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Messages - ajaffa1

Pages: 1 ... 93 94 [95] 96 97 ... 110
1411
General Discussion / Re: The future of electric Vehicles.
« on: May 31, 2018, 09:42:20 AM »
Hey Glort, for once I disagree with you. I think that for city dwellers EVs are the way forward, your average commuter/house wife does not need a vehicle that will be able to drive from Melbourne to Darwin, nor do city dwellers need to be breathing in the toxic emissions from IC engines. They need a simple small vehicle that will get them to work and back and to the supermarket. Perhaps vehicle hire companies can fill the void by hiring out longer range IC vehicles to people planning a long trip.
I still have very severe reservations about the ability of the grid system to power the city EVs, however the idea that generating capacity could be maintained after midnight to charge EVs might have some merit. Cycling generators up and down to meet demand is very inefficient, so having a heavy night time load may make economic sense.
Bob

1412
General Discussion / Re: The future of electric Vehicles.
« on: May 30, 2018, 11:57:21 PM »
Hey Glort, I stand corrected. Perhaps I have slightly too much faith in government and business, I will try to be more sceptical in future.
Here is an interesting take on how to roll out electric vehicles https://au.finance.yahoo.com/news/zipcar-plans-roll-electric-fleet-144740082.html

Bob

1413
General Discussion / Re: The future of electric Vehicles.
« on: May 30, 2018, 12:54:19 AM »
I think that finding an enlightened forward thinking government is about as likely as finding fairies at the bottom of the garden.
Much more likely that market forces and advertising will dictate the direction we go in.
Bob

1414
Hey Mike, There has been endless debate about which oil to use in slow speed diesel engines. I cannot see that adding a filter will do any harm and may do some good as long as it does not clog up and cause oil starvation. Some oil filter housings have a bypass valve to prevent this from happening.
I think a much greater cause of wear in any engine is cold starting when the lubricant is thick and does not flow easily. The huge mass of a Lister/Listeroid engine requires a long time to reach full operating temperature and condensation in the crankcase can also be a problem. I have wondered about building some sort of oil heater but it`s probably more trouble than it`s worth.

Bob

1415
General Discussion / Re: The future of electric Vehicles.
« on: May 30, 2018, 12:20:19 AM »
Hi Mike, I think that in any country with a surplus of renewable energy electric vehicles make perfect sense. Most people only us their personal transport to commute short distances to work, schools, shops & etc. so range is not a huge factor. Cost however is a big deal, why would anyone in their right mind pay a lot more money for a vehicle that won`t do what its predecessor did and will probably need a new battery pack in five years time?

Bob

1416
Changfa Engines / Re: Changfa for a 12000 Ib Sailboat.
« on: May 29, 2018, 11:52:23 PM »
Hi Ade, I think these guys also need a little health and safety training https://uk.news.yahoo.com/barbies-dream-car-gets-serious-001953939.html

1417
Changfa Engines / Re: Changfa for a 12000 Ib Sailboat.
« on: May 29, 2018, 11:15:54 PM »
Hey veggie, great videos showing some great ingenuity. I wonder how they check the oil level on an engine mounted at a thirty degree angle.
Bob

1418
I agree with 38ac, The Listard chrome was effective when originally used, nowadays with improvements in metallurgy and lubrication a steel or cast iron bore with hard rings should be reliable and have good longevity.
Which brings us back to the question of which oil to use and should it be filtered?

Bob

1419
Hey guys, I concur. I can buy a whole new cylinder casting for about one third of the price of repairing the original. There are different qualities of replacements available, as far as I know, no one is supplying a chrome plated cylinder block to the original specification. If anyone knows otherwise please let us know.

Bob

1420
Hey Bernhard, I`m in the same boat requiring a cylinder sleeving. There are two types of sleeve (wet and dry) the dry ones have a wall thickness of around 3mm and are pressed into place, with an interference fit of around 3 thou, before being machined top and bottom. Wet sleeves have a much thicker wall and involve machining the barrel out through to the water jacket. The sleeve is pressed into place and has o rings to maintain a water tight seal top and bottom. I believe that quite a lot of Indian clone engines now come with a wet liner which is relatively easy to replace.

You might want to check out Dieselspanner who did a very good restoration recently and showed a picture of a dry sleeve.

Good luck, keep us posted,
Bob








1421
Engines / Re: A Nice Story About A Lonely Engine
« on: May 26, 2018, 10:50:17 AM »
Who is this guy and what is his secret? He managed to strip and get that old engine running without getting his hands dirty! Hat off to him for a great video.

Bob

1422
Hi Arve, I had another look at your photos, the vital piece of information is on the plaque on the generator head where it says RPM 1500. I have no idea how they managed to get 240 volts out of it at only 1000rpm. I suspect that they may have wired across 2 legs of the three phase output. Do not mess with this unless you are competent, three phase will kill you as soon as look at you.

Another observation from the photos is that your unit is designed to have a ducted air system to vent hot air to atmosphere.
Without this it will very quickly become very hot in the generator room.

Bob.

1423
Hi Arve, the engine you have there is a Lister ST2 air cooled diesel. It should indeed normally run at 1500 RPM but it may have been throttled back to match the generator head. You say that it produces 240volts it would be helpful to know if that is at 50HZ .
My ST2 generator needs to run at 1500RPM to give me 240 volts at 50HZ. I believe that American units run at 1600RPM to give them 60HZ output. That said it could be that because it is a three phase generator it needs to be run slower.
The expert on these old generators is Lucien Nunes, you can find him on the stationary engine forum.

Good luck and please keep us posted.
Bob

1424
General Discussion / Re: The future of electric Vehicles.
« on: May 23, 2018, 09:10:54 AM »
Hey Glort, no shortage of evidence to suggest we are all being taken down a blind alley at enormous expense to consumers and industry. The problem is that half the world has signed up to carbon emissions targets that are unrealistic. I believe that as oil starts to run out and prices start to rise dramatically, other energy solutions will become economically viable and common place.

As for flying cars, heaven forbid! Most of the idiots that learned to drive on an X Box can`t manage to control a vehicle in two dimensions please don`t introduce a third.

Bob 

1425
General Discussion / Re: The future of electric Vehicles.
« on: May 23, 2018, 09:00:50 AM »
Interesting times and big challenges. I notice that the Australian government has ordered 20 Hyundai hydrogen fuel cell cars, for experimental purposes. There is presently only one hydrogen fuel pump in Australia so how they plan to fuel these vehicles is a mystery. I believe they have a range of around 800 km, so comparable with many gasoline vehicles. They can be refueled in about ten minutes which is bearable, plug in the fuel line, go get a coffee, pay and drive away.

I suspect that these vehicles will be very popular if people can generate hydrogen from solar and safely store it. I have reservations about home hydrogen storage in Australia due to the constant threat of bush fires. God help our firemen.

Bob

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