Search found 18 matches

by John Perry
Tue Jun 19, 2018 2:54 pm
Forum: Technical Papers for review and comment
Topic: Kasala latest news: crutches’ corner
Replies: 10
Views: 1634

Re: Kasala latest news: crutches’ corner

Hi Alex A delayed reply since Josephine and I have been sailing along the coast of croatia in our sailing dinghy so not much opportunity for looking at internet. Yes, pushing might work, or perhaps towing from a pole extending from the side of the towing boat. We will try again some time. John Perry 8
by John Perry
Thu May 31, 2018 7:19 am
Forum: Technical Papers for review and comment
Topic: Kasala latest news: crutches’ corner
Replies: 10
Views: 1634

Re: Kasala latest news: crutches’ corner

Alex - Here is another one that also has twin masts rotating in a circle! - http://www.mathisruhl.com/P-WM70T.html
by John Perry
Wed May 30, 2018 10:19 am
Forum: Technical Papers for review and comment
Topic: Kasala latest news: crutches’ corner
Replies: 10
Views: 1634

Re: Kasala latest news: crutches’ corner

hi Alex - yes I would be interested to read about Croseck's experiments. The books you mention are available second hand from various websites but it would be convenient for me if you could email the study to me as you sugest. j_perry@btinternet.com. Thanks. Regarding your proposal to tow your boat ...
by John Perry
Mon May 28, 2018 12:30 pm
Forum: Technical Papers for review and comment
Topic: Kasala latest news: crutches’ corner
Replies: 10
Views: 1634

Re: Kasala latest news: crutches’ corner

OK, fair enough, the polar diagrams included in your article are just an idea of the performance you would like to achieve and (with tongue in cheek), since you don't have any units on the graphs I am sure the boat will achieve the performance you are looking for! But seriously, it looks as though y...
by John Perry
Sat May 26, 2018 10:17 am
Forum: Events & other announcements
Topic: Speedweek Trials
Replies: 4
Views: 556

Re: Speedweek Trials

Salvage - Sorry if you did not get a response in time, although maybe you did by private message. Yes, it did go ahead although with only a few people present. I went along for one day to see what was happening. On the day I was there Fred tried for the first time a small simple wingsail that he has...
by John Perry
Wed Apr 25, 2018 11:57 am
Forum: Technical Papers for review and comment
Topic: Kasala latest news: crutches’ corner
Replies: 10
Views: 1634

Re: Kasala latest news: crutches’ corner

Hi Alex I read your article about the 'Kasala' project in the current AYRS newsletter. It does look to be a very nicely built boat and I look forward to hearing about a successful launch - it seems that you have done nearly all the work and just need to buy some sails and bolt on a few off the shelf...
by John Perry
Fri Apr 20, 2018 11:01 pm
Forum: Boats
Topic: MicroTransat
Replies: 20
Views: 6180

Re: MicroTransat

A nice one at this link: http://www.bbc.co.uk/news/uk-scotland-north-east-orkney-shetland-43838985
Doing quite well considering!
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by John Perry
Tue Mar 20, 2018 6:28 pm
Forum: Boats
Topic: MicroTransat
Replies: 20
Views: 6180

Re: MicroTransat

Hi Mike, I expect that the AYRS membership would be interested to hear more about your design and your progress through this Forum and/or through AYRS publications so I hope that at some stage you will feel able to tell us more.
by John Perry
Thu Mar 15, 2018 6:22 pm
Forum: Boats
Topic: MicroTransat
Replies: 20
Views: 6180

Re: MicroTransat

Hi Mike Best wishes for your project, its good to hear that you have thought everything out really thouroghly. Just a quick comment on your comment that a water pump would just not be viable because of its power consumption. A very quick google search turned up this small pump, but there may well be...
by John Perry
Thu Feb 08, 2018 5:51 pm
Forum: Boats
Topic: MicroTransat
Replies: 20
Views: 6180

Re: MicroTransat

The Saildrone people now seem to have a whole fleet of autonomous model yachts roaming the oceans. Here are a couple of links:

http://saildrone.com/
https://newatlas.com/saildrones-csiro/53117/ - this one also has a mention of the clever 'Waveglyder' wave powered autonomous vessel.
John
by John Perry
Tue Jan 23, 2018 5:48 pm
Forum: Boats
Topic: MicroTransat
Replies: 20
Views: 6180

Re: MicroTransat

I attended the AYRS meeting at Thorpe (Surrey UK) on Saturday and at this meeting Richard Walker gave an excellent presentation of the team's approach to meeting this challenge - they have definitely put a lot of thought into this and should very soon be ready to start basic testing of prototypes, a...
by John Perry
Thu Dec 07, 2017 11:50 pm
Forum: Wind- & Water-turbines, Propellors
Topic: Yullah WAS Fishwics Brief Bio
Replies: 1
Views: 636

Re: Yullah WAS Fishwics Brief Bio

Hi Mike I am not the 'webmaster'here, nor do I no much about the design of yulohs, but since no one else has answered your questions I will try: Q1) - you seem to have appended your post to a post by Simon Fishwick in the section intended for new forum contributors to tell people a bit about themsel...
by John Perry
Tue Dec 05, 2017 9:04 pm
Forum: Events & other announcements
Topic: Royal Institute of Navigation Meetings
Replies: 1
Views: 802

Re: Royal Institute of Navigation Meetings

Did anyone get to the RIN lecture that Simon mentioned in the previous post? Is there any progress on any AYRS project in this area?
John
by John Perry
Tue Dec 05, 2017 8:54 pm
Forum: Hydrofoils
Topic: Sonic tubes
Replies: 1
Views: 1185

Re: Sonic tubes

Having just watched the part of the video that you refer to I have to say that this sounds suspiciously like an attempt to impress the viewer with scientific sounding waffle! If the presenter believes that the 'sonic tube' design provides a performance benefit then why does he not present data to su...
by John Perry
Wed Sep 06, 2017 4:59 pm
Forum: Technical Papers for review and comment
Topic: Howard Fund
Replies: 23
Views: 6664

Re: Howard Fund

Hi Alex - your workmanship, as evidenced by your photographs, looks superb! One point I would make with regard to keel section is that I think you need to consider the situation when the wind is strong, the boat is trying to go to windward so keel loading is high but speed through the water is very ...
by John Perry
Tue Jan 24, 2017 10:39 am
Forum: Events & other announcements
Topic: AYRS Devon Meeting - CHANGE OF DATE - 1st April 2017
Replies: 0
Views: 918

AYRS Devon Meeting - CHANGE OF DATE - 1st April 2017

We have changed the date for our AYRS Devon meeting to Saturday 1st April 2017. The reason is that the original date did not suit a couple of our local members. I realise that we cannot choose dates to suit everbody but the numbers attending these meetings have never been large, so the absence or pr...
by John Perry
Wed Nov 09, 2016 1:51 pm
Forum: Events & other announcements
Topic: AYRS Devon meeting - Saturday 11th March 2017
Replies: 0
Views: 1115

AYRS Devon meeting - Saturday 11th March 2017

The exact location for this meeting will depend on the level of interest. In past years the meeting has been held in John and Josephine's house at Wembury, a coastal village about six miles to the south east of the centre of Plymouth. This will probably be the location for our meeting in 2017, unles...

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