BruceW said:I have a single landing light and want to add a flasher to
the electrical system. I read somewhere that the
"wing wags" will burn out if you attach them to
only one light.
Any single light "flashers" that are recommended???
Thanks.
Bruce W.
Bryan Wood said:You might measure the resistance of your landing light bulb and put a resistor with the same resistance on the other output of the wig wag. The wig wag won't know there isn't a bulb there. So that you don't have to do a bunch of math to come up with a wattage just go with something kind of big like a 3 watt resistor and it should work out.
Regards,
az_gila said:This resistor will also prevent the needle of your ammeter (if you have an old fashioned analog one... ...) wiggling and distracting you...
Bryan's power calculations are a little bit shy....
If you have a 100 watt landing light bulb, a 1.2 ohm resistor should do it... needs to be about 50 Watts though (100 watts - same as the landing light, but with a 50% duty cycle, makes it 50 watts dissipated in the resistor).
I would use two 2.4 ohm resistors of 25 watts each in parallel to get the 1.2 ohms...
Mouser has them cheap... bottom right of this page...
http://www.mouser.com/catalog/628/526.pdf
gil in Tucson
Grumman does this with the old fashioned red flashing quartz bulb on top of the rudder...
Bryan, you mixed up the ohms and watts. The bulb is 100 watt. Power = E^2/R so R=E^2/100.Bryan Wood said:Gil,
I'm missing something here. If one channel has a 100 ohm light on it, placing a 100 ohm resistor to simulate a like bulb on the other output would require a 1.44 watt 100 ohm resistor. It is basic ohms law. I=E/R or 12/100 to find current. Then I squared R to get power. 12/100=.12
Square .12 and get .0144. Multiply times 100ohms = 1.44 watts. Here is an ohms law calculator that you can use to check the math. Using a smaller resistor (physically) will keep you from having to do a new weight and balance afterwards.
http://www.angelfire.com/pa/baconbacon/page2.html
Best,
BruceW said:I have a single landing light and want to add a flasher to
the electrical system. I read somewhere that the
"wing wags" will burn out if you attach them to
only one light.
Any single light "flashers" that are recommended???
Thanks.
Bruce W.