4-40 or 6-32 control arms?

[rcaerobob at cox.net]

The bolts out of "toggle bolts" IS that soft, kinda crappy steel...plenty long, 6-32 so the control takeoffs fit, and they last forever....
> 
> From: Bill Glaze <billglaze at triad.rr.com>
> Date: 2005/02/14 Mon PM 12:47:21 EST
> To: discussion at nsrca.org
> Subject: Re: 4-40 or 6-32 control arms?
> 
> ED:
> A few years ago, there was quite a dialogue about this.  One of the 
> participants was Dick Hanson, a man highly respected in Pattern and 
> other disciplines.  The subject came up about a couple of individuals 
> who were looking for extra strength on aileron and elevator actuator 
> bolts.  Dick said, specifically, do not get hardened bolts or anything 
> exotic.  He said such material won't stand up under vibration nearly as 
> well as common rolled thread material, or, for that matter, some of the 
> standard Home Depot or Lowe's bolts right off the peg board.  He said 
> that the ductility is what prolonged their life; that he had never had 
> one break.  I believed him then, and still do.
> 
> Bill Glaze
> 
> Rcmaster199 at aol.com wrote:
> 
> > In a message dated 2/14/2005 12:22:29 AM Eastern Standard Time, 
> > ed_alt at hotmail.com writes:
> >
> >     I've been using 6-32 bolts to make the control horn arms for my 2M
> >     setups so far.  It seems like that might be overkill and that 4-40
> >     would suffice.  Is it OK to go lighter like this?
> >      
> >     Thanks
> >     Ed A.
> >
> > Ed I wouldn't do that especially on ailerons. I have had 4-40's snap 
> > off like twigs on 90 sized models before. The vibration kills them.
> >  
> > Matt
> 
> 
> 

Bob Pastorello, El Reno, OK, USA
rcaerobob at cox.net
www.rcaerobats.net

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