SR-71

Hello all - I'm in the process of building an Align 600 Pro (nitro) and currently have an O.S. .50 Hyper engine I was planning on installing in it. Fellow heli friends of mine have have recently told me they have experienced problems with this engine over heating and bearing issues, and that the KME Diamond .60 engine might be a better option for the Align 600.

I've been away from the R/C hobby for several years and I'm just now getting back into it, so I'm not familiar with what works and what doesn't work. In the past I've had many O.S. engines that have performed flawlessly in fixed wing craft, so I'm at a loss as to why some of my fellow club members are having problems with the O.S. .50 Hyper engine.

I'd be interested in hearing any reports (good or bad) on either the O.S. .50 Hyper, the O.S. .55, or the KME Diamond .60. Or if bearing replacement on the O.S. engine (prior to the initial installation) would be a good way to go.

Thanks,

SR-71
PM: [email protected]

BarracudaHockey

My Feedback: (11)

Hyper is a great motor, the bearings are hit and miss, I wouldn't void the warranty by tearing into them and if you're not running 30 percent nitro and flying on the edge of burning up the motor like many do, the bearings should last ok, just resign yourself that its a maintenance item and replace them once a season or when they start to rattle at idle.

Personally I'd get a OS55 but its pricey compared to what the hyper is going for.

Aframomum

My Feedback: (10)

SR-71,
Sent PM.

BarracudaHockey

My Feedback: (11)

Throw it on out there

SR-71

Hummm, this is going well.

Aframomum

My Feedback: (10)

Okay,

[link=http://www.helifreak.com/forumdisplay.php?f=78&order=desc&daysprune=-1]Link[/link]

Mark