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HelicopterHIROBOOther › Sceadu EVO 50 ARF factory assembly problems?
12-20-2003 05:13 PM  13 years agoPost 1
DJGrogan

rrNovice

Highland Village, TX

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Don't get me wrong...I love my Hirobos (Freya 90 & Sceadu EVO 50), but I am curious if anyone else has had a similar situation.
Keep in mind that this is only the second helicopter I have owned, so I don't claim to be any type of expert.
I purchased the Sceadu EVO 50 ARF. During assembly, I noticed the tail blade holders were very loose (at least much more loose than the ones I assembled on my Freya). But, being the trusting soul that I am, I reasoned that the Hirobo factory must know better than I what is too loose or not? Right!? During the first flight, I noticed the tail was vibrating quite a bit. My initial assumption was gyro sensitivity. After serveral adjustments, and rechecking the mechanical linkage, I decided to disassemble the tail blade holders to see if there was any way to tighten things up a bit. What I found was the bearings were literally glued to the "SE Tail Housing" (what looks like it should be called a tail blade holder shaft to me). In attempting to remove the bearings, it destroyed one of them (they had been glued to the SE Tail Housing!...not just loctite). Then after removing the set screw, I attempted to remove the SE Tail Housing from the Tail Pulley Shaft. This resulted in bending the Tail Housing shaft (it was also glued! to the shaft.) I purchase a new Tail Housing Set, which was much tighter than the original, and everything now works great!
My leason learned was...if you want it done right...do it yourself! More importantly though, I would think Hirobo would not want to let something like that leave the factory for liability sake if nothing else!
Possibly the heli ARF's are going through the same growing pains that the airplane ARF's went through. Many airplane ARF kits are now excellent quality compaired to their first attempts, so maybe there is hope for helis also, but I have personally sworn them off. Has anyone else had any similar problems with the Sceadu ARF, or other ARFs?

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12-20-2003 05:28 PM  13 years agoPost 2
fitenfyr

rrProfessor

Port Orchard, Washington

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Well when you pay someone .25 an hour to build it..
Glue looks just like Loctite.
I assume this was purchased overseas?
One of the reasons I stick with the US kits especially with Hirobo is the support MRC gives us.
Not trying to start the great "Grey" wars again, but.....
If that had been an imported kit (wouldn't have been ARF then. )
Jeff would have taken care of the problem.
Most of the ARF helis I have seen usually have some sort of "problem" or something built to less of a standard than most of us like.
I don't/won't buy ARF kits for that reason. If I get it built then I usually tear it apart anyhow.
You are correct with airplanes though. You just can't beat most of the ARF's in the plank world these days.

Jason Stiffey
Fly Fast....Live Slow...

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12-20-2003 06:04 PM  13 years agoPost 3
mrNoodles

rrProfessor

Borlänge, Sweden

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Remember that there´s plenty of side to side play on the holders when moving the blade tips. The EVO does not use as same tailbladeholders as the Freya which uses 3 bearings with a thrust bearing in the middle.
This side to side play is normal.

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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12-20-2003 07:53 PM  13 years agoPost 4
DJGrogan

rrNovice

Highland Village, TX

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Blade holder side play

As I said, I'm not an expert. I did notice that the blade holders on the Freya are different parts, however, I just thought there might be some similarity in fit and tollerances. What ever "normal" is, the original blade holders were definately much looser than the replacements, and it did solve the vibration problem, so my guess is that something wasn't right. The other point I wanted to emphasize was the use of some sort of glue to secure the bearings and Tail Housing. I just find it hard to believe this is standard assembly practice. I'm guessing, but I could imagine a situation where they noticed things were unusually loose at the factory, and this was their sollution to "get it out the door"?
Again, I love the Hirobo products when they're running, and I had absolutely no problems with my Freya kit. I was just curious if this was an isolated incident, and I was the lucky winner, or if there are other people out there with similar situations with the ARFs.

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HelicopterHIROBOOther › Sceadu EVO 50 ARF factory assembly problems?
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