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Would this person be the legendary "Jersey Jim" Martin that Marguerite
Gargulio told me about? Said I should meet him. She said that
he was another old-timer. (Should I have been insulted?<G>)
<p>Bill Glaze
<p>Mike Mueller wrote:
<blockquote TYPE=CITE><style></style>
<span
class=031220321-21072003><font face="Arial"><font color="#0000FF"><font size=-1>
Hey Dean, Jim Martin was a great pilot! Good to hear he's still around.
Mike</font></font></font></span>
<blockquote dir=ltr style="MARGIN-RIGHT: 0px">
<div class="OutlookMessageHeader" dir="ltr"><font face="Tahoma"><font size=-1>-----Original
Message-----</font></font>
<br><font face="Tahoma"><font size=-1><b>From:</b> Dean Pappas [<A HREF="mailto:d.pappas@kodeos.com">mailto:d.pappas@kodeos.com</A>]</font></font>
<br><font face="Tahoma"><font size=-1><b>Sent:</b> Monday, July 21, 2003
12:32 PM</font></font>
<br><font face="Tahoma"><font size=-1><b>To:</b> discussion@nsrca.org</font></font>
<br><font face="Tahoma"><font size=-1><b>Subject:</b> RE: fixed vs. rectracts
... Drag and turbulence</font></font>
<br> </div>
<span class=240125815-18072003><font face="Arial"><font size=-1>Hi Wayne,</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>Here's
what little I know from both a theoretical and practical basis.</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>In
general, our open wheel wells stink! </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>They
are draggy and may cause all kinds of turbulence.</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>Some
ar worse than others, and there is no easy way, short of a flight test
or wind tunnel,</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>of
telling which </span><span class=240125815-18072003>setups will be
cleaner. </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>Tricycle-geared
retracts are generally better than tail-draggers because the wheel wells
are aft</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>of
the wing's high-point.</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>According
to one "real" aerodynamicist I spoke to, the best setups for drag reduction
are in order:</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>1)
retracts with good tight fitting doors. </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>2)
cleanly faired fixed gear.</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>3)
retracts the way we presently do them.</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>4)
crude fixed gear.</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>5)
and retracts with poorly fitting doors can possibly end up being horrible!</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>As
far as turbulence goes:</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>Our
open wheel wells in the leading edge made this guy cringe!</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>He
warned that poorly located fixed gear can cause turbulence with the flow
under the wing root.</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>Now
from a practical point, I can recount my own experiments and one done by
Jim Martin</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>about
a million years ago. (okay in the early seventies!)</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>I
have taped the wheel wells over and put small streamlined tires on both
my JEKYLL ( about 4 years ago) </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>and
an old tail-dragger TIPORARE (after the Tangerine contest in '83). Both
planes showed no discernable speed</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>difference,
but </span><span class=240125815-18072003>there was no fancy instrumentation.
The JEKYLL flew the same, but I thought that</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>the
TIPO </span><span class=240125815-18072003>(named TURNARARE) rolled
more nicely. I thought that the transition, as I started to apply</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>the
down pressure in a slow roll, went more smoothly. I eventually discovered
that a slack piece of tape </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>across
the wheel well in the area of the wire strut gave me the same benefit.
Other builders make very </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>shallow
and narrow troughs for the wire, probably for the same reason. Since I
fly from fairly rough grass,</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>the
tape allowed more strut bend without binding. </font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>Experiments
with big P-51 style gear doors on the Jekyll showed that it was affected
horribly by turbulence</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>with
the gear down, with or without the wells taped over. Result? Pants and
legs should be as small as practical.</font></font></span><span class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>Jim
Martin (team member in '73) put heavy duct-tape over </span><span
class=240125815-18072003>the </span><span class=240125815-18072003>
wheel wells of his BANSHEE when he forgot</font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>the
air pump for his Rhom-Airs. Just last year, he told me that he </span><span
class=240125815-18072003>thought
the plane flew maybe a tiny bit </font></font></span><span class=240125815-18072003><font face="Arial"><font size=-1>better,
despite the heavy tape. </font></font></span><span
class=240125815-18072003></span><span
class=240125815-18072003></span><span class=240125815-18072003><font face="Arial"><font size=-1>I
hope this muddies the waters adequately,</font></font></span><span
class=240125815-18072003><font face="Arial"><font size=-1>
Reagards</font></font></span><span
class=240125815-18072003><font face="Arial"><font size=-1>
Dean P.</font></font></span><span class=240125815-18072003></span>
<blockquote dir=ltr style="MARGIN-RIGHT: 0px">
<div class="OutlookMessageHeader" dir="ltr"><font face="Tahoma"><font size=-1>-----Original
Message-----</font></font>
<br><font face="Tahoma"><font size=-1><b>From:</b> Wayne Galligan [<A HREF="mailto:wgalligan@goodsonacura.com">mailto:wgalligan@goodsonacura.com</A>]</font></font>
<br><font face="Tahoma"><font size=-1><b>Sent:</b> Thursday, July 17, 2003
4:23 PM</font></font>
<br><font face="Tahoma"><font size=-1><b>To:</b> discussion@nsrca.org</font></font>
<br><font face="Tahoma"><font size=-1><b>Subject:</b> fixed vs. rectract
l.g.</font></font>
<br> </div>
<font face="Arial"><font size=-1>Ok now. lets get down to the aerodynamic
aspect of the rectract vs. fixed gear. Anyone have some valid plus/minus
on the two.</font></font> <font face="Arial"><font size=-1>WG</font></font></blockquote>
</blockquote>
</blockquote>
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