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Topics - mikenash

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1
Generators / What do knowledgeable folks think?
« on: April 14, 2020, 11:16:43 PM »
https://www.trademe.co.nz/a.aspx?id=2597330893&tm=email&et=47&mt=3CD2EA5F-6EC8-4299-AE88-E417DDE97A03

Hi guys

I wonder what folks know about/think of this unit?  The diesel looks to my untrained eye to be a bit like some of the ones you guys have talked about here

It's an open-drive unit, so the gen-head could be re-purposed if the price was right, I imagine

Looking at the 32A outlet and the three 10A breakers maybe at a 50% duty it's 2kVA-ish three phase (if it has 10A breakers then maybe it runs at, say, 5A: (5A X 400V = 2000W) ? Or twice that at 100%?  I'm just thinking what "starting current"-type peak load it would need that it has a 32A outlet as opposed to a 16A one?

Of course my diagnostic skills in this area are crap - and the photos aren't that easy to read eaither

I look forward to being informed/put right/enlightened

Thanks

2
Waste Motor Oil / Okey-dokey. Trying to burn waste oil
« on: April 06, 2020, 10:01:09 AM »
I need to give kudos to a bloke called Ozzirt (I think he might be Irish) as permutations of his drip-feed, no-fan, no visible emissions, no smoke inside burners are all over the world and all over YouTube

Principle is simple, as stated.  If you have a bit of steel/iron/metal that's close to red-hot and if you drip oil onto it - then the oil will vapourise.  If you have a flame there and a just-right draft, the oil fumes will burn like bloody wildfire - and burn hot and clean by the look of things

The secret to it seems to be creating a good draft - using a long flue, basically - and using that draft to suck controlled amounts of air into the thing so that there's a good fire keeping the drip-plate-thingie hot, and a bunch of secondary-burn air-holes at strategic spots to get a raging column of burning oil fumes heating up a big metal something on their way to the flue.  The big metal something - the "stove" bit  (designs vary from a bit of heavy pipe to 100-litre compressed-air receivers - and everything in between)  radiates heat into whatever area.

Temperatures seem to be in the range of 900-1000 degrees F at the top of the burner pot area and maybe 400-700 F at various parts of the big heat-radiating "stove" bit

There are as many design schools as there are builders, and different versions of secondary air feeds abound - but there's a lot of overlap

So over the recent couple of weeks while my perk-disliking boss has been "working from home" I have come into the shop at six every morning and gotten in 90 mins work building myself one of these before anyone else turns up

The Domestic Authority isn't keen to be tripping over big bits of pipe shit in the garage  (and who can blame her) so the bits are sitting on a pallet out in the paddock in the traditional "under the Macrocapa Trees" site

Because they're out in the weather I gave them a coat of zinc primer and a coat of black enamel (which will burn off and stink/smoke like buggery hen it's fired).  I wish I had photographed it before painting - but too late now.  The black makes it hard to see detail

Anyway - pics attached

Main features are:

Body ex 250mm NB pipe with 8mm wall and 12mm top plate and 6mm wall 125mm swept elbow bend to flue cos there was one in the workdhop.  Crude baffles in the body to hopefully extract some heat before it goes up the flue

At the junction of the top of the burner tube/bottom of the body, there's an up-angled 40mm air intake with a section of 40mm pipe and a brass gate valve (the 600mm of pipe is just to keep the gate valve away from the hot stuff) so I can have a tinker with a tertiary air intake if it's good or just plug it with a 40mm BSP bung if it ain't

There's a funny stub-and-flange sticking out the other side.  That's cos I need to mount it out in the paddock miles from anything flammable and I have a post with a suitable flange for that to mate to in a suitable location.  So it'll be kinda "free-standing" so as to be easy to muck about with

