danny_galaga

"Rotax To End 582 UL Engine Production - AVweb" https://www.avweb.com/ownership/engines/rotax-to-end-582-ul-engine-production/

1 hour ago, spacesailor said:

Slightly wrong there !.

The first ' kit cars ' sold way above their build cost, Lotus kit on a old Ford body, far dearer than that old Ford would ever fetch !.

I had a ride in a kit " Ford two seater " that became, one of the world beatinf " Shelby Cobra V8 "muscle car.

spacesailor

Not to derail my own thread too much, but the Shelby Cobra was never a kit car. People make replica kits of the Shelby Cobra but that's a different thing.

Fantastic machine! I guess you'd have to be wary of setting things on fire though

17 hours ago, octave said:

 

So this is an untruth??????

 

 

I would imagine that this information would be available to shareholders and certainly it would be a serious matter if the Chief Executive is actively making misleading statements.   Rio Tinto is only one many mining companies investing in this technology.  It is not just one company but many both in Australia and overseas.   Mapping renewable energy projects at Australian mines

 

It may well be that since you worked in the industry technology has advanced.    When I installed my first rooftop solar back in 1990 a 60w panel cost $595.  Today  for $150 you can get a 350w panel.  Back in 1990 $595 was a lot of money

 

 

In an interview with RenewEconomy’s Energy Insiders podcast, Alinta Energy chief executive Jeff Dimery says the “rough payback of 4.5 years, which he says in an excellent payback for this type of asset.

 

One of the great fallacy of the current energy debate is that only wind and solar energy need “back up”. This is complete nonsense. The Newman power station has four different gas turbines, two of which usually have to be run all the time as spinning reserve just as back-up for the other one or two that may be required to generate electricity.

 

The presence of the battery means that spinning reserve is no longer required. Its speed of reaction and strength meant it could hold the grid together if the main turbine or turbine tripped, giving time for the other two to be fired up. This has significantly reduced outages at Roy hill.

“The whole role (of the battery) is to eliminate spinning reserve, so we are not burning gas in standby mode,” Dimery says. “The reliability of supply has increased dramatically on the back of that investment.

As well, all public listed companies have to have an independent accounting firm go over their books. 

1 hour ago, Geoff_H said:

Most of what you read about renewable resources on the internet is published by persons or companies with a agenda.  The greatest con is to quote MW not MWh.  Every now and then I do a sanity check on the figures few rarely give statements that are honest

Are you saying then that they don't make their cost back in 6 months n to two years or so? All the different people who need to check those figures, from economists to engineers to power companies to banks to insurance companies, all those thousands of people all doing their own due diligence, have got it wrong?

3 hours ago, Geoff_H said:

Please do.  I spent 2 years consulting to a very large mining company and we could not find any economic renewable energy system that was economic. Even though we had large sources of low grade heat.  I think they government subsidies can make it economic for households.  A consultant friend did many wind studies for mining companies using tall masts and data logging.  He told me that wind cost 4 times that of conventional power systems.

How big were the turbines? The big ones pay for themselves within 6 months to two years or so. That sounds pretty cost effective to me...

3 hours ago, spacesailor said:

WOULDN,T WE ALL ,.

How much for a dream ?.

spacesailor

I take it in good spirits, but if I was enjoying the build I wouldn't even consider selling. But I hate losing lots of money even more. Horrible situation to be in.

I go through periods of ennui with this build. Lack of time and money is really slowing it down. Feeling a bit better about it now. In fact, I think I might have a sore back on Wednesday 😉 and I can do a few circuits on the hire plane first thing and then continue the build.

But if I could get the right price for it, I would let it go...

8 hours ago, kgwilson said:

The first TVs were mechanical. CRT's are electronic.

Who made a colour tv (moving pictures) in 1884? If it's some mythical Tesla story, that can be discounted since people incorrectly assume everything he wrote about in later life he invented. 

Tv seems to be like flying-lots of people claim to have done it first. But only those who documented it fully can really make that claim.

2 hours ago, pmccarthy said:

Danny have you given up on the South African kit?

Just weighing up my options

On 24/06/2021 at 5:11 PM, kgwilson said:

The first colour TV was invented in 1884 & John Baird the Scottish electrical engineer credited for inventing TV demonstrated mechanical colour TV in 1928.

Interesting, since the first CRT was invented in 1897 😉

Has anyone here ever sold a partially built aircraft kit? How do you go about it?

Walrus. Best you cross your fingers then for continued improvements. Else make sure your diesel vehicles last a long time. But i'm pretty confident that in ten years time, range won't be an issue anymore for anyone.

One-track. In ten years time most people will be driving electric and charging from home. And actually, most people who own electric vehicles now charge from home. People, especially the younger generation will wonder why people would ever want to queue at a service station.

And for sure less people will be bothered owning a car. Self driving cars, while not really properly developed now, will almost certainly be a normal sight in ten years or so. Most people would probably rather just summon one via an app. 

