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Kyosho Caliber 30 & 60 - Concept - Nexus > CALIBER 60 question
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Hi guys !

Want to put a YS 80 in my Caliber 60. I already know that all necessary conversion parts are available. Cyber Heli for example offers a conversion set which includes the new ladder frame A (CA6527), the new clutch (CA6521), new clutch drum (CA6522), new clutch shaft (CA6523) and new starter extension (CA6524).
Question: Are these parts designed to fit both OS and YS engines or just one of them.
I ask because the old 60 design clutch mechanism required two different clutch shafts for OS and YS. The reason for this is the different
crankshaft threads on OS and YS.
Til now I could not find out whether the new clutch parts are designed to fit one particular engine brand or whether they are universal.

Does anybody know more about that???

Mike
06-29-2002 Over year old.
 
 
Jarno
Veteran
Location: Finland

Hi Mike,

I see no reason for why those Cyber parts won't fit. As far as I know, Kyosho is collaborating with the OS, so most likely those conversion parts are made for OS91. But one of my friends had a Caliber with OS 61 WC and afterwards he decided to swap for the YS61. He didn't have to buy a new cluch shaft, but he just needed to tap YS threads to it. No big deal at all.

Hope this helps..

Jarno
06-29-2002 Over year old.
HOMEPAGE  
 
 
Chris.C
Senior Heliman
Location: Hong Kong

I remember in my parts bin that there should be a clutch shaft/starter extension made for YS engine. Will advise you the part no if I find it.

If you put in the YS80, do you need to change the gear ratio? I remember the standard C60 should be around 9.5:1 main rotor to engine. I saw in a Japanese web site that they use 7.55:1 for YS80.

Hope this help.

Chris
07-02-2002 Over year old.
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Thanks Jarno! To be honest I don't like the thought of tapping a thread into an existing one of different shape. But in this case it seems to be the only way. If Kyosho don't release a clutch shaft fitting the YS I won't have a choice.
Mike
07-02-2002 Over year old.
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Hello Chris!
The part that you have in mind is No. CA6076. I know that one. Unfortunately it fits only the older 60 clutch and cannot be used for the newer 90 clutch system. As for the gear ratio I would like to use 7.9:1. I fly my FREYA-EX with an YS 80 using this gear ratio and to me it seems to be perfect for F3C style flying. For 3D a higher ratio like 8 or more should work better I guess. 7.9:1 for the CALIBER can be achieved using a 50T counter pulley with a 91T main gear.

Mike
07-03-2002 Over year old.
 
 
Chris.C
Senior Heliman
Location: Hong Kong

Yup, you're right. The part no is CA6076. To my knowledge, there is no upgrade clutch and clutch shaft for the YS80. They just use the existing parts(YS61) for the 80. I may be wrong.

Cheers.

Chris
07-08-2002 Over year old.
 
 
josephk
Senior Heliman
Location: Toronto, Ontario, Canada

Mr. Mike or Chris

Have any of you done putting the YS 80 into the Caliber yet ? Can anyone tell me what parts are needed ? On the otherhand, just when Cyberheli start carrying YS90 engine? I want more power.
07-15-2002 Over year old.
HOMEPAGE  
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Josephk

Actually I wanted to put the YS 80 in my CALIBER 60 but finally I didn't do it for several reasons. First of all the main frame has to be reinforced.This is done by removing the ladder frame (A) CA6056 and replacing it by the new one which has number CA6527 and is much more solid and stiff compared to the old one. (OK so far)
BUT this new frame shifts the position of the engine down by 5mm. The reason for this is the clutch. As you will know, the original CALIBER 60 clutch uses to engage at relatively high rpm. And that would become a problem with a 80-90 engine which works at lower rpm with a lower gear ratio. That could make the clutch slip at hovering speeds.

The new 90 clutch which is different in shape and size solves the rpm problem but for the reason that it is larger it makes the engine move down by 5mm and therefore can only be used with the new ladder frame (A). But the main problem is that it only fits the crankshaft thread of OS engines and by now there is no YS version available.

I didn't like the idea of retapping existing threads so I decided to put in the new OS 70 SZ-H which does not require any modifications on the helicopter. As for the OS 91 SX-H which all the Kyosho 90-upgrades are made for, I had two of them in my HIROBO Eagles, I didn't like these engines and so I didn't consider to put one in my CALIBER.

I can mail you a list of all 90-upgrade parts including the new gear ratios, if you like.

As far as I know, the YS 91 will not be available before fall 2002.

best regards
Mike
07-16-2002 Over year old.
 
 
Chris.C
Senior Heliman
Location: Hong Kong

Mr. Mike

Putting a OS70 into the Caliber needs a little modification. The present gear ratio in my C60 is about 9.5:1 with 91T main gear. I think this is a little high for the OS70.

Did you find out the optimum ratio for this engine yet?

Cheers,

Chris
07-18-2002 Over year old.
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Hi Chris

I'm still waiting for the OS 70. It should arrive on monday. I think that
9.48:1 should be OK for the 70. It's working within exactly the same rpm range as the OS 61 SX-H and both of them produce maximum power at 16000 rpm.

On the other hand, FREYA 70 kits are equipped with a 11T pinion and combined with a 95T main gear (which is standard) that makes a gear ratio of 8.63:1 .

