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01-13-2006 01:34 PM  13 years ago
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richie1967_uk

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London UK

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New Cuatro
My Cuatro kit has arrived. Wow what a nice kit. Great quality parts and an excelent instruction manual....I am very pleased indeed.
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01-13-2006 02:09 PM  13 years ago
Bell Bloke

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UK

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Get those pics up matie!
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01-13-2006 02:47 PM  13 years ago
richie1967_uk

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London UK

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Not much to see yet, just bags of bits and a big canopy...I thought the predator was big but this is huge...I will post some pics as i go along. (I cant compete with BergenRC's build post tho, nice job)
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01-13-2006 03:56 PM  13 years ago
Sparkhead

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Melbourne Australia

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Great to hear, you should be very happy with the heli once you have finished.
Mick.

Robbe & Futaba.
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01-15-2006 12:14 PM  13 years ago
richie1967_uk

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London UK

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So far i have but the head together (apart from the blade grips, I have some metal ones on the way) and the tail gearbox. Boy is it a nice kit. It is by far the smoothest running tail of any heli i have built so far. The quality of the parts is exceptional with everything going together no problems. The head is very smooth also, very heavy, with the plastic grips and the see saw only the head weighs nearly 300g...As mentioned before the instructions are deffinately the best i have come accross so far. The kit also comes with good quality grease plus the correct thread lock...There are a set of allen keys included...man i have so many of theses now i dont know what to do with them!! I was surprised to find that the blade bolts are 4mm and not 5mm like the predator, the metal blade holders i have ordered have stainless steel bushes for the bolt holes, I guess 4mm will be ok or they wouldnt have designed it that way...
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01-15-2006 01:46 PM  13 years ago
Sparkhead

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Melbourne Australia

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I also use Ramster Design head blocks on all of my Robbe machines. The originals have been known to shear off above the Jesus bolt where the blocks diameter reduces to make way for the antirotation sleeve. I think alot of the blocks failed after multiple crashes and hard 3D abuse but I replace them anyway. With the turbine being alot heavier, swinging a larger heavier disc and being so expensive it was an easy choice for me. I used the Quick UK blade grips and they only use a 4mm bolt as well and so far they are holding up fine. What sort of metal grips did you order?

Just one more thing, with the tail gear box I set it up as per the manual which has a speed up gearing. This was no good for me causing massive harmonic vibrations in the tail. My horizontal fin was buzzing about an inch at both tips. I was lucky enough to have some 1 to 1 gears here and installed those and the vibes went away. I'm using 121mm tail blades, so if you are thinking of running longer blades you might have the same problem.

Mick.

Robbe & Futaba.
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01-15-2006 02:16 PM  13 years ago
richie1967_uk

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London UK

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The metal grips are from rcmarket.com, The kit comes with 1:1 gears (20 teeth i think) Robbe must have sorted the problem with the speed up gears, in the manual it shows the gears ast 20T and 17T, however there is a correction slip which has the 1:1 gears instead. I am using the 105mm V blades on the tail. I will go and check out the Ramster head
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01-15-2006 02:27 PM  13 years ago
Sparkhead

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Melbourne Australia

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I'm glad they changed the tail gears, I must of got a slightly older kit. It was a horrible feeling to pick up a new machine and have it vibe like that. Especially after all the time I spent balancing everything.
Mick.

Robbe & Futaba.
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01-16-2006 10:17 AM  13 years ago
Futurac

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Belgium , Europe

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Cuatro
Mick

Robbe replaced every set of 20/17 tail gears per complain, so i dont think it should be an issue.

As for main block,unless you are in HARD 3d, it will not break, and even with the Hard 3d, there are some open questions.

I am also building Turbine Cuatro, its going really nice.

Of course i did put all Possible upgrades on it.

Richie, make sure you use the central Unit in the head S4513, and 80 durometer orings. the weight of the heli will need those.

and i would recommend some metal bits under the head as well.
Alex (Formerly Known as RCMarket )
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01-16-2006 04:40 PM  13 years ago
richie1967_uk

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London UK

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Hi RCmarket, the S4513 is fitted, i have used the 3 0-rings supplied, with the extra shim (S4205) fitted to make for harder damping. I received the main blade grips today...thanks. Which bits bellow the head do you recomend?
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01-16-2006 05:07 PM  13 years ago
Futurac

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Belgium , Europe

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Bits
Bell Mixers V2, Longer washout Arms, Wahsout Hub
Alex (Formerly Known as RCMarket )
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01-17-2006 10:31 AM  13 years ago
NEIL2-UK

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UK - South East

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Robbe Head Blocks
I've not had any experience of faults with any of the Cuatro headblocks from Robbe with turbine use, and hard 3D.

CAUTION: I have had experience of a near failure with someone using an aftermarket rotor mast in a Robbe Head Block. The mast only just went up above the 'jesus' bolt and so the Head Block was not fully supported.
The Robbe mast (and any correctly machined replacements) go right up into the head block, and just protrude above the end of the main boss of the block.

I use Robbe Standard Parts, my Own TT Parts... and some Aftermarket Parts from RCMarket and QuickUK. All reliable and put up with a lot of hard use.

Thanks
NEIL
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01-17-2006 01:34 PM  13 years ago
Sparkhead

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Melbourne Australia

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I'd heard of the blocks breaking overseas and thought that the helis might of been getting a thrashing. I then saw that one of our F3C pilots had the same thing happen to him. He was basically doing an inverted pass and the head snapped clean off right where everyone elses had. All of the parts on his heli were genuine Robbe parts and I've seen the block after it snapped.

I for one wouldn't even think about swinging a turbine chopper off this head block. By the time you put a fuz on one of these things you've got to be looking at 10 kgs hanging off it. Each to their own but I think its the best $65 I've spent.

Mick.

Robbe & Futaba.
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01-18-2006 06:47 AM  13 years ago
sharam

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Northern California - Fly at Morgan Hill Field

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I have been flying my Cuatro now for a couple of years and it is a tremendous joy to fly. Steady as a rock - funny thing is most of my friends at the field just drop whatever they are doing and watch the Cuatro fly - it's majestic! Manuevers are big - big loops, big rolls, big tumbles. Leave enough room and time for whatever you are doing until you get used to its large size.
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