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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi Guys,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>You know that mounting a motor setup is a difficult task at
best to get perfectly done. The main problem is that there are so many
variables to be addressed all at once like: <o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Spinner position</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Nose-ring position</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Firewall position</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Resultant thrust angles</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Angle or motor tilt within the
space</span></font> <font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Matching flat surfaces together
in a ½ blind situation (backplate of mount to firewall). <o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Small angle sag of mount with
engine installed (happens to any mount that is intended to be used with a
nose-ring).</span></font> <font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The typical mounting procedure I’ve been aware of and
using is something like this:<o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Mount the engine to the mount</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Place this assembly into the
plane</span></font> <font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Mount the spinner backplate to
the motor with a thin spacer (I use 1/8” spacer)</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Jostle this into position then
rough-out a firewall.</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>When you think you got the
firewall sized right, tape the spinner to the plane, turn plane vertical,
glue firewall in place – cross fingers</span></font> <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Return after glue dries, create
a nosering then prey more. Admire the work with a tinge of
disappointment then…..</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>…. Create a small shim to
get the correct thrust angles after you realize you are off a hair….
(I’m sure no one else has had to this right??)</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This time around while working on a YS installation in an
Abbra I decided to reverse this scenario entirely and make attempts to reduce
the number of variables and tolerance build up. The easiest thing to get
right and fixed is the center of the nose and spinner location. So, step
#1 was to:<o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l2 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Install nose ring phenolic disk
that I predrilled for a Central Hobbies nose-ring.</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l2 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Once this was installed I can
position the motor and mount assembly through the nose-ring with the
nose-ring actually mounted to the plane. This allows for some
“movement” of the back of the motor to fine-adjust the
resulting thrust angles.</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l2 level1 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>*New step – maybe you
guys were already doing this – Make a temporary spacer to lift and
position the motor mount in the free space of the engine
compartment. This spacer places the motor & mount assembly into
a fixed position to you can see the resultlant thrust angles.</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<ol style='margin-top:0in' start=1 type=a>
<li class=MsoNormal style='mso-list:l2 level2 lfo3'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Once done, the motor is
resting just where it needs to be without any pressure, forces, or chance
while you can now trial fit the firewall.</span></font> <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
</ol>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Firewall:<o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>However you got this, now you
can trial fit it to the exact repeatable location every time because the
motor and mount are installed in the plane (… with nose-ring already
fixed – exactly where you want it to be for flight) (positioned by
nose-ring and temporary spacer).</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Once you get the fit you want,
tack glue the mount to the firewall and unscrew the NOSE-RING from the
front on the plane. <o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>At this point the entire
assembly lifts out of the plane</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Remove engine from mount</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Mark exact location of drill
points for motor mount</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Drill, fix, with blind nuts.</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Reassemble mount, motor, and
install into plane with NOSE-RING screws to disk.</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l3 level1 lfo4'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Re-check for firewall fit and
glue.</span></font> <font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>At this point I have everything done up till the tack-glue
point of the firewall to the mount. I should get through it tonight and
tomorrow. Maybe you guys were already doing it this way, but this is the
fist for me and using this approach has take some chance and tolerance build up
out of the equation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:PersonName w:st="on"><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Jim</span></font></st1:PersonName><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> W</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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