Uh, Stein, I don't see a Stein-Air T-Shirt in that box. Could it be because you already have all his money?
I think I would rather hand wire the entire panel, with Klick on breakers, that try to decipher that computer gobblegook in post 44
As one of our other shirts says..."He's broke, we're happy"!
Cheers,
Stein
Can you be more specific on the thermal heat shrink tube labels? Brand? Size? and which machine? Maybe a source as well?
Inquiring (lazy) minds want to know
Can you be more specific on the thermal heat shrink tube labels? Brand? Size? and which machine? Maybe a source as well?
Inquiring (lazy) minds want to know
Brian,
I got mine before you got yours!!! Nanny nanny boo boo!!
Stein had better not be sending you a t-shirt, I didn't get one. All I have is some lousy (nice looking) key chains!
You guys are killing me with you high dollar panel upgrades. I'm trying to skimp up enough cash to buy my second EFIS on my panel so my daughter can see what the heck is going on when she flys with me (if I ever get done with the build).
Va = alternator voltage
Vb = minimum battery voltage at discharge
Ic = desired charge current
then you have R = (Va-Vb) / Ic
So if your alternator outputs, say, 14.8 volts and the battery has discharged to 11.8 volts and you want a maximum of 2 amps charge current, 14.8-11.8=3, 3/2=1.5, so you'd need a 1.5 ohm resistor.
If you were to actually start a charge from the maximum discharge voltage on the battery, you'd be dissipating 6+ watts in this configuration until the battery voltage starts coming up.
As the battery voltage comes up, of course, the change current drops off until it reaches essentially zero when the battery equals the alternator output.
Doing some quick math (often a dangerous thing) ...
The 10 ohm resistor in your charging circuit is pretty large. According to an EE I consulted for the same topic, here is what I got ...
If I use your 10 ohm resistor, as assume a backup battery below usable voltage - say 4.8V - I get the following ...
10 = (Va-Vb) / Ic
10 = (14.8 - 4.8) / Ic
Your charge current is 1A.
Brian,
One thing I am curious how you solved is the back support for the radio stack. Do you have a direct supporting connection at the back of your radio stack and if so, how is it fastened ?
In my case, I want my panel to be easily removable. The radio stack back "support connection" is what I have not figure out yet.
Question:
Will having the alternate battery being recharged any time the master is on shorten the battery life? When we updated my panel we put the alternate battery on a breaker to the avionics bus only. That way I can get the atis info and program the 396 and 430 off the alternate battery without the master being on. After starting the engine I then turn on the avionics master and rechage the alternate battery until I get my first 396 advisory to switch fuel tanks at thirty minutes into the flight. Then I turn off the breaker to the alternate battery until the next flight. It doesn't make sense to me to have the alternate battery controlled by the master breaker and having both batteries discharging at the same time.
Just my 2 cents.
John Morgan
Well my birthday is Dec. 26th and all my life I have been sorta shorted in that regard
It was the quick change of the label from Christmas to the Happy Birthday label. The number of presents didn't chance just the labels (Dec. 24 for me); and, you will love the G3X with the closely coupled GX Pilot.I know how you feel, mine is on the 27th. Did you get the ..."that will do for your Christmas and birthday" line?
However all of the "goodies" you have under the tree look great, hopefully that makes up for all of the "shorted" birthdays. So here is an early Merry Christmas and a Happy Birthday for the 26th.
Jim
Even though the directions specifically say to allow the shield drain wire to extend toward the connector, this does not work out very well and for the rest of em, I will make em extend away from the connector.
Give myself a little more extra wire sticking out past the solder sleeve for clearance of the clamp...the recommended amount is in the middle of the range and it is not enough.
Something else to consider is the cost associated with all the materials to make these harnesses is not insignificant. The cost of the wire, heat-shrink, labels, terminals, solder sleeves, shipping etc. all adds up and quick.
It is difficult to estimate the amount of wire and supplies you need and it seems like I am always going to run out of something. Order plenty of extra so you are not stuck waiting on more and having to pay extra shipping on it.