need some help with trex 450 pro head

[james and]

this is my 3rd fix on a trex 450 head both times the screws keep snapping in the FEATHERING SPINDLE is it cos the scews are to tight or to loose or somthing completely different , i am new to the hobby and need some help on this ????

[Stanley Speel]

I am assuming that you mean the feathering shaft screws are snapping in flight, causing a crash. This is almost certainly that the head has not been assembled correctly. I had this happen 2 times on my Gaui X2 (the actual feathering shaft would snap in flight). I bought a new head from FL and the problem went away.

I'd suggest either buying a complete new head (they're not that expensive), or completely disassemble the head (so take the bearings out of the grips etc) and reassemble it according to the instructions, making sure all the washers are in place correctly and the bearings are facing the right way round.

[james and]

thanks for the info i must be doing somthing wrong cos i have completely taken the head apart twice

[Stanley Speel]

so are you flying it and mid-flight a blade grip flies off?

[james and]

been lucky 2nd time i was just about to take off and the blade grip flies off

[Stanley Speel]

OK that's almost certainly a problem with the head setup (or you haven't loctited the screws, but this would make the screws come out not snap).

[james and]

snapped on both side will try and get some one to have a look b4 i do it again thanks for all your help

[Syclick]

I have never had that happen. Not even in the many crashes my 450s have had.

The only possibilities I can think of is:
Faulty screws - unlikely. Especially if they Align or similar quality.
Seriously overtightened screws - more likely. They only need to be nipped tight with smear of blue locktite/threadlock on the first couple of turns of the thread.

Or - as said above - something drastically wrong with the head set up. But I can't imagine what !

You are using standard length blades I assume? 325 or 335 mm?

[james and]

using ripmax 360 mm blades from midlands is this the problem ???/

[muscleflex]

^^ are you using an extended boom?
i would have thought 360 would be way too long and will hit the tail blades?

[james and]

must have no way near the tail blades , lol

[Syclick]

Even 335 mm is pushing it with a 450 IMHO. High chance of a boom strike if nothing else.

I would suggest the size is your problem. Try 325s - as the Trex 450 is designed for.
Theres a huge amount of centrifugal force involved.

[james and]

sorry just look at size the new one is 360mm the old one a lot shorter think i will be sending them back