Wednesday, December 1, 2010

who wants some?


There is a factory outlet shop nearby selling these bad boys for $8.25.
You read right - 2.3kg of lasagna for $8.25.
Leading up to, and during the worlds, I shall be eating nothing else. 
I will bring a esky full of them with me on the 1000km drive down to belmont. 
Anyone want me to bring them some? 
It's gonna be windy.
I am taking orders.



Bootnote: Factory outlet shops sell defective, expired or excessive supplies of product. 
Therefore there is something wrong with the above. 
However you may also ask, what is right about it. 

Tuesday, November 30, 2010

what would tucker do?

On Saturday, Peter, my brother and good friend of teh bloog turns a quarter of a century old. We decide to celebrate by going to a gig. No known band playing in bris tonight except kidney thieves. That’s the gothic industrial dance act right? Played something from the queen of the damned soundtrack? They are on the bill for MENAGERIE 2010 feat. The Kidney Thieves + Tin Can Radio + Slimey Things + Pirate + Greenthief. $15 cover charge – thats like 3 dollars a band = value char-ching. This is what happened.

19:01 - load up on dirty bird – gonna be a long night

19:24 - teh valley smells of arse.

19:29 - While outside the globe Peter antagonizes a skinhead in a stoke city jersey. He leers at us. We make a break for the Globe Theatre. Skinhead is afraid of culture – or knows what awaits us.

19:31 - Inside the globe. Resembles a cinema stripped bare with a stage instead of a screen. Nice layout, everyone can sit to watch the support acts so you can bob your head along with minimal exertion. Except for some loon with dreadlocks who is jumping about like green ants have crawled up his arse even without music playing. We consider telling him he’s retarded but fear getting whipped by knotty dreads.

19:45 - Greensthief start playing. They rock. I have forgotten how good live music is.
19:46 - Greensthief start singing
19:47 - Greensthief should stop singing.
20:31 - Greensthief conclude set with a suggestion to the assembled mob (not around 12 peeps) that we buy their $5 album. I’d rather snort $5 of wizzfizz.

20:39 - Thought of wizzfizz makes me thirsty and crave caffeine. Ask barmaid for two Red Bulls. Get two generic, overpriced energy drinks. “Just as good as red bull but without the taurine aftertaste”. Féin interest cause she has a cute smile.

20:43 - frontman of Pirate appears bearing a saxophone with pickup. Plugs it into amp and smoke appears. Visions of burning saxophonist spring to mind. Hilarity ensues.

20:44 - Smoke actually coming from an anaemic smoke machine. Frontman tries out his sax+fuzz box combo – hilarity does not ensue. They begin to play soon after.

21:11 - Set highlight – drummer plays a complex 3 against 4 pattern which is incredible. Guitar bass and sax play something...anything... trying to hold on to the beat.

21:26 - Third band, third saxapone. We check a blog post regarding the gig. Turns out its ‘progressive night’ at The Globe. Given the way this gig is rolling out we begin to wonder if the kidney thieves are not THE kidney thieves.

21:43 - Slimey Things play ‘when household appliances attack’ woo!
21:48 - Slimey Things play ‘White goods off destiny’ woo!

21:54 - an ironing board is sighted on its way back stage. Slimey Things make some remark about their ‘imperial ironing concubines’. Wish they would pay more attention to our entertainment than their laundry. Slimey Things conclude set telling us “Tin Can Radio will be better”.

22:03 - Go back to see cute bar girl again. Many others have same idea. Get serve by some random wench instead thus wasting another $9 on energy drinks. Now have spent more on drinks than we have on the bands.

22:30 - roadie in a pedo bear shirt and a bass player dressed as Jesus - this is going to be good.

22:49 - Tin Can Radio play like runaway train - teh tempo is outta control! But very trippy and cool

23:05 - Jesus's dancing puts his tight white pants at serious risk of splitting

23:09 - cop an eyeful of cock interlaced with bands rear-projected graphics

23:14 - inevitable happens – Jesus’s pants split midstance – another eye full of cock. He continues on in coke fuelled fury unabashed.

23:15 - other inevitable happens. Douches sitting uphill of us, shocked by second cock of the set, knock over whole jug of beer. Pours downhill between Peter and I before soaking into the pants of a drunk chick sitting in front of us. She jumps up and yells at us. we point to the trail of beer. She leaves. Tin Can Radio finish their set.

