Random Engineering, Physics, ..., Concepts and Ideas

2 posts were merged into an existing topic: Slow Chat III

The more reliable power harvesting method for drones is
Vampire Drones (Sorry about the terrible video thumbnail)

South Denmark Uni made a drone which attaches to a power line for an inductive charge when it’s hungry

2 posts were merged into an existing topic: Slow Chat III

Tech Topic - 20190226 - Adam Explains the Effort to Waterproof Electronics on the Makani M600

Tech Topic - 20180618 - Ben Introduces a Variable Pitch Rotor Design for Makani M600

Designing Wing’s Aerodynamic Hook

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Alex Slocum reuploaded his 2.75 FUNdaMENTALs of Design lectures. Course contents, including calculation spreadsheets, are on: FUNdaMentals of Design - MIT MEDICAL DEVICE DESIGN

North Sails 3DL Video

The video is a bit old. Patent is now expired, I don’t really know if other sailmakers are doing the same now US6260497B1 - Sail and method of manufacture - Google Patents

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To make things clearer 3DL in the video is an older North-Sails technology where the sails were laminated. Performances were good, but sails were fragile. Northsails is now using 3Di technology (as in Windy text above) which is “monolithic” and shows better durability and better stiffness/weight.

Here is 3Di patent which has been expired for 2 years apparently. US8506739B2 - Method of producing sails using reinforced, formed fabrics - Google Patents. Patent was not by NorthSails but for exclusive use.
Le 3Di à la loupe dans le nouveau Course Au Large

3DI is now reaching windsurfing, but it seems it has not been used for kitesurfing yet. https://www.youtube.com/watch?v=ii3nveMxV20

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