Search found 13837 matches

by neptronix
Sep 20 2021 5:46pm
Forum: Forum Rules and Features
Topic: Move to XenForo software
Replies: 103
Views: 3604

Re: Move to XenForo software

So i had to write a poor man's profiler to get to the bottom of this. GD ( for writing jpegs to BMPs ) and exiftool were using a majority of the cpu time... both unlikely suspects! imagetender performance problem 2.png I found that GD's imagebmp ( writes a bmp file ) takes 20x more time to using ima...
by neptronix
Sep 20 2021 12:34pm
Forum: Forum Rules and Features
Topic: Moving servers today
Replies: 27
Views: 575

Re: Moving servers today

I'm not convinced that such per post limits are effective... it is easy to circumvent by just posting another reply to a thread with additional images. It can be annoying if someone wanted to post a new complete build thread of their project rather than a thread added to over days or weeks. They're...
by neptronix
Sep 18 2021 11:43am
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 165
Views: 2316

Re: Ivermectin/Covid info

Nice. Very smart on the NHS for looking into new/repurposed treatments more than any of their peers. In the phase III clinical trial of ronapreve aka regeneron, they said it reduced the hospital stay from 3 weeks to 1 week. Now imagine if you can roll that out across the world and then no longer hav...
by neptronix
Sep 17 2021 8:06pm
Forum: EBike Non-hub Motor Drives
Topic: Rewind a cyclone 3kw motor for more power ?
Replies: 41
Views: 734

Re: Rewind a cyclone 3kw motor for more power ?

Obviously, there is a practical limit to that, but: Just it is said, by rewinding the motor to 2x speed you can *nearly* get same torque at same heat loss (amps times phase resistance)... but than you have a motor with 2x top speed allowing you to slap on 2x mechanical gear reduction, that DOUBLES ...
by neptronix
Sep 17 2021 7:54pm
Forum: Forum Rules and Features
Topic: Moving servers today
Replies: 27
Views: 575

Re: Moving servers today

They all get forced into being below 2048 x 1500 size. So you can upload whatever the hell you want!
Idea stolen from facebook. :)
by neptronix
Sep 17 2021 4:10pm
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 69
Views: 1962

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

Regen can be awesome if you have a strong pack. Used to use hobbyking lipos, with a 5C charge rate. No problem dumping 1000W into them. Eliminated my rear mechanical brake because it wasn't necessary anymore :lol: great breaking!! Of course you want to tune this for an appropriate level per your bms...
by neptronix
Sep 17 2021 3:07pm
Forum: Forum Rules and Features
Topic: Move to XenForo software
Replies: 103
Views: 3604

Re: Move to XenForo software

Fark. The testing is only halfway done. WTF :roll:
It turns out using exiftool to detect jpeg rotation puts a >3x penalty on the speed of the process. :evil:
Process completion time is more like a week, instead of 29 hours. :shock:

Time to optimize further.
by neptronix
Sep 17 2021 1:50pm
Forum: Forum Rules and Features
Topic: Moving servers today
Replies: 27
Views: 575

Re: Moving servers today

That's why systems like phpbb and xenforo are designed to put limits in at the stage of uploading. Which can be inconvenient to the user. That's why i put ~100 hours into writing a platform agnostic, after-the-fact image processor just for our form. But if a picture is 1000 words then 36 pictures is...
by neptronix
Sep 17 2021 10:57am
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 165
Views: 2316

Re: Ivermectin/Covid info

Yah.. that spray works topically so it will do some useful things in only certain areas..
I've actually tried the product for sinus issues and it fell on it's face for me. Not even an improvement over a neti pot.
by neptronix
Sep 16 2021 2:01pm
Forum: General Discussion
Topic: The keto thread
Replies: 128
Views: 17632

Re: The keto thread

You know, i stopped going out for food a while ago and only occasionally slip on that. Keto food at restaurants is either overpriced or rare to find anyway. The only reason to visit a restaurant it's because it's cheat day. :) At my office i have a fridge full of meat and veg and a bunch of drinks a...
by neptronix
Sep 16 2021 1:43pm
Forum: Forum Rules and Features
Topic: Moving servers today
Replies: 27
Views: 575

Re: Moving servers today

I understand why you think AWS is a huge pain in the ass. I got thrown into the role of being a AWS server administrator in 2014, and had to learn how to work AWS the hard way. The learning curve is mondo. But.. knowing how to twiddle these knobs, some setups i'm responsible for *are* cheaper on AWS...
by neptronix
Sep 15 2021 8:35pm
Forum: EBike General Discussion
Topic: How difficult is it to integrate a GMAC (rear) or Grin All Axle Hub motor (front) into a factory 250W Mid drive bike?
Replies: 16
Views: 318

Re: How difficult is it to integrate a GMAC (rear) or Grin All Axle Hub motor (front) into a factory 250W Mid drive bike

Consider that both of these motors will add some continuous drag. So you'll want there to be a good reason to have that extra power. You'll probably also need a much more powerful battery to supply both.. two controllers.. and two throttles also. For me? i wouldn't really do it because the power wou...
by neptronix
Sep 15 2021 8:30pm
Forum: EBike Build Threads
Topic: LWB recumbent for long trips.
Replies: 33
Views: 1333

Re: LWB recumbent for long trips.

