ORIGINAL: joeflyer
DJ,
You are correct on your servo count. There are a number of ways to do the gear and doors. If you use a UP3 valve, which pneumatically sequences the gear and doors, you can eliminate one servo. Another way to eliminate the door servo is to use a button valve to close the doors after the gear is up.
I had a Jomar electronic sequencer that I was planning on using. So I set it up with separate servos and used the supplied air valves. After hooking everything up I discovered that when the gear is down and I turn on the radio, the servos would jump to the up position then back to the down position. So I nixed the sequencer.
My solution was to mix an aux. channel (for doors) to the gear channel, then use the servo slow feature of my 9303 to sequence them. Now with gears down and doors open when I hit the up switch the gear servo moves at normal speed to retract the gear. The door servo slowly moves to the close position allowing the gear to be tucked away before the doors close. When I select the gear down position the door servo moves at normal speed to immediately open the doors and the gear servo slowly moves to the down position.
Joe
Joe/Guys
These two photos are from the F-16’s manual #103 and 104. Notice that they are two different setups. One has 3 servos with white arms operating 3 valves. I suspect one each for brakes, retracts, and doors.
The photo has two servos with black arms operating 2 valves. I suspect the brakes and the retracts. I also see what appear to be a
Jet-tronic Single Action Proportional Brake Valve and
Jet-tronic Super Flexible Gear Door Sequencer. But if the Jet-tronic brake valve is used, then what I suspected above isn’t true.
So tell me, anyone, in the second photo, what are those servos, valves, the Jet-tronic devices used for?
I was going with a UP3 for gear door sequencing using only two servos, but looking at that photo, I’m confused.
How many air tanks come with this bird: two, three? If two, then two of the three functions (brakes, retracts, and doors) uses one tank - correct?
Other:
Where is everybody? I know where you are, Mike—in China having a ball [:@]
Mr DJ