23:28 - A saxaphone stand appeared. Surely not a fourth one of the evening.
23:29 - False alarm - just a guitar stand.

23:38 - Kidney theives’ roadie is fat and wears a warhammer tshirt. Much more professional. maybe this is real kid thieves after all?

23:47 - Four sets of dreadlocks now on the stage. Very metal!
23:48 - Fifth member has no dreads and plays a sax and glockenspiel. Not very metal. And no sign of the lead songstress. I think we have been deceived.

23:49 - Band begins. Clearly not who we were expecting or hoping for. Aren’t their laws prohibiting this form of blatant misrepresentation? We didn’t part with our $3 to hear this progressive trot. Now very angry. Box office staff to too stoned to care. Contemplate what would tucker do? Return to heckle band.

23:55 - Lead singer starts swinging mic like a tiny flail. Hits own head with mike. Makes a satisfying percussive thud. Not professional. Wouldn't happen to real kidney thieves.

23:59 - Drummer dumming without shirt and with mouth open irritates.

00:04 - Frontman asks “Are you annoyed by retorical questions?” Attempt at wit irritates further

00:13 - Play Faith No More’s Epic. Crowd goes off. Should stick to covers

00:25 - Set concludes. Band try to hide stage right trying to beg for an encore. Crowd complies half-heartedly.

00:26 - Band say they are allowed to play one more song if we all leave the venue by midnight. But they are willing to catch up with us afterwards outside over a cigarette. We decide to call it a night instead.

Thursday, November 25, 2010

Hat-trick!

Finished in 3 days the way this is going... ;)

http://www.brisbanetimes.com.au/sport/cricket/siddle-hattrick-rocks-england-20101125-187zw.html

Another wicket just fell, now 9-254. Wouldn't want to be a pom...m4rkla, do you identify as one for cricket purposes?


OOHH SHIT! No you didn't!

Wednesday, November 24, 2010

Luka's Lister Boom

For anyone interested in the merits or otherwise of Luka's boom I present the following. Be warned, it was done in about 10 mins while I was having lunch at work so it is a bit simplified...

150kg vertical leech load
100 diameter thin wall steel boom
10mm round bar steel vang
20ish mm round bar "spreader"
2.5m boom
400mm gooseneck to vang take-off

Conventional Boom


Bending Moment


Deflection = 14.5mm


Luka Boom Arrangement


Bending Moment


Deflection = 13.2mm

A little over a tonne of tension in the vang in the conventional arrangement and a little under a tonne for the Luka setup.

Is it worth the complexity?

Monday, November 22, 2010

wing rule idea

remove the single sail condition.
make all masts, booms, sails and wings (essentially everything about the mast base) count into 'profile area'.
Restrict 'profile area to 8.44m2 or whatever its supposed to be at the moment.
Add an upper limit to the 'box rule' measured from deepest point to top of rig.

If this results in people building multiple high aspect ratio rigs then so be it as long as it is faster round the course.

Saturday, November 20, 2010

nick in teh boat







Tuesday, November 16, 2010

Wanted

Any internationals want to avoid return shipping costs by selling me their boat after the worlds? Probably asking a bit late now but I'll put it out there anyway.




Oh, and Markla would like to buy some skill. Preferrably before the worlds. Bora or Adam may have some skill they won't need with their rumoured speed advantage. Cash it in!

PS. Did I see correctly, two wings going into the US container?

Sunday, November 14, 2010

SLINO Design Files



Please Note:
I am publishing this information as a personal reference only. If you chose to replicate it, it is at your own risk. This information carries no warranty and has not been thoroughly thought through or engineered. Building and sailing a moth to this design could seriously hurt you and/or cost you a lot of money and/or cause emotional damage.

