ https://www.facebook.com/video.php?v=2060894493930179 V/r HT1