By chance do you think the seat bars took the hit for you when you crashed?

..i was thinking some bars protruding outwards could really take the hit for you. You're in an optimal situation with your build to mess with such things.
by neptronix
Sep 15 2021 8:27pm
Forum: Alternative Energy
Topic: evaporative air cooling, made better than HVAC
Replies: 19
Views: 408

Re: evaporative air cooling, made better than HVAC

Yup. Mini splits with reversible heat pumps are the most badass thing i've heard of, and i'm surprised they're not everywhere. What would be really cool is a combination evaporative and AC system that worked in different ratios depending on inside conditions. Could keep humidity and temperature cons...
by neptronix
Sep 15 2021 5:14pm
Forum: Alternative Energy
Topic: evaporative air cooling, made better than HVAC
Replies: 19
Views: 408

Re: evaporative air cooling, made better than HVAC

Oh god standalone units are garbage and such electricity hogs. I put together a webpage for an Italian air conditioner company selling these mini split units with amazing EERs and got the idea that Europe isn't as stupid as us, but you just popped that bubble, lol. I see missed opportunities all ove...
by neptronix
Sep 15 2021 5:10pm
Forum: EBike General Discussion
Topic: Latest project - transcon bike
Replies: 31
Views: 610

Re: Latest project - transcon bike

Oh yeah it takes a while to get used to them. Good handlebar placement on CLWB bikes is critical and can make the difference between feeling like you're about to fall off and carving canyons confidently at low and high speeds. I put pretty wide handle bars on my CLWB bikes, and that alone improved t...
by neptronix
Sep 15 2021 4:33pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2020
Views: 263308

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

speed, high torque starting with a heavy load going up a hill? Or is it more related to the voltage / rpm curve? That's a good question, this figure is at a 0% grade in normal conditions. Once you get into different kinds of loads, the peak efficiency point can swing wildly. 1000W pulling up a grad...
by neptronix
Sep 15 2021 1:15pm
Forum: EBike General Discussion
Topic: Latest project - transcon bike
Replies: 31
Views: 610

Re: Latest project - transcon bike

Greenspeed trike ... Linear recumbent ... Longbikes Slipstream. These are all rather low sitting recumbents. I have semi recumbents here: BikeE, medium size Cannondale easy racer/bent, large Maxarya Ray 2, large ..the maxaraya has the tallest sitting position of all of them. On each one, if i roll ...
by neptronix
Sep 15 2021 1:01pm
Forum: EBike General Discussion
Topic: Latest project - transcon bike
Replies: 31
Views: 610

Re: Latest project - transcon bike

The Toecutter wrote:
Sep 14 2021 10:38pm
How much does your current solar trailer weigh?

I imagine an evolution of this design might look like Paul Elkins' coroplast mobile bicycle camper:

I frocking love this guy, as well as the youtube channel. Tip of the hat, sir.
by neptronix
Sep 15 2021 12:30pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2020
Views: 263308

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Yeah and those factors will swing pretty much everything.
I'm talking about the most common use case.. 26 inch wheel, upright bike, average weight.

Look at the trend in most motor's dyno graphs.. peak efficiency happens between 60-80% of the rated continuous wattage.
by neptronix
Sep 15 2021 11:14am
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2020
Views: 263308

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Just received a new 1500W model set up for 25mph top speed (don’t need to go much faster on the cycle lanes near me). It’s nicely laced into a wide Mavic rim and appears to be very straight and true to my eye. The controller is a new model 18 FET with HY3208 FETs and caps rated to 80V. Darn, for 25...
by neptronix
Sep 15 2021 11:06am
Forum: EBike Non-hub Motor Drives
Topic: Rewind a cyclone 3kw motor for more power ?
Replies: 41
Views: 734

Re: Rewind a cyclone 3kw motor for more power ?

Yet there are plenty of motors that run on super low voltages which are some of the most efficient in the world. Take an astro motor for example.. ultra low pole count.. sky high kV.. taps out at ~40 volts.. eats current for breakfast.. still the most efficient motor you could fit on a bike, a decad...
by neptronix
Sep 15 2021 10:36am
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 165
Views: 2316

Re: Ivermectin/Covid info

Another note in general.. it is almost always better to get your vitamins from food in their unprocessed form. As you know, i'm a hardcore believer in the ketogenic diet and have been on it for 8 years. I would eat a 100% meat diet if it supplied all the vitamins i needed. A nutritional analysis of ...
by neptronix
Sep 15 2021 10:11am
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 165
Views: 2316

Re: Ivermectin/Covid info

Yeah swanson vitamins first earned my business when some GC/MS tests on avocado-soybean unsaponifiables ( a regulated pharmaceutical drug in a few countries ) showed that their product was within a few % of being pharmaceutical grade, and the other brands tested were total garbage. I have been their...
by neptronix
Sep 14 2021 7:10pm
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 165
Views: 2316

Re: Ivermectin/Covid info

I used to take vitamins until I moved back to Texas and found out that 50% of the vitamins sold here do not have what is on the label. You can easily find the real stuff from swansonvitamins ( cheap, good vetted products ) and amazon ( cheap, but many questionable products ). Make sure you get the ...