Hanging below the body is a section of 100mm SC40 steel pipe with a bunch of holes (secondary burn section).  I figure I may have to drill more holes but I figured drilling extra ones later was easier (out int he paddock) than welding up surplus ones later.  On the bottom of that there's a flange where the burn chamber/pot bolts to the underside of it - just 4 X M16 bolts atm cos I don't want to do one of the many quick-release designs in the development stages in case it self-releases and sprays burning shit everywhere

On the top of that flange there are welded 3 X 15mm sockets (temporarily blocked with 3 X 15mm steel bungs so I can have one, two or three primary air holes

There's a bunch of 15mm/20mm plumbing to facilitate dripping one or two sources of oil into the pot (I don't like the copper-pipe-flapping-around look) an I have valving and plumbing etc "ready to roll"

It's a prototype.  I guess it owes me 10/15 hours and zero $$

Hopefully I'll get to do some burns with it in the next few months - firstly to validate/disprove/fine-tune the design; secondly to have a play with the heavy oil of which I have a potentially almost limitless supply

We'll see what happens.  As always, there is much to learn

3
Waste Motor Oil / Drip-feed waste-oil burner hopefully
« on: April 06, 2020, 09:21:38 AM »
I talked a little the other day about waste-oil and a burner

Coming up in a few minutes is a wee blurb and some pics

Lots of you guys know a bit about this sort of stuff - so I figure there's plenty to learn

But first:  a year or two ago I rambled on about building a heavy steel woodstove in my shed/workshop/house/whatever it is

My boss had a big Safety-in-Employment drive and threw all my perks out of the workshop (I am much safer now, thanks) so it got carted up to the Bay of Plenty and installed without some of the internal baffling.  "One Day"

Despite that it runs fine and it's very satisfying to sit in front of of an evening digesting dinner cooked on the top of it and listening to the fire muttering to itself and the kettle hissing quietly just "off the boil" in the cooler corner away from the flue

Just thought I'd attach a pic of that one.  It's not "signed off" yet because there is still internal work to do - but it's producing heat and very hot water in the cylinder & cooking my dinner.  So that's almost a "win"

4
Waste Motor Oil / filtration by "settling out"
« on: March 28, 2020, 04:19:18 AM »
Here at work we generate several tonnes of waste oil each year.  This year I would like to harvest some of it

One of these days I'd like to have an oil-burning drip-feed heater (and yes, I think I'm cogniscent of the pitfalls/problems around how temp changes viscosity, how they can't be left to run unattended etc etc) because I think my circumstances will suit one AND I have, potentially, a LOT of oil

I made a prototype a while back and have just about finished building Mk11 at work with some options to control primary, secondary & tertiary air intakes - hope to do some trial burns when this Covid shit is over and life can resume

So today at work I welded in a 40mm BSP socket to the side of an empty 44-gallon (200 litre) drum about 150mm (six inches) above the bottom.  I'll use the air-pump oil-transfer thingie to fill it up next week at work

What I reckon/hope/wonder is this:

My observation is that the oil is pretty non-hygroscopic.  When I drain gearboxes first you get a stream of clear water, then a stream of clean oil.  You don't get any white stuff

So I'm hoping that if it sits in a drum for a few years, that any water and whatever "dirt" is in there (no combustion by-products are present) will simply "settle out" and if I write off the bottom six inches by just draining it down to the new bung on the side - I might end up with quite a "clean" product

It has been bothering me for years that we just throw this stuff away by giving it to the recyclers.  It seems to me it's potentially a resource I should be harvesting.  There's probably nothing to stop me welding a socket in a heap of drums and harvesting a tonne or two

I'd be interested in any thoughts from folks who are experienced in dealing with "waste" oils

Cheers

5
Original Lister Cs Engines / Big funny piston rings
« on: March 28, 2020, 03:53:21 AM »
Hi guys

Our local machinist just failed Common Sense 101 (or at least his worker did)

I bought a 5slash6/1 recently with a long history of hard work on the farm.  Bottom end started out as a 3/1 maybe in the late '30s . . .

