Travel – NZ – Leonardo Da Vinci comes to Chrstchurch

Posted by jerry on October 6th, 2008 — Posted in History, Journal, Technology, Travel

For a couple of years now I have been trying to catch an exhibition of machine models made by Florentine craftsmen to Leonardo daVinci’s designs. The exhibition has been put together by the Florence museum and has been traveling the world. I just missed it in Sydney and then it was due to head off to Perth, then to Christchurch, but was due to finish there on 28 Sept. And it has not been widely advertised. So imagine my surprise when I spotted a desultory poster advertising the exhibition, and noting that the season has been extended to 27 October at Canterbury Museum in Christchurch!

Leonardo da vinci exhibition

I quickly cleared a morning and decided to go – there are 60 models from the simple to the complex, covering a good range of Leonardo’s designs.

At the entrance is a speculative full-scale model of the controversial bicycle – possibly drawn (crudely) by one of Leonardo’s apprentices, or possibly a rather later fake.

Leonardo da vinci exhibition

Either way, the bike lacked any means to steer, so at best it would have been something like the 17th century boneshaker. That said, Leonardo certainly drew designs of chain drives, noting their efficiency as a means of transferring power from one cog to another.

Leonardo’s studies for flying machines are well represented, including the flyable hang glider – tested in modern times, as well as the famous helicopter

Leonardo da vinci exhibition

The helicopter is derived from a children’s toy that was known in Italy at the time – and probably not too unlike the one I was able to get to fly, using a string pull – see the instructions here.

And while his war machines are well documented – and represented at the exhibition, I was particularly taken with some of the lesser known aspects of Leonardo’s work, notably his theatre machines. Leonardo was known for his designs for spectacular special effects in theatrical productions for his patrons. Some of these appear remarkably prescient, such as the magic lantern projector

Leonardo da vinci exhibition

And what has been touted as his car – actually a programmable stage cart that was able to steer a pre-determined course apparently sensing and avoiding obstacles. The cart was driven by bow-like springs, but it also had a separate spring-driven cam system for the steering – not highlighted in the exhibition, but demonstrated in other reconstructions of his models.

Leonardo da vinci exhibition

The catalogue is well worth the money, although the literal translation into English from the Italian is flowery and resmbles a machine translation rather than a full rendering into English. But it is very well illustrated.

All up the exhibition is excellent – with models very faithful to the originals and many hands-on exhibits. It is on now at Canterbury Museum in Christchurch NZ on Rolleston Avenue. Canterbury Museum is open every day (except Christmas Day)
Summer hours: 9.00 am – 5.30 pm (October – March); Winter hours: 9.00 am – 5.00 pm (April – September).

The exhibition – Da Vinci Machines: The Inventions and Designs of a Genius is on until 27 October, and prices are: Adult $12, child $8 (under 5 free), family (2 adults and 2 children) $35.00, students and senior citizens $10.00.

It is well worth a visit. You can see more of the machines here

Cheers
Jerry

Leonardo and the Engineers of the Renaissance

Posted by jerry on April 30th, 2004 — Posted in History, Technology

Now here is a seriously good site – it’s a pity the slide shows are all in Italian – perhaps I could learn it during the downloads (Italian servers seem very slow) but it’s well worth the wait!

This site is an online museum display of renaissance engineers’ work housed at the Museum of the History of Science (Instituto e Museo di Storia della Scienza) and the site is divided into three main entry points: Filipo Brunelleschi; The Sienese Engineers and Leonardo da Vinci. The 3D modelling is good and there are excellent descriptions of Leonardo’s flying machines (as well as his robots, crossbows, machine elements, etc etc). There are again hints that towards the end of his life, Leonardo focussed on fixed wing gliders and hints that a student of his may have actually flown (and crashed, breaking his leg). As for Leonardo’s helicopter, while there are the usual gripes about the inadequacy of human power, it clearly points to the helicopter being derived from a well known flying toy that appears to have been around for about 100 years before Leonardo’s time. So the principle must have been okay, just a poor power-to-weight ratio.

Also, having designed a steam cannon, and several pumps – it’s a wonder that he didn’t come up with a viable steam engine as a motive power. It seems to be a case of all the elements but lacking the one concept to link them together. Other forms of power were seriously considered, such as clockwork and water power – but it seems that was one that got away lest the industrial revolution happen 250 years earlier than it did!

Cheers
Jerry