|Feb 15, 2013, 05:46 PM|
Here is a link to a nice setup guide that Rick Shelby did:
I still fly my Zenith 3.7 every weekend - please let me know if you have any other questions or would like a copy of my setup.
Hope that helps.
|Feb 15, 2013, 09:41 PM|
I obviously need to spend more time programming. I'm still consider myself a beginner at these moldie full house gliders. What I think I need to do is set it so that it is as simple as possible but not dangerous and build on it from there. I first need to learn how to fly it before I start complicating it. I will not be able to maiden it until mid April at the earliest. The sod farm is under a foot+ of snow.
|Feb 16, 2013, 03:14 AM|
Agreed - simple is good to start with.
I fly a DX18, but also have the configuration from when I had a 9303.
Here is the setup I use that I recently sent to a local member that bought a new Zenith 3.7:
Ail up 23.5 deg – ~20mm
Ail dn 5 deg – ~5 mm
Ail to flap mix up 1.5 deg – ~2.5mm
Ail to flap mix dn 1 deg – ~1mm
Reflex (thermal) 2.5 deg – ~3mm
Reflex (speed) 3.5 to 4 deg – ~4-5mm
El up 7.5 deg – ~10mm
El dn 10deg – ~12mm
Rudder 35 deg – ~25mm each direction
With full flap, 5.5 deg dn comp on El (experiment to your liking)
CG at ~111 mm
Tow hook setting 135 mm (measured for where the nose cone seat up to the fuse) – i.e. the tow ring will sit just ahead of the CG.
When setting up elevator to the servo measure about 100mm from the bottom of the fuse to the top of the rear alignment pin.
Let me know if you have any other questions...
|Feb 16, 2013, 08:42 AM|
Thank you very much Joe and every one else here. These RC groups are great. How the heck did we disseminate information before RC groups and the internet?
Those are a good starting point. Is the tow hook measured to the front edge of the hook? And the CG must be from the LE.
I'll have more questions but not for a couple months. These winters are killing me. Every year about this time I ask myself why the heck did I leave Texas. I may go out to a frozen lake on a nice day and give her a couple hand tosses.
|Feb 16, 2013, 06:07 PM|
When you hang the model on a key ring (or even better, the ring on the winch) and the CG is in a safe spot, the tail should hang down slightly. That way the tow hook is slightly forward of the CG.
Again, this assumes a safe CG (positive stability). Experts tend to tell you that the CG doesn't matter on tow, and the center of the tow ring IS the CG for the plane when on the winch. Confusing? Just remember that CG/Towhook forward planes don't fly fantastic, but they are safe, and aft CG/Towhook planes may just fly ONCE only!
I'm spoiled by being able to fly through the year here. Flew for 4.5 hours today from a bungee- in short pants.
Of course, Thursday night it took me 3 hours to get 73 miles from work to home with perfect weather.
Gotta take the good with the bad.
PS. Yes, standard measurement of CG is from the LE at the fuse sides, measured aft.
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