Today as i check propelers as a preflight check i realized that one prop was moving a litle when on the motor just a tick not too much so i tried another one with the same problem....Then i realize that one of the 2 screw down of the propeler witch screws the propeller clip ant the motor was not tight at all.....so i tight it put the prop and not the slightest move at all...

Thanks for sharing this with us.  adding this to my preflight checklist.

Sparky_17 Posted at 2017-8-21 05:55
Thanks for sharing this with us.  adding this to my preflight checklist.

Maybe this little detail is causing all these problems. Imagine a unit with more screws untight.That may cause mid flight off or other bad behaviors .

Adding this to my preflight checklist, Thanks for share!

Can you please, share the tool you use for the screws ?

Anuvis Posted at 2017-8-21 05:58
Maybe this little detail is causing all these problems. Imagine a unit with more screws untight.That may cause mid flight off or other bad behaviors .

Its perfectly possible. I will check my screws now (and propellers feet).

Looks like a 1.5 mm allen head

I had never a crash or anything else hard land etc....I check the propellers and saw that one screw was not tight because prop when on was a slight tick moving ...Is it possible to un tight in flights or it came from factory...I dont know .I know for sure that the small almost not viewable vibration that the drone had in hovering is now gone ... Just imagine units that have more screws un tight they fly and during flight these screws un tight more ...this i am pretty sure can cause a mid-flight off

LOKY Posted at 2017-8-21 06:01
Can you please, share the tool you use for the screws ?

I would say its Torx

https://en.wikipedia.org/wiki/Torx

S-e-ven Posted at 2017-8-21 06:20
I would say its Torx

https://en.wikipedia.org/wiki/Torx

Thanks! Looks like, size ? TX = ?

OMG!... 4 screws not tied!...

Thanks for the heads up.

lafoto Posted at 2017-8-21 06:24
OMG!... 4 screws not tied!...

This is getting serious....

How a tied and not tied screw on Spark should look like? anybody take photos of untight screw? I dont want to over tight the screw and end loosing a motor.

STech - Hathder Posted at 2017-8-21 06:33
How a tied and not tied screw on Spark should look like? anybody take photos of untight screw? I dont want to over tight the screw and end loosing a motor.

I tight the screw with little force .Just with a little force until the screw driver stops in the lightest force.It is just in your hand you will understand.... BE CAREFOUL NOT OVER TIGHT IT MAY BREAK THE MOTOR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

lafoto Posted at 2017-8-21 06:24
OMG!... 4 screws not tied!...

TORX number ?

STech - Hathder Posted at 2017-8-21 06:33
How a tied and not tied screw on Spark should look like? anybody take photos of untight screw? I dont want to over tight the screw and end loosing a motor.

I had 4 that with minor force did tight a bit more!...

LOKY Posted at 2017-8-21 06:53
TORX number ?

I had a kit from apple... i don't know the TORX number, sorry...

This is the tool I use

LOKY Posted at 2017-8-21 06:53
TORX number ?

The tool i used is T6x40 you can see it in my photo up

Anuvis Posted at 2017-8-21 07:05
The tool i used is T6x40 you can see it in my photo up

Thanks for the update !

Metal screws in metal must always have a little threadlocker (glue, i.e. lock-tite), at least in the rc helicopter hobby, where I come from.
Was’nt there any threadlocker?
Is it safe to remove the screws to have a look at them?

heliman Posted at 2017-8-21 07:56
Metal screws in metal must always have a little threadlocker (glue, i.e. lock-tite), at least in the rc helicopter hobby, where I come from.
Was’nt there any threadlocker?
Is it safe to remove the screws to have a look at them?

it would probably void your warranty and i wouldn't take them all the way off but just to loosen and look at them shouldn't hurt.

Anuvis Posted at 2017-8-21 07:05
The tool i used is T6x40 you can see it in my photo up

Anuvis - thanks for this very practical info; I like your way of checking the AC before flying properly; I too found one screw slightly unloosen just when unpacking the new AC month ago;
What about to add information about the tool into your first post in this thread for anybody to see what tool they shall to use? Just an idea.

Reminds me i better check all of mine since i have had them all apart from the drone ....