If you do attempt to replicate derivate from this information please send me an email – I am always interested to see where this design leads. (mr.markla@gmail.com)


See Also:
http://perverted-moth.blogspot.com/2009/01/new-moth-design.html


Documents and Calculations
SL2-A1-01A - Drawing and Document List
SL2-A1-02A - SLINO Build Sequence
SL2-A1-03 - Parts List
SL2-B1-01 - Weight Estimate
SL2-B2-01 - Table of Hydrostatics
SL2-B2-02 - Resistance Prediction


Drawings

SL2-C1-01 Side Profile Drawing
SL2-C1-02A - General Arrangement

SL2-D1-01A - Hull Lines Drawing

SL2-E1-01A - Hull Construction Drawing
SL2-E1-02__04A - Hull Construction Details
SL2-E2-01__02A -  Centreboard Construction Drawing
SL2-E3-01 Stem and Transom Lug Construction Details
SL2-E4-01 Wing Mounts Construction Details

SL2-F1-01A - Wing Assembly
SL2-F2-01A - Gantry Construction Drawing
SL2-F3-01A - Spreader Construction Drawing
SL2-F4-01A - Running Rigging Arrangement
SL2-F5-01__02A - Cradle Arrangement

SL2-G1-01A - Control System Arrangement
SL2-G1-02A - Control System Parts

SL2-H1-01A - Hull Jig Assembly
SL2-H1-02A - Deck Jig Assembly
SL2-H1-03A - Foredeck Jig Modification

SL2-I1-01A - Carbon Cut File (1)
SL2-I1-02A - Carbon Cut File (2)

SL2-I2-01A - MDF Cut File (1)
SL2-I2-02A - MDF Cut File (2)

SL2-I3-01A - Hull Panel Marking
SL2-I3-02A - Deck Panel Marking


Rhino Models
All models have the same zero point, so you can import (or worksession) the components into a single file.
SL2-R1-01A - Hull Construction
SL2-R1-02A - Hull Jig
SL2-R1-03A - Wings

SL2-R2-01A - Centreboard

SL2-R3-01A - Rudder

SL2-R4-01A - Control System

SL2-R5-01A - Wing Sail

SL2-R9-01A - Cradle

Thursday, October 21, 2010

Weather at Belmont


While I am loathed to average and average, the above is the average of the wind speed at the 3 closest weather stations at 9am and 3pm.

Make of it what you want.

Original spreadsheet here.

Data found here.

Wednesday, October 6, 2010

Ride Your Bike

Markla and I have been doing a fair bit of mountain biking as fitness for the mothing. This weekend we're hitting the road though for a 100km charity ride from Brisbane to the Gold Coast. The forecast is fantastic, 20 knots on the nose and rain...yippee...sigh :(
And it's freakin' magpie season! How did I get talked into this?

It seems I haven't commented on the wing sail yet. What little I've seen looks like a very good implementation. Still a bit nervous/dubious about its durability but that can only be proven one way or the other over time. I hope it holds together and is a successful new addition to moth development because I can't wait to start building one...although still want to work on the transportability issue.

SLINO is back together with a couple of mods...nothing that hasn't been implemented by others previously though; a Lister lever (of some description) and a tension linkage system. We felt the tension system was easier to implement and trouble shoot than the pushrod, especially with temperamental foils. The main foil got a coat of paint and a fine wet and dry so is looking considerably better than before. If the Lister level doesn't "Chernobyl", the rudder hinge will be locked off and faired to reduce drag, maybe even get a bit of a shortening of the span. There were some annoying issues with the pocket luff material of the North sail, but that has been given a work over by the local sail maker. Also trying to get the rig right, we felt the mast was not bending correctly so have played with the spreaders, they're a fair bit closer to the mach2 geometry now.

And who is NZL 3315? It appears you've gotten a slightly out-of-place photo on the interwebs...

http://www.surtees.co.nz/home.aspx
(Not associated with this company, just found it randomly.)

Sunday, August 29, 2010

4 – Accident With Local Consequences / steve mothing

there was an unnatural amount of dust gathering on boat, and we finally had wind for the first time in months so we tried to take the boat out today. water was the coldest i have ever felt the gold coast.


session finished 20mins later after I chernobylled another gantry and push rod.



nick took a short vid of steve sailing:


Click me for more photos of Steve.

Monday, August 9, 2010

spreader construction booring.


while the world is ablaze with wing rigs, I just did a booring sketch woot to answer the question below.

