Register Now

mike_drz · 10-10-2015, 03:43 PM

It's long overdue but I had my first crash on the 450 today, due to mech failure. The tail let go because the tail slider bushing unscrewed.

The tail sounded funny for 1 second and then it just started to piro like mad. I hit TH and tried to keep it level. It came down hard and broke the landing gear but everything else looks ok.

All the piroflip practice really helped to keep the disk level. My collective management still needs some work before I try autos though. lol

salrica · 10-10-2015, 05:39 PM

Quote:

Originally Posted by mike_drz

It's long overdue but I had my first crash on the 450 today, due to mech failure. The tail let go because the tail slider bushing unscrewed.

The tail sounded funny for 1 second and then it just started to piro like mad. I hit TH and tried to keep it level. It came down hard and broke the landing gear but everything else looks ok.

All the piroflip practice really helped to keep the disk level. My collective management still needs some work before I try autos though. lol

And there still people greasing / oiling tail parts.
Sealed bearings and what not.
Not saying that this is the case, but that's what exactly happened to me.

Any damage?

mike_drz · 10-10-2015, 05:54 PM

Oh it was totally my bad. I took the tail apart during the build to make sure everything was good, and I crushed the busing b/c it is made of thin brass and bends if you look at it the wrong way. I replaced it with another one that was too short.

I couldn't find it locally and didn't want to wait weeks/months.

mike_drz · 10-10-2015, 06:00 PM

No major damage. Broaken skids. The blades didn't even get dirty, aside from the bug guts, they are clean.

dogbreath · 10-11-2015, 07:20 AM

The tail shaft looks bent to me. Just to the left of the slider the assembly doesn't look parallel to the slider. It could be a camera perspective thing. Check it out for sure.

Dan

mike_drz · 10-11-2015, 07:45 AM

It wasn't spining when it crashed. I think it just looks that way because the slider is loose and hanging there without the slide bushing being screwed in.

CrashNburn420 · 10-11-2015, 08:41 AM

It does look bent in the picture but it could just because it's not all assembled. Those shafts do bend pretty easy though, same with the feathering shaft. Minor accidents with the 450 can easily kill the TT gears, main shaft & feathering shaft.

mike_drz · 10-11-2015, 09:07 AM

I ordered what is hopefully the right sized bushing. I'll take the tail shaft out to take a closer look. Here's a pic with the slider off.

alyon187 · 10-11-2015, 08:05 PM

The correct bushing for the 450 model (pro and L) is the one w more threads on the end the slider. The older ones have less threads.

http://www.aligntrexstore.com/450-Ta...XX_p_2148.html

mike_drz · 10-12-2015, 08:21 AM

Quote:

Originally Posted by alyon187

The correct bushing for the 450 model (pro and L) is the one w more threads on the end the slider. The older ones have less threads.

http://www.aligntrexstore.com/450-Ta...XX_p_2148.html

Awesome, this is what I bought. I think I even bought the right one the first time but rotorquest may have sent me the wrong one.

dogbreath · 10-12-2015, 10:40 PM

It looks straight now. I had an assembly come bent (just a bit) form China, and I spent a lot of time balancing blades etc before ordering new shafts. immediate fix. Running it with no blades on didn't show the vibes.

Dan

mike_drz · 10-25-2015, 08:22 AM

I think you guys might be right about the tail shaft being bent. I just put things back together with new bearings and the umbrella gears are notchy and binding in spots.

Wow good eye being able to tell from a pic. I'll have to spend another 20 bucks to see if a new one fixes it.

CrashNburn420 · 10-25-2015, 10:28 AM

Damage to the gears will cause that notchy feeling sometimes. Like if you rotate the gears really slowly by hand you will feel them bind in certain spots. It can be hard to see the damage on the tooth sometimes. TT gears can usually get trashed in a crash.

mike_drz · 10-25-2015, 10:51 AM

the gears all look really nice. They turn really smooth until a certain point where it binds and needs a quite a bit of force to keep going. I think the tail was already this way after a tip over a while back. I just never noticed it because it spins fine with the mass of the main blades. Even then now that i think back the main blades would get stuck when spinning them slowly by hand.

mike_drz · 10-25-2015, 01:17 PM

The umbrella gear from the TT poped out causing a tight mesh. I popped it back in and it smooth now.

