REFLECTOR: Ivo

Scott Derrick scott at tnstaafl.net
Mon Apr 27 22:48:02 CDT 2009


I'm afraid I fall into the "Bullet Proof" crowd. 

You shed a blade and the options rapidly(within seconds) go from few to
none.

Scott

nmflyer1 at aol.com wrote:
> One thing to note here. As far as I am aware, the only IVO's to fail
> have been due to people not following the mandatory instructions of
> the manufacturer. If you follow the rules, the prop appears to have a
> long life and good performance. I asked Mark Machado  how he liked the
> performance of the IVO on their 173FGE. He told me that the takeoff
> thrust was a cross between frightening and exhilarating.
>
> The prop definitely doesn't fall into the realm of put it on and
> forget about it. Personally I believe that a little extra attention is
> worth the cost, performance, and company backing.
>
> Kurt
>
>
> -----Original Message-----
> From: Dave Philipsen <velocity at davebiz.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Sent: Mon, 27 Apr 2009 9:17 pm
> Subject: Re: REFLECTOR: Running without prop
>
> Brian Michalk wrote: 
> > Okay, I'll jump in here... 
> > 
> > What I wonder, is if one took the rotational inertia of the MT, and
> > duplicated it by adding a plate to the IVO to increase the
> rotational > inertia, would the IVO still fail? There's no question
> that the > pulses on the IO360 are larger than on the Franklin. Maybe
> increasing > the inertia of the system could reduce the negative
> torque pulses? 
> Just thinking aloud here and from my experience with automobile
> engines. Would a device similar to the harmonic balancer on an auto
> engine work? As I remember, it is essentially a fairly massive iron
> ring with some kind of rubber sandwich between it and the hub. I think
> the rubber absorbs some of the harmonics. 
>  
> Dave Philipsen 
> Velocity STD FG 
> N83DP 
>  
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