Yarrow Fewless

Principal at CPP Wind Engineering.
Excited by rockets and racecars, science and engineering, arts and music.
Opinions my own.

[Solar and Storage Industry @SEIA]

Solar is critical to meeting America's growing energy demand.

No energy source is faster to deploy, has more projects in development, or added more capacity last year.

[Yarrow Fewless @YarrowFewless]

@SpaceX This is one of the most impressive things I have ever seen. What an accomplishment!

[Yarrow Fewless @YarrowFewless]

Fine, 13/64". Now no one is happy. 🤣

[Scott Manley @DJSnM]

Americans complain when I use units they don’t understand, I translate to those units and instead they complain that it’s a fraction they don’t understand. 🤣🤣🤣🤣

[Yarrow Fewless @YarrowFewless]

@SpaceX Who's this little guy

[CPP Wind Engineering @CPPWind]

"We at CPP are thrilled to announce our new partnership with Tuckerman Capital. This strategic investment marks a significant milestone in CPP's journey, opening doors to unparalleled growth opportunities and innovation..."
-Oliver Napp, CPP Wind CEO
https://t.co/fAxCkva5ni

[Yarrow Fewless @YarrowFewless]

@WTMesonet Like pulling in the stagnant hot air as the cool air moved out.

[Yarrow Fewless @YarrowFewless]

@WTMesonet Looks more like heat recovery. You can see the temperature was dropping before the increase. What was the air temp at 7:30? The downburst could also have had a lull pocket that got heated by the ground and then pulled over the met station as the downburst translated.

[Yarrow Fewless @YarrowFewless]

@fredhaanjr What volume of the journal was it in?

[CPP Wind Engineering @CPPWind]

Are you heading to Munich June 14-16 for Intersolar Europe? Join CPP Wind's Heather Sauder, Fahad Akon, and Brendan Bagiotti to discuss the latest solar industry developments and trends.
https://t.co/Ukgk8CkLof
#intersolar #solarpanels #utilityscalesolar #solartrackers

[Yarrow Fewless @YarrowFewless]

Imagine spending a week on the moon https://t.co/Ft043aFRki

[Yarrow Fewless @YarrowFewless]

@elonmusk Yakko's Razor?

[Yarrow Fewless @YarrowFewless]

A really great description of plume erosion mitigation and acoustic pressures reflected back at the rocket in relation to the incredible @spacex Starship-Super Heavy test launch a couple days ago.

[Phil Metzger @DrPhiltill]

We used steel plates for some of the Morpheus launch locations so we weren’t tied down to places with concrete. I analyzed the heating of the sheet and showed that the heat would redistribute fast enough that it would not locally melt on the surface, and… /1

[Yarrow Fewless @YarrowFewless]

This really was an excellent achievement. I really appreciate how SpaceX approaches development with the attitude that testing and sometimes failing is better than trying to never fail at all. And the cheers from the team on the livestream tell you how much they accomplished.

[SpaceX @SpaceX]

Liftoff of Starship!

[Yarrow Fewless @YarrowFewless]

@considercosmos Wow! Just really stunning videography.

[Yarrow Fewless @YarrowFewless]

@WrightDobbs @SciGuySpace My understanding is that their criterion is based on a measured peak gust at 60 ft which was the reference from wind tunnel testing that accounted for the mean and gust profiles, so the only value needed to know loads is the gust speed at the ref height.

[Yarrow Fewless @YarrowFewless]

@WrightDobbs @SciGuySpace This height conversion is from a power law assumption in the atmospheric boundary layer used in the national wind loading standard ASCE 7, and NASA handbook 1001.

[Yarrow Fewless @YarrowFewless]

@WrightDobbs @SciGuySpace You can directly compare the measured peak to the gust limit, but only after correcting for height. 87 kts gust at 459 ft is about 70 kts at 60 ft (NASA ref height). That's below the criterion.

[Yarrow Fewless @YarrowFewless]

@SciGuySpace The peak-to-sustained (1-min ave) speed is about as expected, so you can compare the measured peak to the gust limit, but only after correcting for height. 87 kts gust at 459 ft is about 70 kts at 60 ft (NASA ref height).

[Yarrow Fewless @YarrowFewless]

@SciGuySpace Wind speed in a hurricane increases with height, so if the KSC anemometers are at 230 ft and the NASA criterion is at 60 feet. The correction is roughly 0.85 to correct down to 60 ft. That would mean it was at the criterion. DM me if you want more info, @SciGuySpace

[Reed Timmer, PhD @ReedTimmerUSA]

If anyone in Fort Myers Beach comes across a Surginator station that was mounted to the gate on the pier, please let us know! It looked like this but #2. This station collected atmospheric data and backs up the surge data collected by the sensor head. @ChasinSpin @ChrisFLTornado