If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#26
|
|||
|
|||
Fuel Quantity Measurement
Andrew Sarangan wrote in
: The reason for the weight sensor was because he did not want to penetrate the fuel tank to add his sensors. Once inside the fuel tank, I do not see the benefit of an optical sensor vs a float sensor. In fact, I don't quite understand why float sensors are so inaccurate in the first place. It is just a variable resistor. The shape of the fuel tank can be easily calibrated out. Averaging the sloshing is equally easy to do. Anyone know what makes them so notoriously inaccurate? The mechanical ones, like the wire in a cub or T-craft, was very reliable. The mechanicla dial gauges you see in the Luscombe, Citabria and some older Cessnas are also pretty good, though you have to undertand what the airplane's attitude can do to some indications. It's when there is an electrical connection that it seems to go wrong. There is one system I have seen in an old car that was extremely accurate and reliable. It had a tube that ran from the panel to the fuel tank and inside th etank it branched out to a a number of tubes, about eight, I think. Each tube had a little pan shaped dish on it. In the panel there was a small liquid barometer type device theat sensd the pressure from the tank. The liquid in the gauge was a red substance, supposedly metal, that showed the level in eights of a tank. I can't remember what the stuff was but it was extremely dangerous to handle and you had to send the gauge to a specialist to have it filled. It worked really well, bu tI doubt it would be much use in an airplane. Bertie |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Time, running out of fuel and fuel gauges | Dylan Smith | Piloting | 29 | February 3rd 08 07:04 PM |
Russian Airplane Instrument Gauges | Steve | Restoration | 1 | October 2nd 06 10:50 PM |
Fuel Level Sight Gauges | DonMorrisey | Home Built | 5 | August 10th 06 05:00 AM |
Need the temp and oil pressure gauges for a J3, where do I get them? | Eduardo B. | Restoration | 0 | December 5th 03 12:59 PM |
FA: Vintage aircraft gauges | Randal Peterson | Aviation Marketplace | 0 | November 13th 03 02:05 AM |