Hks 700t

[Geowitz]

CLEAR PROP

http://www.youtube.com/watch?v=u8kVJg53Gxc

Started the engine last night. Took a little cranking to get fuel through the injectors, but it started without any problems. No leaks and temps look good so far at least with the cowling off.

A little wobble/oscillation or vibration of sorts in the Ivoprop visible at the tip of the in flight adjust motor. Looks like the tip of the electric motor is tracking slightly off axis. I checked the blade tracking and all blades are within 3/16" and I'm assuming at this point that they are balanced. Didn't go over 3000 rpms so I don't know if it would even out. I'm suspect of my mounting bolts being unevenly torqued with the fiberglass spinner backplate causing the motor to not be bolted on straight? The hub looks like it's spinning fine without much movement, but the tip of the IFA motor looks like it's wobbling, not loose, just out or round/off axis. Any ideas?

[rwaltman]

Sorry, cannot help with your question, just wanted to say congratulations!

[Woodennickle]

Not an expert, and haven't stayed at a Holiday Inn lately, but I would say that 3/16" is too much.

[Av8r3400]

Not for an IVO. They flex quite a bit.

[Mnflyer]

Agree not for an IVO in fact IVO says not to worry about tracking or at least they did a few yrs back.

[Geowitz]

I think I may have found the culprit and I'll be an idiot if it's what is causing the problem. At this point though I'd rather be an idiot and this fix work than it be something serious. I'll report back tomorrow after another run up to check.

Thanks for the comments. I'm so close now!

[Geowitz]

Well, I may be an idiot, but my thoughts were incorrect and I have not fixed my issue yet. I have noticed though that on subsequent starts everything is rather violent and shakey until the prop gets up to speed. I mean bucking bronco type engine violence. Is the moment of inertia of the medium IVO too much for the 700T? I'm starting to lean this way which is unfortunate because I had high hopes of the IFA taking full advantage of the turbo. Might have to give that up for a lighter prop. Idle should be around 1600 rpms. At this speed the prop will go back into bucking mode with violence. Around 2000 rpm is somewhat bearable, but my panel is shaking like it's doing the jig. Above 2000 I can almost feel numbness in my body from the vibrations and see the panel shaking. It smooths out relatively above 3000 rpms and gets better the higher I go. Got it to 4300 rpm today.

Any thoughts? If I had a prop with too much MOI what would be the dead give away symptoms other than ripping my gear box apart after continuous use? Anyone have any clue what the MOI is for the medium IVO?