2024-10-08 (Tu) GrinderCompassMKIII Floating spinner

I printed four buoys larger than the old version to find one that would float. I even experimented with wide versions in case I needed significantly more floatation. By happy coincidence, the first one I tried was close to neutrally buoyant. It was the tallest one that could fit into a test tube. I dried it after the test and sealed a magnet inside with printer resin. The bottom still needed to be a smooth hemisphere, but I plan to revise that later.

I drew colored lines in the vents to visualize the rotation. When I sealed the buoy inside a test tube, I crushed the spinner because the pressure increased significantly as I pushed a plug into the water column. Despite my fumble, I got excellent rotation from the spinner as I moved a magnet nearby. I detected some friction when the test tube was not level, so I may switch to a viscous lubricant soon.

Spinner in water reacting to magnet

GitHub files for GrinderCompass
The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11

Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com

This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by  Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.
2024-09-29