Recent content by 12notes

If you design to use Grade 5 bolts, then yes. I think some people are confusing ERW tubing with electrical conduit. While conduit is a type of ERW tubing, so is DOM. DOM is a step in the process of making "seamless" tubing. Pretty much all commonly available tubing is Electric Resistance...

Buildandfly.shop is a Russian site that has stolen every single design on there except the ones that are public domain, and those are only not stolen accidentally. They have no affiliation with the actual designers or rightful plans holders, and is just a front for thieves. Do not buy anything...

When I got my glider rating, my instructor gave me a package of one of them so I would have the manufacturer and part number of the external catheter with the least adhesive (I can post it if anyone wants to know). I find the seats in the glider too uncomfortable to fly more than 3 hours, so...

Mike Arnold's AR-5 videos contain a good instructional example of hot wire cutting of a wing core. It's probably worth it to watch all of his videos. The AR-5 held the world speed record for planes under 300kg for 18 years, and I think still has the record for lowest drag despite having fixed...

True about the electric propulsion being straightforward. But I disagree that running existing engines at the edge of their capability counts the same as designing for a completely new propulsion system, or that most of the configuration changes would count similar to a clean sheet design...

I think their approach matches the adage "Either design a new propulsion system, or an airframe, but not both if you ever want to finish" often heard on this board. It makes sense to use the Cassutt or another proven race plane at this time, starting with a clean sheet design would likely add...

The rights to the Davis plans were recently bought and are available again at: https://davisda2.com/

Paypal was never his company, his company was X.com which meged with Confinity, who, at the time had a service called Paypal. He was named CEO of the new company in April of 2000, but was ousted in October. The company renamed itself Paypal in 2001, and sold to eBay in 2002. He made money from...

5+ consecutive years of their eminent demise being constantly predicted while the opposite continues to happen might have something to do with it.

Up 750% in a year, up 250% the last 6 months, and up 16% this year so far, 12% up in the last week...not sure what you're getting at.

In the video, the second number underneath the call sign is the altitude in hundreds of feet. First call to Seattle center is at 12,900 feet.

They have pressure sensors in the pitot and static. They have gyros to combine with this data to get the angle of attack. Just because you don't like it or understand how it works doesn't make it a "glorified tilt sensor" and certainly not a guess. The FAA certified this method. These are...

The controller was one of the good ones really trying the help the pilot as well. If you ever hear a controller tell you the altimeter setting out of the blue, you probably just blew an altitude restriction and they don't want to have an audio record that can result in action. "You've exceeded...

If you look at the website, you should notice that every unit has pitot and static ports. "Probeless" in this case, means there isn't a dedicated AOA probe, not that they have zero air data at all. If they couple the gyroscope data with the pitot/static data, this can give a good approximation...

As I'm ~1400 hours into my build, my magic number is 1. 1 person, 1 foot off the ground. Once I get to the point where that's possible, then those numbers will increase significantly.