New T-rex 600 nitro falls from sky

Be sure to check your setscrew on the tail rotor as this pilot almost lost it during it's maiden flight. Thank god an experienced pilot was at the helm.

The 600N was on its maiden with Hos at the controls. All was going well until 2:18 into the video when you can see the heli begin to pirouette to the left.

Right about the same time Hos indicated he has lost T/R control followed by saying "Andy you need to take this".

I indicated "throttle hold and auto it in!".

Hos replied "I can't, you need to take this!"

Hos passed the DX7 over to me at about 2:23. I remember not doing anything for little bit of time, felt like several seconds as I focused on the heli. At 2:24.5 I hit t-hold and you see the heli descends sharply.

Coincidentally, when I hit the t-hold the heli stopped pirouetting and from there it was pretty much a normal auto.

We found the cause to be the tail hub slid inward on the T/R output shaft toward the tail case. Apparently, as this happens, it applies left T/R input.

andy-

Category:

Education

Tags:

• T-rex
• 600
• nitro
• maiden
• flight
• near
• crash
• tail
• rotor
• setscrew

[RcAntax]

That could have turn out reall bad..

Nice saving though! By the way, how does a auto rotation landing work?

[tivopro]

Funny you should ask. I have not done one intentionally yet, but I'm told that you hit the throttle hold and give negative pitch and glide her in to land. This causes the heli to use the rotation of the blades to slow down the descent. Interesting to watch and scary to try!

[tivopro]

I had to do an autorotation today unintentional when my Hawk flamed out. It landed in one piece without incident which I was very fortunate since it was only my second autorotation (both unintentional). It was up about 50 feet when it happened.  Carbuerator came loose!

[RcAntax]

Oh, I´m glad it survived:) Was it something wrong with the engine or did it just stop?

I wonder if i can make a auto with my belt-cp..

[tivopro]

The carburator guide screw backed out leaving an exposed hole where the fuel flows. This causes some fuel to escape and allows the engine to run lean, throwing off the air/fuel mixture.. i.e. less amount of fuel.

Preflight inspection didn't catch this, but I added more loctite to these screws now.

Very lucky it had enough headspeed to make it down safely.

I think your belt-cp would be hard because of the lack of headspeed to do an auto, but you could try from a few feet up and see.

[dannne82]

nice



[azezrtyuuiopqsdfghjk]

Oh No crash I am so sad!!!

[ThelastSano]

Wow when it goes hurdling towards the ground it sounds like low on fuel.

[kiethjason]

Autorotations mate, auto-bloody-rotations! Can't stress the importance of learning it.

[mynameisliamhahahaha]

nah not luck...SKILL... lol

[bowmaaker]

waaaaay too lean.

[pHeliXChrisq]

that was no fall, that was only not good fly !

[jhoexp]

it was lean from the beginning!

[prttimeninja]

Beautiful save. This is why I always do 3 auto rotations before staring off my flying day.

[shockflyyer3d]

thats why i like electric