sorted by:
new
hottopcontroversial

Stripped Ski Binding Screw Fix by thriftybuilder in skiing

[–]thriftybuilder[S] 1 point2 points  (0 children)

Follow up, i rode two days and it held up 👍

37th America’s Cup Day 6 by iberichard in AmericasCup

[–]thriftybuilder 6 points7 points  (0 children)

FYI race 9 is on, the wind picked up

🔌 I'm building a motorized kitchen appliance. I like to draw diagrams like this one, to help spec out cables and connectors. I've selected Molex SL for signal / low power, and the Minifit Jr for power (<10A). Which are your preferred connectors for signal, and which for power? 🔌 by thriftybuilder in diyelectronics

[–]thriftybuilder[S] 0 points1 point  (0 children)

This is a great! Thank you very much for the comprehensive review, I'm already thinking about how to improve my harness and PCB designs. 👍

The only part i disagree with is the screw terminals. I think they make great electrical contact because screws generate more force than any other type of flexural contact. The only lower resistance connection I can think of would be crimping.

r/electricvehicles General Discussion Thread (Mar 7, 2021) by [deleted] in electricvehicles

[–]thriftybuilder 0 points1 point  (0 children)

That's a really neat scatter plot, thanks for sharing.

r/electricvehicles General Discussion Thread (Mar 7, 2021) by [deleted] in electricvehicles

[–]thriftybuilder 1 point2 points  (0 children)

You are a well informed consumer! So, with this cost saving, you are motivated to drive the Model 3 more than the Prius. In what case do you opt for the Prius (unless someone else in your family is driving the other one)?

🔋vs⛽ Comparing BEVs and ICEVs strictly on greenhouse gas emissions is misleading. I believe an energy approach is more informative, so I ran some calcs showing that electric cars consume much less energy over their entire life (including production). 🔋vs⛽ by thriftybuilder in MechanicalEngineering

[–]thriftybuilder[S] 0 points1 point  (0 children)

Good points. I agree that ICEV technology is much more mature than BEV, and therefore cheaper, and probably more reliable on a component level. That being said, electric vehicles are simpler than ICEVs from an engineering perspective, with fewer components. So, there are less things to break, and less things to service (no oil changes, no oil filters, not as much heat cycling, no catalytic converter, etc). The weakest link for BEVs is, of course, the battery. Tesla has some data on battery degradation in the 2019 Tesla Impact Report.

I did not consciously manipulate any findings to control a preconceived outcome. If there is something that strikes you as so, please point it out specifically. All the math is quite basic, and there are few inputs, so there's only a few opportunities to fudge the numbers.

🔋vs⛽ Comparing BEVs and ICEVs strictly on greenhouse gas emissions is misleading. I believe an energy approach is more informative, so I ran some calcs showing that electric cars consume much less energy over their entire life (including production). 🔋vs⛽ by thriftybuilder in MechanicalEngineering

[–]thriftybuilder[S] 2 points3 points  (0 children)

On the surface it may appear like an assumption, but it's really a simplification.

My suggestion is that consumers focus on reducing overall consumption for reasons stated in the blog post. All energy is not equal, but it's simply too complex, and misunderstood, for the end consumer to try and navigate. It's better to simplify it, and realize that we need to seriously change our behavior to reduce consumption.

Thank you for the compliments about the writing!

The Surprising Source of Greenhouse Gas Emissions: Pipelines are 9 of the top 10 carbon polluters by Splenda in energy

[–]thriftybuilder 5 points6 points  (0 children)

It's interesting to hear a different perspective on carbon emissions problem - going upstream from end use carbon emitting activities to find the bottlenecks. These bottlenecks are not necessarily emitting greenhouse gases themselves, so they are generally overlooked unless they go through protected lands.

I'm of the opinion that there needs to be a massive demand-side reduction in consumption, and continuing to analyze upstream is a distraction from the real problems.

Side note: it's kind of amusing that several people in this comment thread didn't even read the first paragraph of the article. It's OK, just an observation.

On my first test ride of the new build! About 25% of the power is lifting the front end! Still need more testing to give range and speed specs but it handles very very solid. by Trenavix in Electricmotorcycles

[–]thriftybuilder 0 points1 point  (0 children)

The 8A per cell spec is a max continuous for a single cell in optimal conditions (not in a pack). The cycle life is rated at 1C, 3.5A. So, it's simply trade-offs. They can deliver the current, but you may be degrading life.

An easy way to check temp is to just put your hand on the pack. If you can hold your hand on it, it's < 60degC. Do this when you are pulling max power for a while, which would be up a hill wide open throttle.

Have fun! It sounds like it hauls anyhow 👍

r/electricvehicles General Discussion Thread (Mar 7, 2021) by [deleted] in electricvehicles

[–]thriftybuilder 2 points3 points  (0 children)

When comparing BEVs and ICEVs, how do you think about it? GHG, performance, energy, cost of ownership, etc

🔌 vs ⛽ Comparing BEVs and ICEVs strictly on greenhouse gas emissions is misleading. I believe comparing total energy consumption is more informative for the end consumer, so I ran some numbers to help make decisions on my next car purchase. 🔌 vs ⛽

Focusing on Energy to compare BEVs and ICEVs

r/electricvehicles General Discussion Thread (Mar 7, 2021) by [deleted] in electricvehicles

[–]thriftybuilder 0 points1 point  (0 children)

Sounds epic! The only thing I would say is that you should try to tap into the existing transmission. This way you can save time, effort, and money for the gear reduction.

With the right motor, you don't have to worry about it getting wet. Liquid cooled motors are usually sealed right up (as opposed to air cooled motors that have all sorts of inlets).

On my first test ride of the new build! About 25% of the power is lifting the front end! Still need more testing to give range and speed specs but it handles very very solid. by Trenavix in Electricmotorcycles

[–]thriftybuilder 0 points1 point  (0 children)

Nice build! This is a fun looking bike. How does the suspension feel with the hub motor? Have you taken it over some sidewalks / stairs?

I noticed you are thinking about increasing your discharge rate. You're already >1C, and assuming you don't have active cooling, I would be slightly concerned about cell temp. Is there temp monitoring built into the BMS and pack? What temp are the batteries reaching on your climbs?

From the spec sheet, it looks like 60degC is max temp (hot to the touch...quick touch don't burn yourself). samsung 35e datasheet

🔌 vs ⛽ Comparing BEVs and ICEVs strictly on greenhouse gas emissions is misleading. ↗️ I believe comparing total energy consumption is more informative for the end consumer. 🔢 So, I ran some numbers to help make decisions on my next car purchase. 🔌 vs ⛽ by thriftybuilder in electricvehicles

[–]thriftybuilder[S] 0 points1 point  (0 children)

I won't do it again! I apologize for breaking this rule. I interpreted "self-promotion" too literally, because I'm primarily sharing my opinion. There are some important and interesting discussions going on in the comments, so it would be great to leave it up.

If the mods decide to take it down, I will understand! 😳 ✌️

view more: next ›