Hi Mark,
...The cut file you provided included spreaders, but judging from your email you haven’t converted these into a finished product previously? My plan is to tip the spreaders with glass to stop the wear from the stays, and to add uni down the sides to cover the core and to give it some more strength. The Bladerider spreaders have a protrusion on the spreaders that fits into the fitting on the mast that you sent a photo of. I’ll search in the Ronstan catalogue for something similar to the fitting that John Illet uses on his spreaders, but in the absence of a ready made solution, I’ll just cast something in glass....

Yeah, I had every intention of making myself carbon spreaders, but I had an alloy set lying about and I have been using them ever since.
The cabon cut file for the spreaders is still sitting in the garage and may get finished some day.

Attached is a drawing about how I was going to do it.
The key is:
  • Remove the core from the tips of the spreaders.
  • Lay up some solid fiberglass (not carbon - glass is harder wearing, alternating passes of double bias or woven roving is ideal) plate to 5mm thick
  • Cut the fiberglass plate to shapes that will fit inside the decored area.
  • Glue the fibreglass plate in and then lay some 200 uni carbon (UD-C) over the top of the cut part over the length of the spreader arms.
  • The spreader base can be made the same way, cut an E glass part that is approx 60x20, with a radius and a pin hole where it will attach to the mast.
  • The UD-C should lap over the top of the protruding part of the E Glass plate.
  • Ronstan part is RF917 with the pulley drilled out

I haven't tested this laminate yet, but seeing how light on the prowler spreaders are I think it should work. As soon as the UD-C has cured you should have a good idea if it is strong enough.

Cheers

Mark.

Friday, July 30, 2010

Ski Trip Bazinga!

The gang are off for a ski trip to NZ, specifically Mt Ruapehu, starting this weekend!

Markla and Nessie should be taxiing now with the rest of us stragglers coming in waves tomorrow.

Wish us luck and no broken bones...

wings

i did up a drawing of the wings on my boat for reference to the new slino. this drawing is available thru my google docs (i will gradually transfer all of my drawings to this site - still not sure where to put the rhino model and cad files, for now these can be emailed on request).

at the moment I am running aluminium wings as noted on the drawing. i also did some calcs for equivilent carbon wings (based on CST products):

76x1.27 Aluminium (EI 14.37kN/m2)
*ID63x1.8 Carbon

50x1.6 Aluminium (EI 4.92kN/m2)
*ID35x2.5 Carbon
ID40.4x2 Carbon
ID44.7x1.8 Carbon
ID47.2x1.5 Carbon

40x1.6 Aluminium (EI 2.46kN/m2)
ID32x1.5 Carbon
*ID30x12.6x1.5 Ellipse Carbon

As drawn in aluminium the wings would be approx 7.47kg
Using the alternative carbon sections marked with * above gets 4.72kg

A bugetary price for aluminium tubes is $266, for carbon $1873 (again using the * sections)

Wednesday, July 28, 2010

new slino

i can't remember when but I sold the jig-mould-thing to a guy in melbourne and gave him some cut files so he could build a boat like mine. i just got some photos of his progress and they are attached.


gotta love the stealthy look.





more details as they become available.

Wednesday, June 2, 2010

plug 2

while in the mood for plugging reasonable looking companies I can across a guy (when they let me out of my exhibit) at the Sanctuary Cove Boat Show selling this stuff:

Hull speed super glide
http://www.hullspeed.us/hullspeed_products.asp#superglide


It looked rather neat. Very easy to apply, just use one of these basic spray bottles to apply to the surface and then give a circular wipe with a clean white rag. Being a 2 part system it will cure on the foil surface and is good for up to 3 months. It does not need to be buffed like a polish system, just wiped into a thin film.

It looks ideal for foils and apparently olympic dinghy teams are using it. Anyone else tried it?

From Phil @ Dulon...
$195 per quart kit and that would last you until you are grey and unable to race moths I should think!

Tuesday, June 1, 2010

Rapid Prototype

For the last few weeks I've had a Bladerider RX to play with. It has undergone a little bit of minor damage (standard fare for a moth) including busting a plastic spreader base fitting. With no success reaching BR, I tried my hand at something I've wanted to do for awhile...RAPID PROTOTYPING.

Some basic rhino modelling and a couple of ridiculous quotes later ($100s), shapeways came to the rescue. $11.70 for the part, but minimum order of $25(ish) and 10 days later my two spreader end replacements have arrived!

