700 DFC tail issue

[msallua]

70 flights here, a no vibration problems in this moment. All stock
What is the recommendation of the factory?
Will our birds should be grounded?

[Steemo]

Originally Posted by Dino Spadaccini

guys i jumped the gun with the tail gears as part the of fix, I just received and email from Align and they have a solution for the hum. Sorry for getting ahead of myself on this matter but the Fix will happen and i will update everyone as soon as i know

[Dino Spadaccini]

you should be fine as long as you dont here a hum if you do i would try a lighter set of tail blades this helps the problem \\

As i said before i did jump the gun but the latest email states they have the solution for the hum and will update when it ready sorry for the fpr the delay Dino

[msallua]

Originally Posted by Dino Spadaccini

you should be fine as long as you dont here a hum if you do i would try a lighter set of tail blades this helps the problem \\

As i said before i did jump the gun but the latest email states they have the solution for the hum and will update when it ready sorry for the fpr the delay Dino

Thanks,

Ok, I replace the stock tail blades with EDGE 105mm and no vib and no hum.

Thanks in advance.

[Nicasiobantolino]

So i think i have the hum i spooled up yesterday and when i got off the ground it just didnt sound clean hard to explane my v2 never sounded like that but sounds like i had a piece of tape from balancing or those hologram stickers they make for blade tips was fluttering but i have no tracking tape or anything on my blades it has been bugging me all night is that what everybody is hearing

[Nicasiobantolino]

so yesterday i went flying had 2 issues one that weird sound the hum and second i think i got a bad set of main blades like the weight in one blade shifted what was happening is i thought i had a bad vib so i did a bench test with no blades it was really smooth so i went flying and had a bad wobble couldnt find what it was gyro gain or a sticky tail it would just wobble like a 450 with low speed all i did that fixed was change to a set of edge mains and the wobble was gone

[Dino Spadaccini]

if you feel the main are out of spec contact tim at assurance he can set you up with an RMA on the mains

what head speed are you running on the DFC head when you saw the wobble with the align blades

562 598 4700

[Nicasiobantolino]

Not sure if they are off it was suggested to me by another pilot I'm running 1850 1950 2050 with a vbar that is showing high vibes in a hover
Just kept oscillating like the tail was doing a figure 8 and the edge 713 le fixed the prob all that is left is to put the align back on and see if it does it again but I won't fly it till the tail is fixed

[sipham]

Me too. Do you like me?






Please reply.

[sipham]

This is technical error from factory.
To align: align to have more incentives to these customers.
Very dangerous for player.

[Mystic3D]

Sounds like the new gear ratio in V3 to speed up the tail is causing resonance( the hum)? This can be fatal to metal like the tail shaft.

Slow the sucker back down and opt for longer tail blades like 115's.

Sounds like align will get it sorted in short order, lots of attention here


Sent from my iPhone using Tapatalk

[Dino Spadaccini]

Once again we know about the problem and have a solution, i will say this for the 100th time if you have the hum dont fly the hub will snap off try a lighter set of tail blades which will stop the hum we have factory pilots testing the solution.

[Bonkievan]

I know this is a long shot but does anyone have a video of the difference in sound between the 'good sounding tail' and the 'bad humming' one?

I realise that for most of you experienced guys, the sound is probably like 'night and day'.

However, the DFC is my first 700 and I have not been flying long enough, or around others, so have no real way of knowing what sounds right and what doesn't.

Kind regards,

B

[Dino Spadaccini]

if you listen to the video i posted that is a normal tail sound if you listen to the video from the guy in Vietnam that is a bad tail with a bad hum you can here it as he spools up

[Nicasiobantolino]

He posted a good video of the sound and what happens my 700e dfc is grounded until this is fixed and it would be great full not just to the ones who havnt had the tail snap off but also the ones who have had for align to replace parts for the fix for free and damaged parts to those who have had the failure.not just me but everybody has paid good money around $2000 some more some less and want it to work with no worries this is bad and dangerous guys don't fly until its fixed I won't even try different blades

[Geardaddy]

Any idea where to find the video of the tail that hums? Can't seem to locate it on here..

Thx.

[Dino Spadaccini]

its in this thread look for mine no hum

[treotraveler]

Originally Posted by Geardaddy

Any idea where to find the video of the tail that hums? Can't seem to locate it on here..

Thx.

I think what you are looking for, is this page, post #89....

https://www.helifreak.com/showthread...=445050&page=9

[Dino Spadaccini]

post 89 is a very bad hum and as you can see he wasnt sure what it was the noise and looked at the tail and spool up again not sure how many time or how long he flew like this

[Bonkievan]

Ah, ok. Thanks guys.

Mine isn't as bad as 'that' but it still doesn't sound quite right. To me at least.
I was going to put the Rail105 tail blades on to if that helps, as well as the 696 mains, but
I think I'll play it safe and not fly until we hear of a resolution of the issue from Dino/Align.

Thanks again.,

B