Negative Pitch instead of positive

[flyboydx7]

Hi All,
I am new to Heli flying but have flown fixed wing for most of my adult life. I have a raptor 550E. I have set it up and went to try it out today.
It seems I have negative pitch on the blades when I should have positive. What have I done wrong?

Any help please?

Thanks
Andy

[Ian_R]

Is your swashplate moving downwards instead of upwards when you move the collective stick upwards? or are your blade grips on upside down (the link from the grip to the swashplate should be in front of the leading edge of the blade for a FBL 550e) ?

[myxiplx]

Fundamentally you've got your pitch wrong :-) As to why that happened, there are a lot of possible reasons. As mentioned above a wrong mechanical setup on the blades can reverse it. On some heli's the swash travels up for positive pitch, on others it travels down.

But then there are things you can do in the setup too such as reversing your channels. Those are harder to advise on without knowing more of your setup. Is this a flybar, or flybarless model? If flybar, what radio are you using, and if flybarless, what FBL controller do you have?

[Grumpy]

As the others have said, more information needed, especially as to if it's a flybar or flybarless heli.

A photo of the head/swash/servos would also help identify if anything mechanical is wrong.

[Phill. H]

Best thing is to check then double check with the pics in the manual that you have everything assembled correctly and everything exactly matches the pics, start at the servos and work your way up to the head checking all linkages and arms for correct orientation. Its easy to get things wrong with the mechanical set up and sometimes hard to spot so be very thorough and methodical. If thats all ok then it will most likely be that the problem will be in your radio set up.

[pug907]

My Raptor E700 is positive with the swash down, same as the blade helis. I cocked this up when I set it up, pure habit(and a mandraulic pitch gauge), rather embarrassing lol. If it's flybarred the blade links are "followers", FBL are "leaders". Reverse pitch in the Tx and make sure everything else works as it should. My 2 penneth

[tomatwalden]

As others have said, positive pitch is usually a result of the swash moving upwards. This means that the pitch links should be LEADING the blades. If you've connected the pitch links such that they are BEHIND the trailing edge of the blades, that will result in wrong behaviour.

If it is setup mechanically correct - reverse the pitch channel in your TX

[flyboydx7]

Hi All, and thanks for all the feedback.
I bought this Heli used and so did not get the Manual with it. it is the fly barred Version. after reading the posts I have reversed channels 2,3 and 6 this has given me a level swash plate but now the swash plate travels downward and I do indeed have positive pitch

for information as some of you asked I am using a JR DSX11

Regards
Andy

[Grumpy]

Just make sure that the cyclics move the correct way now, ie swash tilts in the direction of stick movement.

[ian17]

My Raptor E700 is positive with the swash down, same as the blade helis. I cocked this up when I set it up, pure habit(and a mandraulic pitch gauge), rather embarrassing lol. If it's flybarred the blade links are "followers", FBL are "leaders". Reverse pitch in the Tx and make sure everything else works as it should. My 2 penneth

+1
Must be a thunder tiger thing ,because mini titan is the same and is correct.

Ian

[Mark_T]

Check the pitch curves as well, I'm guess you might not have done that already or you'd have spotted the negative pitch on the bench.

[Phill. H]

As Grumpy says check your cyclics are still correct, if they were ok before but not now you may have to go to your previous set up and alter the swash mix, ie +60 becomes -60 or whatever the figure is in your Tx this should reverse the pitch control.

[Grumpy]

...you may have to go to your previous set up and alter the swash mix, ie +60 becomes -60 or whatever the figure is in your Tx this should reverse the pitch control.

+1 on that. If all you wanted to do was reverse the collective and leave the cyclic alone then you should have reversed the collective in the swash menu, not reversed the servos.

[flyboydx7]

Thanks again everyone, you are all correct I have the wrong movement on the swash. I am going to try your ideas out in a short while and will feed back.

Cheers Andy

[Phill. H]

Thanks again everyone, you are all correct I have the wrong movement on the swash. I am going to try your ideas out in a short while and will feed back.

Cheers Andy

Andy !I'm not knocking you here as we all had to start off somewhere but it sounds like your heli setting up knowledge is a bit limited and your best bet is to go to your local heli club and get it checked over before you fly it or it will end up more than likely being costly and in disaster. How much actual heli flying have you done ?