From: "Mark Steitle" <flyrotary@lancaironline.net>
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Date: Wed, 6 Aug 2014 15:57:52 -0500
Message-ID: <CAHh3jbPQgokB3teqcvQDzQS+dkSkaRbRHNq2Y9d-f7urxtj4bA@mail.gmail.com>
Subject: Re: [FlyRotary] Trip report
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Tracy,

Thanks for posting your numbers.  I typically fly below 10,000, but at the
same rpm, higher MAP.  Typical cruise is 195-200 mph, burning around
11.2-11.5 gph.  Maybe I should slow down, or fly higher.

For those unfamiliar with my setup, it is a Lancair ES, 20B-PP, 2.17:1
psru, M/T electric 3-blade c/s prop.

Mark S.


On Wed, Aug 6, 2014 at 1:38 PM, Tracy <flyrotary@lancaironline.net> wrote:

> Here's some trip data from a flight from Florida to Colorado in the 20B
> powered RV-8.    It's the first long trip where I was able to fly at or
> near the altitudes it was optimized for.   It didn't do as well as I had
> hoped in terms of fuel economy but the numbers were as good or slightly
> better than the typical Lycoming powered RV numbers I hear.   It is only
> slightly faster than my Renesis powered RV-4 at cruise conditions and
> reasonable fuel flow.  But what I like about it is the effortlessness with
> which it does the job.  There is always a handful of throttle left for
> reserve in any normal flight situation.
>
> Full throttle is reserved for those few seconds between rudder
> effectiveness at 30mph and lift off speed at 60.  As soon as the wheels
> break ground I typically reduce manifold pressure to 24".   Cruise climb is
> done at between 18 and 19" depending on takeoff weight at around 700 FPM.
>  Cruise altitude was limited to 15,000 this trip by temperature.  I wasn't
> thinking and wore only a thin jacket and I don't have cabin heat.   All
> three legs were flown at 14,500 in a very unusual high pressure system the
> whole way with almost zero wind.  Here are the raw numbers:
>
> Altitude       14,500
> OAT              35 -  43F
> TAS              174  -   182 MPH  *
> Fuel Flow     8 GPH
> Engine RPM  5250 - 5450
> Manifold Pressure    14.3"
> % Power       30%   (As calculated by EM3)
> EGT              1450F
> Water temp   145 - 150
> Oil Temp       160        (Cowl flap would help temps and airspeed)
> Total flight hours on trip  9.2
>
> *  Fuel flow was held constant, TAS varied with fuel batch.  Low number
> was with Florida gas with about 8% ethanol.   Refueled at Charlie England's
> place (Thanks for the hospitality and fuel service Charlie!).  Not sure
> wether it had ethanol or not but TAS was a few MPH better.   After
> refueling at 47K in Kansas with no ethanol mogas, the TAS reached the
> highest number.
>
> Tracy
>
> Sent from my iPad
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>

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<div dir=3D"ltr"><div>Tracy, </div><div>=A0</div><div>Thanks for posting yo=
ur numbers.=A0 I typically fly below 10,000, but at the same rpm, higher MA=
P.=A0 Typical cruise is 195-200 mph, burning around 11.2-11.5 gph.=A0 Maybe=
 I should slow down, or fly higher.=A0 </div>
<div>=A0</div><div>For those unfamiliar with my setup, it is a Lancair ES, =
20B-PP, 2.17:1 psru, M/T electric 3-blade c/s prop.=A0 </div><div>=A0</div>=
<div>Mark S.</div><div>=A0</div></div><div class=3D"gmail_extra"><br><br><d=
iv class=3D"gmail_quote">
On Wed, Aug 6, 2014 at 1:38 PM, Tracy <span dir=3D"ltr">&lt;<a href=3D"mail=
to:flyrotary@lancaironline.net" target=3D"_blank">flyrotary@lancaironline.n=
et</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Here&#39;s some trip data from a flight from Florida to Colorado in the 20B=
 powered RV-8. =A0 =A0It&#39;s the first long trip where I was able to fly =
at or near the altitudes it was optimized for. =A0 It didn&#39;t do as well=
 as I had hoped in terms of fuel economy but the numbers were as good or sl=
ightly better than the typical Lycoming powered RV numbers I hear. =A0 It i=
s only slightly faster than my Renesis powered RV-4 at cruise conditions an=
d reasonable fuel flow. =A0But what I like about it is the effortlessness w=
ith which it does the job. =A0There is always a handful of throttle left fo=
r reserve in any normal flight situation.<br>

<br>
Full throttle is reserved for those few seconds between rudder effectivenes=
s at 30mph and lift off speed at 60. =A0As soon as the wheels break ground =
I typically reduce manifold pressure to 24&quot;. =A0 Cruise climb is done =
at between 18 and 19&quot; depending on takeoff weight at around 700 FPM. =
=A0Cruise altitude was limited to 15,000 this trip by temperature. =A0I was=
n&#39;t thinking and wore only a thin jacket and I don&#39;t have cabin hea=
t. =A0 All three legs were flown at 14,500 in a very unusual high pressure =
system the whole way with almost zero wind. =A0Here are the raw numbers:<br=
>

<br>
Altitude =A0 =A0 =A0 14,500<br>
OAT =A0 =A0 =A0 =A0 =A0 =A0 =A035 - =A043F<br>
TAS =A0 =A0 =A0 =A0 =A0 =A0 =A0174 =A0- =A0 182 MPH =A0*<br>
Fuel Flow =A0 =A0 8 GPH<br>
Engine RPM =A05250 - 5450<br>
Manifold Pressure =A0 =A014.3&quot;<br>
% Power =A0 =A0 =A0 30% =A0 (As calculated by EM3)<br>
EGT =A0 =A0 =A0 =A0 =A0 =A0 =A01450F<br>
Water temp =A0 145 - 150<br>
Oil Temp =A0 =A0 =A0 160 =A0 =A0 =A0 =A0(Cowl flap would help temps and air=
speed)<br>
Total flight hours on trip =A09.2<br>
<br>
* =A0Fuel flow was held constant, TAS varied with fuel batch. =A0Low number=
 was with Florida gas with about 8% ethanol. =A0 Refueled at Charlie Englan=
d&#39;s place (Thanks for the hospitality and fuel service Charlie!). =A0No=
t sure wether it had ethanol or not but TAS was a few MPH better. =A0 After=
 refueling at 47K in Kansas with no ethanol mogas, the TAS reached the high=
est number.<br>

<br>
Tracy<br>
<br>
Sent from my iPad<br>
--<br>
Homepage: =A0<a href=3D"http://www.flyrotary.com/" target=3D"_blank">http:/=
/www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:81/lists=
/flyrotary/List.html</a><br>
</blockquote></div><br></div>

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