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I always thought planes with landing gear axle locations too far forward of the wing leading tended to bounce more easily on landing. From what I've seen, most swept gear usually have the axle location at or very near the leading edge of the wing.<BR><BR>
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To: jpavlick@idseng.com; nsrca-discussion@lists.nsrca.org<BR>From: gfowler@raytheon.com<BR>Date: Fri, 16 Jan 2009 11:17:50 -0600<BR>Subject: Re: [NSRCA-discussion] BOLLY out of business<BR><BR><BR><FONT face=sans-serif size=2>John </FONT><BR><BR><FONT face=sans-serif size=2>Yours is the first post with a technical reasoning for sweep, and it makes sense. I of course have a AeroSlave Symphony with an ES gear and have not experienced ground issues. I am sure other designs do have issues as you describe. How common is this problem?<BR></FONT><BR><FONT face=sans-serif size=2><BR><BR><BR>Gray Fowler<BR>Senior Principal Chemical Engineer<BR>Radomes and Specialty Apertures<BR>Technical Staff Composites Engineering<BR>Raytheon</FONT> <BR><BR><BR>
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<TD width="40%"><FONT face=sans-serif size=1><B>John Pavlick <jpavlick@idseng.com></B> </FONT><BR><FONT face=sans-serif size=1>Sent by: nsrca-discussion-bounces@lists.nsrca.org</FONT>
<FONT face=sans-serif size=1>01/16/2009 11:13 AM</FONT>
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<DIV align=center><FONT face=sans-serif size=1>Please respond to<BR>jpavlick@idseng.com; Please respond to<BR>General pattern discussion <nsrca-discussion@lists.nsrca.org></FONT></DIV></TR></TBODY></TABLE><BR><BR>
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<TD><FONT size=3>Gray,</FONT> <BR><FONT size=3> My understanding of why we try to move the wheels as close to the C.G as possible is to increase yaw stability on the ground (decrease the tendency to ground loop). Tail draggers are inherently unstable because the landing gear is located in front of the C.G. Since we don't have brakes on modern Pattern planes, the wheels can be pretty far back without causing much of a problem. Especially on smooth surfaces. The closer you place the wheels to the nose of the airplane (further ahead of the C.G.), the more tendency there is to ground loop. Also, it sometimes makes it hard to get the plane to rotate if the wheels are too far forward. </FONT><BR><FONT size=3>If Pattern planes were designed with the gear location further back, we wouldn't need swept gear.</FONT> <BR><FONT size=3> </FONT> <BR><FONT size=3>John Pavlick</FONT> <BR><FONT size=3><BR>--- On <B>Fri, 1/16/09, Gray E Fowler <I><gfowler@raytheon.com></I></B> wrote:</FONT> <BR><FONT size=3>From: Gray E Fowler <gfowler@raytheon.com><BR>Subject: Re: [NSRCA-discussion] BOLLY out of business<BR>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><BR>Date: Friday, January 16, 2009, 4:37 PM<BR></FONT><BR><FONT face=sans-serif size=2><BR>Why do you prefer sweep?</FONT><FONT size=3><BR></FONT><FONT face=sans-serif size=2><BR><BR><BR><BR>Gray Fowler<BR>Senior Principal Chemical Engineer<BR>Radomes and Specialty Apertures<BR>Technical Staff Composites Engineering<BR>Raytheon</FONT><FONT size=3> <BR><BR></FONT><BR>
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<TD width="47%"><FONT face=sans-serif size=1><B>Richard Strickland <pamrich47@hotmail.com></B> <BR>Sent by: nsrca-discussion-bounces@lists.nsrca.org</FONT><FONT size=3> </FONT><BR><FONT face=sans-serif size=1>01/15/2009 05:17 PM</FONT><FONT size=3> </FONT><BR>
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<TD></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><FONT size=3><BR><BR></FONT><FONT face=Verdana size=2><BR>If I were to complain about anything on Matt's gear (I'm not) I would prefer a <I>little</I> sweep which would preclude 'a one side fits both" arrangement. How are most of you guys mounting them--two or three bolts? I've been using three 4-40s but just bought one and the former owner had two per side.<BR><BR>RS<BR><BR></FONT><FONT size=3><BR></FONT>
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<FONT face=Verdana size=2><BR>To: nsrca-discussion@lists.nsrca.org<BR>From: gfowler@raytheon.com<BR>Date: Thu, 15 Jan 2009 16:56:48 -0600<BR>Subject: Re: [NSRCA-discussion] BOLLY out of business<BR></FONT><FONT face=sans-serif size=2><BR><BR>Anthony</FONT><FONT face=Verdana size=2> </FONT><FONT face=sans-serif size=2><BR><BR>What did you think about the ES gear twist? That is the wheel going toe in- toe out hitting small bumps. ES had nothing but zero degree fibers. That is the one design issue I am conteplating at the moment. <BR><BR>Also considering that all new planes are widebody that is what needs to be addressed..BUT having a 1 continuous gear will be more weight. I am thinking it is better to split the gear for a weight savings. If we make two pieces, and either piece can be a left or a right, then a broken gear is only on one side. Any advantage to that?<BR><BR><BR><BR><BR>Gray Fowler<BR>Senior Principal Chemical Engineer<BR>Radomes and Specialty Apertures<BR>Technical Staff Composites Engineering<BR>Raytheon</FONT><FONT face=Verdana size=2> <BR><BR></FONT><BR>
