Jonathan Kay

:-) Full search of the archives. Jonathan

Have you got Regin's notes? Jonathan

I am sure Im not the only person with this issue on early cars, so I will keep trying. You're certainly not. On my 1998 Seven I use a combination of not going all the way in, funny angles and a low flow rate. I'd guess that's the most common approach. The next step for me would be: ... a short length of flexible plastic tube from a fuel filler can to insert far enough to open the flap. Jonathan

Thanks Jonathan

The other thing to consider is both the FAA and EASA have mandated the use of waterless coolants for fluid cooled aircraft engines this is done for a separate reason ie operating temps being higher than coolants can cope with, but the flammability aspect would be taken into consideration. I'm only aware of notices that apply to some specific Rotax engines and they allow several responses, including monitoring coolant temperature and using conventional coolant. EASA 2007-0155 FAA SAIB NE-05-84R1 Jonathan

One of the most import aspects of Evens it effectively eliminated localised boiling at the top of the piston bore to cylinder head. Is that something that you observed or is it taken from the suppliers' claims? I haven't seen any evidence that this occurs in modern engines that aren't faulty. Thanks Jonathan

I figure a couple of big lumps of aluminium (preheated and with a few thermocouples mounted), a small coolant circuit (also with measured temp) and pump will quickly show how good a coolant it is. I have a very strong suspicion about what it will show (even their claims are mostly obvious nonsense) but it's always nice to test for definitive proof of course. I think it would be nice to hear any comments about shortfalls/oversights beforehand. I don't think the type of radiator is too critical however, so long as it is the same for all coolant tested It would be great to see some experiments. We know that the thermal capacity of Evans Waterless Coolant is less than that of conventional coolant. So I'd encourage you to concentrate on experiments that don't spend too much time on that, although you'll probably show it along the way. The more you can make your rig like a real Seven's engine the better. That could include using the same materials as in the block and radiator and getting the flow rates as similar as possible. The logical end point of that is doing the experiments on a real engine. The downside of that of course is the cost of the proprietary product. How much is a couple of engines' worth? I might put in my share... ... especially if we can turn the outcome into a wager with the winnings going to the Club charity. But I'd warn everyone joining in that we also already know that engines run hotter on Evans Waterless Coolant than on conventional coolant. Jonathan

An electric fan with controller will take care of this problem, but I want to retain the mechanical fan. How does the electric fan increase the flow rate to the figures given by Davies Craig when a stalled mechanical pump is in the circuit? Do you mean "pump" rather than "fan" in this? Jonathan

"Flap wheel"! Jonathan

The Marina felt like the abandonment of all ambition by BL. And, not surprisingly, they couldn't make a better Cortina than Ford. At least the front wheel drive successors to the Mini/ 1100/ 1800 tried before failing. Jonathan PS: The 2.0 Ital was advertised as accelerating faster than a Porsche albeit a 924! At the time it was said that the 1.8 TC was faster than the corresponding MGB.

That image doesn't show for me. Jonathan

From RedCat7 above. Measured: 14" Minator with ZV3 13.1 kg. 14" Minator with R888R 14.3kg. Researched: 13" Apollo 4.16/4.76 kg. 13" ZZS 7.65/8.80 kg. 13" CR500 6.05/7.03 kg.

You need the barcode, either printed or shown on a 'phone. I always take my card but the last two times they haven't been interested. NB: Club discount is in addition to offers. Jonathan

Did you have the Marina before the change? But I'd guess that the answer has a strong Ruritanian flavour. Jonathan

Why was the Italian version of the Allegro called something else? ;-) Jonathan

The page from the 1998 Assembly Guide and some discussion. Jonathan

Thanks Jonathan

Have you got John Vine's note about the correct placing of the Schnorr washers? Jonathan

There's lots of data in the archives, but unfortunately scattered across lots of threads. If you can face looking through it how about tabulating the values as you go? Jonathan

When people report next to no pressure in the waterless system, then I asume the expansion coefficient is less. I've never seen any measurement of pressure in the liquid. I have seen the reports of lower pressure in the gas space above. The difference between the two coolants in that respect is the properties at the gas-liquid interface (as it is for their different boiling points), not the coefficient of bulk expansion of the liquid phase. Jonathan PS: I don't know what the difference is in pressure between the two liquids and I can't do it by thought experiment. Can anyone else, please?

Liquids are effectively incompressible: no change of volume with change of pressure. And expansion with temperature is as in #124 above. And we don't know that the pressure in the coolant is different between the two coolants. Jonathan

If the pressure is lower at the same volume / temperature, then I think there'd be less need for "room for expansion" without having a critical pressure. The expansion will depend on the temperature change and the coefficient of bulk expansion (and the volume). The first will be higher and I don't know the second. Other things being equal an engine cooled by Evans Waterless Coolant will be hotter than an engine cooled by water and ethylene glycol. The vendors say "3 to 10°C". We don't know that the pressure of the coolant is different between the two coolants. The pressure in the head space above is, and that's what people notice when they remove the cap. Jonathan

Haven't found the 996 story but here's a 968, Ian. Jonathan

Bounced. Jonathan

Con: Expensive and not easy to top up if you haven't got extra with you. Pro: Lower pressure, hence not the same need for a huge expansion bottle which is good when space is at a premium. (and smaller bottle, less coolant=lighter) Does the lower pressure within the system allow the use of a smaller expansion bottle? Assuming that neither is boiling wouldn't that depend on the bulk expansion rather than the pressure? Jonathan