red750 Posted April 18, 2023 Share Posted April 18, 2023 Sorry, this relates to bicycles? How? Link to comment Share on other sites More sharing options...
facthunter Posted April 18, 2023 Share Posted April 18, 2023 Temp. sender is a good idea. IF you have near port injection it's rare to get icing and a backfire is less damaging to the motor. Nev 2 Link to comment Share on other sites More sharing options...
Bruce Tuncks Posted April 18, 2023 Share Posted April 18, 2023 Thread drift, Red. I do it all the time....sorry. I have never had carby icing on a bike. 2 Link to comment Share on other sites More sharing options...
facthunter Posted April 18, 2023 Share Posted April 18, 2023 I've had it on OLD motorbikes. Nev 1 Link to comment Share on other sites More sharing options...
onetrack Posted April 18, 2023 Share Posted April 18, 2023 Getting back to bicycles - just a reminder below, about the number of people who can think outside the square - and who can get a bicycle with square wheels to work. 1 1 Link to comment Share on other sites More sharing options...
red750 Posted April 18, 2023 Share Posted April 18, 2023 Why???? Link to comment Share on other sites More sharing options...
spacesailor Posted April 18, 2023 Share Posted April 18, 2023 That corragated road is on the ' Cape York ' after Bamaga . spacesailor 2 Link to comment Share on other sites More sharing options...
onetrack Posted April 18, 2023 Share Posted April 18, 2023 2 hours ago, red750 said: Why???? Because they can. And to have fun, confusing onlookers. Many years ago an old farmer told me about a local festival they had in their little country town in W.A. (I think it an anniversary of the towns founding.) He related to us with increasing mirth, as to how a couple of the locals had got hold of a number of bikes and different-sized bicycle wheels, and had spent many days taking all the wheels and spokes apart - and then re-assembling them with mixed lengths of spokes, so the axles were well off-centre. They then decorated the bikes for the gala run through the main street in front of the crowd - but of course, the main hilarity was around the effect on the watchers of seeing the blokes trying to ride these bicycles with offset axles. Of course, to the onlookers, it was like the bike riders were riding a bucking bronco, with the front and rear of the bikes frames, bouncing up and down - and out of sequence, all at the same time! The old farmer was so overcome with mirth relating to the sight of the out-of-sequence riders, he could hardly talk for laughing, and I think this added to the story. 1 Link to comment Share on other sites More sharing options...
facthunter Posted April 18, 2023 Share Posted April 18, 2023 The one where it's essentially a treaded conveyor belt would take a lot of muscle to go far. Indian tried a set of wheels with flat sectioned curved spokes and true rims "spring wheels" but I don't think they were very successful. You can see them in a Book called "the IRON Redskin" by Harry V Sucher. Nev 1 1 Link to comment Share on other sites More sharing options...
Old Koreelah Posted April 18, 2023 Share Posted April 18, 2023 6 hours ago, Bruce Tuncks said: How about a temperature sender at the carby? .... just thinking aloud here.. Who needs yet another gauge to look at? All we need is the bluddy choke mounted so it sticks out where you’ll notice it, like in the way of the throttle lever. 1 Link to comment Share on other sites More sharing options...
facthunter Posted April 18, 2023 Share Posted April 18, 2023 You got hiccups Masta? Most planes a have an OAT gauge and some cars do too for icy roads little lights come on. You could do it for a plane too. You'd only have to look at it in conditions where ice maybe likely. We are still having Planes crash due Carb icing.. Nev 1 1 Link to comment Share on other sites More sharing options...
facthunter Posted April 18, 2023 Share Posted April 18, 2023 The choke only works with the throttle near closed or closed Anyhow it's certainly Thread drift. I have had ice on bicycles. You only have to go to Ballarat. Nev 1 Link to comment Share on other sites More sharing options...