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<TD width="57%"><FONT face=sans-serif size=1><B>Anthony Romano <anthonyr105@hotmail.com></B> <BR>Sent by: nsrca-discussion-bounces@lists.nsrca.org</FONT><FONT face=Verdana size=3> </FONT><FONT face=sans-serif size=1>01/15/2009 04:18 PM</FONT><FONT face=Verdana size=3> </FONT><BR>
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<TD></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><FONT face=Verdana size=2><BR><BR><BR><BR>Graph Tech is not for us. I am sure their stuff is well suited for the IMAC style planes that they are designed for but too heavy and way too stiff for our use. <BR>I went through their website and picked a gear based on dimension of the ES. 2+ ounces heavier and twice as thick with zero flex. Broke the gear out of my Black Magic many times when hitting small holes in the runway. Rick donated his ES gear and life has been much better. <BR><BR>Anthony<BR><BR></FONT><FONT size=3><BR></FONT>
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<FONT face=Verdana size=2><BR>From: jlachow@hotmail.com<BR>To: nsrca-discussion@lists.nsrca.org<BR>Date: Thu, 15 Jan 2009 15:59:26 -0500<BR>Subject: Re: [NSRCA-discussion] BOLLY out of business<BR><BR>Anyone have any luck with the Graph Tech RC stuff? Only experience was with some smaller electrics that worked just fine. They have carbon pants and spinners, as well.<BR></FONT><FONT size=3><BR></FONT>
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<FONT face=Verdana size=2><BR>From: tony@radiosouthrc.com<BR>To: nsrca-discussion@lists.nsrca.org<BR>Date: Thu, 15 Jan 2009 15:00:23 -0500<BR>Subject: Re: [NSRCA-discussion] BOLLY out of business<BR></FONT><FONT face=Arial color=#000080 size=2><BR><BR>Thanks, Jim. Those are $112.00 I think… about double that of the Bolly…. Not sure how that will go….. but if there are no other choices…</FONT><FONT face=Verdana size=2> <BR><BR></FONT><FONT face=Arial color=#000080 size=2><BR>Tony Stillman, President</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial color=#000080 size=2><BR>Radio South, Inc.</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial color=#000080 size=2><BR>139 Altama Connector, Box 322</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial color=#000080 size=2><BR>Brunswick, GA 31525</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial color=#000080 size=2><BR>1-800-962-7802</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial color=#000080 size=2><BR>www.radiosouthrc.com</FONT><FONT face=Verdana size=2> </FONT>
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</DIV><BR><FONT face=Tahoma size=2><B><BR><BR>From:</B> nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of </B>Woodward, Jim (US SSA)<B><BR>Sent:</B> Thursday, January 15, 2009 2:52 PM<B><BR>To:</B> General pattern discussion<B><BR>Subject:</B> Re: [NSRCA-discussion] BOLLY out of business</FONT><FONT face=Verdana size=2> <BR></FONT><FONT face=Calibri color=#004080 size=2><BR>Tony,</FONT><FONT face=Verdana size=2> <BR></FONT><FONT face=Calibri color=#004080 size=2><BR>Luiz at Net Box Hobby carrys the CA carbon gear.</FONT><FONT face=Verdana size=2> <BR></FONT><FONT face=Arial color=#004080 size=2><BR>Thanks,</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial color=#004080 size=2><BR>Jim</FONT><FONT face=Verdana size=2> </FONT><FONT face=Tahoma size=2><B><BR>From:</B> nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of </B>Tony<B><BR>Sent:</B> Thursday, January 15, 2009 2:36 PM<B><BR>To:</B> 'General pattern discussion'<B><BR>Subject:</B> [NSRCA-discussion] BOLLY out of business</FONT><FONT face=Verdana size=2> <BR></FONT><FONT face=Arial size=2><BR>I just received conformation that BOLLY has gone out of business. Unfortunately, this is a major supplier of CF landing gear and wheel pants. I have been awaiting a shipment of several items, and now it does not look like that will happen. I am working now to determine if there are any gear/wheel pants available. </FONT><FONT face=Verdana size=2> <BR></FONT><FONT face=Arial size=2><BR>The really bad thing is that I am not sure what options we have left, other than going with a kit/arf manufacturer’s gear. Ed Skorpa dropped his gear last year…</FONT><FONT face=Verdana size=2> <BR><BR><BR></FONT><FONT face=Arial size=2><BR>Tony Stillman, President</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial size=2><BR>Radio South, Inc.</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial size=2><BR>139 Altama Connector, Box 322</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial size=2><BR>Brunswick, GA 31525</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial size=2><BR>1-800-962-7802</FONT><FONT face=Verdana size=2> </FONT><FONT face=Arial size=2><BR>www.radiosouthrc.com</FONT><FONT face=Verdana size=2> <BR></FONT><FONT size=3> </FONT><FONT face=Verdana size=2><BR></FONT><FONT size=3><BR></FONT>
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