When I tore it down it turned out to have a +40 thou alloy piston (kinda an 8/1 now i guess) and the top ring groove was pretty worn.  I managed to buy some ring groove spacers in a suitable size as the 4&1/2 inch piston size was common in Bedford trucks & some other a half-century ago

So I calculated the clearance etc for the ring+spacer, WROTE IT ON THE PISTON WITH A PICTURE and gave it to the machinist we use at work.  He as been bloody good up until now

For whatever reason, he left it to a worker to do who mistook the vertical dimension for a lateral dimension and machined what could only be called A Very Big Groove into the piston

By the time I got it back it was one of those "what's done is done" situations

His solution was to accept that the piston now has a very big ring groove and to get a Very Big Ring machined by a bloke who makes one-off piston rings . . .

See pics?

What do you guys reckon the implications are?  I'd be interested to hear from some experienced folks

Cheers

6
Original Lister Cs Engines / waddya reckon?
« on: February 14, 2020, 07:38:58 AM »
https://www.trademe.co.nz/Browse/Listing.aspx?id=2532087845

There might be some life left in the oily one?

7
General Discussion / Welders
« on: October 22, 2019, 07:13:38 AM »
Hey Bruce (and others)

We talked about home welders & related stuff a while back - probably in the context of "what machine do I need?"  So maybe there is some value in the following thoughts:

See pics?

This is the little single-phase welder I use all the time out of my service truck running off the generator you see in the pic (see detail, nominally a 7500W machine).  This welder likes the generator and runs just fine off it

One of our suppliers has a slightly different variant of the 16TC 7016 Low Hydrogen electrodes I normally use for everything and I bought a box to have a play and did a rough test-piece (see pic detail)

Tomorrow when its cool I'll cut some slices off it and attack them with the press and the sledge-hammer so see if there are any faults

The test piece is an inch thick and used about 3 or four pounds of electrodes (to use American dimensions) and the little welder did a close-to-100% duty cycle - just the time taken to swap electrodes and chip/wire brush as it's only down-time - running at about 60/70% of its nominal 170A capacity

The point I wanted to make is that, while current ratings are a bit nominal, I started off the first ten or fifteen runs at 125A and the final five or six at 100A as the piece got hot and I was working closer to the surface

I'm a fan of these inexpensive (but not "cheap") Chinese-sourced, Australian-branded welders and the inexpensive (and only slightly cheap) Chinese Honda Clone generators

I'm expecting that if there are any faults in that test-piece they'll just be the result of a pretty causal approach on my part but that penetration etc will be good

FWIW I would conclude that - unless you're working on Serious Heavy Machinery - that a nominal 7500W (Chinese watts with a lot less torque than American/English/Lister watts) and a nominal 150A or so of welding capacity is plenty for most applications

Maybe the DC output is 30 or 35V?  On that basis, say, 150A is kinda 5000watts?  Whatever the arc-striking current draw is at 125A, it seems to be well within the range of the nominal 7500W Chinese generator

Cheers

8
Generators / uni-lectric
« on: October 19, 2019, 02:28:50 AM »
https://www.trademe.co.nz/a.aspx?id=2362208006&member_hash=a3a7566550fad4bdc4224f94f4401662016de7c29f5cc5555c&tm=email&et=46&mt=3CD2EA5F-6EC8-4299-AE88-E417DDE97A03

Check out this little beauty

It looks as if it has been somebody's baby

Maybe a liquid-cooled single with a hopper above?  Looks kinda two-stroke-ish in the cylinder area

9
Original Lister Cs Engines / Lost 38AC stuff on Camshaft Understanding
« on: September 12, 2019, 08:39:21 AM »

Okey-dokey

When I bought a CS a while ago in which the cam turned out to have been installed 90 degrees out of whack - several folk here gave me good practical advice, for which I continue to be very grateful

