Looks like it arrived in one piece - which is a bonus considering how far it travelled.
1/96 Project 1710 Beluga
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DavidWho is John Galt?Comment
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Your establish how much water is displaced by the upper portions of the hull. That's done by weighing that portion (estimate, as you have to discount the below waterline portions in this case). The weight has to be corrected as to the density of the material; its specific gravity (the standard here is the weight of one ounce of fresh water). You simply multiply the materials specific gravity (usually a bit over one or slightly less than one) by the dry weight -- like you see on that scale. Corrected for material density you have the weight of water the above waterline portions of the hull displaces -- and that's the weight of water your boat needs to take on to get the boat to that magic 'neutral' buoyant condition. That last shot is checking the weight of water this particular SD contains within its ballast tank. Came out to nearly five-ounces. This will work for Scott's little BALUGA.
Sometimes fortune shines.
DavidWho is John Galt?Comment
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grtz,
Bart
Practical wisdom is only to be learned in the school of experience.
"Samuel Smiles"Comment
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DavidWho is John Galt?Comment
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It's a 2.5" diameter cylinder. Is it for Scott's little BALUGA? If so I can put one together quick and get it off to you. If it's for another boat I need to know the maximum length of cylinder I can get into that boat and how many ounces of water the ballast tank has to hold. I'll take it from there. I assume you need a single-shaft version?
David
Yes it's for Scott's lovely BELUGA....no way around....I have to squeeze her assembly in.
grtz,
Bart
Practical wisdom is only to be learned in the school of experience.
"Samuel Smiles"Comment
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After some thinking (gasp!) I switched the BALUGA cylinder from a 2.5 to a 2-inch diameter unit. It gives me the length to produce a ballast tank of nearly twice the capacity needed to get this model up to designed waterline. And the smaller diameter presents little of the ballast tank above designed waterline, so not much wasted buoyancy with the smaller diameter system. I've already cut cylinders and have sized the bulkhead for three units. One for Scott, one for Bart, and one for me.
DavidLast edited by He Who Shall Not Be Named; 05-11-2018, 11:57 PM.Who is John Galt?Comment
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The Three Musketeers? Wait a minute; I don't think there was much thinking going on with those guys. The Three Amigos? Nah, Bart will think that an amigo is some kind of tropical fruit. I have it; the Three Grumpy (Old) Farts. Bart can join now and add the "Old" when he gets his quals finished.Comment
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The Three Musketeers? Wait a minute; I don't think there was much thinking going on with those guys. The Three Amigos? Nah, Bart will think that an amigo is some kind of tropical fruit. I have it; the Three Grumpy (Old) Farts. Bart can join now and add the "Old" when he gets his quals finished.
DavidWho is John Galt?Comment
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The Three Musketeers? Wait a minute; I don't think there was much thinking going on with those guys. The Three Amigos? Nah, Bart will think that an amigo is some kind of tropical fruit. I have it; the Three Grumpy (Old) Farts. Bart can join now and add the "Old" when he gets his quals finished.
Grtz
UglyPractical wisdom is only to be learned in the school of experience.
"Samuel Smiles"Comment
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I'm working up the little SD's for you, me and Bart. While doing that I had a brain stroke ... er .... brain storm: replace the low pressure blower (LPB) electronic switch with a mechanical one working off the ballast sub-system servo? Cheaper, easier, and frees up a receiver output port.
As you can see, the same limit-switch support is applicable to the entire range of SD sizes:
DavidWho is John Galt?Comment
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