The broken spreader end, the model and the final part.

The material is what they call white, strong and flexible and now that it is in my hand, it seems just about right.

So if you've got no time, tools or skillz for building some small fiddly bit, give rapid prototyping a go. If you've got no modelling skillz, let me know and I can probably whip something together for you (within reason).

Must resist the urge to pimp the boat, but if there is enough interest for certain items I may consider stocking some bits and pieces.

Aside - They can rp metal, glass and sandstone as well!!! Unbelievable stuff!

Disclaimer - I have no affiliation with shapeways, my experience is that their service and price have been really good, so they deserve a plug.

Sunday, May 23, 2010

Wing Design Concepts

The moth has been and should continue to be a development class so the natural next progression is towards a better aero package.

It's probably no surprise to learn that we have been designing a wing sail for a moth...as we suspect a lot of other mothies have been doing. They've been around for a while on C-class cats and seem to work well. Below are a couple of notes for developing a wing rig for a moth:

Requirements
  • Weight - tricky one, extra weight can be acceptable if the boat is faster around the course. consult VPP
  • Watertightness - gotta be able to right it after a capsize
  • Survivability - not essential but handy. if repairability is high not as important
  • Repairability - if it breaks, must be easy to repair in a boat park
  • Better Performance - waste of time otherwise, although it would be cool, consult VPP and mojo
  • Transportability - not all of us can afford to pay ppl to look after our boat 24/7. break down to either component parts or easy to fit in a regular trailer. 2x2 piece option may work
  • Cool - can't look too shabby
  • Cost - preliminary costings indicate that unless it is a full carbon monolith, the cost shouldn't be too extreme compared with a traditional rig (mast, stays, sail and development of these). mods to the hull are another matter, particularly if the requirement is to switch back to conventional configuration quickly and easily.
  • Arrangement - A stay-less wing rig seems like the best option on a moth. On shore handling and durability of the rig are the primary concerns with stays. This isn't locked in stone though.
  • Construction - Good if it can be homebuilt without special requirements (space, tools, etc).
Our revisions so far
  1. full composite - likely to be too heavy and expensive
  2. composite and heat shrink - not a bad solution in terms of weight and cost, used by C-Class et al ie proven construction, transport is a killer
  3. sock over frames - with spinnaker clothe, light, cheap, not likely to be water tight and durability concerns
  4. styrofoam modules - cheap, heavy, don't capsize on a petrol slick, UV issues, water absorption issues.
  5. composite and heat shrink modules - demountable for better transport, a bit heavy, easy(ish) to build
  6. composite and heat shrink nested modules - easily transportable, not too heavy, but stiffness might be an issue without careful designt. Nesting refers to the open bottom which slips over the module below when rigged. All modules nest together like a russian doll for transport.
  7. composite and model foam nested modules - easily transportable, not too heavy, easily repairable, cheap enough, better stiffness than with heat shrink, free flooding but also free draining.


Option 5 (frames top and bottom)


Option 6 (note open bottom, glass leading and trailing edges shown)

The spar would just be a square carbon beam, nothing fancy and easy for a home builder with experience.

Note that we haven't even gone into performance and shape requirements yet, it is believed construction is the biggest hurdle to overcome.

Will it be feasible? Can we be bothered to build one along with the hull and beam modifications?

You'll just have to wait and see...or do it yourself...

Thursday, April 22, 2010

QLD States

QLD moth states over 17-18 April.
Probably the first regatta where the foilers leaked more than the scows.
Fleet was 3x M2, 1x BR RX, 1x BR x8, 1x Assassin, 1x Home built foiler, 1x LR HT, 5ish scows.

More photos here, some are good.



I got back from a trip to china on the 17th, was hoping to make it out on the 18th but was struck down with teh ills, so i caught a ride on a rescue boat instead.

Perfect weather, nice easy 13kts or so when i was there on teh sunday. Appartently the saturday was much windier with some short chop.



Final foiler results:
1. Brent Pearson
2. Sandy Cavill
3. Steve Sherring




Final results for scows:
1. Mick Kohler
2. Pete Williamson
3. Mike Willcocks



Just one skiff, Nick Taylor.



