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Messages - dieselspanner

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31
Engines / Re: LPW 3
« on: April 26, 2019, 12:36:03 PM »
Hi Quince

I like the set up, the lack of a gearbox is good with the belt drive takes out all the alignment problem. I've worked with VP props - and Kitchener gear - and believe that, properly maintained they are as reliable as a gearbox.

You could get away with fixed rpm, imho, but I agree with most of the reasons above for having a throttle, and also that warming up on tick over or leaving the engine running to heat domestic water / charge the service batteries would be far more comfortable.

An outfit I've worked for before had a V8 GMC in a work boat, it was reputed to have come out of a small tank and went from tick over to flat out with very little adjustment in between, consequently it was hard on gearboxes when shifting from ahead to astern, something a work boat does a lot of...

With the revs fixed you may find the same wear issues on the VP prop. If you could link the pitch control to the throttle to drop the revs as you passed thro' the neutral point it would save all sorts of wear on the thrust bearings etc. and give you a smoother input of power to the prop.

It's not an engine I'm familiar with, doubtless others here will help, but given the numbers of the LP motors out there I don't think there would be too much difficulty with the throttle and I'd hope that a variable speed governor would be an easy swap.

Looks like an interesting project, keep posting as it develops!

Cheers
Stef

32
Original Lister Cs Engines / Re: stratomatic 6-1 power hertz
« on: April 24, 2019, 09:52:51 PM »
Nice one Butch,

I'm pretty sure in the past, you've pointed out to me the value of keeping it simple. I worked it from first principles, I guess i shouldn't have stopped there.

Cheers
Stef

33
Original Lister Cs Engines / Re: stratomatic 6-1 power hertz
« on: April 24, 2019, 09:45:11 AM »
Unless I'm mistaken you are looking for a 20% increase in speed, measure the circumference of the driven pulley, divide the result by 5 then multiply by 4, then divide that by 3.142 and that's the new circumference

I.E.   Circumference = 200mm * 5 = 40, x 4 = 160 * 3.142 = 51mm

Once you are in the ball park fiddle with the revs

Make sure that machining the driven pulley does not overly weaken it.

If I'm wrong with the maths, someone please feel free to correct me!

Cheers
Stef

34
Everything else / Re: Stripped threads repair help needed
« on: April 20, 2019, 09:26:31 AM »
I'm with Bruce for a quick fix,

If for example it's a 10mm thread, run an fettle it up with a file and run 8mm die / die nut down it far enough to get a full nut on then pack the rest out with washers.

If you want to get it out, weld a nut to the stud the whilst it's still warm, hammer it like a nail, without bending it, and as it cools 'rock' it both ways whilst applying you favourite penetrating fluid..

Should it snap, drill the stud out oversize, tap the hole and make a hermaphrodite stud - 12mm one end and 8mm the other, if you haven't got the new hole quite central make the stud offset and fit it with a good dollop of Loctite

Finally as my avatar says, run the nut down as far as you can and then weld it to the stud and leave 'til next time.........

I know the answers are 'cringe worthy' in the eyes of a lot of guys but if you're working with limited time / kit / money ect. then bush engineering is better, by far, than waiting for Fedex

Cheers
Stef

35
Petteroids / Re: PETTER - PAZ1 - New project
« on: April 15, 2019, 11:46:48 AM »
I don't know if it will help, but you could try using 5% ATF (car steering fluid) in acetone as a penetrating fluid. I think I read about it on here.

Keep putting plenty on, load the 20 tonne jack up as much as you dare, and then pack ice around the shaft. keep hitting it with a hammer (not to hard, don't damage anything) as well.

Cheers
Stef

36
Petteroids / Re: PETTER - PAZ1 - New project
« on: April 14, 2019, 02:12:31 PM »
That's how I got the flywheels off my CS, only I used chain rather than studding.

I'ts amazing what you can do with a cat, if you don't have a dog.....

Cheers
Stef

37
Everything else / Re: Solar water heaters.
« on: April 12, 2019, 08:54:15 AM »
I Like the bucket plan, Mike,

I was going to just put the pipe in and do it eventually, but seeing as I've almost got all the kit here spending 20 quid or so on the heating element seems like a better plan. we have a pressure reducer on the incoming cold water, down ro around 3 bar, bypassing that should give me enough head to perform a meaningful experiment, just need to  organise some shed time - maybe organise the shed too!

Cheers
Stef 

38
Everything else / Re: Solar water heaters.
« on: April 11, 2019, 08:51:04 AM »
Thanks for that guys,

I read up more on RMS and now have a bit of a clue as to what it all means, gotta love the university of Google!

No Money and little power is where I'm -slowly - going with the barn up the hill.

After almost a year I'm getting closer to buying it, the outfit that controls the refurbishment of ancient barns have given me permission for the conversion but the local council won't give me the go ahead 'cos the first lot put a caveat on the permission to the effect that I cannot remove any soil to construct the track.

This is a bit of a sticking point as the last 40 meters goes up at about 1 in 4, and the only way to get a track suitable for vehicles is to put in a hairpin bend. Big digger and loads of soil movement!

So yesterday I went back to our 'county town', Tarbes, and got the name of the boss who, naturally, wasn't there. At least I got to speak to an underling, who was very nice but totally non committal, and came away with an email address to try and get an appointment. Amazingly my French held up pretty well, tho having a partner who is extremely fluent helps......

Although I've shaken hands on the deal I've said I won't finally commit until all the permissions have been granted and refusing to pay an architect 6500 has cost me time rather than money, with a bit of luck another 5 months should do it!.

