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| Subject: Ethanol | |
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Author: Bob P |
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Date Posted: Sat, Nov 24 2012, 12:42:04 GMT I’m posting this in response to Alan Gill’s concerns about Ethanol in his classic car (only slightly off topic) as mentioned in the latest news letter. Alan try checking BP Ultimate (not the regular EN228 stuff) – around here (from Kingsbury depot in the Midlands)it’s ethanol free. As a bonus the higher octane rating should ward off detonation. BP also claims that it contains additives that help to clean the engine internals {see website www.bp.com/ultimate/uk }. I get quite paranoid with regard to ethanol in my Pulsar. It’s not the LAA/CAA regs, or engine fuel system that I worry about, but I am concerned that any ethanol might eventually dissolve the glue that holds my fuel tank together and dump its contents on my lap (MK1 Pulsar with integral fuselage fuel tank). To check for ethanol I’ve refined the “water test” so that it is sensitive enough to detect as little as 0.5% ethanol. I inject 5ml coloured water from a calibrated syringe into a 100ml glass bottle; top up with fuel; fit the cap; shake well; and then leave overnight to settle. The next day I syringe the water back out, and the scale shows me if the level has increased. Any increase in ml is roughly proportional to the % alcohol 1ml increase = 1% etc). I use an “inkjet refill kit” syringe that has a scale on it, and a drop of inkjet dye in the water sample makes it easier to read the exact level – and also to see that all the water under the fuel has been hovered up (important). It doesn't matter if you suck up a bit of fuel as well as you can see (and measure) just the coloured water level. Note that BP Ultimate is not EN228 and is not therefore approved for aviation use because of the additional risk of vapour locks. I’ve tweaked my Pulsar fuel routing (revised routing LAA approved) to minimize the risk of vapour locks. Cheers Bob Pulsar MK1, Rotax 582, taildragger. [ Next Thread | Previous Thread | Next Message | Previous Message ] |
| Subject | Author | Date |
| Fuel | Captain Pulsar | Sun, Nov 25 2012, 21:24:48 GMT |
| ethanol | Cy yardley | Wed, Nov 28 2012, 21:49:54 GMT |
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| ethanol | croz | Sat, Dec 08 2012, 11:21:02 GMT |
| Ethanol | Dave Piercy | Thu, Dec 13 2012, 12:05:22 GMT |
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