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Search: Posts Made By: polyphrast
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06-20-20, 01:40 AM
Replies: 124
Views: 8,718
Posted By polyphrast

First, those 6V/3W are specified with a constant...

First, those 6V/3W are specified with a constant 12 Ohm load at 15 km/h (~9 mph), second your forumloader is a lot of things, but not a constant load. To my knowledge there are no measurements...
06-14-20, 01:54 AM
Replies: 32
Views: 1,128
Posted By polyphrast

Lupine uses scotchlok for connection of their...

Lupine uses scotchlok for connection of their e-bike taillight, so it can't be totally unreliable. You might take a look at the coax plugs offered from schmidt/son...
03-23-20, 01:03 PM
Replies: 12
Views: 765
Posted By polyphrast

That is the best way to control the beam shape...

That is the best way to control the beam shape with LEDs. Outbound and Supernova use the same approach, Lezyne does it as well for their StVZO lights, and Lupine as well for their new light. The...
03-23-20, 10:11 AM
Replies: 12
Views: 765
Posted By polyphrast

The numbers i have read repeatedly are...

The numbers i have read repeatedly are 10.000-15.000 euro alone for the development of the optical system. It is also time consuming. Usually a software called lucidshape is used. From what i have...
02-28-20, 01:48 AM
Replies: 124
Views: 8,718
Posted By polyphrast

Reason for this are german regulations which...

Reason for this are german regulations which require nominal output at around 15 km/h (Since Germany is/was one of the biggest markets for dyno hubs, as dynamo based lightning was legally required...
02-24-20, 12:18 PM
Replies: 9
Views: 699
Posted By polyphrast

Being a trained (electro)chemist (albeit more on...

Being a trained (electro)chemist (albeit more on the fuel cell side), i watched one of the YT vids and quickly scanned a publication on that matter. Probably graphene will appear soon in some cells,...
02-19-20, 02:52 PM
Replies: 37
Views: 2,891
Posted By polyphrast

Post Then you live in a different world than i do. Any...

Then you live in a different world than i do. Any conical beam pattern lamp will blind motorists. Of course a motorist will not blind you, because cars and (motor)bikes are forced by law to have...
02-19-20, 12:49 PM
Replies: 37
Views: 2,891
Posted By polyphrast

It is myth (which unfortunately too many cyclists...

It is myth (which unfortunately too many cyclists believe), that lights with a conical beam pattern (i.e. lights without a cut-off) do not blind motorists (or other cyclists or pedestrians). I guess...
01-28-20, 03:41 PM
Replies: 21
Views: 1,866
Posted By polyphrast

Some german bike shops ship those B&M lamps to...

Some german bike shops ship those B&M lamps to the US (~20 EUR Shipping), some don't. E.g., Bike24.com does it, and since VAT doesn't apply to US citizens (but US customs/duty/import taxes do...),...
01-27-20, 11:39 AM
Replies: 21
Views: 1,866
Posted By polyphrast

Thanks for clarification. The term cut-off...

Thanks for clarification. The term cut-off applies imo only to lights with similar patterns as car headlights (or StVZO certified bike lights). Some come close to those regulations, even if not...
01-27-20, 10:30 AM
Replies: 21
Views: 1,866
Posted By polyphrast

When i watch this video...

When i watch this video youtube.com/watch?v=zddgpNQebWw , i severly doubt that this light comes even close to having a cut-off. There is way to much light at the reflective street signs (just watch...
01-20-20, 12:53 PM
Replies: 21
Views: 1,313
Posted By polyphrast

Supernova gives both values for their high-end...

Supernova gives both values for their high-end lights, see e.g. here (https://supernova-lights.com/en/products/e-bike-lights-25kmh/m99-mini-pro-25/). However unless you see the beam pattern against a...
01-17-20, 11:10 AM
Replies: 22
Views: 1,187
Posted By polyphrast

However, those dynamo lights tend to refuse to...

However, those dynamo lights tend to refuse to work with a DC power source. In this case one would need to buy a light specififed as e-bike DC version. Again the Busch und Müller e-bike lights are...
12-30-19, 05:58 PM
Replies: 74
Views: 12,908
Posted By polyphrast

I answer here to a post from a different thread...

I answer here to a post from a different thread since it fits better here:

Thats a bummer with the formatting, here is a description to each images as shown in the translated...
12-30-19, 02:34 AM
Replies: 15
Views: 986
Posted By polyphrast

Which light are you talking of? The B&M Ixon IQ...

Which light are you talking of? The B&M Ixon IQ Premium (the one powered with 4 AA batteries)? the B&M IQ-X (a dynamo light)?

You could use one of the minoura holders or the topeak barxtender and...
11-15-19, 04:37 AM
Replies: 6
Views: 893
Posted By polyphrast

I'll begin with those questions which are shortly...

I'll begin with those questions which are shortly answered:

2) besides the Lupine SL-F it is by far the most effective road light i ever owned and i never want to go back to use anything with less...
11-09-19, 02:35 AM
Replies: 55
Views: 3,504
Posted By polyphrast

StVZO certification can be obtained by non german...

StVZO certification can be obtained by non german manufacturers as well. Roxim as a taiwanese company does it, Hermanns as a company from Finland as well. I think many companies don't do it, because...
09-19-19, 01:36 PM
Replies: 101
Views: 11,233
Posted By polyphrast

Mounted the light today and went for a 20 min...

Mounted the light today and went for a 20 min ride to a park with some dark paths. Nobody needs a high beam when there are streetlights, so in most cases it's more a "want to have it" thing. However...
09-16-19, 10:10 AM
Replies: 101
Views: 11,233
Posted By polyphrast

If you order, order best directly from the guys...

If you order, order best directly from the guys website (http://www.velogical-engineering.com/velogical-ordering---b2c-b2b). The you can save on the VAT tax, which you don't have to pay if shipped...
09-15-19, 01:48 AM
Replies: 7
Views: 1,247
Posted By polyphrast

It seems the test data all came from Andreas...

It seems the test data all came from Andreas Oehler and Olaf Schulz, and i suspect they are from this (german) magazine: fahrradzukunft . de
The respective german article (well you probably...
Showing results 1 to 20 of 20


 
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