It's really hard to say which one is the right one. There was also a similar discussion about the right gear ratio for the YS 80. The ratio recommended by the YS 80 manual lies between 7 to 8:1.
The one recommended for the YS 80 by Miniature Aircraft is 8.45:1 and Hirobo's choice is 7.92:1 for both YS 80 and OS 91.

Stefano Lucchi, an italian F3C pilot who was 11th at the 2001 F3C Worldchampionship in Muncie used a gear ratio of 7.92:1 for his OS 61 SX-H.
To some degree it also seems to be matter of taste I guess.
But as soon as I have tried the OS 70 in my C60 I'll let You know what I've found out.

best regards
Mike
07-19-2002 Over year old.
 
 
Wayne Mann
Senior Heliman
Location: United States of America

WM
07-21-2002 Over year old.
 
 
josephk
Senior Heliman
Location: Toronto, Ontario, Canada

Welcome to RUnRyder Mr. Mann

Thankyou for your input and I am so glad we have a great F3C flyer joining us to talk about the Calibers !!!
07-22-2002 Over year old.
HOMEPAGE  
 
 
Rotorboy
Heliman
Location:

Mike,

I will second the info that Wayne gave you regarding the YS80. I have been running the 80 in my Calibers since last year and have not had any problems using the stock parts. I did use a tap on the OS clutch shaft that comes in the kit so it would fit the YS and the runout is as good as using the YS optional part.

As Wayne said the only reason for all of the upgraded frame parts is to eliminate vibration of the OS 91. The YS does not need this. Also, the best ratio for the YS depends on your flying style, but in any case you can only go up to 7.91 with the Caliber. For optimum 3D you would probably want 8.2 to 8.4 but that will not be available for the Caliber.

Rotorboy
07-26-2002 Over year old.
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Hi Wayne!
Hi Rotorboy!

Thanks for the info. It was very helpful. I've already installed the YS 80 with the YS clutch shaft, 7.9:1 gear ratio and the new drive belt.

The new drive belt came with 4 shims (2 for each side of the engine mount). I installed all 4 of them as written in the manual, but I'm not sure about the belt tension. I might be wrong but I think it's a little too tight.
Each of the 4 shims is 1mm.
What do you think?
And what about the belt tensioner?

Best regards
Mike
08-06-2002 Over year old.
 
 
Wayne Mann
Senior Heliman
Location: United States of America

WM
08-06-2002 Over year old.
 
 
Chris.C
Senior Heliman
Location: Hong Kong

Hi Wayne

Besides the modifications related to the engine, what else did you do to the head to make your Caliber more stable and easier to control in hovering manuvers for F3C?

and what is the weight of your chopper?

Thanks for your time,

Chris
08-06-2002 Over year old.
 
 
Mavpro
Heliman
Location: Bodø, Norway

Re thread/ belt tension is no problem

Hi All!
I first installed the YS into the stock frame. Now I'm running it with all the upgrade parts from CyberHeli. Also, I mounted the cooling fan from Caliber 50. This is a much more effective, 5-bladed fan than the stock fan. I rethreaded the shaft with no problems. The belt tensioner I refitted into the hole where the tensioner's arm originally is fitted. This way the tensioner is moved perfectly closer to the belt. Note that bolt dia. here is smaller, so you need to mount a tube over the bolt to fit inside the bearings.

This is the way I did it, and it works great. I believe the engine runs smoother in hover due to the heavier clutch...:-)

Finn
08-07-2002 Over year old.
HOMEPAGE  
 
 
Mr. Mike
Senior Heliman
Location: Vienna, Austria

Hi Wayne!

Thank you for the belt info. Same with me. Don't need a jumping belt. I will keep all four shims.
BTW, did you get the e-mail I sent you on 30th july??

Best regards
Mike
08-08-2002 Over year old.
 
 
Mavpro
Heliman
Location: Bodø, Norway

8,4/1

Field rep. Ørjan Haug in Norway now flies his Cal' "80" using self constructed and machined 8,4/1. I've seen him fly (with a 2 gallon old set-up!) F3C with this set-up, but I hardly noted any performance gain from the engine. Yesterday when I spoke to him, he told that the engine now is well broken in, and performance is awesome!!

So if anyone out there really want the 8,4/1, go ahead and find the right bar stock aluminium and get it machined. There are lots of people out there who can do this...
08-08-2002 Over year old.
HOMEPAGE  
 
 
Caliber-1
Heliman
Location: Kyosho heaven

Hello everyone. I assume you remember me from a while back with the cooling issues? Well , they are long solved. Simply 90 degree curve was not 90 at all. Just thought I would let everyone know. Wayne Mann is right. The fan for this machine is virtually useless. We took temp readings with and without, and very minor differences. And I mean minor.

But I do have a wobble problem at a certain head speed. At roughly 1750 RPM head speed the head is smooth but the heli seems to wobble in a hover. I was told this is head dampening. I greased them switched them to no change. Is there a fix or an upgrade to new dampeners?

Curious.
Gary.
08-09-2002 Over year old.
 
 
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Kyosho Caliber 30 & 60 - Concept - Nexus > CALIBER 60 question
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