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12-06-2012 09:51 PM  7 years ago
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jespicer1

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memphis, tn

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align 3g on a 450
I finally got around to flying my fbl 450. My aileron and elavater gains were close to 12 on the pots. Way to much. Lol. It was windy. I was in ff and gave it a little collective. The nose went strieght up. Lol. I saved it and continued to fly. I understand the tuning for the cyclic.

Problem is as follows:

I have my tail lock gain a 40. The tail still had a little wag. So I took the tail total gan down to 40, and set the gain on the radio at 70. I have 0 wag but the tail blows out on flips and fast climb outs. If I move the total gain up and the gain on the radio down it will wag just a bit. More of a slight shimmy.

I have the sensor mounted with the clear Parma gel type tape.
Should I be using a different type of mounting tape?

The heli flew great with the flybar and a mini g on the tail before I went fbl.
I am using align cf main blades. The head speed is around 3400 rpm.
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12-07-2012 10:04 AM  7 years ago
coolice

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Northamptonshire, England

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Hey.

Are you using the stick Align 325D main blades? If yes that will be a cause to your pitch up in FFF with collective pitch changes, combined with 3G settings.
I spent a long time tuning a 3G on my own 450PRO and I found that FBL main blades were needed on this size of model to make them more predictable and stable.
You need to increase the lock gains slightly and also the collective pitch compensation (need to check actual slider name as its been a while since i played with a 3G) to help remove the pitch up tendency.

If you would like to try them I have my settings file I used for the 3G running V2.1 firmware and Align 3G main blades.

With the tail, are you're tail blade grip bearings in good condition and the tail mechanism free to move?
Most tail problems can be traced to a problem here if after settings changes problems still exist.
Also what length tail servo arm are you running? Perhaps you may need to shorten this distance to be able to run a higher gain value, to give you better hold, before wag sets in.

The mounting pad you are using could also be too rigid for the 3G, try a foam pad such as the one which comes with the Align gyros.
Where do you have the sensor mounted? As this can effect vibrations being picked up also.
.
Ian Contessa
Team Robbe SchluterUK
Midland Helicopters
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12-07-2012 04:30 PM  7 years ago
jespicer1

rrApprentice - memphis, tn MyPosts All  Forum  Topic

I am running the 325d blades. I have the sensor mounted on the boom block. I am running the 3.0 firmware.

I have a ds520 on the tail. The linkage is at 8 mm away from center. The tail is butter smooth with zero slop.

I will try some dubro foam tape. I bought a pach with assorted thicknesses in it a while back. Hopefully the weather will be nice this weekend so I can test it out. I am determined to get this thing flying well.
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12-07-2012 06:03 PM  7 years ago
coolice

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Northamptonshire, England

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Hey.

Fitting the Align 3G main blades will give a much better FBL experience over the standard D's, as they are weighted better for FBL use and so track better in FFF.

You can go in a bit on the tail servo arm, even to 7mm will yield a higher gain value overall with plenty of holding power.

Try a different pad and let me know how you get on.
.
Ian Contessa
Team Robbe SchluterUK
Midland Helicopters
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01-03-2013 06:22 PM  7 years ago
jespicer1

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memphis, tn

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I swapped the gyro tape over to foam. Raised my tail total gain back to 70. I now have the gain in my radio set at55. Hovers smooth with zero wag. I also got ac set of align 3g blades. I have not been able to get it out for a real test flight due to the weather. I will post my finding as soon as I can get out to the field for a few real test flights.
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01-24-2013 05:45 PM  7 years ago
jespicer1

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memphis, tn

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I finally got to fly the 450. It flew great. The tail is solid with no wag.
It takes a little effort to tune the align units. The pay off is great.
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01-24-2013 06:57 PM  7 years ago
coolice

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Northamptonshire, England

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Hey Buddy.

Ah that's good news.
Yes you are right, the 3G and 3GX take perhaps a little longer than some FBL units to get flying ncie, but when they are their great performers!

Have fun.
.
Ian Contessa
Team Robbe SchluterUK
Midland Helicopters
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01-24-2013 07:00 PM  7 years ago
FireNWater

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Collierville, TN

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.
Sweet, been following your thread. Hope to get mine (same setup and issues) out flying this weekend.
.
Buy Cheap, Buy Twice . . .
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01-24-2013 07:13 PM  7 years ago
jespicer1

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memphis, tn

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I also helped a friend setup a 3gx on a 450 pro this past weekend. We have not had a chance to test fly it yet though. He was flying on a ar7200 that he transplanted into a new 600e DFC. I will post his thoughts on the comparison when we get it in the air.
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01-27-2013 10:59 PM  7 years ago
jespicer1

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memphis, tn

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I ran 2 batteries today. I had a little pitching up in FFF. It is bouncing out of Tic-Tocs. So a little more tuning is needed.

The tail was rock solid.

It was a little windy today though.

I will post my results after i get it back in the air with the new settings.
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01-27-2013 11:14 PM  7 years ago
gmcullan

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Southbridge, MA

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I have Edge 325mm FBL on all three of my Align 450's with excellent flight characteristics. If it makes a difference, my flying style is "old fart" big sky maneuvers.Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450
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01-28-2013 05:01 AM  7 years ago
FireNWater

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Collierville, TN

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.
Flew my 450 FBL (3GX w/Futaba S-Bus receiver) today for about six flights. I moved the pushrods to the inner holes on the servos and drilled a hole as close to the center as possible on the rudder servo.
.
Aileron gain is all the way to 100%, and elevator gain is about 12:30. Rudder gain is at 28%. Helo flies well.
.
3G blades are arriving tomorrow.
.
Overall I'm really glad I made the switch and installed the FBL. Hoping that the 3G blades will put the icing on the cake!!
.
Buy Cheap, Buy Twice . . .
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01-30-2013 09:17 PM  7 years ago
jespicer1

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memphis, tn

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I flew in 20mph winds on Monday. It handled really well. Still a slight tendency to pitch up with positive collective inputs. Should I turn up the collective compensation?
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01-31-2013 12:55 AM  7 years ago
FireNWater

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Collierville, TN

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.
My 3G blades arrived today. I'll let you know how they work. They're supposed to make the helo fly alot better. . .
.
Buy Cheap, Buy Twice . . .
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01-31-2013 02:49 AM  7 years ago
jespicer1

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memphis, tn

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Yeah, going to FBL blades made a huge difference on mine.
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