[Titanaircraft] Re: Any Tornado S or SS for sale in US or Canada

--- In Titanaircraft@yahoogroups.com, "Kess Blaswich" <kessb@...> wrote:
>
> LS,
>
> Thanks so much for the heads up on the Ivo.
>
> It does seem pretty fast for me, after cutting the prop down from 68" to 66" per the Ivo sales rep. He said that other Thundergull and Titan props were running 66" to 60". As I mentioned, the electric prop drive gearbox failed in coarse, and I bought a ground adjust conversion so I could keep flying, while I had the electric drive rebuilt. Now I see 100mph at 5700-5800rpm, and have been checked along side of a Cessna 150, as well as my Hangar mate's Titan 1. My climb now is about 1000' fpm at 70mph, here on the coast at sea level, and my flat out speed at 6600-6700 rpm, seems to be 115mph now, with my last adjustment. I also have the + blades that have a lot of bite and turn slower with the 3:1 'C' box, than my buddies 2-blade, 60" Ivo and 2:62 on his Titan 1, with a 503. I climb faster, but our 100mph fast cruise, ands and wide-open 115mph speeds are side by side. One thing that I'm learning is that lb per hp is a big thing. I'm at 696-700lb gross and 52hp, for about 13.5lbs per hp. My goal is 10lbs per hp or better, that's when the real fun starts!
>
> Kess

Yep, that sounds like about the best you can do already so I wouldn't spend any more money trying other props that probably aren't going to give you any improvement.

Just for data purposes:

I had a 503 equipped trike for about 4 years (an AC fun racer) and the fastest prop I tried on it was the IVO ultralight in 66" 2-blade (I had the 2.58:1 B gearbox). It would almost achieve Vne in level flight at full power. The wing's Vne was 90mph, the time I tried WOT/level flight my bravery stopped at 80mph with the bar only a few inches from my chest. I still had a little more to go with the engine still turning only about 6400 rpm at that time.

I did end up putting a powerfin on it (66" 2 blade F model) because it climbed better than the IVO and weighed less, but again it didn't have the speed range of the IVO.

On my Kolb, which had the 3.47:1 C box on it, I ran a 68" WD 3 blade taper tip. That was just about the ideal combo for that plane/motor/GB.

The PF I have on my titan is an F model 70" 3 blade. At its current setting of about 13.5 degrees of pitch, I get around 1000fpm climb at density altitudes of 8000-8500MSL, which is slightly better than the IVO I had on it (66" 3 blade medium). But at cruise that yeilds about 82-85mph indicated. That goes up of course if I add pitch, but then it lugs the motor at lower speeds.

LS
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> From: ls78705
> To: Titanaircraft@yahoogroups.com
> Sent: Tuesday, December 01, 2009 5:56 PM
> Subject: [Titanaircraft] Re: Any Tornado S or SS for sale in US or Canada
>
>
>
>
>
> --- In Titanaircraft@yahoogroups.com, "Kess Blaswich" <kessb@> wrote:
> >
> > Hmmmm. . . . . ........, now you have me wondering about trading my Ivo prop for a Powerfin, now that they are back in business. Is the Ivo a ground adjustable, or in flight adjustable? Until my electic drive quit on the Ivo, and I converted it back to ground adjustable, I thought that it was the best thing going, but I found myself not using the coarse setting very much without bogging the R-503 and a 68" 3-blade on a 'C' 3:1 gearbox. Now I have trimmed my prop down to 66" as per Ivo tech rep.
> >
>
> My IVO had the electric adjust but its demise is a long story. I originally replaced it with a Warp Drive, which had spectacular high-speed performance, but it also had a bad harmonic that I was never able to successfully treat. In the interest of long-term safety I had to pull it and I replaced it with the PF.
>
> The powerfin is a more conventional type of prop, with stiff, big, lightweight blades using a clark Y airfoil.
>
> So, it's more of heavy pusher type prop with a narrower speed range, unless you go with a smaller diameter. But nothing makes the cows get smaller faster than a powerfin. I've used them for years and I think they're my favorite prop of all - the engines/gearboxes love them because they're so light and they push like all get out.
>
> But they're not too good for a wide speed range. The Warp Drive is what you want for that, especially the taper-tip. It works virtually like a constant speed prop. And ironically, the IVO is also a really good prop for a wide speed range especially if you run it as a 2 blade.
>
> > Still wondering about the best prop. Faster is always better!!
>
> For going fast, the Warp Drive is the way to go, followed closely by the IVO.
>
> So if you want to go fast, you probably already got the prop you want. The IVO is already great for going fast....
>
> I'm an altitude/go "up" man who likes to spend more time in the plane so I go for heavy pushers when I have a choice (so I love PF's). But for going fast, I'd say what you have is already about as good as you can get.
>
> LS
>
> > Kess
> >
> >
> >
> > ----- Original Message -----
> > From: ls78705
> > To: Titanaircraft@yahoogroups.com
> > Sent: Tuesday, December 01, 2009 3:59 PM
> > Subject: [Titanaircraft] Re: Any Tornado S or SS for sale in US or Canada
> >
> >
> >
> >
> >
> > --- In Titanaircraft@yahoogroups.com, "Roger" <rtracy@> wrote:
> > >
> > > Having done my transition familiarization with JD in
> > > your plane I can say ... keep it .. it's a rocket ship
> > > and it's roomy. And it's nicely built.
> > >
> > > RT
> > >
> >
> > Oh yeah that's right. I keep forgetting you've flown this one, never mind ;).
> >
> > It actually is even more of a rocket in the "up" dept. now with the powerfin fitted. It already climbed like nertz with the IVO but it's almost 200fpm better with the powerfin (I'd say 150fpm average better climb over the IVO).
> >
> > It's a little slower in the forward dept. now, but the good thing about that is you're in the plane longer when going somewhere.....
> >
> > Gas consumption also dropped to right at 3gph at 85mph indicated at 9500-10000' MSL, so it's a little cheaper to fly as well ;)
> >
> > LS
> >
> >
> >
> >
> >
> >
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