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Please play nicely.  No one wants to listen/read a keyboard warriors rants....

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Messages - Kevin Wood

33226
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But DO NOT put your rear foglights on at the slightest hint of anything other than bright sunlight. WHY DO YOU DO THAT???

Fog lights? Ahh, you mean the "I'm nervous" button with the little orange light on?

Kevin

33227
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I am constantly amazed by how many people in the UK can't drive in the rain.  The place is kinda famous for it after all!

Yep. The slightest deviation from ideal driving conditions and it becomes obvious that a significant proportion of drivers have no confidence. The result of a decade of preaching "speed kills, nothing else matters".

The state of our roads doesn't help, either. I passed two floods this morning where the locals were trying to clear out drainage gulleys to protect their property. Only council contractors I passed had parked a large truck on a dangerous bend, facing the oncoming traffic with main beams on, and appeared to be busy having a fag break. >:(

Kevin

33228
General Discussion Area / Re: That plane stopped quick
« on: 17 January 2008, 17:10:13 »
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Sounded like due to loss of power that it eventually stalled and dropped.

That figures. Guess he was trying to stretch the glide and didn't quite make it. That explains why the undercarriage didn't just collapse but went through the wing.  :o I guess it hit the ground with a fair bit of vertical speed!

Still, could have been worse. A couple of knots less and it'd have crashed outside the airport boundary.

Worrying that a twin can lose both engines and all avionics at once though :o Guess there'll be some questions asked about that one!

Kinda makes me wonder if he got his fuel calculations right. :o


Kevin

33229
General Discussion Area / Re: That plane stopped quick
« on: 17 January 2008, 14:50:20 »
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I'm not pilot, but that plane from impact to standstill doesn't look far.

The lack of any undercarriage makes for a very effective braking system, as one of my glider syndicate partners demonstrated a couple of years ago, much to my annoyance. >:(

The fuselage belly tends to wear a bit quicker than the brake pads though.  :-/

Kevin



33230
General Discussion Area / Re: Im looking for a new car.....
« on: 17 January 2008, 17:25:33 »
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hammering on loads of miles by commuting soon scuppers that idea

Very true. After all, let's say your commute costs you 2K a year in petrol in the Omega. Another couple of hundred on tyres, etc. etc. (which would be true in any car).

Go and spend 10K on a car and put that mileage on it and it'll cost you another 2K in depreciation.

Kevin

33231
General Discussion Area / Re: Im looking for a new car.....
« on: 17 January 2008, 17:15:23 »
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As well as more expensive fuel, you have more expensive servicing

.. and on a car at 10K plus value, that you may be moving on in 3 years or less, I'd be inclined to keep the service history up to date, which means no more popping out for some Semi synth with the TC card.

An Omega is depreciating fast enough that you don't lose out by servicing it yourself.

Kevin

33232
General Discussion Area / Re: Im looking for a new car.....
« on: 17 January 2008, 16:59:02 »
Hmm. I reckon a late Omega is your best bet (then again, I would, because it's a decision I fairly recently made myself). You could get one of the last tidy ones for well inside that budget, whereas it'll only get you a fairly rough beemer at the top end of the budget. Why pay double what you have to AND suffer the shame of having "that badge" on the bonnet? ;D

Whilst the latest large diesels are much improved, their prices are holding up strongly, those that give decent performance also have a fair thirst, IME, and with the price of diesel being higher in the first place they don't do that much more than to make up the difference IMO.

If it's going to be a small, gutless runabout a diesel is a no-brainer. If it's going to be more of a barge, get a dual fuel.

Kevin

33233
General Discussion Area / Re: Constructive Day
« on: 17 January 2008, 16:18:37 »
IIRC, alternator bearings are available separately if you want to rebuild it. Look in the Maintenance Guides.  :y

Kevin

33234
General Discussion Area / Re: M_DTM/Jimbob
« on: 17 January 2008, 12:48:49 »
You need to make sure your rear subframe is strong enough, shifting weight like that.

