No subject
Mon Nov 1 15:18:15 CDT 2010
but that's only half the answer. Not shown in this photo are the
smooth-outside, threaded-inside aluminum caps that screw onto the threaded
rod on each side. These caps are the proper diameter to mate with the
female receptacles of the standard orange (or small manual red) tow bars
that are common available.
Hope this helps -- should be a piece of cake for a guy like you!
Bob Jackson
Apopka, FL X04
Turbo XL
N2XF
PS Sorry I missed you in Oregon this summer -- I had a great time, and
enjoyed flying out of both the Aurora and Troutdale airports. Maybe next
year...
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of David Ullman
Sent: Friday, November 05, 2010 10:58 PM
To: reflector at tvbf.org
Subject: Re: REFLECTOR: towbar
I have moved my Velo to the airport for final assy and testing. Getting
close to a real airplane. I will post pictures when it is al together for
the first time. Question, what do FG people do for a tow bar? The front
wheel has a pant on it with a bolt in the location where a tow bar hooks on
many other planes. I just want to pull and steer by hand. I could just put
a rope or a hook through the nose tie down and do pretty good. I haven't
come up with a better idea yet. Any suggestions?
David G. Ullman PhD ME
Robust Decisions
ullman at robustdecisions.com
541-754-3609
************
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I think having the CG forward of =
the pivot
point will tend to make the nose wheel unstable and want to flip around =
180 --
didn't you say that backwards, Brian? Having it aft of the CG =
would make it
more stable and less likely to shimmy, correct? What am I =
missing?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
color=3Dblack face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:windowtext'>
<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>
</span></font></div>
<p class=3DMsoNormal><b><font size=3D2 color=3Dblack face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight=
:bold'>From:</span></font></b><font
size=3D2 color=3Dblack face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma;
color:windowtext'> reflector-bounces at tvbf.org =
[mailto:reflector-bounces at tvbf.org]
<b><span style=3D'font-weight:bold'>On Behalf Of </span></b>Brian =
Michalk<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Saturday, November =
06, 2010
11:51 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> <st1:PersonName =
w:st=3D"on">Velocity
Aircraft Owners and Builders list</st1:PersonName><br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: REFLECTOR: =
towbar</span></font><font
color=3Dblack><span =
style=3D'color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=3DMsoNormal><font size=3D3 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>Nice design, but normally, you want CG as far =
forward
of the pivot as possible, not aft.<br>
<br>
Also, there was an analysis here ... I think by Ulmann, who concluded =
that our
shimmy problems are not caused by the CG/pivot arrangement.<br>
<br>
On 11/05/2010 11:46 PM, Bob Jackson wrote: <o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:smarttagtype =
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags" =
name=3D"State"><u1:smarttagtype =
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags" =
name=3D"City"><u1:smarttagtype =
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags" =
name=3D"place"><!--[if gte mso 9]><xml>
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<u1:shapelayout u3:ext=3D"edit">
<u1:idmap u3:ext=3D"edit" data=3D"1"/>
</u1:shapelayout>
</xml><![endif]-->Dave,<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>Our gear is retractable, so I'm not sure =
exactly how
you might apply what we did. However, I can tell you that although =
many
Velocity's don't make any provision for it, we have found that adding a
standard tow bar male 'tang' arrangement to our nose gear leg has been =
an
invaluable feature. <u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>Moving the plane around in a crowded hangar =
at home,
or when you're traveling, it has been 'priceless' for us to be able to =
use a
standard small Cessna type 'manually' controlled tow bar, or one of the =
big
orange ones (common at most FBOs) to move our plane =
around.<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>It might be more essential because our =
Velocity is so
heavy, but when we have a full load of fuel (93 gals), it is very =
difficult to
move our plane around -- either trying to push up small inclines, or for =
tight
maneuvering because with full fuel it is essentially impossible to pick =
up our
nose to make tight turns (unless you enjoy =
hernias!).<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>My aircraft partner designed (with some ME =
help) and
had fabricated the tow bar adapter shown below, as it is attached to the =
top of
our nose gear fork. This is the front view. It is also =
important
(as I'm sure you would appreciate) that the extra weight of the 'tangs' =
is on
the back side of the fork -- for anti-shimmy =
reasons.<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText align=3Dcenter style=3D'text-align:center'><font =
size=3D2
color=3Dblack face=3D"Courier New"><span style=3D'font-size:10.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<u1:p></u1:p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>From the back side it looks like our tangs =