Old Koreelah Posted April 18, 2023 Share Posted April 18, 2023 13 minutes ago, facthunter said: Most planes a have an OAT gauge and some cars do too for icy roads little lights come on. You could do it for a plane too. You'd only have to look at it in conditions where ice maybe likely. We are still having Planes crash due Carb icing.. Nev I fitted an indoor/outdoor weather station to my panel a decade ago. Reads temperature of cabin, air going into carby (quickly rises when carb heat is selected) and humidity- a useful indicator of icing conditions. 1 1 Link to comment Share on other sites More sharing options...
facthunter Posted April 18, 2023 Share Posted April 18, 2023 The lower carby body temperature is a good indicator. You can get icing at 26 C due to venturi effect and fuel vaporisation. Nev 1 Link to comment Share on other sites More sharing options...
Bruce Tuncks Posted April 20, 2023 Share Posted April 20, 2023 Bugger nev, I reckoned that ice would hopefully produce a reading of zero or near zero. 26 ! that should be safe as a carb body temperature , thought I. If you need to measure humidity as well as temperature then it is getting too hard, just like the posters are. Yes I have seen them and learned that icing can occur at quite high temperatures of the air, but I reckon its too hard to use during flying. Link to comment Share on other sites More sharing options...
facthunter Posted April 20, 2023 Share Posted April 20, 2023 Cloud base gives you a good indicator of humidity or fog patches near the ground. a lot of unexplained engine failures are (Isuspect) actually carb icing events.. Nev 2 Link to comment Share on other sites More sharing options...
spacesailor Posted April 21, 2023 Share Posted April 21, 2023 Perhaps that aircraft ditch in WA was icing , due to flying over surf & not that high . How would you measure humidity at hight over the surf beach ? . spacesailor 1 Link to comment Share on other sites More sharing options...
rgmwa Posted April 21, 2023 Share Posted April 21, 2023 No surf, nice sunny day but engine not working, so icing probably played only a minor part in the ditching. 1 Link to comment Share on other sites More sharing options...
old man emu Posted April 21, 2023 Share Posted April 21, 2023 2 hours ago, spacesailor said: How would you measure humidity at hight over the surf beach ? . Humidity is measured using a hygrometer. which gives you the relative humidity. You check your Outside Air Temperature gauge, then you use a probability chart But there's an app for that! https://apps.apple.com/us/app/carburetor-icing/id1393862789 1 Link to comment Share on other sites More sharing options...
onetrack Posted April 21, 2023 Share Posted April 21, 2023 At 5.00PM on the 20/04/2023, which is when the crash occurred, the air temperature at Swanbourne Beach (just a little N from Leighton Beach) was 24.8°C, the dew point was 6.6°C, and the relative humidity was 33%. Doesn't seem like the chances of carburettor icing were particularly high at that point in time, and at that location. http://www.bom.gov.au/products/IDW60901/IDW60901.94614.shtml 1 Link to comment Share on other sites More sharing options...
facthunter Posted April 21, 2023 Share Posted April 21, 2023 Wet and Dry bulb temp reading s give a good indicator of dew point If they are close fog is likely. An off shore wind won't be high humidity generally but a late afternoon Seabreeze can bring in FOG which is 100% rel humidity when the temp starts to drop. Carb icing relates to humidity at LOW temps due the adiabatic expansion and latent heat of evaporation of the fuel.in the carb. itself. Nev 1 Link to comment Share on other sites More sharing options...
nomadpete Posted April 21, 2023 Share Posted April 21, 2023 Not relevant to velocipedes, but the news report about the Perth ditching did remark that there was no risk of pollution resulting from placing the aeroplane in the sea. Does that imply that there was no petroleum present? That has been previously found to cause poor performance of aero engines. Link to comment Share on other sites More sharing options...
onetrack Posted April 21, 2023 Share Posted April 21, 2023 The recovery report says there was a small amount of "fuel leakage" in the vicinity of the sunken aircraft. Swimmers were advised to keep away, but it still didn't stop the nosey snorkellers. https://www.abc.net.au/news/2023-04-21/wreckage-removed-of-light-plane-that-crashed-leighton-beach/102250564 Link to comment Share on other sites More sharing options...
nomadpete Posted April 21, 2023 Share Posted April 21, 2023 Sorry, my speculation was based on thursday's report, which quoted the police as saying there was nofuel spillage. I should know better than to listen to 'news'. Anyway, I shouldn't have posted flying stuff on the 'off topic' forum. Apologies everyone. 1 Link to comment Share on other sites More sharing options...
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