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Hobby Hut . Heli Wholesaler . JR-Spektrum

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Gasser Model RC Helicopters > Swapping out a Spectra G's Tail Rotor Shaft
 
 
jrockstuart
Elite Veteran
Location: Allen, Texas

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Best of luck getting half of what you invested in the Spectra if you decide to sell it. It's probably best to just fix it and continue to fly it.

The Align gasser should be available soon, but I assume that will have a whole host of unforseen issues.

MinAir Spectra-G
Trex 450Pro V-bar /Scorpion /JR
Wally Motors/New England Heli/DL Canopies
11-12-2009 12:56 AM
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Fixit
Elite Veteran
Location: UK

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Quote 
The Blitz is a beautiful machine..sadly not cheap either if going to deck it.. but no vibe related wear to consider.. and it is made locally!

I have to agree with you the Blitz is a first rate Machine and although the kit price is up at the top end it’s well worthy of it, I mailed them a while ago about the possibility of buying one for a Gas conversion, in the reply they told me that one off gears and other parts wouldn’t be a problem as they actually make them.

Maybe Next Year

I only like to fly gassed up
11-12-2009 01:00 AM
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Fixit
Elite Veteran
Location: UK

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Quote 
The Align gasser should be available soon, but I assume that will have a whole host of unforseen issues.

I’m not so sure about that, it’s gone awfully quiet on the Align gasser front
I’m thinking they might have gone back to the drawing board after test flying it.

I only like to fly gassed up
11-12-2009 01:04 AM
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jrockstuart
Elite Veteran
Location: Allen, Texas

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Come to think of it, you're right. It has been awfully quiet lately.

MinAir Spectra-G
Trex 450Pro V-bar /Scorpion /JR
Wally Motors/New England Heli/DL Canopies
11-12-2009 01:31 AM
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gramey
Senior Heliman
Location: United Kingdom

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Raja, when I took the tail gearbox to pieces the C clip was lying in the grease in the bottom of the box and both grub screws on the output(?) gear were loose because the shaft just pulled straight out. I didn't have to loosen the grub screws on the gear through the hole that you spoke of to be able to take the shaft out. The gear just fell off the shaft inside the tail gearbox ewhen I pulled the shaft out.
It may well be that the clip and grub screws came loose in the crash but it's strange that both were amiss? You can see from my photograph that the tail shaft went in towards the tail fin. I find it a little strange that the tail let go in such a big way and yet you'd lead me to belive that the clip and loose screws were caused by the crash. Now don't get me wrong I fully accept that you know these machines inside out and more than once I've been grateful for your advicebut I really can't think why else the tail would have let go so badly?

I don't intend being a guinea pig for Align with their gasser, the JR Vibe 90 SG looks really nice but the Blitz looks really well thought out, is cheaper and it's British!

Dumb thumb specialist
11-12-2009 09:56 PM
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rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

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Screws

Actually Gramey its possible for the grub screws to have not been tightened well enough and/or locktited and that's what let go on you and caused the crash -- that certainly may have been an assembly error at the factory. The tail rotor pushed in thing is from the hit on the ground and that is definately what caused the C-clip to break free from the groove. So grub screws get loose in flight, you lose tail rotor rpms, spin out and crash hitting the tail shaft inwards and busting the C-clip free. That is a very plausible explanation.

Your original explanation was that the C-clip came out and hence the shaft moved inwards in flight and caused your crash didn't make sense. That's where I explained that even if that C-clip came off inside the gearbox that couldn't happen in flight if the grub screws were tight. Also, if it came off in flight its possible it will get caught in the gears and damage them.

I'm sorry to hear about your crash and feel your pain. It happens to all of us, believe me I've crashed plenty of times, 26 to be exact...

-=>Raja.

1005 Gasser, G26 3DMax++, 2205+ flights
Spectra-g, G26 3DMax, 870+ flights
11-12-2009 10:57 PM
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jrockstuart
Elite Veteran
Location: Allen, Texas

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That's 26 times too many, Raja.

I crashed for the first time in 8 months yesterday on the maiden flight of my V-barred Trex 250 due to some sort of computer malfunction. I can't imagine crashing my Spectra due to a mechanical failure. That would be a terrible loss.