In other news Nick has found an underloved BR RX and is giving it some loving till its sold. w00t! training partner.

Sunday, April 18, 2010

nsw states

great place to sail.



my boat didn't go upwind, just reached back and forth.
don't know how to fix it yet - should be obvious with more practise.



some advice from other people were:
- improve foil finish
- bin the foils and buy new ones
- don't use 40mm cams on 50mm
- wand too far offset from CL
- use more vang



a repair of the push rod rebroke during the 5th race with 3 to go. Nick and I managed to jury rig a tension system and so the boat was back on the water for the final day.



boat at the rock? i thought it was bigger.


Tuesday, April 13, 2010

Sucker for a Pretty Face

Bladerider RX used less than 10 times.
Excellent condition.
$15,000 asking price
Located in Brisbane

Anna.Patterson ( a t )
goodman.com

Thursday, March 25, 2010

Stress Less Refit

While Markla is well underway with boat handling and getting up to speed in his boat, I still don't have a boat of my own. I've been umming and aarring about the viable options; buy second-hand or rebuild an old boat with second-hand gear (already have access to a very narrow shell lying around). Ultimately I would love to buy a new boat and not worry about getting sticky fingers, but I just can't see the value in them for a relative newbie.

Decisions, decisions...

The bare hull shell that was stress less is sitting at Markla's parents place gathering dust and snakes. As part of determining whether it is feasible to rebuild it, I present an early rendering. Current thinking is to move towards socketed beams rather than what's shown. Maybe something similar to whisper but without the freestanding rig, a stump stepped mast perhaps. The stress less hull is very narrow but relatively light so I see no reason it can't be converted to a foiler. It will need some carbon reinforcing from mast to cb case though. The biggest problem is finding a place to do the refit.


Foils are also an issue. Markla has been investigating the design for a home-built set and we've got heaps of ideas for building them relatively easily. More on that later though.

Lots to think about...

Monday, March 22, 2010

Moth Tattoo

Who thinks markla should get a moth tattoo?
One or the other of these, or combined as shown would be good. I reckon on the shoulder blade would be best.

Wednesday, March 17, 2010

camber control

Heard Amac interview talking about how long it takes to trim sail in light weather conditions, i thought this might help.



Glue this device to your deck to provide 100mm throw on the middle control line with a total purchase of 24:1.



Everything is shown to scale.


Assuming vang of 16:1, 6:1 for down haul and 2:1 for outhaul so at 24:1 I am matching the current amount of purchase. With larger diameter rope with an easier pull the overall effort for skipper should be less.


Two features to make it easy to adjust:

  • Series of holes in lever, move the take off up the lever to increase the throw of a particualr system
  • Turnbuckle on each control line to set the zero point of each system.
I would imagine these two settings would be changed to suit the conditions or sail chosen.

To


It doesn't need to be a single module (could be split into cleat base and lever base) but this way the loads are contained within it rather than applying bending moments to the deck.


Grey is carbon, cream is 80kg foam.

Carbon is moulded from a bent sheet metal mould. Port and stbd halves moulded up, glued to foam and a bridging laminate links the two cleat bases.

I could almost imaging someone in a light weather race holding the mainsheet (blocked out) in his tiller hand and working this sail camber control upwind.

Saturday, February 27, 2010

Tsunami Warning!

This is not a drill.

After the earthquake in Chile, there is now a tsunami warning.

http://www.bom.gov.au/tsunami/

A little useless at this late hour, but might as well try to spread the word.

Starcraft II

http://www.wired.com/gamelife/2010/02/starcraft-ii-2/

looks like my mothing skills and sleep patterns may suffer in a few months.

Tuesday, February 16, 2010

elephant

new poll to address teh elephant in teh room...

Sunday, February 14, 2010

Walk of Shame

It was me 2 weeks ago and Markla this week. This time however, a bit more damage occurred after foiling into the shallows. The strut has cracked right down the leading edge and its torsional stiffness has pretty much gone, making it unmanageable in flight. Plans are afoot for repairing them.

Markla alleges he was in the channel at the time however the pure pwnage of the foil tells a different story. The approx location of teh catastrophe is below.



It was a long walk back to deep water.

Wednesday, February 10, 2010

follow up

follow up to this...

approx camera location

house boats started here

house boats ended here