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Other › OK - I give up - I need your help !!
11-26-2006 03:57 AM  11 years agoPost 1
bbking9

rrNovice

Plano, TX

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Now matter what I try - I cannot get my 450SE to lift off the ground or even get the skids light and moving about. It is like it is nailed to the ground. Even at full throttle - it is still on the ground.

Here is my setup

Trex 450SE
Align 430L motor
Align 35A
GY401
HS56MG servos all around except tail - HS-81MG
DX6

Yes - main blades are turning clockwise, Tail is turning counter clockwise.

Yes - I have a ton of headspeed.

Here is how I programmed my DX6 - http://www.digimemphoto.com/pdf/ . Had to reduce CP6 to 48 cause at 60 I was getting 14 degrees pitch. At 48 I get 10 degrees positive.

I can hover - well on my blade CP - anyway.

I think I have a radio setup problem - but have no idea where to go from here.

At low throttle - Pitch = 0
At mid throttle - Pitch = +5
At high Throttle- Pitch = +10

Am not doing any 3D - just want to hover right now. Running in Normal mode.

Help - I know it is something obvious - I may just be too close to see it !!!!!

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11-26-2006 04:33 AM  11 years agoPost 2
OUCaptain

rrApprentice

Heli Addict Rehab Center

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Do you have a pitch gauge? Disconnect your motor and push the stick up. See what kind of pitch you get around 1/2 to 3/4 throttle. 1/2 stick should be 0 degrees and 3/4 around 5 degrees. The laws of physics can't be broken. If you have headspeed and positive pitch, it will lift off. Unless your heli is made of lead

"Human beings are viruses with shoes"

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11-26-2006 04:42 AM  11 years agoPost 3
bbking9

rrNovice

Plano, TX

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Yea - Mr. Newton is playing tricks on me.

Low stick = 0 degrees
Mid stick = 5 degrees
High stick = 10 degrees

These are measured with an Align Pitch gauge.

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11-26-2006 05:01 AM  11 years agoPost 4
OUCaptain

rrApprentice

Heli Addict Rehab Center

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Yeah, Mr Newton can be a tricky SOB sometimes. When you say tons of headspeed, what are we talking about. First thing I found when I went from my CP to Trex was that my idea of high headspeed was a bit off. Have you check your trottle curves? I ended up putting a high arc on my curve to get the speed up a bit earlier.

"Human beings are viruses with shoes"

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11-26-2006 05:49 AM  11 years agoPost 5
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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Did you spill some CA on the driveway?

Seriously, this does sound odd. Start with the basics. Check that the blades and paddles are mounted correctly. Also check again with your pitch gauge, it is possible you are reading it backwards, and have dialed in tons of negative pitch. Also check which flight mode you have programmed, and how you have the switch on the Tx.

Let us know what you find!

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11-26-2006 06:50 AM  11 years agoPost 6
bbking9

rrNovice

Plano, TX

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My LHS is open tomorrow. I'll have them check it out.

Thanks guys and I was wondering what happened to my new bottle of CA !!

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11-26-2006 07:02 AM  11 years agoPost 7
MrMel

rrProfessor

Gotland

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Did you measure the pitch in the correct "direction", (towards the front of the heli) else you might have the pitch reversed..

Just a thought.

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11-26-2006 03:42 PM  11 years agoPost 8
rky5

rrVeteran

Oak Hills california

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Wow the most I can get with 60% is about 11degrees
That set up on that site you posted is very close so I dont think that is the problem.

Someone already mentioned something about backwards pitch.... or your blades on backwards maybe ..........that trex is hard to keep on the ground at full throttle! unless you are nagative on the pitch.

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11-27-2006 02:03 AM  11 years agoPost 9
bbking9

rrNovice

Plano, TX

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As I come before all of you now - with me head held low - in shame, I have my 450 hovering. Turns out I thought I knew which side of my pitch gauge was + and which was -, turns out I didn't.

So after reversing the pitch, aileron and elevator servos - all is right with the world.

I will sulk away now and lick my woulds while you guys post such things as "I told you too check the pitch", "what an idiot", etc...

Thanks for your help.

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11-27-2006 02:18 AM  11 years agoPost 10
slider46

rrProfessor

Ocala Florida

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Just glad to hear you got help and your up and flying. "IF you don't make mistakes your not learning anything."

Tom..... No "D" flying....

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11-27-2006 03:57 AM  11 years agoPost 11
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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Hey bbking9 don't worry about it. At least you had the guts to admit what happened. We all do things like this! Glad you figured it out!

The other night I was using the heat gun on some heat shrink, and had my whole box of organized heat shrink in all sizes on the table, right behind my work. Thank goodness I noticed it just as I turned on the gun

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