There's a very strong one in my back garden. Free to good home, buyer collects :P

Originally from a Granada but bound to fit in an Omega.

Kevin

33235
General Discussion Area / Re: Watchdog
« on: 16 January 2008, 22:01:10 »
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A lot of drivers in Liverpool carry a brick.........and a bat.......and a gun.......

So, park up, idiot the handbrake with the bat a few times to make sure it's holding, place brick behind wheel and if it still rolls off, shoot the tyres out :y

Kevin

33236
General Discussion Area / Re: Watchdog
« on: 16 January 2008, 20:44:42 »
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Is it due to the ratchet mechanism then?

I thought it was the age old problem of handbrakes operating disk brake calipers. Park up with red hot disk and it loosens as it cools. Then again I doubt Corsas have disks all round :-/.

It's a pretty dodgy ratchet mechanism if that's what's giving way. Surely VX have learnt how to make one that works after all this time?

Kevin

Vx wont admit anything but are going to recall all vectras/signums to fit 'a spring'  ;D


A pair of chocks in the boot, more like. ;D

Kevin

33237
General Discussion Area / Re: Watchdog
« on: 16 January 2008, 20:07:15 »
Is it due to the ratchet mechanism then?

I thought it was the age old problem of handbrakes operating disk brake calipers. Park up with red hot disk and it loosens as it cools. Then again I doubt Corsas have disks all round :-/.

It's a pretty dodgy ratchet mechanism if that's what's giving way. Surely VX have learnt how to make one that works after all this time?

Kevin

33238
General Discussion Area / Re: Camshaft and Crankshaft Sensors
« on: 15 January 2008, 20:04:17 »
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The cam sensor on the 4 pot is actualy unusual as it has a sine wave of some few hundred KHz applied to it!

I've noticed this. Is it still a variable reluctance sensor or some other type?

I'm guessing this is done to improve the low frequency reponse of the sensor over one with a "DC" magnet.

Kevin

33239
General Discussion Area / Re: Camshaft and Crankshaft Sensors
« on: 15 January 2008, 16:38:26 »
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Therefore, I assume that, when pistons 1 and 4 are at the top, one of them is compressing the fuel air mixture for combustion and one of them is releasing the exaust gasses?

Yes, and to determine which is which, you need to look at the position of the camshaft.

On one cylinder, in this position, both valves will be shut as it prepares to fire. On the other cylinder, the exhaust valve will be closing and the inlet valve will be opening as you're at the end of the exhaust stroke and the beginning of the next induction stroke.

If you think about the distributor, it's driven by the camshaft, so it "knows" which cylinder will fire next. If the ECU doesn't have a cam sensor, it doesn't, and this is how wasted spark systems work. They don't need to know.

Put a cam sensor on, and the ECU has all the information that is available to a distributor, so it can inject fuel to whichever cylinder has its' inlet valve open, instead of injecting onto an closed inlet valve on some of the cylinders. It can also control an individual spark to that cylinder instead of a spark to both cylinders in the pair.

The main timing reference is always taken from the crankshaft, however, because the cam shaft is connected to it through a belt or chain which has a little bit (a few degrees) of slop. This is a big advantage over having the timing reference from a distributor. Timing can be controlled much more accurately with a crank sensor.

Kevin

33240
General Discussion Area / Re: Camshaft and Crankshaft Sensors
« on: 15 January 2008, 14:40:30 »
Two spark plugs fire at once, but only one of the cylinders they're in contains any fuel.

So, the cylinders do indeed still fire one after the other. It's just that pistons 1 and 4 and 2 and 3 on a 4 pot are always at the same point in the bore, so their top dead centre timing is the same, and required spark timing is at the same crank angle. Each one only fires every 2nd rotation of the crank though so they take it in turns to actually "use" the spark.

Kevin

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