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HomeAircraftHelicopterMiniature Aircraft Whiplash & Fury 55 › First Stratus crash - stripped tail gears
04-05-2010 04:09 PM  8 years agoPost 1
Dr.Phil

rrApprentice

Oslo, Norway

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I have enjoyed my flybarless Stratus for a while now.
After 75 flights, it went down

Going in to a chaos after a tail slide the heli made this loud "gear-crunching" noise. Managed to flip thr. hold and landed on the side in some deep snow. Only damages is skids, blades and gears of course.

Are stripped tail gears a known problem on the Stratus? The gears have looked ok all the time before this. No dust or noise that I have noticed before this either


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-05-2010 04:21 PM  8 years agoPost 2
Doublah

rrKey Veteran

USA

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Yeah, especially in cold weather. They have the new ones out that I suggest you get. One is metal now and the other is a really strong white Delrin. You will also need the gear changing tool.

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04-05-2010 08:00 PM  8 years agoPost 3
Dr.Phil

rrApprentice

Oslo, Norway

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Thanks!

I guess the kit I got was from one of the earlier batch?
I got the o-rings instead of the ordinary head dampeners, and the old plastic tail gears.

Do you have the product numbers for the new gears?
Any other improvements that have been made to the Stratus that I should consider?


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-05-2010 08:35 PM  8 years agoPost 4
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Ouch!!

These gears stripped spontaneously (i.e. you never hit the tail in the dirt)?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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04-05-2010 08:44 PM  8 years agoPost 5
Dr.Phil

rrApprentice

Oslo, Norway

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Yes, Justin
This happened about 5 meters in the air


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-05-2010 09:20 PM  8 years agoPost 6
Dr.Phil

rrApprentice

Oslo, Norway

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Is this the the one ?[url=http://www.newenglandheli.com/machinedgearsetforopencase.aspx]

Anybody know where I can find this in stock?
What is the gear changing tool you mentioned and where can I buy one?


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-06-2010 02:14 AM  8 years agoPost 7
P Johnston

rrVeteran

Ann Arbor MI

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you need

MA123-96 gear set
MA3000-40 tale rotor service tool

I'm not familiar with V-bar but you need to put some type of delay or a slight drift stop in the tail to prevent hard stops that kill the gears.

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04-06-2010 04:55 PM  8 years agoPost 8
Dr.Phil

rrApprentice

Oslo, Norway

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Thanks.
Just talked to a guy at my local hobby shop and he told me that this service tool is not required to change gears.
What does this tool actually do?


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-06-2010 06:19 PM  8 years agoPost 9
NOLONGERFLYING

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Scottsdale, AZ

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I asssume it removes the pin??? Just a guess

Team MyColdHardCash

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04-06-2010 07:01 PM  8 years agoPost 10
BisonFlyer

rrKey Veteran

Winter Garden, FL

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It is not required, it just makes it a lot easier. It allows u to remove the roll pin without struggling and to insert the new one easily. Its a nice little tool to have, but you don't need it to make the repair.

Art Hughes
SAB Heli Division~Byron Fuels~Mikado V-Team~Scorpion~Pulse~Xpert Servo~Kontronik Drives

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04-06-2010 08:03 PM  8 years agoPost 11
Dr.Phil

rrApprentice

Oslo, Norway

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Thank you!
Reason I ask i that my LHS do not have this tool and I want to get the Stratus in air as soon as possible


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-06-2010 08:44 PM  8 years agoPost 12
Knud Pedersen

rrKey Veteran

Denmark - Europe

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Tail gear tool
Hi

Check this out: I made my own tailgear remove tool
https://rc.runryder.com/t534525p1/?p=4405768#RR

ChopperKnud
Team Miniature Aircraft
ThePitchbrothers

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04-07-2010 03:06 AM  8 years agoPost 13
nabi

rrApprentice

Holmdel, NJ (central)

My Posts: All  Forum  Topic

I have enjoyed my flybarless Stratus for a while now.
After 75 flights, it went down

Going in to a chaos after a tail slide the heli made this loud "gear-crunching" noise. Managed to flip thr. hold and landed on the side in some deep snow. Only damages is skids, blades and gears of course.

Are stripped tail gears a known problem on the Stratus? The gears have looked ok all the time before this. No dust or noise that I have noticed before this either
Philip,

I would get the upgraded tail gears, one is metal, the other is delrin (white) - they will last much better.

here is what they look like:
http://grandrc.com/inc/sdetail/125064

cheers,
Nabi.

______________
Stratus/YS91
Goblin 700 Nitro/YS96/Hatori/Xpert R2's/Vbar Neo/VControl Touch

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04-07-2010 12:25 PM  8 years agoPost 14
Dr.Phil

rrApprentice

Oslo, Norway

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Nabi, thanks. yes, those were the one I ordered

Knud, Thanks. Great idea! I'll try to make one of my own. Not to save money, but to save time. The gears should be in my mailbox today


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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04-08-2010 01:46 AM  8 years agoPost 15
BisonFlyer

rrKey Veteran

Winter Garden, FL

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just remember to mesh them so they have zero backlash, but still rotate without any real resistance. If anything, a little on the snug side is better than loose. I normally run mine just slightly on the tight side for a brand new set. After a few flights they run in together, and I normally dont have to remesh. Check ur mesh after about 5-6 flights, and remove any backlash that might have developed during the break-in period. after doing that once, u should be all set.

Art Hughes
SAB Heli Division~Byron Fuels~Mikado V-Team~Scorpion~Pulse~Xpert Servo~Kontronik Drives

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04-14-2010 02:41 AM  8 years agoPost 16
wjvail

rrKey Veteran

Meridian, Mississippi

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http://helifreak.com/showthread.php?t=190023

Been there... Done that... Except I got mine down in one piece and there was no doubt the gears striped in flight.

Bill

"Well, Nothing bad can happen now."

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04-19-2010 02:23 PM  8 years agoPost 17
marc8090

rrElite Veteran

Long Island, N.Y.

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Mine did the exact same thing when I had it, and yes, it does happen in flight. Has nothing to do with touching the ground. Make sure you have some delay set in your gyro because the delrin gears are stronger, but not indestructible.

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