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#11
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#12
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I should have thought of looking there, thanks.
Very strange specs. It says that you need more current on the higher voltage system, which is wrong. You actually need less than half the current on the double voltage system to produce the same amount of heat. So for those pitot tubes it says you need 120W of heat for a 12V airplane and 360W of heat on a 24V airplane. I figure both airplanes will ice the same regardless of the battery inside. On the same page there is a pitot heater that needs 3-4 amps at 24V (90W), so something is fishy here. The 3-4 amp is pretty doable with a boost converter, the higher current (15 amps) stuff gets a little fancier. One idea I'd suggest considering is just running the 24V heater on your 12V system. Realize that you're only putting 1/4 the heat into the tube and fly accordingly into icing conditions. Don't fly as high, as fast, or for as long in ice clouds. Its better than a non heated tube and you've got a ready to go solution. Later, if you have time and money, you can add the power supply to give full heat. There seems to be some variabity anyway on how much heat a pitot tube really needs to have, compare the 90W vs 360W above which is 1/4. Regards (B2431) wrote in message ... From: (Jay) How much power does a typical pitot tube heater need? Aircraft Spruce shows 10 amps for 12 V and 15 amps for 24 V. Dan, U.S. Air Force, retired |
#13
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You might be able to convert a 12 volt soldeing iron for a lot cheaper than
the "aircraft" item. A pitot tube is simply a metal tube and if the element will fit around it, you may be able to roll it yourself. Hope this helps, Peter |
#14
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I made my own heated pitot with aluminum tubing and a 12V Cessna pitot
heater element. You can see the details at http://www.abri.com/sq2000/18.html (about 5 frames from the bottom). The total cost was about $40 - and it's "new". ------------------------------------------- Paul Lee, SQ2000 canard www.abri.com/sq2000 (B2431) wrote in message ... Will running a 28 volt pitot tube heat on 12 volts heat it enough to use? I keep seeing 28 volt pitot tubes on e-bay and was wondering if they would do the job. Dan, U.S. Air Force, retired |
#16
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Hi all,
Can the standard heated pitot tube element be changed? I have looked at mine and can't figure how to get it apart. I believe its the standard 5812-12v type. Thanks Dave B2431 wrote: From: (Paul Lee) Date: 4/7/2004 11:06 PM Central Daylight Time Message-id: I made my own heated pitot with aluminum tubing and a 12V Cessna pitot heater element. You can see the details at http://www.abri.com/sq2000/18.html (about 5 frames from the bottom). The total cost was about $40 - and it's "new". ------------------------------------------- Paul Lee, SQ2000 canard www.abri.com/sq2000 (B2431) wrote in message ... Will running a 28 volt pitot tube heat on 12 volts heat it enough to use? I keep seeing 28 volt pitot tubes on e-bay and was wondering if they would do the job. Dan, U.S. Air Force, retired I like it. Mind if I swipe the idea? Dan, U.S. Air Force, retired |
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