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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Help engine change
11-09-2012 04:58 PM  7 years ago
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jking1

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Toms River, N.J. US

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Help engine change
Hi,All looking For help.I have a old X-cell 60 custom with a OS60 engine .
I would like to upgrade too a OS 105hz engine does anyone know
how to do this ? What do i need to do this? Can it be done?
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11-09-2012 05:06 PM  7 years ago
BladeScrape

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Warren OH. US

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I would probably suggest a new machine to put the engine in.Bladescrape
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11-09-2012 06:16 PM  7 years ago
greenboot

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Marblehead, OH

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In theory it just bolts in, but you would likely need a longer boom, new blades, and different gears (to start with). Why are you stuck on the old bird? I'm sure you could find a used .60 real cheap if cost is a factor.Tom
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11-09-2012 06:26 PM  7 years ago
Mike Fortin

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USA

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You should be able to bolt it right in. You will need to check your gearing but everything else should be fine.

Make sure everything is nice and tight as well, the bigger engine will surely give that model power it wasn't really designed for but should handle.

You will obviously also need a larger volume muffler to accommodate the new engine.

Good luck with it.
Have Rotors, Will Fly!
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11-09-2012 07:31 PM  7 years ago
BJames111

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San Diego, California

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Unfortunately, the clutch is not likely to handle the power. It CAN be upgraded, but it will cost.
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11-09-2012 07:54 PM  7 years ago
jschenck

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La Vista, NE.

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I would think an OS-70 or even 91 would be a better option since the RPM is about the same. OS-70 should be able to use the same exhaust.
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11-09-2012 08:10 PM  7 years ago
MartyH

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USA

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OS70 needs a .91 size muffler to make full power. It will run and tune on a .61 size pipe but it will be way down on power. OS70 will bolt right in in place of an OS61.

I don't like the 105 for the application you are suggesting. I doubt the driveline can handle the power and speeds I think you're going to try to put though it.
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11-09-2012 09:20 PM  7 years ago
marc8090

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Long Island, N.Y.

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Don't do it. I had an X-Cell 1004 Graphite back in the day that I converted from 61 to 91 with the longer boom and blades and correct gear ratio. It was never designed for that much power. The frame flexes way too much, as well as having dampening issues leading to boom strikes. Blowing mine up twice was enough for me.
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11-09-2012 11:51 PM  7 years ago
BladeStrikes

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Shelby TWP,Mi

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MartyH
OS70 needs a .91 size muffler to make full power
The OS 70HZ won't make full power with a 90 size pipe,the engine will make less power...The OS 70HZ will make top power with the Hatori SB-70,thats the best pipe for that engine..
The OS 70HZ with Hatori SB-70 would be a really good upgrade..
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11-10-2012 12:04 AM  7 years ago
BONO1

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AR

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105
It can be done. Just bolt in the 105 with a proper muffler for the engine. I'm guessing your not a hard 3D guy so just do it and fly.

Sam
blow smoke
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11-10-2012 02:12 AM  7 years ago
777ER

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Westchester county, NY, USA

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About the 61 vs 91...I know the mounting dimesions are the same but I've been told the 91 sits higher than the 61 even with the same mounting location and specs, just that the height from the bottom of the mount to the crankshaft centerline is off a lil. Can anyone shed light on this?

I see Vigors have to get the mount milled in order to use the 91 and have the clutch line up properly.
-Chris
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11-10-2012 02:46 AM  7 years ago
Heliflyer69

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Northen Cali

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I converted a Pro2k from a 61 to 91. Aside from gear ratio change..was a bolt-in affair.

A Xcell custom is a bent frame model. You are sure to have lots of frame flex. If i remember correctly, the only HD clutch upgrade was that from a bent frame gasser, or from the 4-stroke model. Hope you have deep pockets and are patient as these parts are very very hard to find.

A Fury or Stratus might be a better choice and are quite inexpensive nowadays.

Just my 2 cents
Roy
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11-10-2012 10:21 AM  7 years ago
MartyH

rrProfessor

USA

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The OS 70HZ won't make full power with a 90 size pipe,the engine will make less power...The OS 70HZ will make top power with the Hatori SB-70,thats the best pipe for that engine..
I'm pulling all 16,000+ from the OS70 on an MP5 muffler. The Hatori is not worth the price for me.
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11-10-2012 12:33 PM  7 years ago
GMPheli

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W. Bridgewater, MA USA

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"A Xcell custom is a bent frame model. You are sure to have lots of frame flex."

IMHO, the old bent frame heli's (X-Cell, Gmp) have one of the best frame designs ever. The bent frame in the back creates triangulation, making it significantly stronger than a stacked frame counterpart. And right in front of the motor, there is a flat frame piece that runs top to bottom, 90 degrees to the rest of the frame. This adds a huge amount of stiffness for very little weight. This design was way ahead of its time. The drawback is it is hard to tell if they get bent in a crash.
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11-10-2012 01:32 PM  7 years ago
Four Stroker

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Atlanta

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The MA stacked frame with only two standoffs in the back was crap - made a flex joint. The Kalt stacked frame with three standoffs in a triangle in the back is very rigid. The bent frames were OK until you bent them. MA "borrowed" bent frames from Schluter.
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11-11-2012 04:09 PM  7 years ago
jking1

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Toms River, N.J. US

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Help engine change
Hi Guys,I would like to thank everyone for all the help.I have had the X-cell custom for years it has been upgraded over the years carbon frames, tail boom,lots of stuff.Anyway i just don't want to let it goSo I will try the engine change if it does not work I will have to let it go .thanks again to all
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11-12-2012 01:07 AM  7 years ago
John Krebs

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Pittsburgh, PA

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I have an SE99 and was thinking of upgrading the motor also. I'm flying a 7 pound Velocity N2 with a YS60 and the old 10 pound X-Cell with the OS61SX-WC feels just anemic. It does auto great though and I have a set of flat-bottom blades for it. I wouldn't mind throwing a few dollars at just for fun. But if it goes in that will be the end.

John
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