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Craig,
I ran the Hartzell 68" prop on my 360 for many years
and 700 hours. It's a good prop and maxed out around 217 kts.
I now run a 68x85 fixed pitch prop from Craig Catto. His prop is 9
mph faster than the Hartzell from sea level (plus 44 inches) (225 kts) to
18K. Or stated another way, I can save 1 1/2 gph at the same TAS.
The constant speed is nice but needed balancing. I'm sure it's a little
stiffer than that MT you're looking at. The Catto is much faster and
a delight in slow cruise at 185 kts (7gph) and smooth as glass. I believe
the Catto prop to be the most efficient choice.
The biggest difference (perhaps obvious) between the
Hartzell and Catto is around the airport. When within 10 miles of the
field I can go to idle and always make it with the Catto. The Hartzell by
contrast is a giant speed break when at idle power. I carry power all the way to
touchdown with the Hartzell. Takeoff roll provides the opposite
affect. I can roll over a 1000 to sometimes 1800 feet to get airborne with
the Catto. The Hartzell has much shorter takeoff rolls. I recently
took off from Steamboat Springs (7K MSL) on a cool day (Catto Prop). The
plane took 2500 ft at max gross wt. This seemed ok on a 4500 ft runway
although the Hartzell would have been more comfortable.
BTW, we're running a 68x80 Catto on Rick C.s 160 hp 320
as well. It turns 2400 rpm 156 kts (179 mph) and 2600 rpm at 169
kts (194 mph). It is a little older prop design (perhaps slightly less
efficient) than the props that Craig now makes. Top speed 197 kts (227
mph) at 2950 rpm.
I like Catto Props so much that I might one day be
willing to part with my Hartzell.
Larry Henney
Race 36
N360LH
925 hours
Posted for
Sky2high@aol.com:
Craig,
Lyc 320's have no
restriction on how long you can run your engine at
takeoff
power. I ran the Air Venture Cup races at WOT, 2680 RPM
(it felt
good
there) and 2000-3000 MSL for the Dayton
to Finish Line leg - just a bit over
2
hours. Uh, you will need adequate fuel flow
for that.
Grayhawk
In
a message dated 3/26/2010 5:23:43 A.M. Central Daylight
Time,
craig@skybolt.net
writes:
Hi Randy,
Your very
funny. You have quite a collection too that may be slowing
you
down. Maybe we should be requesting that
they start making the trophies
out of aluminum.
That 3 blade
scimitar MT is a sexy looking prop. I was
hoping that I
would hear everyone come back that they were
faster with it. Love the quiet
and smooth but got to have
that speed baby. Tonight I did a test run with
some minor tweaks and it ran 212 kts at 3000
ft. Std day. 2550 and WOT.
Guess I am going
to need rocket pods to do much better.
Craig
N73S
L320
From:
randy
snarr <randylsnarr@yahoo.com>
Sender:
<marv@lancaironline.net>
Subject:
Re: [LML] Re: Prop for LNC2
Date:
Thu, 25 Mar 2010 22:33:39 -0400
To:
lml@lancaironline.net
(http://mail.lancaironline.net:81/Lists/lml/Message/54477-H.txt)
(http://mail.lancaironline.net:81/Lists/lml/Message/54477-P.txt)
I have only run the MT 3 blade. I too love this propeller.
Very smooth and
light. On my IO320 the prop weight is only
37 lbs. Please don't ask how I
know this but it is a
wood core, combination of spruce and a highly
compressed
beachwood If I recall what the factory told me, with a fiberglass
shell
and stainless leading edge for protection from
moisture ect..
Wood also is flexible and has natural
dampening properties. It is the
only propeller I have run
on the airplane but it is fast. Even with my
Legacy
style tips (25' wing) I am also running the larger legacy
tail (MKII) and a
completely stock IO320 ( injected/
Elec IG) and I can get to 198-200 KTS
TAS at
8000.
I would love to try other propellers but that is too
much of a hassle for
me. I am happy with the set up and
would definetaly buy another one..
Craig, If I recall,
weren't you at about 210 KTS with your current set up?
Leave
the OSH GC trophy home and the weight savings alone will get you
another
5 KTS...
FWIW...
Randy Snarr
N694RS
235/320
---
On Wed, 3/24/10, Lorn H Olsen <lorn@dynacomm.us> wrote:
From: Lorn H Olsen
<lorn@dynacomm.us>
Subject: [LML] Re: Prop
for LNC2
To: lml@lancaironline.net
Date: Wednesday,
March 24, 2010, 9:28 AM
Craig,
I love my
_http://www.aerocomposites.com/_ (http://www.aerocomposites.com/)
prop. I have over 600 hours on the prop, including an
overspeed to 3,400
rpm (not the props fault), and the prop
doesn't even have 1 scratch on the
leading edge. I have
seen Hartzel's that looked like they needed an
overhaul at
200 hrs on PA-180's.
Aero Composites uses a nickel
leading edge. No inspection required for the
overspeed according to Aero
Composites.
Lorn
> Posted
for "Craig Schulze" <_craig@skybolt.net_
(unknown://mc/compose?to=craig@skybolt.net) >:
> Date: March
23, 2010 6:06:52 AM EDT
>
> Hi
Guys,
>
> Does anyone have any feedback on
different props for the Lancair
320/360?
> Has anyone tried a
Hartzel Scimitar? MT? Any performance
differences
over
> the standard Hartzel 2
blade?
>
> Thank
you,
> Craig Schulze
> Lancair
320
--
Lorn H. 'Feathers' Olsen, MAA,
ASMEL, ASES, Comm, Inst
DynaComm, Corp.,
248-345-0500, mailto:_lorn@dynacomm.us_
(unknown://mc/compose?to=lorn@dynacomm.us)
LNC2, FB90/92,
O-320-D1F, 1,700 hrs, N31161, Y47, SE
Michigan
--
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