[CliffordK]

CliffordK, I have to say that this flying machine isn't that far off from a design of a modern day hang glider..

I think Leonardo's design was to flap the wings, and take off from the ground like a bird.  Your hang glider looks more like a buzzard condemned to take off from mountain tops.  But, having mimicked birds, Leonardo's wings do look surprisingly aerodynamic, and may create lift.

What about Leonardo's Screw Machine?

[Don_1]

Look, never mind all of these, we all know the answer to this question......

[Geezer]

The Lartigue Monorail system would be hard to beat. Even more so because they even tried it in Ireland.

http://en.wikipedia.org/wiki/Lartigue_Monorail

(You must read the bit about the transportation of a cow.)

[CliffordK]

What about Antoine Louis & Tobias Schmidt  [xx(]

Oops, I see that was already taken by wolfekeeper.

How do you define an invention that the inventors are unwilling to test themselves?

[CliffordK]

What about Bull Durham (company), and the invention of prepackaged cigarettes.

[CZARCAR]

go ask rube goldberg or god

[Airthumbs]

I think I found a pretty bad invention, I am going to provide the link to the advert for it here, in a way this could be classed as spam but you would have to be pretty stupid to buy one!  I just checked the website given in the youtube advert and you will be pleased to know that even if you did want to buy one you will not be able to as they went under so to speak a long time ago, lol.

It is called the comfort wipe.  I thought it was a hoax at first but apparently it is a real product.

I watched this advert in utter amazement that someone out there actually paid to get this thing developed and then paid for the advertising.  As inventions go I would have to say it is pretty bad but what makes it worse is the trouble they went too to promote it. 

[Kryptid]

Perpetual motion machines and reactionless engines are some of the worst since they don't work.

[Geezer]

It is called the comfort wipe. 

Ye gods! "Extends your reach a full eighteen inches."

[Airthumbs]

Ye gods! "Extends your reach a full eighteen inches."

That is the part that made me chuckle. Absolutely ridiculous!  [:0]

[CliffordK]

About this time of year, farmers across the Northern Hemisphere are found standing around in circles cursing the very existence of knotters.

[tombyers]

My least favorite invention is the price tag that takes forever to remove. The same idiot probably invented the glued-tight advertisement stickers that also take forever to remove. I will never buy Rubbermaid again because the outside of the container was just covered with propaganda about how wonderful the product is. Half an hour of peeling and soaking failed to remove all the leftover glue.

[CliffordK]

Pot Metal

[Don_1]

My least favorite invention is the price tag that takes forever to remove. The same idiot probably invented the glued-tight advertisement stickers that also take forever to remove. I will never buy Rubbermaid again because the outside of the container was just covered with propaganda about how wonderful the product is. Half an hour of peeling and soaking failed to remove all the leftover glue.

Geeze, you had me worried there for a min! I'll not tell you the kinky pictures which went through my mind.

[SeanB]

On that vein I will put forward that clamshell plastic wrapping that is impossible to open without either a knife or without cutting yourself.

[Geezer]

On that vein I will put forward that clamshell plastic wrapping that is impossible to open without either a knife or without cutting yourself.

Somebody invented a special tool for opening those things. Comes in a plastic clamshell package.

[CliffordK]

What about Charlemagne & King Offa of Mercia, and the invention of the most complicated monetary system imaginable.

[Don_1]

What about Charlemagne & King Offa of Mercia, and the invention of the most complicated monetary system imaginable.

Ah yes! The king made an offa Charlemagne couldn't refuse.

[Bored chemist]

The curried tuna I once made could count as an all time bad invention.

[Don_1]

For an anniversary gift, a few years ago, we were given a smoothy maker. 'Great', thought I, I love smoothies and now I can make my own, with the fruits I like the most, raspberries, loganberries, gooseberries and so on and so forth.

At the time 1ltr of a popular brand of smoothy cost around £1.50 from most supermarkets. I now discovered, to my horror, that the cost of sufficient fruit to make around ½ltr of smoothy was coming in at around £5. Needless to say, the smoothy maker has been consigned to the back of that kitchen cupboard where similar useless stuff is stored until the day it is either flogged in a boot sale or heaved in the bin.

What reminded me of this was BC's curried tuna. I do, all too clearly, recall making a smoothy from cucumber, which I find a very refreshing salad ingredient and is, after all a fruit. I don't think I have tasted anything so vile in my entire life.

I'll add smoothy makers to the list of bad inventions.