Marius' learning to fly - "video diary"

[stokke]

Had a bunch of flight today with both the 450 and the 600. Used the new camera, but I had the bracket angled too low, so all the videos were of the ground LOL

The 450 seemed to work nicely through three packs - but at the end of the third pack the motor couldn't keep the RPM at a constant... It was as if I was in Normal mode, and going up and down on the throttle (even though it was in IU and the throttle was not touched). I switched to Normal mode, but the fluctuating RPM was still noticeable. I was concerned that the motor had taken a hit, as the pinion had been showed inwards on the shaft during my last crash. So - new motor is on it's way.

On my last flight with the 600 I noticed a vibrating tail, and a strange sound. Since then, I redid the tail gear mesh and I also redid the tail setup in the BeastX. I hoped this would solve my problems...it did not. Well the noise had been replaced by a new noise, but the vibrating tail was still the same. I have checked everything I can think of, but did notice that the tail auto gear is sort of warped. A new gear will be underway soon.

I really hope I get all the kinks out of this 600 soon.

 

[coolgabsi]

My tail fin was vibrating hard because of two reasons on two seperate times:

My feathering spindle was off by half a degre not enough to cause blade tracking issue but enough to cause vibration

Second was my blades not balanced. I don't remember which ones you are running, but sometimes that happens.

Check that just in case

Fly safe!! have fun!

 

[stokke]

My tail fin was vibrating hard because of two reasons on two seperate times:

My feathering spindle was off by half a degre not enough to cause blade tracking issue but enough to cause vibration

Second was my blades not balanced. I don't remember which ones you are running, but sometimes that happens.

Check that just in case

Fly safe!! have fun!

I have checked for tracking, balanced blades and weighed the blades as well. They're Radix btw. I'll check into the feathering shaft. Thanx Gaba

 

[stokke]

I just took of the tail and main blades, then spooled her up. The head seems to be perfectly balanced. I'll have another look at the blades, though I do not think I'll find anything new. If the new auto gear don't fix the vibration, I'm sure there's something with the FBL that needs adjusting.

 

[Lee]

Are you sure its not just the pinion slipping? Fluctuating RPMs. Thats the first thing i'd check if you say it was pushed in on the last crash.

 

[stokke]

Are you sure its not just the pinion slipping? Fluctuating RPMs. Thats the first thing i'd check if you say it was pushed in on the last crash.

Crap... I'll check - I sort of hope you're not right

 

[Lee]

Or the One way bearing is shot.

 

[stokke]

You were right Lee. It's slipping on the shaft... I'll call the shop tomorrow morning - hopefully they haven't gotten around to ship it yet. Thanks Lee - you just saved me 73 bucks

 

[Lee]

Re: Marius' learning to fly - "video diary"

hahaha I take 50% Commission

- - - Updated - - -

Just glad we found out before you got the new motor.

 

[stokke]

Re: Marius' learning to fly - "video diary"

hahaha I take 50% Commission

- - - Updated - - -

Just glad we found out before you got the new motor.

Me too buddy. I'll grind a flat spot this time - don't want this to happen later on.

Thanks again

 

[Tony]

I thought the 450MX had a flat spot? Hm.

 

[stokke]

I thought the 450MX had a flat spot? Hm.

No flat spot on mine. But I think you mentioned this in my 450 bulid thread - that you had a flat spot on yours, and it wasn't on mine...?

 

[Lee]

Just wrap the motor up well so you don't get any metal filings in the can. Did you manage to stop the postage of the other motor?

 

[stokke]

Just wrap the motor up well so you don't get any metal filings in the can. Did you manage to stop the postage of the other motor?

Uuuuuh, now why couldn't you say that last night? LOL We'll just cross our fingers and hope the motor is filing free Yes, I managed to stop it. I should note that when I took out the motor, I had a hard time getting the pinion off the shaft...? Anyways, the pinion is on there now - tight! I checked the one way bearing as well, and it's functioning as it should - well it ought to, it's brand new!

LOL You'll get an update tomorrow.

 

[Tony]

The good thing about brushless motors is you don't have to worry about the filings as much as you did on the brushed motors. If you got any in there, they would stick to the magnets which when running would be slung to the outside so it would always be away from the windings. Worst it will do is put some scuffs on the laminations and magnets or you may get one in the bearings. Either way, it's still easy to clean out.

 

[coolgabsi]

Nice catch there



And tony... Even my scorpion 4035-560 stock shaft had no flat spot...

The new shaft is gonna have it (100mm one)

Fly safe!! have fun!

 

[Tony]

Not sure what that means. I was just referring to the one that I had. I am pretty sure it had a flat spot on it...

 

[stokke]

OK. I was just down at a lit up parking lot (it's 11.30 PM) and tested both the 450 and the 600.

I have no idea how I fixed the tail vibration, but the 600 seemed to be good. I lengthened the tail rod one turn, redid the tail end points. Turned up the no.1 pot on the FBL. Made sure the tail blades were not tight at all. I also checked everything I could think of. So it looks like I fixed it...somehow...?

The fluctuating RPM in IU is gone on the 450. But the FBL was all messed up - so I'll probably have to check the swash and redo the DIR.

All in all - everything looks OK

 

[Lee]

Sweet. Glad everything is working ok now.

 

[Tony]

So are we going to get to see some thrashing of the 600 now?