Paul Breed

Unreasonable Rocket, NetBurner, Pilot , A+P, Embedded dev, KL7JG, machinist, sometimes triathlete.
Fill the Hubble volume with Humans! 10^33 humans or bust!

[Paul Breed @unrocket]

Savery's Pump, Edison's light bulb, Wright's flyer, Ford's assembly line , Teller's gadget, Neil's step, @Spacex landing. HUGE HUGE DEAL!

[Paul Breed @unrocket]

My Dad did two tours in Kodiak as a @USCG pilot in the early 1960's I was born in 1962 on Kodiak.
The stories of the bad weather down Aleutian chain without modern navigation and modern weather reports were down right terrifying. Dad earned an Air medal and number of other serious accolades from his time there.
The USCG academy published a book "Traditions of Gallantry: Graduates of the U.S. coast Guard Academy" this was given to cadets to inspire them. The 2nd edition published in 1998 the copy I have has 42 stories starting with USCG class of 1883 My dad class of 1953, has a story on page 117.

[Paul Breed @unrocket]

@SciGuySpace With enough thrust pigs fly just fine....

[Paul Breed @unrocket]

@SimoneSyed Read Heinlien's bad luck....

[Paul Breed @unrocket]

Sorry guys' the engineer in me has to add some things:
If there is no heat going in to the sheet pointed at deep space the temp is going to be very low....
Add any heat leaking or intentional and the temp is goign to rise. Its not like cold water water is still going to be cold while sucking a lot of heat from something....

In fact you have to items, temperature and heat flow....
The radiative transfer equation says Watts is k*(T1^4-T2^4)

Where K is a constant dependent on a area, view angle boltzman constant. In the above equation T is in absolute degrees.... the t for black background space is 2.7K (pointing at earth its ~255K or -18C)

Since the ratio s are ^4th power the amount of heat you can transfer goes up a lot if you can increase the temperature of the emitter... there are semicondutors that can run at 150C,so it really pays to have temperature tolerant GPUs on a space craft.

A worked example Radiator a 100C (373K) pointing at 2.7K sized for 1KW .
Same exact radiator at 70C can only dissapate 700W.

You natural intuition of hot and cold and heat flow developed in a thermally conductive medium (air/water) is wrong here...

[Paul Breed @unrocket]

Take an aluminum sheet and point it at space on a very clear dark night. The sheet will be cooler than the ambient air. This is radiative cooling...
On earth the sheet will have radiative cooling to space and conductive heat transfer from the air. At some point when the sheet is colder than the air, the radiative cooling is fighting the conductive heating.
So this works better in a vacuum as there is no air fighting the radiative cooling... and the real dark space is cooler than the dark clear sky, because there is warmer air radiating , a properly coated emitter pointing at deep space with no additional heat input will get VERY Cold down close to the 2.7K (-459F ). On a per unit area basis radiative cooling is not as good as air or water flow, but its good enough. This is an easy problem, ie all the issues are known no magic science needed to make it work. Just basic spacecraft thermal engineering, well trodden well known path.

[Paul Breed @unrocket]

@izzerix @kerrinnaude @Devon_Eriksen_ Exactly!

[Paul Breed @unrocket]

@errxn @ElonBachman I defined all my terms in simple English and gave clear explications of the different terms @grok did I use too much Jargon?

[Paul Breed @unrocket]

@Daveisnotbob @sentdefender Ice at -47, had to be SLD being shoved up there from the top of a cell... Ice is really scary... can happen ungodly quick when warm moisture gets shoved up into really cold air.

[Paul Breed @unrocket]

@RedbudHunt @sentdefender

[Paul Breed @unrocket]

@DJSnM @aviationbrk In a different dashcam you can see its missing its horizontal stabilizer. https://t.co/X42uMm5OS0

[OSINTdefender @sentdefender]

Man

[Paul Breed @unrocket]

@GArro01998055 I already have a new shoulder (done in 2017) its perfect

[Paul Breed @unrocket]

Had cochlear implant surgery Tuesday. Went well! In 3 weeks they switch it on and I officially become a cyborg. Hearing is nice and all, but I’m really here for the upgrade path: jet pack, fingertip welding heat ray etc...

[Paul Breed @unrocket]

Hearing aids were no longer working for me. Im fine with low pitch voices in quiet, but high pitch voices in noise or female atc controllers were problematic. Ive known this outcome was in my future, the decision has always been when. Waiting also reduces brain plasticity and results in poorer outcomes. I first looked seriously at this 3 yrs ago and decided it wasnt yet time.

[Paul Breed @unrocket]

@otokyo__ (60+37)-2=95

[Paul Breed @unrocket]

@WesRoth In high school I could reliably shoot 23/25 in trap...
and 40/50 in doubles maybe its time to go dust of those 45yr old skills...

[Paul Breed @unrocket]

AI work thoughts...
I've always had more things to do than I could accomplish. I was always limited by my drudgery tolerance... Today amazing things can get built at a rate that is exhilarating...... I'm working way longer hours because the hours have 100x "accomplished something today satisfaction"... That feeling has always been the real reward.... My wife (and our dog) have been in San Fran visiting our Grand daughter. and as a result I've lost all the normal moderating influences... I worked 40 hours Fri,Sat,Sun and accomplished more than I would in 6Mo in past times and I'm stoked... (As I type this its been 15hrs today)

[Paul Breed @unrocket]

To be fair Dennis you and I are old school senior dev's Ai makes us 1000x more productive. It makes the work Waaaaay more fun. It also nukes the need for Junior devs to do grunt work. It also damages the path we used to get here.
Were going to have senior people, AI and zero new hires.

Eventually all us old devs are going to retire or die....
I fear it will be like the retirement apocalypse when the WWII old school machinists all retired...

[Paul Breed @unrocket]

@atensnut Frys's (origional) then Toys R Us.