MinAir Spectra-G
Trex 450Pro V-bar /Scorpion /JR
Wally Motors/New England Heli/DL Canopies
11-12-2009 11:03 PM
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rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

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What can I say

I'm not careless when you watch me you'd say I'm pretty careful with my machines not reckless but it still happens when I have so many flights logged. I was calculating and that's an average of 117 flights per crash or so. Some 3D pilots I see at funfly's crash at every funfly I see them!

Believe it or not most of them are not "my fault" with "my fault" being pilot error. I would say less than 6 are pilot error, the rest are some sort of failure either mechanical or servo related and I have 2 midairs and 1 crash in the garage included.

I did list all the crashes one time here for the 1005, I'm sure its still in an old post somewhere. For the Spectra, which I'm sure you're curious about, here's what I remember:

1. popped link
2. elevator servo gone bad
3. tail rotor servo failure
4. doors fell on it in the garage
5. angry plank pilot took it out with a midair
6. bad spot autorotation landing boom strike (this one pilot error)
7. blew head during backwards inverted auto before I mastered it, (pilot error as well).

The 1005 boasts 19 crashes, the latest one the pin in the delrin coupler sheared free as I went for one more autorotation before refueling. Powered up idle up 2 and when I punched full collective it let go spun like a top. I throttle held it and brought it down to the ground spinning on the runway but unfortunately the grass was dry and sticky and it flipped and boom struck on landing. In this case this one is not pilot error in my books but a missed save.

A couple of pilot errors I remember for the 1005 are:

1. Blew the head in an inverted auto years ago.
2. got disoriented in the evening low and far and planted it tail first.
3. high speed low flight auto pulled back and hit the tail in the ground and chopped it off though I managed to auto it down without further damage -- that was a feeling too good and getting too cocky day

I can't think of anything else at the moment but I may have missed something.

In any case, 3060+ flights later I'm still smiling cheek to cheek for an awesome time that I've spent flying those gassers! And not only that, I would say there has been at least half as much crash saves over the last 12 years. I've gotten away with it several times and people a town over heard me yell with joy At IRCHA I lost the tail rotor gears (stripped) in the 1005 but was fortunately high enough to regain control and land it way out about 500 feet away in the tall grass. At hour later after I had located some gears (thanks to Jeff from Minair gave me some free) it was flying again!

-=>Raja.

1005 Gasser, G26 3DMax++, 2205+ flights
Spectra-g, G26 3DMax, 870+ flights
11-12-2009 11:27 PM
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3 pages [ <<    <     1      2     ( 3 )    >    >> ]761 viewsPOST REPLY
E-flite . Fast Lad Performance . Ace Hobby

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Gasser Model RC Helicopters > Swapping out a Spectra G's Tail Rotor Shaft
 
 
carpman
Senior Heliman
Location: Spain

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Hi Raja a few posts back I kinda agree with you about the kits quality in general but it is a lot more than the canopies that have been substandard, not to mention many people having parts missing, and when you have to wait 2 weeks for delivery its a real pain...

Older kits had CNC parts made in the USA, newer kits have stuff milled in the far east which is not as good. Those pitch arms on the head are a good example they are made of toffee, this business with the flybar, yes it can be sorted but is not acceptable on a $1,000 plus kit.

I still like the Spectra G overall but I do not understand why people defend substandard production. Yes you do need more patience and experience to put one together perfectly but it is not that big a deal and when your in the business of selling helis to make money you have to supply a quality product and not one with parts that need attention before fitting.

Align are going to beat all suppliers the rate they are going, there was some suspect stuff to start with but they take note of their shortcomings and improve, people always knock the market leaders

Anyway hopefully MA is going to improve all round now, I hope so and wish them luck...

KEVIN
Trex 600NSP | Trex 700 | MA Spectra G
11-14-2009 08:36 PM
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3 pages [ <<    <     1      2     ( 3 )    >    >> ]761 viewsPOST REPLY
Hobby Hut . Heli Wholesaler . JR-Spektrum

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Gasser Model RC Helicopters > Swapping out a Spectra G's Tail Rotor Shaft
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