Raptor G4 - Servo Support Failure

[KnifeEdge]

All,

One to watch out for! This happened today to a G4. He was only flying smooth and it probably had about 10 flights.

Fortunately it was flying ok and it was only noticed when it was landed.

Nice heli though, it has a 120 in it and is very smooth!!!!!!

[Jamin_00]

Yea, John showed me this when I got to the field.

The amount of materal left each IDE f the screws is minimal but I'm still surprised it broke.

[KnifeEdge]

here is a pic of it the other day.

[robocow]

'its a pretty bird.

[jwatts007]

So lucky could have lost it, I did not know there was a problem until I landed it, spares are going to be hard to get hold of I think, Johnny boy has a friend who will make me one, a beefed up version I hope..........

[Jamin_00]

Gutted I could not see it fly with the 120 John but will it be ready for next weekend you think?

[jwatts007]

Hope so Ben I want you too have a little go, its a lovely heli too fly and the 120 is a very nice engine, shame as it was running nice for the 2 flights it had today, Lee had his over there today and he is over the moon with his as well, he would like too join us next week as well, he has all futaba gear on his.............

[Jamin_00]

Can't remember the last time I flew a nitro lol

[WildWake]

John have a look ... I've found your part..

this seller has 106 Raptor G4 parts

Thunder Tiger Tail Servo Mount Raptor G4 TTRPV1574 | eBay
eBay, Phil's hobby store, go to his shop,
click heli's then search his shop for "G4" (CLICK THE BOX UNDER THE SEARCH BAR " include in the title").
hope this helps you get back in the air mate..

[jwatts007]

I will contact him to see if it is the right part, the TT part no is BK3185, hopefully Johns friend will be able to make a better one than the TT piece, with any luck should be back in the air very soon..........P.S thanks Tye but that is for a tail servo mount, I will contact the place I got it too see if they have any spares yet..............

[Zeeflyboy]

I do wonder about this....

I mean that looks like a classic failure of metal fatigue... No crash, just repeated cycles of stress and eventually it fractures. The fact it was after so few flights suggests there was a flaw in the metal or machining but the point remains:

How often we should replace parts even if they aren't crash damaged. Especially high load items such as blade grip bolts etc.

Glad you got it down!

[jwatts007]

Looked all over for the part. have found it on tower hobbies web site available late December, how mad is that............

[electricsceadu]

would it be possible for a g4 owner to measure the boom diameter as i'm toying with the idea of using the g4 tail gear box on a rappy 90 when i run out of tail gears that are always out of stock

[jwatts007]

25.34 mm is the reading I am getting, compared to the 25.70 for the ali boom on the 3D, the helical gears of the G4 should be better as well, nice and quiet......P.S the gears might just replace the old ones without the need to get the new gear box, also the clutch is the same size as the old version....

[Si Goodchild]

More likely to be a material flaw or stress induced cracking when alloy billet was made at the foundry or machined - I'm guessing this part is not cast. Trouble is, if that's the case, what other parts are suspect?

Damned pretty heli, though.