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Just think of navigating on the open ocean and making maps for others to use in the 1500's just the equipment list below .Global and maps not shown How you feel traveling ocean with just this equipment ? . All this we can build in our shop with the engine for ship too...

Gyro compass and magnetic compass onboard sounds like aircraft. Glad to here they a sextant. I can see why calculators are noon. I guess it was taking noon for your location on the sea. Any photos? How does the steering propeller work? Dave I did use Calculus for my work. TO many...

CVN has has 65,000 hp per screw. War ship always have lot more hours power . The cargo ships are built for fuel economy. I do not know why on a cargo they only have one screw. I wonder on a cargo ship if have Sextant for Navigation. The sextant is a safety equipment if some happens to...

I was to see supper size with screw. I am say all but I seen just one Dave

I agree 99% never use Calculus after college I use Math up to Calculus a lot when working doing engineering. But I think in reality only about 99% never use Calculus after college. Most just wast of time. I have ask license Engineers that question and all said same thing only used...

I wish I knew Would satellite get virus? If ship navigation equipment got virus some one could a cellphone. I know one the Navy had a few tube radios just case transistor was burn up after a nuke when off. I wish I had save to article from October. I could follow the links and find out...

Simple way of finding Longitude Use sun dial to find the time where at only by sun Use global with time disk on the top set to disk to watch/clock (note best Greenwich) . Now find the time off sundial on dial. Now you have Longitude See photo on the disk on top global. Greenwich is zero...

Just think of sailing in 1492 use a Astrolabe Latitude only. With dead reckoning using a rope and hourglas/sandglass. Longitude was in the 1700's with better time keeping

I agree The big thing was teaching high school was how to use chart and tables for wood construction. At time when High school and college i did iron work and welding. I could see how all work . It also helped my father did engineering on metal buildings too. We also tried the transit on...

The biggest between the Sextant and transit is the Sextant uses the ocean for leavel and transit need on stable ground. The sextant also has filters for viewing the sun. A good Transit is great viewing the stars it low power (mind is only 32X) but adjust easily. I do not think in today books...

I whish that was in article on if everything broke down. It is like some maybe super cargo ships having a engine and prop. What can go wrong . The bridge just jump out and hit the ship. The last information I had the US Navy uses 2 or 4 engines/props They can steer the Ship with out a rudder...

( I could never hold steady enough for stars ) I think problem with most of us will have. They Navy most hàve some reson for teaching navigation on Sextant. After looking all different types it could a fun project to build too. The Astrolabe. It is Very old use on ocean simple to use...

This off subject of engines. Asking about Navy is teaching Celestial Navigation to new officers. The Navy start this about 10 year ago with training new officers but making the news this year. I was read whole article but could not find it. I hopping some one else read the article or better...

Welcome to the group Dave

If you planning doing a lot casting A low cost fuel #4 or #6 fuel oil. Some foundries use this on east coast. I forgot the price I know after shipping 200 miles it 1/2 cost of propane. At I using 500 gallons of propane a week . The only drawback for some is you need 10,000 gallon tank and buy...

Kerosene is also use for jet fuel and if very cold in diesel engines call #1 fuel oil. Dave

Try melt iron is Hard and steel is worst. What found was propane is ok and Coke or Charcoal is better. If i was going to melt steel I would look at 3 phase carbon arc. Induction is best of all but a lot harder to build and find drawings / schematic Dave

Nice painting Looks smog free for day Thank you Dave

Nice looking chart. When start poring aluminum is use chart like thig for temperature to save money. I did not workout. Now very good Westen Temperature gauge. Dave

Welcome to the group Dave