|
|
. However on my application it is actually a plus. How
much HP do you estimate on your Velocity?
Tom
Mine
is ormally aspirated with the 9:1 rotors. Before break-in, the dyno runs gave
WOT power (corrected to sea level, standard day) shown below. Max prop
rpm is 3000 (6500 engine); so ‘rated’ power is 275 hp. But
then of course we never fly at sea level. Takeoff WOT climb is typically less
than 250 hp; cruise power at altitude more like 150 hp. That gets me lean
cruise of 170 KTAS at 10 gph. Quite satisfactory.
On Mar 13, 2011, at 9:41 PM, Al Gietzen wrote:
I
have no comment about the quality/capacity of the Marcotte; but I think the 2.4
ratio is a good one. I had considered the Marcotte for that reason, but liked
the in-line drive of the planetary, and had more confidence in Tracy’s overall design and coupling design.
Al
(Velocity 20B; 210 hours and
counting)
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On Behalf Of Thomas
Giddings
Sent: Sunday,
March 13, 2011 11:37 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Marcotte PSRU vs 550HP
Turbo/20B
Thanks Kelly for the reply...Guy Marcotte claims 600HP
is not a problem....I would really like to hear from others with first hand
knowledge...I just read of his PSRU being used on a Glassair /Suburu project.
They had broken the gear ,but it was from a prop strike...I am gathering up
what I need to mock this up in the Airframe and need to make a decision on it
fairly soon...Honestly I had made my mind up it was the best choice for my
application .
Tom Giddings
VP Avionics Sales
MIDWEST AVIONICS
200 Hardy Roberts Dr
PO Box 219
West Paducah,KY 42086
877-904 9966
Cell; 727 858-1772
FAX:270 744 3466
tom@midwestaviation.net
On Mar 13, 2011, at 3:15 PM, Kelly Troyer wrote:
What HP rating is Marcotte claiming for his PSRU
?...............From the experience of a few users
on this group and others
using product have reported it seems to have a checkered operational
and
maintenance
history..............John of this group (13B/Marcotte in Tailwind) reported a
problem he had
to resolve not long
ago..............John jump in here and give Thomas your experience and if you
think
this PSRU will stand up to a
Turbo/20B of about 550+ HP..................I personally would have severe
reservations about the Marcotte at
that power level..............FWIW
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo
From: Thomas Giddings <tom@midwestaviation.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sun,
March 13, 2011 1:37:10 PM
Subject: [FlyRotary] Re: Crankcase ventilation
Does anyone have any experience using a 2.40 gear reduction on the 20B? I am
going to use the Marcotte PSRU only because he has a much higher HP
Rating and it is only offered in the 2.40 ratio in the configuration I am
using. However I notice everyone uses the 2.85 more commonly. Is there a
specific reason why this would be better for the 20B?. I would appreciate any
input any of you might have to offer.
image001.gif
|
|