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HelicopterMiniature Aircraft Whiplash & Fury 55 › Fury: New Improved Torque Tube
03-11-2003 02:58 PM  14 years agoPost 21
SAL

rrVeteran

Oakville, Ontario, Canada

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eh??? did i miss something ???

Don't look like it got off track at all, d-n-jensen had a valid point that maybe the cause of the TT failure, and i was just informing him that the new kits now have a flange, so you can't make that mistake.

Had we shifted the topic to ' I think the Fury has the best looking arse, with or without a TT rod inserted' That would be classified as off-topic.
Just like you hyflyr, we all want to share info, and get to the bottom of this......

SAL

.

[color=red]SAL[/color]

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03-11-2003 03:12 PM  14 years agoPost 22
hyflyr

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Baton Rouge, LA

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My comment was not directed at you Sal. Just that the thread was at one point getting into QC issues and other problems in the Fury kits.

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03-11-2003 03:14 PM  14 years agoPost 23
FlyinBrian

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USA

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Hi,

"On all new (well recent) Xtreme kits, they have a flange now, so it makes it easy to set the boom"

Is there a guarentee the tailboom is'nt 2mm shorter than it should be or possibly the ends in the tourqe tube are'nt pushed all the way in during assembly or could the delrin adapter be machined wrong?

I am sure minair has built in a large tolerance in the new setup but they also have been known to make fairly large error's in the manufacturing process.

rappyfly, have you ever done any full collective climbouts with a fairly low headspeed (1600 or less) on that model? Just a question, dont take it as anything else.

hyflyr, You consider yourself attenitive but flew the model 3 times?

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03-11-2003 03:33 PM  14 years agoPost 24
rappyfly

rrVeteran

Toronto, ONT

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Guys

I get the reply from minair today, a new tube is on the way.

I have not done antthing less than 1600, even in normal at full climb out.

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03-11-2003 03:37 PM  14 years agoPost 25
hyflyr

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Baton Rouge, LA

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You are darn right I consider myself very attentive. First the machine was flying awesome like most Extremes do. The tail was working just not to perfection on the first flight of the day. I still get shaky on my first flight at a new field when I go to a flyin. So I was not sure if it was just me the different conditions or the bird. The heli flew ok just did not piro as well as I expected. The second flight still flew ok but the tail was just a not locking on the piro stop. That is when I called it quits. I stressed the tail on the ground and could not make it slip by holding the head and twisting the tail. I was fairly sure it must be the servo or gyro at this point so I was not going to fly it again. The third flight was not a flight. I just was testing it in a low hover since the servo and gyro ground tested ok too. When I got it 2 inches and the tail was dead I set it down and packed up. On the trip home I remembered about the other TT that failed and decided to check mine when I got home. At first the TT looked fine. The outside looked perfect. It took a good amount of twist to make it slip. I was lucky it didn't fail all at once. I was attentive and caught it before it totally broke loose.

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03-11-2003 04:40 PM  14 years agoPost 26
a_korandr

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Chicago, IL

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one more thing about assembling X-Cell's tail drive system - the dog bone end has to be greased before the installation into the derlin.

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03-11-2003 05:01 PM  14 years agoPost 27
CliffM69

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Mesa, AZ

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I disagree with the statement about greasing the dogbone, it is a metal to delrin mating, that makes it self lubricated, grease would just attract dirt and grime and make it wear out faster. think about it, do you grease your maingear?

Cliff

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03-11-2003 05:38 PM  14 years agoPost 28
a_korandr

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Chicago, IL

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Cliff,
i do not grease main gears. Main gears have different contact and friction pattern, than the dog bone inside the derlin.

Where would the dirt and grim be coming from into the T/B ? I would agreed that the main gears are exposed to the open air and i actually clean them with alcohol from time to time.

There is no dirt inside my T/Bs, so the grease (teflon based in my case) does not attract any dirt or grim. If you have any dirt/grim in your T/B i think you need to find the source of it and illuminate it.

And yet, i do not think the instructions were written by the dump people at the MA...

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03-11-2003 07:04 PM  14 years agoPost 29
CliffM69

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Mesa, AZ

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The front of the tailboom is open to the outside world, if you fly at a dirty site, this could be an issue, but since I don't feel there is any lubrication needed at this point, then this is moot, just my opinion.

I have never read the instructions, so are you saying MA says to grease this joint, I find that hard to believe if that is true.

Cliff

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03-11-2003 08:01 PM  14 years agoPost 30
CliffM69

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Mesa, AZ

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Learn something new every day, But as I have never applied grease to this joint, and have never had any problems with it either, I think I will stick with what has been working for me.

Cliff

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03-11-2003 09:33 PM  14 years agoPost 31
sluggo

rrElite Veteran

Kitchener Ont

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Auger good point on the boom thing. Even with the notch there if the boom happened to be 2 or 3mm short you still end up at the same spot as before when there was no notch to stop the boom.

hyflyr I here what you are saying but Q&A has everything to do with this. If there was more frequency checks alot of this stuff could be cought and not make it to the kits.

I really can't see how pinning the tube will cause it anymore stress or cause it to fail faster. If you look at a robbe tube drive it is a hollow arrow shaft with a hallow plastic end. The tube has a notch in the end and the plastic end has a notch in it, when you push the end on the notches fit together. Then there is a hole for a 2mm bolt which slides in and is threaded into the opposite side. The 2mm bolt is only held in buy the plastic threads on the tube end.

I had 350 flights on my robbe tube drive with no sighn of wear tell I drove it into the ground. Anyway alot of good points and info guys!

The one thing that still blows my mind about M.A is they see trouble they fix, if you call them with a problem they take care of you then and there. There is alot to be said about that.

Chris

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03-11-2003 10:52 PM  14 years agoPost 32
Ace Dude

rrProfessor

USA

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DavidH, what grease are you using on the end of the tube drive?

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03-11-2003 11:40 PM  14 years agoPost 33
Dr.Ben

rrMaster

Richmond, VA, USA

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From a common sense standpoint, I would use the grease even if your personal experience suggest it isn't necessary. Simple reason. If you EVER have trouble with that tube drive, you'll likely be asked if the ends were lubed along with another grocery list of questions, or else they'll inspect it for signs that it was. You can't expect a warranty to hold if the instructions aren't followed and a problem occurs. The maingear running without lube is a valid point, but do remember that the maingears are also teflon impregnated. If it weren't open to the environment and dirt contamination, which of course the tube drive system for the most part isn't, lubing even those maingear parts would still go a long way towards reducing long term wear and some of the gear noise.

Ben Minor

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03-12-2003 12:10 AM  14 years agoPost 34
CliffM69

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Mesa, AZ

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My equipment never makes it to a warranty repair, to many upgrade/crashes in between, and from an engineering standpoint, I still think I am right no matter what the manual says (stubborn), and every engineer has their own opinions, this is mine and I stand by it. I have been flying xcell's from the first ones and I have never had this joint fail or even wear enough to worry about since the added it, so do what you must, I will continue on with what has worked for me.

Cliff

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03-12-2003 02:35 AM  14 years agoPost 35
furyextreme

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USA

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just lube it

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03-12-2003 03:30 AM  14 years agoPost 36
CliffM69

rrApprentice

Mesa, AZ

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Lube what????

that's kind of personal don't ya think?????

Cliff

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