Recent content by 4πr^2

Maybe 'inherently' - but it seems like 'real world', turning is most often associated with a braking/deceleration event. Certainly so in most any sort of 'panic event' as in 'hit the brakes and swerve'. In all those deceleration/turning cases, the 'delta' throws the resultant force vector out...

+1000! A good solder joint + hot melt adhesive lined heat shrink will be better than the wire it is in.

Well, I'll leave it to others to lend insight on the motors - that is a bit out of my realm. Though overall, I would say focusing on aerodynamics could yield the biggest benefit if you are running 35mph. As an example - if you are looking at 92% efficient motors or drivetrain, a lot of...

In general, 'wide gauge', (gauge > 56-1/2") is fairly common - especially on old, disused / out of service tracks. 'tight gauge' (gauge < 56") is fairly uncommon as most all wear, train forces, etc, tend to push the rails apart...

What is 'switched off'? How are you measuring? and what are you measuring with? If 'switched off' means an electronic / mosfet switch and you are measuring with the battery out of the bike or disconnected (completely unloaded, or in an open circuit) and you are using a digital volt meter, then...

lol - that is certainly one way! But, I didn't mean to imply 'dealing with the thief directly'. That will almost always lead to a no-win situation... for you. Honestly, even if you watch somebody carry something away, put it in their truck and start to drive away, the moment you step in and...

I certainly wish you better luck than I / my company have had. We put in security cameras due to copper / air conditioner theft and general vandalism. Get great footage of people in hoodies, bandanas and ski masks walking around. On the rare chance we get an identifiable person, the cops...

It is strange that 1 of 9 levels would stop working. As mentioned above - would be good to consider if anything has changed during the rides. I'd be curious - did the first couple of rides discharge the battery and maybe now if 'feels' like #1 is no longer working? Possibly charge back to...

I get your point and it seems well thought out. Certainly many competing design goals when working with something custom. You mention 175mm² copper plates. Given copper resistivity around 1.7x10-6 ohm-cm, that is going to be orders of magnitude less resistance than other components in the...

Great to see the project coming along, can't wait to see it rolling around. Since you asked, my .02 on the battery... as mentioned, it sure would be nice if the box followed a bit more of an organic flow. Possibly could be done with add-ons like the chin scoop you mention. It would be more...

Looks like possibly some python error(?). I have Cura 5.6 working on a Windows 11 box. Though I had python 3.12 installed for other purposes.

Interesting simulation. They seem to attribute additional drag area of almost 1 square foot just to pedaling? Maybe they are assuming different riding positions when pedaling vs not?

Dang - sorry to hear you got scammed, but sounds like paypal is making it right. Looks like those sell for about $149 in a 'reputable' market such as ebay (lol). https://www.ebay.com/itm/155848143161 Those are pretty big, obviously for adult sized bike. But given the kid-sized bikes you...

Get her a bike with training wheels and sneak out every week or so and raise them up an eighth inch. In a few months she will be 2-wheeling and not even know it.

Sounds like these ideal diodes are less than ideal! I'm not specifically sure where that term comes in...I don't see it in the ad. Typically 'ideal diode' is a theoretical 'perfect' diode with no voltage drop. But I don't think that exists real world. So there is going to be some natural...