Building an EV more efficient than walking

All things related to vehicles - EVs, transport, fuels
chris_n
Posts: 137
Joined: Sun Jun 26, 2022 9:33 am

Re: Building an EV more efficient than walking

#21

Post by chris_n »

Putting silicone on a bike tyre is a recipe for disaster. I have a friend who did that to blacken his tyres when he wanted to smarten his up when I got a new bike. First run out he had a flat front tyre, the base of the valve had pulled out. Next time out the same thing happened again. The tyre had moved on the rim and pulled the tube with it. It was just as well we weren't coming down one of our fast mountain roads or he wouldn't have got away without a big crash!
Living the dream in Austria.
Uk property 3.75kW PV linked to 3kW inverter.
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Saladin
Posts: 27
Joined: Sun Jul 07, 2024 5:27 pm

Re: Building an EV more efficient than walking

#22

Post by Saladin »

What's that Chris?

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I had a run in with a car. It wasn't the silicon.
Here's a great video all about it.



I was travelling behind a car in town after a trip over two local hill ranges to do some grocery shopping. The car in front was turning left at a junction and I observed a car at the junction turning right, I also observed hadn't seen me and were getting ready to pull out in front of me. I was already on the brakes but as soon as the oncoming car moved I realised I had to drastically stop and minimise liability, I threw the bike into a wheels first slide using the frame as an e-brake.

I got away lightly. Only 20 stitches in the jaw, a mild concussion, fractured nose, swollen cheekbone, black eye, fat lip, bruised inner leg, two bruised knuckles and minor road rash on my left elbow. I was wearing a T-shirt, shorts and a climbing lid.

The bike was equally fortunate. The electronic display is cracked with 5% of the non-essential pixels expired in the upper left corner, missing front mudguard stays and one taco-d wheel.

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I ascertained I slid the bike under the car wheel which is what stopped me.

On the way into the ambulance I heard the driver victim blaming me for signalling left and also claimed I had hit the A-pillar on a dent that had been coincidentally sanded down to bare metal in a rectangle ready for bodyfiller and paint.

I don't especially care for societal norms. I got the bike back and repaired it, I won't be chasing compensation. As far as I'm concerned regardless of the character and observational skills of the motorist it's my fault for allowing it to happen. I had right of way so the ball is in my court to walk away.
The expired wheel was end of life anyway. 4 of the spokes were detensioned because it was so far from true. I took the opportunity to replace the pair for stronger. My rear is D-shaped being a hardtail and hitting pot-holes loaded and at speed.

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The latin translates as "Life without Wisdom"



To address two concerns of yours Chris; You can clean off the Silicon Grease with brake cleaner or any solvent and a rag. You'll find a pot of the potion beside every tyre mounting machine in every auto tyre fitters.

The reason for it is to sit the bead uniformly on the rim thus creating a round wheel. All tyres have a round indexing mark beside the mounting flange if mounted correctly this will be equi-distant from the lip of the rim edge.
On the Schwalbe Road tyres this happens to be a smanchy photo-reflective band.

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Another feature is metal valve stems. These are resistance to chaff, shear and penetration. They don't really cost extra compared to rubberised stems and have a locknut for retention.
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Saladin
Posts: 27
Joined: Sun Jul 07, 2024 5:27 pm

Re: Building an EV more efficient than walking

#23

Post by Saladin »

Chain Wear


Back to routine maintenence...

450 kms on my daily it's time for a new chain. Replacing a Decathlon rebranded KMC E-11. The own brand KMCs seem to be even better; 0.25% tighter tolerances outtov the box.

It's best to keep an eye on chain "stretch" and replace the chain every 0.75% wear on the outside. I use two chain checkers because one validates thuther.

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Yurp...she's done. Some people advise replacement at 0.5% wear for 10 -12 speed chains. Meh...go ahead if you want..
Elongated chains first destroy your cassette then your chain ring...ignore it too long and you'll be buying a new drivetrain. If the rollers aren't engaging uniformly on the teeth of the sprockets they'll deform them and then the chain starts skipping instead of pulling. Steel cassettes are cheaper and more resilient to this.

Sometimes a worn chain won't skip because it's already deformed the cassette to it's conformity but as soon as you replace it the new chain will skip because the sprockets (usually the high gears first) have been compromised by the old chain.

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Mid-drives + gravel tracks + wet riding have a high wear rate on chains. Some lubricants are better than others. The Halfrauds stuff I pictured earlier isn't great. It's also made of liquid PFAS (teflon) which is horrendous for the environment...I'm in the market for better, more eco, substitute potions.

Next up to bat:
Shimano E8000 most expensive chain I've ever bought.

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Freshly soaked overnight in degreaser to remove the factory grease that dirt loves to stick to. It's not a lubricant it's an anti-oxide. Before installation strip the grease off and lubricate it.

WTF...

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100% worn outtov the box!!!! :o
Do not buy chains on that "jungle rainforest" site. This is the last in a long series of fakes I'm after getting. The QC is so bad it's more likely you'll get a counterfeit than anything else.

Bin!

New KMC E-11...tested 0.25% wear outtov the box.
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Saladin
Posts: 27
Joined: Sun Jul 07, 2024 5:27 pm

Re: Building an EV more efficient than walking

#24

Post by Saladin »

Wifey and kiddo returned home after holidays.

I moved the cargo bike into the living room and I'm just about getting away with it because it's clean and a family vehicle and all other things considered.

Haven't made much progress. Just roughing in the final placement of things but we'll get into the specifics when I mount them for final installation as I do. The motor has departed Asia.

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Front and rear dyno-hub lights came with the bike.

The handlebar forward facing and tail lights are user and/or light sensing off the system battery with thumb controls and a discrete photosensor in the display.

Front & rear indicators are button actuated. Brake light is going to be sensed off a reed switch on the front brake and the yellar manual motor-cutout switch {electronic clutch}.

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The horn speaker is integrated into the main battery powered forward facing lamp.


Rear Lights et al

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The suspension seat rocks..actually and figuratively, souper comfy and responsive..the suspension seatpost is in the ether coming from Holland, I'm using a rigid as a temp.

Stereo batteries. I'll add more later for extended range but 2kWh is the base model.

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Last edited by Saladin on Sun Jul 14, 2024 2:20 pm, edited 1 time in total.
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Saladin
Posts: 27
Joined: Sun Jul 07, 2024 5:27 pm

Re: Building an EV more efficient than walking

#25

Post by Saladin »

Why not just buy a prebuilt?

If I did that I'd get a
650Wh super expensive proprietary battery without an expansion facility,
A non-programmable, non-serviceable restricted motor with 70Nm of torque,
An aluminium cassette with not much in the way of increased gear range.

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for ~€8050 ex. works

Instead I bought a used muscle bike base vehicle for €2k
Added €450 of battery and already had a sister partner from the fleet because they're universally compatible
+€700 of motor kit,
+€100 of drivetrain and the rest could be argued are add-ons anyway.
- A 2x10 Shimano Deore Groupset leftover going on Fleabay complete with cranks and bottom bracket.

Giving me a comparable
Fully programmable motor and modular accessory kit that's serviceable with readily available and inexpensive parts. 160Nm of torque.
A rugged drivetrain.
anna 2kWh expandable fuel tank.

Time? Labour? ...time's a concept {it's a reference standard for rate of spin from the perspective of Terra Firma...that is all! If you confuse it with experience, entropy, education, efficiency, productivity, causality, cell reproduction, wisdom or the ability to heal you'll severly curtail your growth potential}.
Labour's a birthright.
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