126 Reply by Joe

(7 replies, posted in General Discussion)

If you want to disable the lockscreen this is informative https://www.howtogeek.com/270493/how-to … indows-10/

Joe

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127 Reply by Joe

(130 replies, posted in General Discussion)

Tommy in a "I'm not happy about you taking this photo" mood.



https://i.postimg.cc/wyZ9MB7G/Tommy.jpg

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128 Reply by Joe

(19 replies, posted in Mathematics & Science)

GB wrote:

A xylophone uses wooden keys.

Perhaps we could add a glockenspiel to the thread to represent the metal version.

GB wrote:

I think it would be extremely difficult to make keys producing the correct note narrow enough to be so closely spaced as to be capable of being struck by a single mallet.

You could have four keys spaced and arranged in a stack. Strike the top key and the three beneath are struck
simultaneously.

GB wrote:

Why not use a three-headed mallet?

How would you strike three keys with perpendicular accuracy?

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129 Reply by Joe

(19 replies, posted in Mathematics & Science)

Yes it probably is possible, but may be more accurate by having one key strike three or four keys. To enable you to play a three chord  major progression in any key (eg. A D E) 12 chords are required. For a four chord progression (eg. A F#m D E) the 12 minor chords would be added. Quite a number of keyboards allow you play a chord with a single key press.

This may help with the chords https://autochords.com/

Joe

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130 Reply by Joe

(7 replies, posted in Mathematics & Science)

Hi William,

Thanks for you interest.

The hinge effect would 90 degrees where the blade would fold back in the opposite direction of water flow only. It would continue to fold back even as it enters the water and present a minimal surface area. I do agree that having moving parts in this type of application is not the best.

On blade design I've used https://www.backwoodshome.com/design-ca … terwheels/ for the calcs and the paragraph at the end of the calculation explains a bit about the blade design.

Joe

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131 Reply by Joe

(7 replies, posted in Mathematics & Science)

Yes, that's it William. but the panels are hinged so they fall back when out of the water.

Joe

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132 Topic by Joe

(7 replies, posted in Mathematics & Science)

For a few weeks I've been looking at all sorts of schemes to generate around 5kw of electricty. Along one boundry I have a stream 3m wide flowing at between 2-4 m/s. These are old numbers from the EA who used to have instrumentation on our property. I found some undershot waterwheel calcs online and these indicate about 0.6kw based on a 1200mm dia wheel with a blade size of 530 wide x 225 high.  The calc assumes one blade fully in the water at any one time.

I've come up with a new design of waterwheel where I can have say 7 or more blades in the water in a linear style, using the same sized wheel.  Does this mean that I can generate 7 x 0.6kw= 4,2kw or am I completely wrong?

Any help with this would be much appreciated.

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133 Reply by Joe

(15 replies, posted in Mathematics & Science)

15283

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134 Reply by Joe

(10 replies, posted in General Discussion)

Sorry... the coffee hasn't kicked in yet and I'm feeling silly.

Robert,

Being silly is a prerequisite for joining this forum and for being Welsh. This is the longest town name in Wales:

Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

Google it and see, and then tell me if that's silly.

Joe

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135 Reply by Joe

(10 replies, posted in General Discussion)

jackneve wrote:

That's a very interesting site, Joe, but have you found it to be reasonably accurate?

Hi Jack,

It's the same site that quite a few newspapers use, and winds are now dying down here, just as it shows. A while back I did a demo in Webplus showing how to add it to your website

Joe

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136 Topic by Joe

(10 replies, posted in General Discussion)

Time to consult the old interactrive Ventusky weather map. Wind speeds at the moment along the Cornish coast are around 40 - 50mph which is nothing out of the ordinary, but it looks like Wales is going to hit badly.

https://www.ventusky.com/?p=54.0;-4.7;5&l=wind-10m

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137 Topic by Joe

(0 replies, posted in General Discussion)

Image 1a is our our bird feeders and shows the back of a woodpecker as he collects peanuts from the feeder with the rusty top. This feeder has less peanuts in it than the other feeder. To the right of the feeders is a branch with a split in it.

Image 2a. The woodpecker has taken a peanut, jammed it in the split in the branch and is pecking/eating it. He repeats the process a number of times. Quite clever. In engineering terms he's created a fixture ( an item that holds something whilst it's worked on).

The other point of the images is the level of peanuts in the two feeders. They are both filled at the same time, with the same amount from the same sack of peanuts. The rusty top feeder is always depleted first. Swapping their positions under the little roof makes no difference. Has anyone any idea's why the birds prefer that feeder?

Besides the woodpecker other birds using the feeders are great tits, blue tits, long tailed tits, a solitary coal tit, the odd dunnock, a pair of black caps in spring, and a robin.

The photo's were taken last year but same situation today.

Joe
https://i.postimg.cc/YhC0xv2M/1a.jpg

https://i.postimg.cc/vD3HDGrj/2a.jpg

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138 Topic by Joe

(2 replies, posted in Mathematics & Science)

Some food for thought in this Daily Mail article.


https://www.dailymail.co.uk/news/articl … ravel.html

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139 Reply by Joe

(12 replies, posted in General Discussion)

I have a PHP newsletter signup/compilation/send program which uses these tags {} as tokens. In the newsletter if you enter Dear {FirstName}, when sending it will pick the first name of each subscriber from a database and insert it place of the token. Others available are:

{LastName}
{Email}
{Phone}
{Website}
{Gender}
{Age}
{Birthday}
{Address}
{City}
{State}
{Country}
{Zip}
{CompanyName}
{Unsubscribe}

Joe

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140 Reply by Joe

(12 replies, posted in General Discussion)

I don't think Uber exists in Cornwall. Bit of a watste having a smartphone now I think about it big_smile , but we do have taxis that after you call them, they will be with you dreckly.

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141 Reply by Joe

(2 replies, posted in General Discussion)

Is the value of the capacitor correct for the size/type of tube?

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142 Reply by Joe

(328 replies, posted in General Discussion)

It has to happen.


https://i.postimg.cc/0rHcdc4R/truck.jpg

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143 Reply by Joe

(32 replies, posted in General Discussion)

Does anyone want legacy products on here? If so, webplus, pageplus and movieplus are good for me.

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144 Reply by Joe

(52 replies, posted in General Discussion)

Hello to all and thanks for setting this up Alfred.

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