3D Pro pitch set up problem, help please

StrangeRanger · Apr 26, 2005, 11:19 AM

I've posted on other boards so sorry if you are reading this again, but I still need help.
Trying to set up my 3D Pro and my pitch range is barely -4 to +15. In setting up my servos, with the arms at 90* at mid stick I have +9! How can I lower this number and hopefully get some more negetive pitch?
I have set up other eccpm helis before so I thot I knew what I was doing. I have shortened the mixing arms that go to the blade grips to as small as possible, and my servo linkage arms are as sorth as possible. Others have suggested cutting the mixing links and rods inside them, but c'mon, this is a new heli that has never even been flown!! I shouldn't have to do that kind of crap. Any ideas would be greatly appreciated. Thank you!!
j

skeppley · Apr 26, 2005, 12:20 PM

What servos are you using?

StrangeRanger · Apr 26, 2005, 12:23 PM

HS-55's.
j

RevGadget · Apr 26, 2005, 01:19 PM

I am a newb, but how about adjusting everything on your radio to "0".
Move the Tx to 50% (without batt. connected to heli).
Disconnect servo arms, and install them to where the swash is mid shaft, 0 pitch on blades.
Power on radio and connect batt.
Adjust your swash, E points, and subtrims until servo movement is just right.

Now is this possible or would this be the wrong way to go about it?

TheDudeVT · Apr 26, 2005, 02:07 PM

That's the right way to do it RevGadget, but I think what StrangeRanger is saying is than when he lines up the servo arms, and lines up the mixer arms, the main blades are at +9 pitch. Indicating there must be something amiss with the head geometry....

StrangeRanger · Apr 26, 2005, 02:09 PM

Dude is right, the problem is that with the swash at mid-shaft, ie I have equal travel to go up and down, I'm already at +9! If I move the swash so I have 0* pitch, the swash is almost sitting on the bottom mast collar with no where left to go.
j

skeppley · Apr 26, 2005, 02:29 PM

OK, snapped some pics at lunch for ya.
These are all with the servos and blades at 0*
Maybe you can look over your linkage and compare them. Maybe something is different somewhere.
Hope it helps
Shane

skeppley · Apr 26, 2005, 02:37 PM

What about the swash arms, are yours curved down like in the pic?
Is it possible the small pin the holds the head on the shaft is broken, and the head slid down lower on the mainshaft, causing all the linkages to be pushed up?

skeppley · Apr 26, 2005, 02:39 PM

Oh yeah, is it possible you have the wrong mainshaft? Maybe yours is shorter, or from the wrong bird? This could easily cause all the problems. I will get a measurement for you from the top of the collat, to the bottom of the aluminum head hub ASAP

skeppley · Apr 26, 2005, 02:45 PM

I will try for a measuremet marked in yellow.
It will be after 5PM though

mdttb · Apr 26, 2005, 02:55 PM

What radio are you using ? I've got a Futaba 9C and had to go into the Swash ARF settings and adjust them to:

AIL -60
ELE +60
PIT +25

StrangeRanger · Apr 26, 2005, 02:57 PM

Skeppley, thanks for the awesome help and pics. If your pics are taken at 0*, see how much space you have under your swash, above the collar? If I'm at 0*, I have no space between teh swash and collar. century MUST have Inuendo Removed something up on this bird. Typical century.
j

**EDIT** Todd, I'm using a JR 9303. I'm sure it's not a radio/servo issue. Now that I've been talking with everyone I'm convinved it must be a physical part issue. Something in the geometry just isn't right.

mdttb · Apr 26, 2005, 03:03 PM

Quote:

Originally Posted by skeppley

Oh yeah, is it possible you have the wrong mainshaft? Maybe yours is shorter, or from the wrong bird? This could easily cause all the problems. I will get a measurement for you from the top of the collat, to the bottom of the aluminum head hub ASAP

Skeppley I thought that too but in the end I adjusted the Swash AFR settings on my 9C Tx and every thing turned out just fine.

mdttb · Apr 26, 2005, 04:06 PM

J
Can you check your Settings under Swash Mix - CCPM SwashPlate Mixing and post your values.

StrangeRanger · Apr 26, 2005, 04:12 PM

I'm not at home, but off the top of my head last night I think they were:
Aiel: 60
Elev: 60
Pitch: -55

I thought of messing with that more, but that still wouldn't help or explain why in the middle of the travel range of the swash, which should be 0*, I have 9*. Right?
j

Apr 26, 2005, 11:19 AM	#1
StrangeRanger mugflap_dot_com Join Date: Mar 2004 Location: VT Posts: 337	3D Pro pitch set up problem, help please I've posted on other boards so sorry if you are reading this again, but I still need help. Trying to set up my 3D Pro and my pitch range is barely -4 to +15. In setting up my servos, with the arms at 90* at mid stick I have +9! How can I lower this number and hopefully get some more negetive pitch? I have set up other eccpm helis before so I thot I knew what I was doing. I have shortened the mixing arms that go to the blade grips to as small as possible, and my servo linkage arms are as sorth as possible. Others have suggested cutting the mixing links and rods inside them, but c'mon, this is a new heli that has never even been flown!! I shouldn't have to do that kind of crap. Any ideas would be greatly appreciated. Thank you!! j

