[NSRCA-discussion] BOLLY out of business

Fri Jan 16 08:44:20 AKST 2009

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.

To: jpavlick at idseng.com; nsrca-discussion at lists.nsrca.orgFrom: gfowler at raytheon.comDate: Fri, 16 Jan 2009 11:17:50 -0600Subject: Re: [NSRCA-discussion] BOLLY out of businessJohn 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?Gray FowlerSenior Principal Chemical EngineerRadomes and Specialty AperturesTechnical Staff Composites EngineeringRaytheon 

John Pavlick <jpavlick at idseng.com> Sent by: nsrca-discussion-bounces at lists.nsrca.org 
01/16/2009 11:13 AM 

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Re: [NSRCA-discussion] BOLLY out of business

Gray,  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. If Pattern planes were designed with the gear location further back, we wouldn't need swept gear.   John Pavlick --- On Fri, 1/16/09, Gray E Fowler <gfowler at raytheon.com> wrote: From: Gray E Fowler <gfowler at raytheon.com>Subject: Re: [NSRCA-discussion] BOLLY out of businessTo: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>Date: Friday, January 16, 2009, 4:37 PMWhy do you prefer sweep?Gray FowlerSenior Principal Chemical EngineerRadomes and Specialty AperturesTechnical Staff Composites EngineeringRaytheon 

Richard Strickland <pamrich47 at hotmail.com> Sent by: nsrca-discussion-bounces at lists.nsrca.org 01/15/2009 05:17 PM 

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If I were to complain about anything on Matt's gear (I'm not) I would prefer a little 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.RS

To: nsrca-discussion at lists.nsrca.orgFrom: gfowler at raytheon.comDate: Thu, 15 Jan 2009 16:56:48 -0600Subject: Re: [NSRCA-discussion] BOLLY out of businessAnthony 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. 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?Gray FowlerSenior Principal Chemical EngineerRadomes and Specialty AperturesTechnical Staff Composites EngineeringRaytheon 

Anthony Romano <anthonyr105 at hotmail.com> Sent by: nsrca-discussion-bounces at lists.nsrca.org 01/15/2009 04:18 PM 

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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. 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. Anthony

From: jlachow at hotmail.comTo: nsrca-discussion at lists.nsrca.orgDate: Thu, 15 Jan 2009 15:59:26 -0500Subject: Re: [NSRCA-discussion] BOLLY out of businessAnyone 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.

From: tony at radiosouthrc.comTo: nsrca-discussion at lists.nsrca.orgDate: Thu, 15 Jan 2009 15:00:23 -0500Subject: Re: [NSRCA-discussion] BOLLY out of businessThanks, 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… Tony Stillman, President Radio South, Inc. 139 Altama Connector, Box 322 Brunswick, GA  31525 1-800-962-7802 www.radiosouthrc.com 

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Woodward, Jim (US SSA)Sent: Thursday, January 15, 2009 2:52 PMTo: General pattern discussionSubject: Re: [NSRCA-discussion] BOLLY out of business Tony, Luiz at Net Box Hobby carrys the CA carbon gear. Thanks, Jim From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of TonySent: Thursday, January 15, 2009 2:36 PMTo: 'General pattern discussion'Subject: [NSRCA-discussion] BOLLY out of business 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.   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… Tony Stillman, President Radio South, Inc. 139 Altama Connector, Box 322 Brunswick, GA  31525 1-800-962-7802 www.radiosouthrc.com  

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