>
> Tom,
>
> That's Rotax that didn't like the inertial mass messing with the gearbox and slipper clutch. Last I heard, the were worried about it contributing to rapid clutch and gear wear.
>
> I'm not sure where people get the idea that a Warp drive prop is lead slug of a prop, it just isn't. I just walked into the shop and weighed both a Sensenich 2-blade wood, and the three-blade Warp for the 3300. At 9 lbs. with three blades, the Warp is only 33% heavier than the 6 lb Sensenich with a chunk missing from one blade. Not bad for adding 50% more blades. On the 2200 with the two-blade Warp, the difference is much smaller.
>
> --Kimberly
Speaking of the 912 and MOI limits. One interesting factoid about this is in the 912 installation manual, p 121. The max. MOI allowed on the 912 is 6000 kgcm^2, exactly the same limit that's on the 2-stroke C box.....
I don't know if that's purely a CYA move or if it's really legit, but I'd say it should probably be followed.
I just thought it was interesting, especially given that the 912 gearbox is visibly much more heavily built than the C or E box.....
As for the warp drive, I had a long talk with Daryl about this not too long ago when I was debugging my prop harmonic problem. Even with 3 blades, the WD comes in under this MOI limit tho maybe it's close to it. But it doesn't exceed it according to him and I trust his judgement on that of course.
It's definitely heavier than my powerfin 3 blade for sure, but it was also significantly lighter in terms of MOI than my IVO 3 blade medium was....
In 2 blades, it's probably about the same MOI as your standard woody....
LS
>
>
>
> ----- Original Message -----
> From: titjab
> To: Titanaircraft@yahoogroups.com
> Sent: Wednesday, September 16, 2009 8:19 PM
> Subject: [Titanaircraft] Re: Which Prop for a Titan II S with a Jabiru 2200?
>
>
> Kimberly, I was under the impression that Jabiru did not recommend unsing warp drive props due to the direct drive and heavy weight of the prop. If I remember correctly it was causing issues with cranks.
>
> --- In Titanaircraft@yahoogroups.com, "Kimberly Panos" <kimberly@> wrote:
> >
> > Tom,
> >
> > Here at Motion Aero, we only sell the Warp Drive 62" taper tip for Jabirus. The 2200 uses the two-blade. We've had two customers that purchased aircraft with wood Sensenich props, and both came apart without warning. Jabirus turn the prop 800 RPM higher than Rotax, which is significant, and something to keep in mind. We worked with Warp Drive to customize the diameter, length and shape of the taper-tip prop to provide the best performance for Jabirus, and they work better than any other prop we've tried.
> >
> > --Kimberly
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: tom_sled
> > To: Titanaircraft@yahoogroups.com
> > Sent: Monday, September 14, 2009 4:23 PM
> > Subject: [Titanaircraft] Which Prop for a Titan II S with a Jabiru 2200?
> >
> >
> > Hiya Gents (and Miss Kimberly),
> >
> > I should be getting my Titan II S kit delivered next week and just ordered my Jabiru 2200 today and will pick it up when I attend their class Nov 15. My question to all those flying the Jabiru 2200: Which prop is best, Senench wood or which? Oh, and why?
> >
> > Thank ya all for your times,
> > Two-To-Tango Tom...
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
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