hywind portable wind turbine

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peelywally

Active Member
http://www.treehugge...ni_windpowe.php

can clip onto your handlebars and create power on a still day or use it through the night as you sleep in your tent ,

has to be be worth a look for cycle touring as it can charge mobiles cameras etc .

anyone used one got more info ?

ebay have them for £30 .

ive used a wind up charger and tbh the monotony is annoying this might be the answer to mobile charging unlike solar chargers its not dependent on the sun (charge at night on bike or as you sleep if theres a wind ),

not even dependent on the wind because of course you generate wind as you cycle .
 

gb155

Fan Boy No More.
Location
Manchester-Ish
http://www.treehugge...ni_windpowe.php

can clip onto your handlebars and create power on a still day or use it through the night as you sleep in your tent ,

has to be be worth a look for cycle touring as it can charge mobiles cameras etc .

anyone used one got more info ?

ebay have them for £30 .

ive used a wind up charger and tbh the monotony is annoying this might be the answer to mobile charging unlike solar chargers its not dependent on the sun (charge at night on bike or as you sleep if theres a wind ),

not even dependent on the wind because of course you generate wind as you cycle .


Would it not cause drag ?
 
Total crap. Do the physics...

+1. Wind turbines are IMO mostly a con. I did the calculations on installing a 3kW rated wind turbine at home. The average power it would have delivered worked out at under 100W.

Of course if you are using it on the bike it will add drag because its your legs that are powering it. And looking at the spec it has about one tenth the power output needed to charge an iPhone and will take twenty hours of pedalling to charge its internal battery and that optimistically accepting the manufacturers claims with 40mph wind speeds. Remembering that the power output of a wind turbine goes as the cube of the wind speed, cycling at 20mph will give one eighth of that and at 10mph, one sixty fourth.
 

CycleTourer

Veteran
Location
Bury St. Edmunds
The Hymini may output a charging current, but if you read the small print it isn't enough to charge a phone or it's internal battery from flat. We have had two of these, which we used on two separate 4-week tours in Iceland. The first one didn't really charge anything very well so we sent it back and they replaced it. Unfortunately the second one again didn't charge anything with any success and that was with 4 -5hrs of cycling a day well above the 9mph they recommend. Don't waste your money.
 

stephenjubb

Über Member
had one, was totally useless for charging anything takes too long.

the only thing that really works are hub dynamos
 

slowmotion

Quite dreadful
Location
lost somewhere
Now here's a thought, probably wrong, but I'll put it to the jury.

You are pedalling into the wind. My guess is that what slows you down is the partial vacuum that forms behind your bum as the airstream closes up behind you. Now consider putting this little "GreenWash" piece of shite on your bars. It extracts minute amounts of energy from the airstream ahead of your body (making you feel really quite smug) , and in so doing reduces the wind velocity. Conservation of energy and all that A level stuff. This reduces the drag behind your bum.

If I buy twenty of them and create a "Sustainable" array on my bars, will I become Greg Lemond?
 
Now here's a thought, probably wrong, but I'll put it to the jury.

You are pedalling into the wind. My guess is that what slows you down is the partial vacuum that forms behind your bum as the airstream closes up behind you. Now consider putting this little "GreenWash" piece of shite on your bars. It extracts minute amounts of energy from the airstream ahead of your body (making you feel really quite smug) , and in so doing reduces the wind velocity. Conservation of energy and all that A level stuff. This reduces the drag behind your bum.

If I buy twenty of them and create a "Sustainable" array on my bars, will I become Greg Lemond?

Doesn't work I'm afraid. Any slowing down of the air stream by the turbine will result of a force pushing the bike backwards so anything you gain from lower wind velocity on you body you would lose from the wind turbine slowing the bike. Otherwise Formula 1 cars would have a big propeller mounted on the front to make them go faster.
 

slowmotion

Quite dreadful
Location
lost somewhere
Doesn't work I'm afraid. Any slowing down of the air stream by the turbine will result of a force pushing the bike backwards so anything you gain from lower wind velocity on you body you would lose from the wind turbine slowing the bike. Otherwise Formula 1 cars would have a big propeller mounted on the front to make them go faster.


Oh Bugger :thumbsup: Does the Betz thing screw my cunning plan? I suspect partially.
 
Hang on... i have had an idea?:whistle: prop.jpg Will that work? :laugh:
 
OP
OP
P

peelywally

Active Member
would a small fan cause any great drag on a relatively slower tour bike ,

considering your sitting up most of the time or on an urban mtb machine ?

if power output is as weak as you guys say its pretty much a waste of time :thumbsup:
 
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