are made
from steel threaded rod, but that's only half the answer. Not =
shown in
this photo are the smooth-outside, threaded-inside aluminum caps that =
screw
onto the threaded rod on each side. These caps are the proper =
diameter to
mate with the female receptacles of the standard orange (or small manual =
red)
tow bars that are common =
available.<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText align=3Dcenter style=3D'text-align:center'><font =
size=3D2
color=3Dblack face=3D"Courier New"><span style=3D'font-size:10.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<u1:p></u1:p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>Hope this helps -- should be a piece of cake =
for a guy
like you!<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>Bob =
Jackson<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><st1:place u4:st=3D"on"><st1:city =
u4:st=3D"on"><st1:place
w:st=3D"on"><st1:City w:st=3D"on"><font size=3D2 color=3Dblack =
face=3D"Courier New"><span
style=3D'font-size:10.0pt'>Apopka</span></font></st1:City></st1:city>, =
<st1:State
w:st=3D"on"><st1:state =
u4:st=3D"on">FL</st1:State></st1:place></st1:state></st1:place>
X04<u1:p></u1:p><o:p></o:p></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>Turbo =
XL<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>N2XF<u1:p></u1:p><o:p></o:p></span></font></p>=
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>PS Sorry I missed you in <st1:state =
u4:st=3D"on"><st1:place u4:st=3D"on"><st1:State
w:st=3D"on"><st1:place =
w:st=3D"on">Oregon</st1:place></st1:state></st1:place></st1:State>
this summer -- I had a great time, and enjoyed flying out of both the =
Aurora
and Troutdale airports. Maybe next =
year...<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>-----Original Message-----<br>
From: <a =
href=3D"mailto:reflector-bounces at tvbf.org">reflector-bounces at tvbf.org</a>=
[<a =
href=3D"mailto:reflector-bounces at tvbf.org">mailto:reflector-bounces at tvbf.=
org</a>]
On Behalf Of David Ullman<br>
Sent: Friday, November 05, 2010 10:58 PM<br>
To: <a href=3D"mailto:reflector at tvbf.org">reflector at tvbf.org</a><br>
Subject: Re: REFLECTOR: towbar<o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>I have moved my Velo to the airport for final =
assy and
testing. Getting<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>close to a real airplane. I will post =
pictures
when it is al together for<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>the first time. Question, what do FG =
people do
for a tow bar? The front<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>wheel has a pant on it with a bolt in the =
location
where a tow bar hooks on<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>many other planes. I just want to pull =
and steer
by hand. I could just =
put<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>a rope or a hook through the nose tie down =
and do
pretty good. I =
haven't<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>come up with a better idea yet. Any =
suggestions?<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><u1:p> </u1:p><o:p></o:p></span></font></=
p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>David G. Ullman PhD =
ME<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>Robust =
Decisions<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><a =
href=3D"mailto:ullman at robustdecisions.com">ullman at robustdecisions.com</a>=
<u1:p></u1:p><o:p></o:p></span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>541-754-3609<u1:p></u1:p><o:p></o:p></span></f=
ont></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'>************<u1:p></u1:p><o:p></o:p></span></f=
ont></p>
<pre wrap=3D""><font size=3D2 color=3Dblack face=3D"Courier New"><span
style=3D'font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><fie=
ldset class=3D"mimeAttachmentHeader"></fieldset><font
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><fon=
t
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'>______________________________________________=
_<o:p></o:p></span></font></pre><pre><font
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'>To change your email address, visit <a
href=3D"http://www.tvbf.org/mailman/listinfo/reflector">http://www.tvbf.o=
rg/mailman/listinfo/reflector</a><o:p></o:p></span></font></pre><pre><fon=
t
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><fon=
t
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'>Visit the gallery! <a
href=3D"http://www.tvbf.org/gallery">www.tvbf.org/gallery</a><o:p></o:p><=
/span></font></pre><pre><font
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'>user:pw =3D =
tvbf:jamaicangoose<o:p></o:p></span></font></pre><pre><font
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'>Check new archives: <a
href=3D"http://www.tvbf.org/pipermail">www.tvbf.org/pipermail</a><o:p></o=
:p></span></font></pre><pre><font
size=3D2 color=3Dblack face=3D"Courier New"><span =
style=3D'font-size:10.0pt'>Check old archives: <a
href=3D"http://www.tvbf.org/archives/velocity/maillist.html">http://www.t=
vbf.org/archives/velocity/maillist.html</a><o:p></o:p></span></font></pre=
>
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Roman"><span
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