Apr 26, 2005, 02:29 PM	#7
skeppley 2 Turbos...Nope 1 Big one Join Date: Aug 2004 Location: Auburn PA Posts: 1,495	OK, snapped some pics at lunch for ya. These are all with the servos and blades at 0* Maybe you can look over your linkage and compare them. Maybe something is different somewhere. Hope it helps Shane Attached Thumbnails 97.2 KB · Views: 144 75.8 KB · Views: 153 81.2 KB · Views: 158 75.0 KB · Views: 149

Apr 26, 2005, 02:45 PM	#10
skeppley 2 Turbos...Nope 1 Big one Join Date: Aug 2004 Location: Auburn PA Posts: 1,495	I will try for a measuremet marked in yellow. It will be after 5PM though Attached Thumbnails 40.5 KB · Views: 142

Apr 26, 2005, 02:57 PM	#12
StrangeRanger mugflap_dot_com Join Date: Mar 2004 Location: VT Posts: 337	Skeppley, thanks for the awesome help and pics. If your pics are taken at 0, see how much space you have under your swash, above the collar? If I'm at 0, I have no space between teh swash and collar. century MUST have Inuendo Removed something up on this bird. Typical century. j EDIT Todd, I'm using a JR 9303. I'm sure it's not a radio/servo issue. Now that I've been talking with everyone I'm convinved it must be a physical part issue. Something in the geometry just isn't right. Last edited by Fred Bronk; Apr 26, 2005 at 04:39 PM. Reason: Profanity Inuenndo

Apr 26, 2005, 04:06 PM	#14
mdttb Registered User Join Date: Jan 2004 Location: Anaheim, California Posts: 1,968	J Can you check your Settings under Swash Mix - CCPM SwashPlate Mixing and post your values. Attached Thumbnails 81.3 KB · Views: 142

Apr 26, 2005, 12:20 PM	#2
skeppley 2 Turbos...Nope 1 Big one Join Date: Aug 2004 Location: Auburn PA Posts: 1,495	What servos are you using?

Apr 26, 2005, 12:23 PM	#3
StrangeRanger mugflap_dot_com Join Date: Mar 2004 Location: VT Posts: 337	HS-55's. j

Apr 26, 2005, 01:19 PM	#4
RevGadget Registered User Join Date: Jan 2005 Location: Decatur, Al. Posts: 381	I am a newb, but how about adjusting everything on your radio to "0". Move the Tx to 50% (without batt. connected to heli). Disconnect servo arms, and install them to where the swash is mid shaft, 0 pitch on blades. Power on radio and connect batt. Adjust your swash, E points, and subtrims until servo movement is just right. Now is this possible or would this be the wrong way to go about it?

Apr 26, 2005, 02:07 PM	#5
TheDudeVT Registered User Join Date: Aug 2003 Location: Burlington VT Posts: 379	That's the right way to do it RevGadget, but I think what StrangeRanger is saying is than when he lines up the servo arms, and lines up the mixer arms, the main blades are at +9 pitch. Indicating there must be something amiss with the head geometry....

Apr 26, 2005, 02:09 PM	#6
StrangeRanger mugflap_dot_com Join Date: Mar 2004 Location: VT Posts: 337	Dude is right, the problem is that with the swash at mid-shaft, ie I have equal travel to go up and down, I'm already at +9! If I move the swash so I have 0* pitch, the swash is almost sitting on the bottom mast collar with no where left to go. j

Apr 26, 2005, 02:37 PM	#8
skeppley 2 Turbos...Nope 1 Big one Join Date: Aug 2004 Location: Auburn PA Posts: 1,495	What about the swash arms, are yours curved down like in the pic? Is it possible the small pin the holds the head on the shaft is broken, and the head slid down lower on the mainshaft, causing all the linkages to be pushed up?

Apr 26, 2005, 02:39 PM	#9
skeppley 2 Turbos...Nope 1 Big one Join Date: Aug 2004 Location: Auburn PA Posts: 1,495	Oh yeah, is it possible you have the wrong mainshaft? Maybe yours is shorter, or from the wrong bird? This could easily cause all the problems. I will get a measurement for you from the top of the collat, to the bottom of the aluminum head hub ASAP

Apr 26, 2005, 02:55 PM	#11
mdttb Registered User Join Date: Jan 2004 Location: Anaheim, California Posts: 1,968	What radio are you using ? I've got a Futaba 9C and had to go into the Swash ARF settings and adjust them to: AIL -60 ELE +60 PIT +25

Apr 26, 2005, 04:12 PM	#15
StrangeRanger mugflap_dot_com Join Date: Mar 2004 Location: VT Posts: 337	I'm not at home, but off the top of my head last night I think they were: Aiel: 60 Elev: 60 Pitch: -55 I thought of messing with that more, but that still wouldn't help or explain why in the middle of the travel range of the swash, which should be 0, I have 9. Right? j

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