Pitch chanel

[myvrodrocks1]

Tried to fly yesterday. Spun up in idle up...flipped to sport and the thing just shot straight up like a bat out of hell. Lowered the collective and it just went faster. It all happened so fast. Hit TH and tried to feather it down. Plummeted like a rock. Landed in soft grass. Usual damage. Checked it over tonight. Beast settings all look good. DX8 pitch setting was reversed. How the crap can the radio reprogram itself?!? Flew just fine last week. I have a couple 450x files in the radio but if I selected the wrong one then it would not have been bound, right?

[Nelsonisms]

Originally Posted by myvrodrocks1

Tried to fly yesterday. Spun up in idle up...flipped to sport and the thing just shot straight up like a bat out of hell. Lowered the collective and it just went faster. It all happened so fast. Hit TH and tried to feather it down. Plummeted like a rock. Landed in soft grass. Usual damage. Checked it over tonight. Beast settings all look good. DX8 pitch setting was reversed. How the crap can the radio reprogram itself?!? Flew just fine last week. I have a couple 450x files in the radio but if I selected the wrong one then it would not have been bound, right?

I've heard a few anecdotal stories like that in the past about settings getting mysteriously switched on their own. It's never happened to me personally, so I've always written it off as an accidental change while they were mucking around in the servo menu. I've seen that kind of thing plenty of times too. But who really knows? I guess the moral of the story is to always do a preflight control direction check because you can never be sure.

[andycrazy]

Ive heard about it happeing on a DX6i. You cant beat a preflight check to ensure everything is operating as it should be.

[myvrodrocks1]

Also a good lesson never to spool it up in my living room again...

[trel]

GOOD LORD. IN YOUR LIVING ROOM? Wow [emoji15]


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C

[myvrodrocks1]

That was "tongue in cheek". But still smart to not do...

[myvrodrocks1]

Could I have plugged my motor in backwards causing the blades to spin the wrong way? Making up now down? I was in full control of the tail...

[puppydog_taz]

Originally Posted by myvrodrocks1

Could I have plugged my motor in backwards causing the blades to spin the wrong way? Making up now down? I was in full control of the tail...

Did you have the blade grips off recently? You may have put them on backwards with the pitch link trailing vs leading? This would make up down and down up on the 450x.

[Nelsonisms]

Viewed from above the heli the main blades should spin clockwise. In fact, it would be impossible for them to spin counter-clockwise because the one-way bearing won't allow it. So if the motor was spinning the wrong way the head wouldn't move. When viewed side on from the right side of the heli the tail blades should spin counter-clockwise. Just to be clear, the default configuration of the 450X is that the main grips are oriented with trailing edge control. The tail grips are opposite and are defaulted to leading edge control. If you install them backwards it reverses the pitch like puppydog said.

[myvrodrocks1]

I have to disagree with both of you. I know it was not the motor spinning backwards... But the one way bearing is a coupling between the main gear and tail gear, not between the motor and head. So the blades most certainly will spin the wrong way.

Also what puppydog said I also disagree with. The main blade grips do not matter. They can be installed either way and the heli flies the same.

Wait!! That's it! I put the grips on backwards! (Aluminum)

I have been going over and over grip orientation in my head and on the bench. Cyclic inputs are the same no matter what side the ball link is on. But pitch! Pitch is reversed!

Do now that I put my heli back together right, I need to reverse my radio channel again or the same thing will happen all over!

Damn!

[ManInAGarden]

So the blades most certainly will spin the wrong way.

Yes you're right - I've tried that the other day.

I have been going over and over grip orientation in my head and on the bench. Cyclic inputs are the same no matter what side the ball link is on. But pitch! Pitch is reversed!

It's strange that not everything is reversed with trailing edge blade control but it's exactly like that. Pitch up means swashplate down but nose up means front of swashplate also up.

I had to go into all that when I changed my 4503D to flybarless with a 3GX unit. I wanted to make sure that there was no surprise for the maiden flight like the heli tipping over or flipping right into my face. So I filled a whole page of paper with tiny drawings and schematics to find out.