In the meantime I've been keeping an eye on the stream and it seems to be fairly constant, even in the dry spells, so the mini hydro plant is still looking favorite.

I'm leaning heavily in the direction of driving a 24v truck alternator with a pelton wheel, running it straight into a pair of 120 ah 12v truck batteries and out through a 6000x inverter. The idea being everything is plug and play, relatively cheap and easy to install. It's also very familiar to me as it's essentially the same as the system I had on my Dutch barge.

I don't know if it has any merit, but I'm also thinking of installing a second loop of under floor heating pipe alongside one driven by the wood burner. The - vague - plan is to power it with the output of the alternator in the early morning dark hours, once the batteries are topped up. Nothing complicated, just a timer, circ. pump, 24v immersion element and a temperature controlled switch to cut out the element if the pump packs up and / or it all gets too hot.

I got the idea from Glorts ponderings on 'what to do with excess solar power'

Bit of a long post for me, you won't believe how crap my typing skills are, I'm killing an hour whilst waiting to set off with a mate's truck for the French vehicle control test!!

Cheers
Stef


39
Everything else / Re: Solar water heaters.
« on: April 09, 2019, 08:54:15 PM »
Hi Bruce

Thanks for taking 2 minuets of you life to explain to Mike that you can run an immersion heater on DC.

I've just used up 4 minuets of mine reading about RMS, the Wikipedia page had some great Greek symbols, gotta love that sigma....

If it was down to me I'd run my solar power into a small 12v battery bank through a solar charge controller, with a low voltage cut out feeding the  inverter supplying the immersion heater, this I think I understand!

A. Would it work?

B. Is the gain, from a 100w panel for example, enough to make the system worth while? 

C. Am I just being lazy and trying to avoid complicated formulas and a bit of soldering?

Cheers Stef

40
General Discussion / Re: Earth Hour
« on: April 03, 2019, 09:35:50 PM »
As Winston Churchill is reputed to have said,

 'Democracy is the worst form of government, except for all the others'

Cheers
Stef

41
General Discussion / Re: Brexit
« on: April 02, 2019, 10:37:55 PM »
I'm pretty apolitical, I don't vote for anything, I have an opinion, but I don't moan about the state of the country (France or UK, or anywhere else for that matter) 'cos i didn't participate in the relevant election process.

However, looking at Brexit and the posts on here about Big Business, and way it controls our lives I don't think, in the case of Brexit, we have much to worry about. The UK is so close, geographically, to Europe that the financial and trade links will be impossible to sever. After all the German car industry is not going to build vehicles to a 'UK' spec any more than Maclaren will manufacture cars that are not EU compliant. EDF (the French national power company) will still be flogging it's excess nuclear power to the UK. Multiply that by everything else that crosses the English Channel, in either direction, and whatever the 'Sheeple' or the politicians are trying to do will soon fade into insignificance.

The rich will set it off against tax, the lower classes won't notice unless there's a drop in their social payments and the middle classes ( that's most of us on here) will be too busy trying to keep our heads above water making ends meet whilst paying inordinate taxes to finance the the 'Gubberment' that screwed the whole thing up in the name of political ambition. 

The worst case scenario is that those who live in the UK will have to get pay to get visas to go on holiday in Europe, and as that'll be mostly the middle classes they'll be screwed again, I'm staying in the Pyrenees - on the French side - 'till they throw me out.

Cheers
Stef

PS - Thanks Glort for the words Sheeple and Gubberment!



 

42
Reversing the engine was common on earlier marine diesel engines with the propellor shaft permanently coupled to the crank shaft. the engine was stopped, the cam shaft was moved to the other set of cams, by sliding it back and forth in its bearings and the engine restarted with compressed air.

A mate of mine started work on small coasters around the UK in the early '60's and this arrangement was common. As they were hard worked and under maintained old ladies the supply of air was limited by the ancient compressor's ability to keep up with the demand, so the skipper had to use the minimum of helm orders to maneuver in harbour, with each order, ahead, astern and stop requiring a restart.

See this link for details of reversing the Villiers motors in the Bond mini car

 https://en.wikipedia.org/wiki/Bond_Minicar

It doesn't mention it, but from memory, I believe they had a second set of points as well.

Cheers
Stef


43
Other Slow Speed Diesels / Re: Southern Cross ETB diesel engine
« on: March 23, 2019, 07:35:40 AM »
Hi Bob

If the engine will run on without repairing the piston I'd be inclined to leave it alone.

Whilst there's every chance the repair will hold, if it does detach it's self (incompatibility of metals, thermal shock and stuff like that) a chunk of metal flying around the upper cylinder is going to play the cat and banjo with the valves and bore.

'swot I fink, anyway......

Cheers
Stef

45
General Discussion / Re: Smoke billowing out of intake.
« on: March 22, 2019, 05:07:23 PM »
The short answer is probably 'timing'

the longer one is that when it hit the compression stroke it bounced back just after the injector popped, when it went all the way around, almost two revolutions to the compression stroke from the other side it fired, passed TDC and continued to run.

The injector would have popped, albeit in the wrong position and the sequence repeated it's self.

Without a lot of thought, for which I don't have time, 'cos I'm off up the pub in a few minuets, there's probably less charge air when the motor runs backwards, leading to an overfueling situation, hence the black smoke.

Check the timing, and if that's ok crank harder to get it past TDC in the correct direction!

Cheers
Stef

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