10-10-2015, 03:43 PM	#1 (permalink)
mike_drz Registered Users Join Date: Jul 2013	First real crash today. It's long overdue but I had my first crash on the 450 today, due to mech failure. The tail let go because the tail slider bushing unscrewed. The tail sounded funny for 1 second and then it just started to piro like mad. I hit TH and tried to keep it level. It came down hard and broke the landing gear but everything else looks ok. All the piroflip practice really helped to keep the disk level. My collective management still needs some work before I try autos though. lol Attached Thumbnails

10-11-2015, 07:20 AM	#5 (permalink)
dogbreath Registered Users Join Date: Dec 2006	The tail shaft looks bent to me. Just to the left of the slider the assembly doesn't look parallel to the slider. It could be a camera perspective thing. Check it out for sure. Dan __________________ No-Team; Non-Rep, no-skill. Free advice worth every penny.

10-11-2015, 08:05 PM	#9 (permalink)
alyon187 Registered Users Join Date: Feb 2015	The correct bushing for the 450 model (pro and L) is the one w more threads on the end the slider. The older ones have less threads. http://www.aligntrexstore.com/450-Ta...XX_p_2148.html __________________ Goblin 380 (Spirit), X3 (VBAR), DX9 (I.Y.A.O.Y.A.S.)

10-12-2015, 10:40 PM	#11 (permalink)
dogbreath Registered Users Join Date: Dec 2006	It looks straight now. I had an assembly come bent (just a bit) form China, and I spent a lot of time balancing blades etc before ordering new shafts. immediate fix. Running it with no blades on didn't show the vibes. Dan __________________ No-Team; Non-Rep, no-skill. Free advice worth every penny.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

10-10-2015, 05:54 PM	#3 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	Oh it was totally my bad. I took the tail apart during the build to make sure everything was good, and I crushed the busing b/c it is made of thin brass and bends if you look at it the wrong way. I replaced it with another one that was too short. I couldn't find it locally and didn't want to wait weeks/months.

10-10-2015, 06:00 PM	#4 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	No major damage. Broaken skids. The blades didn't even get dirty, aside from the bug guts, they are clean.

10-11-2015, 07:45 AM	#6 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	It wasn't spining when it crashed. I think it just looks that way because the slider is loose and hanging there without the slide bushing being screwed in.

10-11-2015, 08:41 AM	#7 (permalink)
CrashNburn420 Registered Users Join Date: May 2012	It does look bent in the picture but it could just because it's not all assembled. Those shafts do bend pretty easy though, same with the feathering shaft. Minor accidents with the 450 can easily kill the TT gears, main shaft & feathering shaft.

10-11-2015, 09:07 AM	#8 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	I ordered what is hopefully the right sized bushing. I'll take the tail shaft out to take a closer look. Here's a pic with the slider off.

10-25-2015, 08:22 AM	#12 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	I think you guys might be right about the tail shaft being bent. I just put things back together with new bearings and the umbrella gears are notchy and binding in spots. Wow good eye being able to tell from a pic. I'll have to spend another 20 bucks to see if a new one fixes it.

10-25-2015, 10:28 AM	#13 (permalink)
CrashNburn420 Registered Users Join Date: May 2012	Damage to the gears will cause that notchy feeling sometimes. Like if you rotate the gears really slowly by hand you will feel them bind in certain spots. It can be hard to see the damage on the tooth sometimes. TT gears can usually get trashed in a crash.

10-25-2015, 10:51 AM	#14 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	the gears all look really nice. They turn really smooth until a certain point where it binds and needs a quite a bit of force to keep going. I think the tail was already this way after a tip over a while back. I just never noticed it because it spins fine with the mass of the main blades. Even then now that i think back the main blades would get stuck when spinning them slowly by hand.

10-25-2015, 01:17 PM	#15 (permalink)
mike_drz Registered Users Thread Starter Join Date: Jul 2013	The umbrella gear from the TT poped out causing a tight mesh. I popped it back in and it smooth now.

Register Now

Log-in