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HomeAircraftHelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Vibe 50 vs. Vibe 90
03-04-2008 01:06 AM  10 years agoPost 1
Nashville

rrElite Veteran

Formerly Music City now back home in Sunny Florida

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I know very little about JR helis, other than they are high quality. I am very interested in the new 50 and if that's a winner I'd be interested in a new 90. So is the new 50 a scaled down version of the current Vibe 90 or is the 50 a new design? If it's a new design I would assume they would incorporate the new positive design features in a new 90? Just wondering about Jr's history and how they operate. Thanks.

I was Spektrum when Spektrum wasn't cool

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03-04-2008 01:27 AM  10 years agoPost 2
mdu6

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Montreal

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Here's my interpretation

There are really 2 JRs

A Japan side
A US side

The Japanese side is building general purpose and F3C type machines.

The US side has designed 3D machines (Vigor, Vibe, Vibe50) from their design office (CY + others) and by selecting components made by the Japan side when they would make sense.

In the case of the Vibe50, the Japanese roots is the Airskipper50, but with major elements designed from scratch (Head, tail, torque tube).

It could be said that there is not that much Vibe in the Vibe50, besides hopefully a solid design and good performance.

I'm sure others will add more to this short summary

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03-04-2008 02:11 AM  10 years agoPost 3
Nashville

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Formerly Music City now back home in Sunny Florida

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Very interesting. Thanks. Not what I was expecting. Interested to hear more.

I was Spektrum when Spektrum wasn't cool

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03-04-2008 12:33 PM  10 years agoPost 4
hockeyrules99

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topeka KS

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vibe 50 has different style head than the 90... its not a scaled down vibe 90. Lots of differences and I would'nt want my 90 changed at all ...(other than parts price )its a great machine! The 50 has very reasonable parts pricing though.
John

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03-04-2008 04:47 PM  10 years agoPost 5
tchavei

rrProfessor

Portugal

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The Vibe 50 has definately not the same roots as the vibe 90.

For example, I have a friend in the business (germany) and he does carry all JR helis and extensive support. Thing is that he doesn't carry the Vibe 90 because its "JR USA". Now when I asked him 4 months ago about the Vibe 50, he said he wouldn't carry it because it would be another "JR USA" heli. However... 2 weeks ago, he contacted me stating that since the Vibe 50 is being produced directly by JR Japan, we would carry the kit and full parts support. The Vibe 90 is still a no no.

This leads me to believe that somehow the Vibe 90 isn't in the same bag as the Vibe 50 and other JR helis.

If you look at the Vibe 50, at least two things have been incorportated in the head... the grip flip many Vibe 90 users do is already stock on the Vibe 50 and the 140 ccpm (swashplate) is the same on both kits.

I really really like the V3D design and mechanics. I'm waiting for my kit (already preorder) but my only concern right now is how it will feel in the air compared to an evo 50 and to a 600N. The only mechanical thing I'm not very keen of right now is the 8.7 ratio but who knows? Maybe its a winner.

Tony


--------------------
"Perfection and patience usually walk side by side..."

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03-04-2008 05:02 PM  10 years agoPost 6
Matt-Drummer

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Suffolk, United Kingdom

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What's wrong with the 8.7 gear ratio using 620mm blades, the extra length of the blades compensates for the lower headspeed doesn't it?

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03-04-2008 05:19 PM  10 years agoPost 7
tchavei

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Portugal

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Don't know

Many will argue its just as good however I know my evo 50 (8.7 ratio) and I had the chance of seeing a Knight 3D (8.7 ratio again) and both birds scream their heart out at 2000+ rpm

a higher ratio should give you more torque to swing longer blades but how much agility do you have running say 620mm sab blades compared to 600mm radix/v-blades?

Don't know but we are going to find out soon arn't we?

Tony


--------------------
"Perfection and patience usually walk side by side..."

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03-04-2008 05:48 PM  10 years agoPost 8
Matt-Drummer

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Suffolk, United Kingdom

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Well 90 size machines seem plenty agile enough on 700mm blades which are longer than 620mm.

As far as I see it, the same power is transmitted to the blades if the engine is geared to be in its power band.

2000+ rpm is too much on 8.7 gearing but 620's should generate as much head power as 600's running at an appropriately lower headspeed.

I think blade availability and design in a length of 620mm is more of the issue than the actual gear ratio. Things like how far the spanwise centre of gravity is from the hub will affect the agility of the machine.

620mm blades and an 8.7 gear ratio is not a bad thing as long as suitable blades are available to get the desired flight performance.

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03-04-2008 06:51 PM  10 years agoPost 9
tchavei

rrProfessor

Portugal

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Ok so what 620mm do you know of?

I only know (and seen) SAB's 620mm and maybe rotortech 3D 610mm (which arn't 620mm)

Tony


--------------------
"Perfection and patience usually walk side by side..."

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03-04-2008 06:55 PM  10 years agoPost 10
Matt-Drummer

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Suffolk, United Kingdom

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That's the problem, as I said, it will all depend on blade availabilty.

I think you like Radix so if CY is involved in this you should expect to see 620mm Radix blades in due course, otherwise he may have advised JR on a gear ratio change?

I personally will use SAB's as I like them, but I think more aggressive 620mm will be the answer on this machine for the 600N flying style.

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03-04-2008 11:03 PM  10 years agoPost 11
tailwhip

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Southern WI

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Speaking of gear ratios,would the Vibe 50 like the bigger TT redline .53? or would an OS 50 hyper be a better choice?

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03-05-2008 12:18 AM  10 years agoPost 12
tchavei

rrProfessor

Portugal

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I'm not putting a TT in mine thats for sure

Anyway, back to reality... it could be better if the torque band is higher however I don't think there will be any issues with the hyper or YS.

1954rpm = 17000rpm on engine

SInce you want to run slightly above, if you run:

2000 rpm = 17400 rpm... sounds perfect for me

The only issue I have is the engine screaming its heart out when you don't need that

Tony


--------------------
"Perfection and patience usually walk side by side..."

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