amberwolf said:
YT changed something in their scripting, and the pages no longer let me post comments.
Can someone else post this up there for me?
It is unfortunate that you've prevented anyone from hearing how loud it might be, with your orchestral score.
If you can provide specific test numbers for Wh/mile (or Wh/km) as well as at what speeds and slopes those are given, and for what range, without any pedalling and over multiple passes in both directions on the same stretch of path or road in a short period of time (to eliminate wind as much as possible from the results), they would be helpful in determining if your claims are true or not.
It is also unlikely that you could actually "fly your bicycle" as claimed in the video, as that propeller is far too small to give you speed needed for flight, even if you had lifting surfaces to accomplish that. So at least one claim of the video is definitely not true.
I couldn't get that whole comment in as it was more characters than allowed, the person in charge of the channel also seemed to be very opposed to any critical comments (which is very unfortunate), and so I tried to make it nice in hopes that they would respond to it.
"I have been building fan systems for the back of my bike for 4-5 years for fun, and I am happy to see a company produce a comercial ready product.
It would be nice to hear how loud the bike in operation would be. We only get a small part of the operational sound when it is starting up, but there is no sound of the bike in operation.
It would also help If you could provide specific Wh/km test numbers and note which specific ebike model you comparing it to. I look forward to more videos. Thanks"
You can see it working in the video on flat ground, and it is clear that it gives a boost of speed at least when not on a hill, but it is annoying that they would have made fantastical claims without data and claimed that they got "silence" at higher speeds.
From my last version of the fan attachment for my bike that I made, I found that there was definitely noise in the operation. However, my last version used dual 16" fans with S-shaped blades, and these were enormously less noisy than the 4 smaller ducted fans that I had first used.
I also found that I got a very noticeable boost of speed on flat grounds, a small noticeable boost of speed on small hills, and a very small boost/negligible boost of speed on larger hills. My last model used two 12V 16" 1000 CFM fans, and the next version that I was thinking about making would use four 12V 16" 3600 CFM fans. That would be about 7 times the amount of power as my last version if I decide to go with a 12V version.
It would probably be better to go with a 36V or 48V motor, but that would end up being more expensive, and this is just for fun anyways.
The Aerobicle is probably more efficient than my designs, but it would be nice to have data to back it up.
I am happy to see that there is a company that is making fan attachments for bicycles, but I am disappointed that they have made such fantastical claims without data to back it up.