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Message-ID: <002301c78b77$1f90f070$2402a8c0@edward2>
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Cc: "sboese" <sboese@uwyo.edu>
References: <list-2018227@logan.com>
Subject: Attn: Steve: [FlyRotary] trimmed prop
Date: Mon, 30 Apr 2007 18:30:14 -0400
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Really hate to see your prop trimmed, Steve.  But, glad it happened on the 
ground.

Distractions are usually the reasons for such - I made my first flight ever 
with the pitot tube cover unremoved on my Friday the 13th trip to Tracy 
Crook prior to Sun & Fun.  Airspeed indicator was rendered inoperative which 
made the tower directed go-around on a 30MPH gusty day no fun at all. The 
cover was air tight and the trapped 14.7 psi air on the one side apparently 
ruptured the diaphragm and broke the airspeed indicator.  Flying now with a 
flea market one picked up at Sun & Fun.

I happen to have a prop suited to the 2.17:1 gear drive.  It is a 
Performance Prop  68x72.  While I do not wish to sell it, I am more than 
happy to loan it to you until you can get a new prop - provided of course 
you lose the tow bar (kidding of course).

Let me know your mailing address and I will get it out to you this week 
assuming you can't find one to buy

My EC2 now has the snubbers thanks to your investigative work and it is 
really much more pleasant to fly and particularly to idle, so thanks again.

Ed

Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda/index.html
----- Original Message ----- 
From: "sboese" <sboese@uwyo.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, April 30, 2007 5:01 PM
Subject: [FlyRotary] trimmed prop


On Wednesday of last week I made my first XC flight with my 13B powered
RV6A.  The flight was from Laramie, WY, to Benson, MN, with a distance
covered of 507 nm.  It took 4hr 15 min non stop using 30.4 gal of fuel
leaving 7.6 gal reserve.  We started at an initial gross wt of 1796 lb and
cg of 73.2 in. That was my first excursion to density altitudes less than
7000 ft.  It was really fun to see climb rates over 1000 fpm with 1700 lb
gross wt at 3200 ft density altitude and to feel the increased acceleration
on take off.  Static rpm at 3200 ft density altitude was 4870 with 27 in MAP
and showing 11.1 gal/hr fuel consumption rate.  That makes me think I could
use a prop with less pitch.  My extrapolation of the mixture table for the
EC2 with the snubbers installed worked very well with the higher manifold
pressures that had not been tried previously with my setup.  That was good
news.

The bad news is what happens when I forget to remove the tow bar and feed it
to the propeller (see attached photo).  No injuries or other damage occurred
as far as has been determined at this point.  The 12 hour drive back home
yesterday gave me plenty of time to reflect on my stupidity.  I concluded
that my "experiment" was probably not the best way to investigate the effect
of a smaller prop.  Needless to say, if someone has upgraded to the 2.85
drive and has a prop for a 2.17 drive for sale, I would be interested to
know about that.

Sheepishly,

Steve Boese


--------------------------------------------------------------------------------


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