Hacker News: jondumbau

New comment by jondumbau in "Victoria follows South Australia and imposes electric car road tax"

jondumbau — Sun, 22 Nov 2020 02:39:44 +0000

Many motorcycles didn't come with cats in the 2000s, combined with lots of high strung 600s running massive valve overlap.

But the modern class of commuter bike has got to be pretty good. Drag coefficient is poor but they're also a much smaller area, and city driving is more forgiving for aero.

New comment by jondumbau in "No More Free Work from Marak: Pay Me or Fork This"

jondumbau — Mon, 09 Nov 2020 08:18:42 +0000

Be interested to know which part of it is fake news eh.

The culmination of the recent tweets and actions presents this as having more of a personal tone than a grand indictment of big companies relationship with open source.

New comment by jondumbau in "Tesla has applied for a patent for a new electromagnetic windshield-wiper system"

jondumbau — Sun, 15 Sep 2019 12:10:52 +0000

Cheers, alternators are essentially magic to me. Id have presumed they were generating 'enough' power at all times the engine was running.

New comment by jondumbau in "Tesla has applied for a patent for a new electromagnetic windshield-wiper system"

jondumbau — Sun, 15 Sep 2019 11:54:24 +0000

I'm not much for electronics. Can you explain how playing the stereo affects mileage?

New comment by jondumbau in "Software made me loathe my car"

jondumbau — Fri, 30 Aug 2019 03:10:52 +0000

i used to agree, but i've found a 3.5mm aux cord can fall out quite easily over bumps as the phone gets old. otherwise completely agree.

New comment by jondumbau in "Uber, losing billions, freezes engineering hires"

jondumbau — Sun, 11 Aug 2019 03:31:08 +0000

Uber eats doesn't even operate in outer suburbs, Menulog/eatnow does

New comment by jondumbau in "Hacker Finds He Can Remotely Kill Car Engines After Breaking into GPS Tracking"

jondumbau — Sun, 28 Apr 2019 04:47:20 +0000

What do you mean? Brakes must be mechanically connected, I believe it's the law here.

New comment by jondumbau in "Vendors must start adding physical on/off switches to devices that can spy on us"

jondumbau — Sun, 21 Apr 2019 11:03:50 +0000

Can anyone else comment or corroborate this? I don't disbelieve you but it's a gigantic if substantiated and would definitely get me to leave the platform.

New comment by jondumbau in "Magnet link generator"

jondumbau — Sun, 24 Feb 2019 02:23:55 +0000

The DHT performs poorly for unpopular hashes, cold starts and with poorly configured networking. Particularly the last point, an open udp port is required for best results.

New comment by jondumbau in "Magnet link generator"

jondumbau — Sun, 24 Feb 2019 02:22:08 +0000

No. You need to match all the metadata in the info part of the torrent file, the final hash is a hash of that info dictionary. The fields you lack are largely name and piece size, but without the original file you cannot create the hash of each correctly sized piece. If you have the constituent file (not just it's sha1) you could eventually get it by trying common piece sizes and knowing its name.

*Edit, I overlooked somethkng.

New comment by jondumbau in "Tesla Model 3 Owners Vent About Polar Vortex Affecting Cars"

jondumbau — Wed, 06 Feb 2019 03:44:44 +0000

i think its worth noting that at least the summary presented on this page could be sliced into two sections

1: different usage of accessories to make the occupants comfortable, e.g. warming up interior for longer, running heated seats... 2: physical changes that affect the overall car: denser air resistance, higher rolling resistance..

the one point that is specific to an ICE engine is friction from running colder oils, the rest seem to apply to both ICE, hybrid and electric vehicles, the latter two more so.

overall the takeaway seems to be that most losses in an ICE vehicles are not about the powertrain, whereas a hybrid/electric vehicle has almost all the losses of an ICE vehicle but with significantly more battery degradation.

New comment by jondumbau in "Tesla Model 3 Owners Vent About Polar Vortex Affecting Cars"

jondumbau — Wed, 06 Feb 2019 03:30:58 +0000

i think you'll find that the M3 name is already occupied.

New comment by jondumbau in "World's first fully electric bus fleet quietens Chinese megacity"

jondumbau — Mon, 17 Dec 2018 08:27:28 +0000

30% is the efficiency of the energy in fuel being turned into work.

You need to consider the efficiency of the power generation, power lines, battery and then the electric motor. Any other comparison is misleading.

New comment by jondumbau in "Madrid bans polluting vehicles from city centre"

jondumbau — Mon, 03 Dec 2018 01:14:01 +0000

are they actually the noisiest? don't all vehicles have to be measured under the same dB threshold?

New comment by jondumbau in "Violence Escalates as France Scrambles to Respond to ‘Yellow Vest’ Protesters"

jondumbau — Mon, 03 Dec 2018 00:53:31 +0000

how popular do you really think it is in the average population...

New comment by jondumbau in "World of Warcraft: one simple line of code can cost you dearly (2016)"

jondumbau — Thu, 01 Nov 2018 05:28:45 +0000

there was the funny magic string that would make half a channels modems disconnect too.

New comment by jondumbau in "SQL as an API language"

jondumbau — Fri, 05 Oct 2018 09:15:08 +0000

How did the data get there.

New comment by jondumbau in "Fully digital valves open up engine possibilities"

jondumbau — Mon, 13 Aug 2018 03:55:30 +0000

that really makes the most sense. at that point i imagine it would be a more finely controlled compression release. i shouldn't read too much into the wording of what is essentially a marketing statement i suppose :)

New comment by jondumbau in "Fully digital valves open up engine possibilities"

jondumbau — Mon, 13 Aug 2018 03:54:37 +0000

agree. but you can barely get a 2 stroke passed the existing emission laws, and they're not generally in use in motor racing outside of enduro. ¯\(°_o)/¯

New comment by jondumbau in "Fully digital valves open up engine possibilities"

jondumbau — Mon, 13 Aug 2018 00:17:45 +0000

Nitpicky, but compression release for easy (easier..) starting is already a thing. It talks about completely opening the valves so the starter only overcomes friction. Presumably they're talking about having the cylinders that aren't yet fired spinning over freely? Otherwise it's a very efficient way to spin and engine that can't possibly start without "compressing gasses".