Search found 244 matches

by Rex NZ
Sun Oct 19, 2014 9:30 pm
Forum: General Topics
Topic: Mk1 Ignition system
Replies: 30
Views: 19388

Re: Mk1 Ignition system

Adrian & others Ignition capacitors are quite easy to check. No need to remove. Just disconnect it in situ. Just use a good multimeter. Set to to capacitance & apply the probes. I'm not quite sure of the villiers original value, but I'd guess approx 0.20uF. If it's buggered, then that value is likel...
by Rex NZ
Thu Jun 19, 2014 9:29 pm
Forum: General Topics
Topic: sailing terms - translation question
Replies: 4
Views: 4524

Re: sailing terms - translation question

Charan As for the wind direction; Basically you would describe the wind &/or shore from your perspective on the boat. So, In your island example with a northerly wind; If your boat is north of the island, you'd have a 'sea breeze' & a 'lee shore' or (leeward shore) If your boat is south of the islan...
by Rex NZ
Fri Sep 27, 2013 8:12 pm
Forum: General Topics
Topic: Finding Workshop Again #2
Replies: 32
Views: 17781

Re: Finding Workshop Again #2

CI

Maybe if you build another 6x ends of the opposite hand
then
you'd have twice as many racks

R
by Rex NZ
Thu Sep 26, 2013 7:47 pm
Forum: General Topics
Topic: More way off topic, America's Cup.
Replies: 13
Views: 9442

Re: More way off topic, America's Cup.

My understanding is the crack team of naval architects were 'Core Builders Composites' of Warkworth. They were the original builders of Oracle. Interestingly they kept the original appendages on Oracle & focussed on tuning in the automated continuous trimming system. Photo from inside their workshop...
by Rex NZ
Tue Sep 24, 2013 9:23 am
Forum: General Topics
Topic: More way off topic, America's Cup.
Replies: 13
Views: 9442

Re: More way off topic, America's Cup.

Americas Cup is absolutely huge here in NZ. Massive TV coverage in NZ. Plus daily live TV coverage every morning from San Francisco. Apparently half the country has been turning up late to work every day for the last week or so. I've think figured out why Oracle has shown a sudden turn of speed, it'...
by Rex NZ
Sat Sep 21, 2013 8:00 pm
Forum: Help
Topic: The Weldability of a Seagull?
Replies: 3
Views: 4773

Re: The Weldability of a Seagull?

Ed

You could weld it
however,
it'll work out cheaper & neater to replace the crankcase half

R
by Rex NZ
Wed Sep 04, 2013 8:55 pm
Forum: General Topics
Topic: Can prop be changed to improve performance?
Replies: 13
Views: 10480

Re: Can prop be changed to improve performance?

Waterbug Thin blades drag less & waste less energy. Water is very viscous at speed. Maybe think of it like wet clay The cupping of the trailing edge is a good observation. Basically cupping an ordinary prop 'fools' the water into thinking the blade is longer (read greater area) than an non-cupped bl...
by Rex NZ
Mon Sep 02, 2013 8:43 pm
Forum: General Topics
Topic: Can prop be changed to improve performance?
Replies: 13
Views: 10480

Re: Can prop be changed to improve performance?

Charles UK Yes, there is a co-relation between load & slip. However, (in theory at least) if you let too much slip occur, then, you can end up wasting alot of energy The barge pusher designs show they are made for heavy/ugly loads Low gear ratios & big diameter props with lots of blades http://www.n...
by Rex NZ
Sat Aug 31, 2013 8:54 pm
Forum: General Topics
Topic: Can prop be changed to improve performance?
Replies: 13
Views: 10480

Re: Can prop be changed to improve performance?

All props must slip in order to achieve drive Ships setup well slip at about 5%, poorer ones at about 10%. Numbers like 30% - 50% slip could use a bit of work (common seagull range) This is where the sword cuts both ways; (Theory vs Practice) You can reduce a prop slip by increasing the working driv...
by Rex NZ
Tue Aug 27, 2013 9:52 pm
Forum: General Topics
Topic: Can prop be changed to improve performance?
Replies: 13
Views: 10480

Re: Can prop be changed to improve performance?

When you compute some performance numbers on seagull props, it emerges that they 'slip' badly

Increasing the drive face area lessens this loss

Basically you need more blades

Image
by Rex NZ
Tue Jun 11, 2013 7:37 pm
Forum: General Topics
Topic: Totally off topic.... welding
Replies: 14
Views: 7426

Re: Totally off topic.... welding

Hugz

Age of the vehicle doesn't have much to do with anything, except prestige & B/S like that.

If the steering box has excess working clearance, then, have a look for an external float adjustment. However, don't reduce the clearance to zero, there must be clearance in all steering positions.
by Rex NZ
Mon May 27, 2013 1:26 am
Forum: Events and Racing Seagulls
Topic: Murray River - "Summit to Sea"
Replies: 7
Views: 7373

Re: Murray River - "Summit to Sea"

Mark This is all a real shame. If we had enthusiastic people like yourself here, we could easily double the number of seagull adventures. Even tho it was a few years ago, people here still talk of 'Mark the Ozzy' & the your part in the Waikato run. Ideas; * Maybe focus on smaller day runs like the '...
by Rex NZ
Sat May 25, 2013 10:46 pm
Forum: Events and Racing Seagulls
Topic: Murray River - "Summit to Sea"
Replies: 7
Views: 7373

Re: Murray River - "Summit to Sea"

Mark

Is the 'Annual National Gathering' at Lake Hume, still on?

The plan was for Ozzy Labour Day Long Weekend 5th-7th October 2013?

Rex
by Rex NZ
Thu May 16, 2013 11:15 pm
Forum: General Topics
Topic: Regular backfire
Replies: 11
Views: 7691

Re: Regular backfire

Winter Compression test would be good. 50 psi is okay Perhaps remove the cylinder & measure the end gap in the rings. :idea: 0.004" is OEM spec. 0.008" is about your outer limit, Beyond this you'd be looking at honing & re-ringing. I'd suggest a fairly coarse hone to defer the onset of glazing. :win...
by Rex NZ
Wed May 15, 2013 9:27 pm
Forum: General Topics
Topic: Regular backfire
Replies: 11
Views: 7691

Re: Regular backfire

Winter A possibility is combustion within the crankcase Basically what happens is the motor fires as usual & the blow-by flash then ignites the crankcase charge, which goes with an almighty bang, the motor faulters then recovers & the cycle repeats. This is a problem with very worn motors suffering ...