Originally posted by RCjetdude
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Official Freewing 80mm EDF L-39 Albatros Thread
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Originally posted by Hardway View PostJust to make sure you are in the right screen, you must enter the System Settings and select Aircraft Type. Then select Wing: 1 Ail 1Flap Tail: Normal
After that, exit and go to the Function List and select Flap System and then use the setting I have above to get stated....
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Originally posted by Wiz1 View PostI’m getting mine ready for the maiden but I wanted to ask what expo are you guys using?
It's also wise to program a three position switch for Aileron, and one for Elevator. Set factory throws on High, then reduce throw slightly for Medium, then reduce it further for Low. It's typical to slightly increase Expo as the throws decrease. Use this as a method to quickly toggle to different settings during your maiden to find the sweet spot for your flying style. If any setting is too high for you, no problem, just toggle to the lower setting. It's a Goldilocks affair. We all define "just right" differently, but overall the manual is a good starting point for High, then you create a reduced setting for Medium and Low. Land and repeat the process until you have the model dialed in to your preferences.
Example on my L-39, note these settings are my preference (High, position 0), and I also hand the radio to other test pilots with their preferences for different throw/expo relationship. Some of them fly Aileron at Low, position 2, and Elevator at either High position 0 or Low position 2.
Aileron (switch C on DX9)
0: 100% throw, 20% expo
1: 80% throw, 30% expo
2: 60% throw, 25% expo
Elevator (switch F on DX9)
0: 100% throw, 20% expo
1: 90% throw, 25% expo
2: 75% throw, 30% expo
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Originally posted by Hardway View PostFlap System
Pos 0: -90% Elev 0%
Pos 1: -40% Elev: 2%
Pos 2: 10% Elev: 5%
Switch: Switch D
Speed 6.0s
Pos 0 is Flaps Up.
I have them set at -90% so there are a few "clicks" (values) of adjustment left instead of setting full up at -100%.
So, I set the value at -90%, then adjusted the pushrod length to get the flaps into the correct "full up" position against the stops in the top surface of the wing.
Then the other settings are "Take Off" flaps (-40%) and "Landing" flaps 10%
There is no reverse on the channel and no sub trim and servo throw is set at 100%
Hope this helps. I flew the maiden and check flights at these setting and it worked perfectly for me, with the CG set at 103mm. Jerry
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Originally posted by jtconte View Post
Took out all I did and followed your setup. Works and makes sense. I didn’t realize I could put in negative values into the Flap System. Using your values, I measure 11 and 24 mm flap throw while the manual calls out for 19 and 29 mm. Also, the Speed of 6 seems long but I literally know nothing about it. I greatly appreciate all the advice!
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My old Futaba 7C radio doesn't have a delay option for the flaps, so I use the dial for flaps and it works great, does the same thing as you slowly roll it to full flaps, for those who don't like a delay might want to try a dial. I did get a chance to use a FrSky X10 and tried the delay, it was 3 seconds and have to say, I liked it. I set it up on a 3 position switch, looked really scale coming down really slow, actually might buy the X10, very nice radio.
Surprised you guys are using expo and all that on the L-39, of course I don't use expo or dual rates but the L-39 felt really locked in as it was.
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I have my L39 ready to Maiden this weekend with my Morgan Machine battery try installed, this is actually a modified Avanti tray I am meeting up with Gary next week to give him the specs so he can make them proper if people are interested. Cg's in slot 5 with 5000 and slot 3 with 4000.1 Photo
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