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<DIV><SPAN class=914412220-17112004><FONT face=Arial color=#0000ff size=2>Dave
and I are trying to decide if he sings and I dance, or the other way around.
Either way, bring ear-plugs!</FONT></SPAN></DIV>
<DIV><SPAN class=914412220-17112004><FONT face=Arial color=#0000ff size=2>Sounds
reasonable, though.</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of
</B>randy10926@comcast.net<BR><B>Sent:</B> Wednesday, November 17, 2004 9:45
AM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> [SPAM] RE: 3-bladed
props for OS160FX<BR><BR></FONT></DIV>
<DIV>How about a demo/seminar from the Dave and Dean show at the NATS next
year?</DIV>
<DIV> </DIV>
<DIV>Randy</DIV>
<DIV> </DIV>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>
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<DIV><SPAN class=331373014-17112004><FONT face=Arial color=#0000ff
size=2>And now, the Dave and Dean show have spoken ...</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On
Behalf Of </B>DaveL322@comcast.net<BR><B>Sent:</B> Wednesday, November 17,
2004 9:22 AM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> RE:
3-bladed props for OS160FX<BR><BR></FONT></DIV>
<DIV>...and a further variable....</DIV>
<DIV> </DIV>
<DIV>It is quite difficult to measure the pitch of the prop without
knowing the zero angle of attack of the airfoil used on the prop (which
often changes along the span of the prop). So the pitch reading from
a pitch gauge is really just a reference. For the most part, I've
found that reducing the pitch of an APC close to the root results in a
fairly equal reduction along the span of the prop (as measured on a
Prather pitch gauge).</DIV>
<DIV> </DIV>
<DIV>Regards,</DIV>
<DIV><BR>Dave</DIV>
<DIV> </DIV>
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Original message -------------- <BR>
<DIV> I guess if you want to maintain a true helical pitch, if you
are reducing the pitch then you will need to add some pitch back towards
the tips. Higher pitch props have more twist along the blade than lower
pitch props. So if you depitch at one point towards the root, then you
end up with a blade that effectively has washout. Correct? That may be
good for our purpose.</DIV>
<DIV> </DIV>
<DIV>Bob.</DIV>
<DIV><BR><BR><B><I>Dean Pappas <d.pappas@kodeos.com></I></B>
wrote:</DIV>
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<DIV><SPAN class=514511421-16112004><FONT face=Arial color=#0000ff
size=2>Claudio,</FONT></SPAN></DIV>
<DIV><SPAN class=514511421-16112004><FONT face=Arial color=#0000ff
size=2>Ideally you would twist the prop at several places to acheiv
helical pitch. In practice, this is entirely unnecessary. Twist once,
as close to the hub as practical, and that will work just fine. I see
that Dave L added more detail to the procedure.</FONT></SPAN></DIV>
<DIV><SPAN class=514511421-16112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=514511421-16112004><FONT face=Arial color=#0000ff
size=2>until later,</FONT></SPAN></DIV>
<DIV><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </DIV>
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