11 minutes ago, kgwilson said:

Toyota have been slow from a public perspective in the EV space generally concentrating on hybrids but news is now out about their battery R&D that has been going on for some time. All they say is the new technology is solid state battery technology in partnership with Panasonic. Current range is 500km but the battery can be fully recharged in 10 minutes. That is almost as good as going to the servo now for petrol. The 1000 km range is being met as well but the battery size and weight needs to come down to make this more practical.

I don't think the 'Aussies need their utes and the weekend will be ruined' crowd will be happy even if you get 10,000 km range from one charge in one minute. Scomo and Allen Moans keep telling them it's the devil's work so that's that.

On 18/06/2021 at 12:30 PM, turboplanner said:

We're still awaiting the Mildura plant announced in the 1970s - much the same principle.

Maybe forget about the past. Construction on THIS project has already begun

19 hours ago, turboplanner said:

We're still awaiting the Mildura plant announced in the 1970s - much the same principle.

Maybe forget about the past. Construction on THIS project had already begun

39 minutes ago, facthunter said:

That's why you need storage of the cheapest power imaginable. Pumped hydro or Hydrogen etc. Both provide quick response. COAL certainly does not. New critical coal starts at about 55 cents:/Kw/ Hr. Nev

Have you seen this?

https://arena.gov.au/blog/raygen-solar-thermal-plant-to-be-built-in-victoria/

If successful will net 17 hours storage each day. Bloody brilliant idea.

I can't wait for Allen Moans, Andrew Dolt and Peta Cretin to tell us why it won't work...

5 hours ago, Flying Binghi said:

Yep, great things them electric aircraft/vehicles/bikes. I were once very keen on em, even got one of them 2 wheel stand up scooter thingys. 11’ Wheels, 2 motors and will do ninety so I’m told... But, electric motor transport do have its problems. I think it prudent to wait a while before getting too ‘invested’ in the game. Let the crash test dummies work out the faults first.

 

One thing I note when yer see vids on Tesla’s they always say just how simple the electric motors are compared to the ‘complex’ piston motors... except, them Tesla’s is not simple. One needs to consider the entire system requirements to get that Tesla to move. There is a lot of cooling plumbing, pump, and electrical connections involved in getting that Tesla to move and any one failure point of the thousands of connections can bring the plot undone.

 

Theres a lot of crap in the “Why Electric Planes are Inevitably Coming” video. And one claim is of simple servicing. I can just see the local aircraft engineer trying to annual or trouble shoot the battery pack with all its battery’s, soldered connections, wires, and cooling pipes... yeah, right..😏

 

At any rate the charging power for the aircraft will likely be coal. So a better name for the aircraft would be a coal powered aircraft..🙂

 

 

 

 

. 

 

Sigh, here we go again with the ' it'll  be powered by coal anyway' argument. Look to the future- do you think there will be more coal power, or less? It's a confusing statement too. If you are for renewable energy, you would be dismayed about the idea that seemingly all power generated in the future is from coal. If you love coal, then you should be happy that all electric vehicles will be exclusively powered by coal. In fact, you would lobby the government to make sure absolutely everything is electric powered so you can burn more of that lovely coal.

Excellent video! I even found the first five minutes interesting 🙂

I mentioned fuel injection. I've been chatting to a guy named Ray out at Boonah. He has been fitting a Rotec fuel injection system to his Jabiru. I don't believe it's fuel injection in the common electronic solenoid system we see on cars, but it's supposed to improve on the carb. Have you looked into that? You won't have to modify your engine, and as well as getting a few extra ponies, you should be using less fuel too.

https://www.rotecaerosport.com/tbi-34-s

It's it carb or fuel injection? Fuel injection will get you a gain without creating more heat

Yep, no one is probably EVER going to solve problems like that because there's no incentive now for new engine designs. There's no money in it, and there won't bE a sizable advantage over the extra cost of a limited run manufactured engine.

Innovation makes us human, but innovating in ICE technology now seems a little futile if for a business proposition. If people innovate for just as a hobby, then that's different. For instance, I'm a bit of a retro games nut. There are people still making games for the Commodore 64 and Atari 2600! Even cartridges. I have a few myself. Some of the games are using new techniques never used back in the day. But in the end it's still old tech. 

Just thought I'd update about the stall fix kit, for want of a better word. It is extremely comprehensive, not just a bag of vortex generators as was the speculation. The tailplane surfaces are all larger, and come pre covered. The trim tab is much more aerodynamic now, being a build up aluminium affair with appropriate thickness as opposed to just a flat metal plate. Trim Lever is also more substantial to allow for more movement. The rudder has an anti balance tab now as well. Vertical stab is a bit taller, and there is a small dorsal fin. There is also a very nice pitot tube to allow for more accurate airspeed readings. It also has a static tube as well, there wasn't one before. 

There are some aluminium fences for the ailerons.

There are also some fuselage brackets that need updating, I assume because of the different loadings caused by the new empennage.

Also all stickers that may need to be updated due to the changes. And a fuel filler kit so you can fill up from outside the aircraft.

Every single thing that needs to be replaced is in the kit, down to the last nut, lace and cable tie. 

The main design flaw of any of these new engine designs is the are forty or fifty years too late. There's really no point now.

They are seriously nice looking. Cool that is on ra Aus 😎