October 15, 20223 yr Author I had the Weather Flight buy an HP-71B. I programmed a number of weather functions and calculations into it and also copied (with permission) a sunrise-sunset moonrise-moonset plus twilight times BASIC program a University of Pennsylvania professor had written. It worked perfectly. My first HP calculator was the HP35. I believe it was the first one. I was working for Air Research at the time and they offer the engineers and technicians the calculator at half price to be paid for over three pay periods from your paycheck. I think we all took advantage of that. About a week after we got them a notice went up on the bulletin board to all technicians. Keep your calculations down to 2 places. The engineers don't need 6 or 7 place numbers to work from. Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
October 16, 20223 yr Jack, I too still have a slide rule. My Dad taught me how to use one, when I was just a pup. Sue Edited October 16, 20223 yr by Penzoil3
October 16, 20223 yr I had a modern TI-89 (from almost 20 years ago), but didn't survive well all the beating at college. Now I have it as an emulator in both my phone and tablet, but it's just not the same. Fortunately, the watch I have has a slide ruler on the bezel. Quicker than an actual calculator haha Best regards,Luis Hernández Main rig: self built, AMD Ryzen 7 5700X3D (with SMT off and CO -50 mV), 2x16 GB DDR4-3200 RAM, Nvidia RTX 5060Ti 16GB, 256 GB M.2 SSD (OS+apps) + 2x1 TB SATA III SSD (sims) + 1 TB 7200 rpm HDD (storage), ID-Cooling SE-224-XTS air cooler, Viewsonic VX2458-MHD 1920x1080@120-144 Hz (G-sync compatible), Windows 11. Running P3D v5.4 (with v4.5 scenery objects as an additional library, just in case), FSX-SE, MSFS2020, MSFS2024 and even FS9! Lossless Scaling for all my sims. What a godsend...Mobile rig: ASUS Zenbook UM425QA (AMD Ryzen 7 5800H APU @3.2 GHz and boost disabled, 1 TB M.2 SSD, 16 GB RAM, Windows 11 Pro). Running FS9 there .VKB Gladiator NXT Premium Left + GNX THQ as primary controllers. Xbox Series X|S wireless controller as standby/mobile.
October 16, 20223 yr Author 2 hours ago, Penzoil3 said: Jack, I too still have a slide rule Have you ever used a circular slide rule? They fit into a shirt pocket better than a linear slide rule. I've used both until calculators became available. How about an E6B? It's a circular slide rule of sorts. Just for a different purpose. Noel Edited October 16, 20223 yr by birdguy The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
October 16, 20223 yr Author 57 minutes ago, Luis Hernandez said: Fortunately, the watch I have has a slide ruler on the bezel. The first thing I got rid of when I retired was my wrist watch. Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
October 16, 20223 yr 2 hours ago, Penzoil3 said: Jack, I too still have a slide rule. My Dad taught me how to use one, when I was just a pup. Sue It was a long time ago as I'm 63 now. I remember wanting one because I was a total nerd but also I liked the Apollo NASA engineers always taking one out of their pockets and figuring out equations, I thought it was so cool. Jack Sawyer
October 16, 20223 yr 2 hours ago, birdguy said: Have you ever used a circular slide rule? They fit into a shirt pocket better than a linear slide rule. I've used both until calculators became available. How about an E6B? It's a circular slide rule of sorts. Just for a different purpose. Noel No sir, just the rectangular ones. Didn’t know they had a circular one. Jack Sawyer
October 16, 20223 yr Author 11 minutes ago, Jack_Sawyer said: Didn’t know they had a circular one https://cacm.acm.org/blogs/blog-cacm/253838-how-does-one-calculate-with-a-circular-slide-rule/fulltext Another device I learned to use and became quite proficient adding and subtractng with when I was living in Japan was the soroban or abacus. I never did learn how to multiply and divide with it but my wife at the time could. I could hardly follow her flying fingers when she was using one. https://en.wikipedia.org/wiki/Soroban Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
October 16, 20223 yr 40 minutes ago, Jack_Sawyer said: Didn’t know they had a circular one. They also had a cylindrical one which was considered more accurate because the scale was in a spiral form and was about 66" long: Dugald Walker
October 16, 20223 yr 24 minutes ago, dmwalker said: They also had a cylindrical one which was considered more accurate because the scale was in a spiral form and was about 66" long: That's cool! Jack Sawyer
October 16, 20223 yr 1 hour ago, birdguy said: https://cacm.acm.org/blogs/blog-cacm/253838-how-does-one-calculate-with-a-circular-slide-rule/fulltext Another device I learned to use and became quite proficient adding and subtractng with when I was living in Japan was the soroban or abacus. I never did learn how to multiply and divide with it but my wife at the time could. I could hardly follow her flying fingers when she was using one. https://en.wikipedia.org/wiki/Soroban Noel Very cool stuff. I could never get the hang of an abacus but it’s a brilliant tool. Jack Sawyer
October 16, 20223 yr Moderator Back in the very early sixties, I enjoyed going to the Tehran main bazar and watching the vendors flicking the beads on their abacus. Fr. Bill AOPA Member: 07141481 AARP Member: 3209010556 Avsim Board of Directors | Avsim Forums Moderator
October 16, 20223 yr 2 minutes ago, Bert Pieke said: From my collection.. Wow! Very cool!! Jack Sawyer
Archived
This topic is now archived and is closed to further replies.