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August 04, 2020, 11:29:17 am

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61
Cars & motorsport / Re: Electricity and Energy gen...
Last post by meharibear - July 26, 2020, 10:02:26 am
Thoughtful stuff on RCMF, not concerning R/C?  Who could have imagined it?  Seriously though, one issue with renewable energy which has always stuck in the back of my mind concerns wind power.  With some of the prevailing winds being caused by the rotation of the earth, is it possible that building sufficient wind farms would actually slow that rotation?  And, if it is, how much reduction would it take to have a serious effect of life on earth?  Finally, what effects might we see?
62
Cars & motorsport / Electricity and Energy generat...
Last post by FlyinBrian - July 26, 2020, 09:06:05 am
I have had an interest in Energy since I did my OU techie stuff. I try to follow the various technologies but it is hard to make sense of all the claims, hypes, and commercial posturing plus of course the hyperbole spouted by the Gov't.

I doubt I will be around to see the death of oil and gas although it seems there is a push to move away from using gas to electricity for domestic heating and HW. A friend has a new house and it does not have a gas supply. Healing and HW are by means of an air source heat pump and a limited backup using 'lectric. It averages £50 a month to run over the last two years, ohk its fairly small but I think that is very good.

A bit more to the point and in keeping with this thread, we will all need to be able to charge cars before long.

Where do you think the future is for Energy "production"
Solar has come a long way with Photo Voltaic cells (PVC) panels being c 20% efficient now compared to 2-3% when I had them installed in my old house in 2011.

We just need to be able to store what is generated and batteries are expensive and if not installed, maintained and handled proper they suffer from short life.

Wind farms - I have heard that they will never re-coup their costs and its only subsidies that make em viable.

Heat pumps, ground or air sourced? Ground source takes up a big area for piping so probably out of the running except for new builds and those with large properties and cash rserves (just as it ever was)

Energy Storage???
Lithium batteries are still being touted to store solar/wind produced electricity but - how about heat storage using water/ rocks / chemicals; heated with solar / wind then converted to electricity using existing technology.


Totally silly question.

Re: Ground source heat pumps
How much heat can be taken from the earth before we have some other form of climatic catastrophe or will the on going heating from the sun be enough to balance out, I understood the heat hitting the earth from the sun disappeared at night into then out of the atmosphere.

TBC




63
IC Engines / Re: ST 2000 Needle valve
Last post by itsme - July 24, 2020, 08:19:17 am
More than that- PDR is NOT wearing a mask!
64
IC Engines / Re: ST 2000 Needle valve
Last post by paulinfrance - July 24, 2020, 06:21:04 am
Quote from: FlyinBrian on July 24, 2020, 06:17:00 amI know where the DorDogne is just wondered if there was a similar sounding place that I did not know about - where is the evil grin smiley?

I see the spelling Police are out in force in the last couple of days,, it must be the Summer heat,, :-\
65
IC Engines / Re: ST 2000 Needle valve
Last post by FlyinBrian - July 24, 2020, 06:17:00 am
Quote from: paulinfrance on July 23, 2020, 15:25:20 pmI back flip my four strokes after doing the same till methanol comes out of the carb and back flip with a wooden spoon, "but" luckily Tuesday I held the prop on my old OS 80, I mixed up the ignition ( glow ) switch on the radio, as it hasn't flow for 2 years and it was 'live',, still got all of my fingers.

Yes I paid 46€ with the big cone, 3 in the club and 2 on 3s for 20/30cc petrol and one for a 55cc the third on the old 12v 7amp lead battery.

With my shoulders no way could I swing a prop on a petrol.

Ps, I fitted choke levers on all of mine.

PPs that's, Do*dogne,, it's where Brits go and buy a heap of rubble for £300.000 and drink themselves to death on red wine.

I know where the DorDogne is just wondered if there was a similar sounding place that I did not know about - where is the evil grin smiley?
66
IC Engines / Re: ST 2000 Needle valve
Last post by paulinfrance - July 24, 2020, 05:31:03 am
Quote from: NickK on July 23, 2020, 21:51:43 pmPs, I fitted choke leavers on all of mine.

What did you do for a choke then after that :ev  $%&

 oh dear,,,,
67
IC Engines / Re: ST 2000 Needle valve
Last post by NickK - July 23, 2020, 21:51:43 pm
Ps, I fitted choke leavers on all of mine.

What did you do for a choke then after that :ev  $%&
68
IC Engines / Re: ST 2000 Needle valve
Last post by JimG - July 23, 2020, 20:52:09 pm
The starter looks like one that is available from Morris Mini Motors. A friend has one and it works well although he has found that the standard starter insert is a bit large for smaller spinners.
I have the larger version to start my 90cc petrol radial which needs a lot of torque to turn over.

Jim
69
IC Engines / Re: ST 2000 Needle valve
Last post by itsme - July 23, 2020, 19:10:24 pm
Quote from: FlyinBrian on July 23, 2020, 12:04:40 pmItsme, What starter are you using please. Re prop, it had an 18 x 8 wood prop  which seems small???
I will be fitting a GF filled prop but do I stick with 18 x 8 or can it handle say 20 x 10 like my MVVS 40cc (on a tuned pipe)

Ta
Brian
When its run in, sure. I use a Just Engines 24 volt geared starter, on two gel cell 12 volt batteries wired together. I use a charger designed for mobility scooters. The starter is not perfect, it can weld the contacts together and you need to dismantle the switch to fix it. Happened to me once, others a couple of times. It will start almost anything. I am using an 18x8 Master Airscrew black glass filled plastic.
70
IC Engines / Re: ST 2000 Needle valve
Last post by paulinfrance - July 23, 2020, 15:25:20 pm
I back flip my four strokes after doing the same till methanol comes out of the carb and back flip with a wooden spoon, "but" luckily Tuesday I held the prop on my old OS 80, I mixed up the ignition ( glow ) switch on the radio, as it hasn't flow for 2 years and it was 'live',, still got all of my fingers.

Yes I paid 46€ with the big cone, 3 in the club and 2 on 3s for 20/30cc petrol and one for a 55cc the third on the old 12v 7amp lead battery.

With my shoulders no way could I swing a prop on a petrol.

Ps, I fitted choke levers on all of mine.

PPs that's, Do*dogne,, it's where Brits go and buy a heap of rubble for £300.000 and drink themselves to death on red wine.
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