In the course of gaining an understanding I cut-and-pasted all the dialogue back-and-forth from Butch' thread on Camshaft Understanding and saved it as a word doc.  Then I deleted all the redundancies, re-quoted bits, random anecdotes etc (an illuminating process as 90% of the text contributed nothing except to show that we humans are the sort of animal that enjoys communication  QED, I think)

I attach the doc here

Ade - is it OK to do this?  It's not violating the spirit of whatever Butch was wanting to do when he removed his texts?  If it is - please just delete

I'll be surprised if others haven't done similar with other thread stuff

Cheers

10
Everything else / Welder
« on: August 24, 2019, 11:32:14 AM »
I wonder if anyone has built a welder powered by a CS or similar using a Lincoln Tractapak or Hummel or PTO-drive welder unit?

I dunno if 6HP would cut it - but these old girls have a surprising amount of torque and might manage, say, 150A?

I'd be interested in any thoughts.  Cheers

11
Changfa Engines / China diesel
« on: August 11, 2019, 06:52:40 PM »

12
General Discussion / Speaking of Tesla - the electric plane
« on: August 08, 2019, 09:55:53 AM »
It's the Jetsons

Check it out:

https://www.youtube.com/watch?v=vgdj9HpdzvI

I guess it's a bit of a toy in some ways (a piper cub will go three times as far on a tank of gas

But this little plane is travelling at 100MPH, is good for about 90-100 miles on a charge, cruises at 100MPH using just 20kW to do so

The plane cost $140K.  But the 100-mile flight used $5 of electricity (and yes, you could easily charge it with solar)

Some sort of a "shape of things to come" ?

13
General Discussion / Tesla
« on: August 05, 2019, 07:24:07 PM »
Hey Glort I thought you might be interested in this as an example of ownership costs for one of these

https://www.youtube.com/watch?v=rhbD44jXffY

14
General Discussion / one for the knockers and sneerers
« on: August 03, 2019, 07:00:33 PM »
Back in 2007 I was fortunate enough to spend a week at the Isle of Man TT

It was my 50th birthday present to my motorcycle-enthusiast self.  It was also the 100th running of the famous event - so it was a big party.  Back then my then GF and I were both freelance writer/photographers for various motor/motorcycle publications so it was a rare opportunity to see, photograph and write about something special

The racing was as spectacular as you might imagine.  It was the first year riders cracked the 130MPH lap average speed, and the weather was fine

But my favourite memory is the old guys from Honda who had come back 40 or50 years later with their old race bikes and their memories.

Almost without exception their stories went something like this:

When we first began to build motorcycles the British laughed at us and said "Let then make and sell little toy bikes; what do we care?"

Then, ten years later when we first arrived to compete at the Isle of man - they looked at our small motorcycles and sneered and laughed

When we got out onto the track and began to win races - the laughter stopped . . .

"This year (2007)" one of them said "you will not find a race here at the IOM - apart from specialist ones - where all three bikes on the podium are not Japanese"

Small beginnings . . .

OK so, see below.  This is a beginning and (like some of the early Japanese motorcycles) by God it's an ugly duckling of a car.  BUT, IMHO, I think it might be a sign of things to come

https://www.youtube.com/watch?v=bSbWwn_YCr8

And, at the complete other end of the scale, hands up anyone who is familiar with the Goodwood Festival of Speed sprint?.. It's a BIG fish in a small pond

This year, an electric car knocked a couple of seconds (significant in a sub-40 second sprint event) off the record set 20 years ago by a McLaren F1 car which no-one (despite million-dollar attempts) had managed to ever beat

Check it out.  it won't take long to watch lol

And it's a VW - which says something about where the company is going.  Same car smashed the Pikes Peak hillclimb record last year and beat the previous electric car record at the Nurburgring this year in a time that's less than a minutes slower than the current outright record-holder, its cousin the Porsche hybrid

https://www.youtube.com/watch?v=FkLMzJN6vMA

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