Tonight's Dumb Idea...

[jim ivey]

Ok enough. Have you ever held a .049 in you hand,between your fingers while 
it was running.Multiply this vibration by 280 times and that is what the 
servo feels that is mounted on the mount of a YS 140.
I'm dodging now.

Jim Ivey



jivey61 at msn.com





>From: "Jeff Hughes" <jghughes at insightbb.com>
>Reply-To: discussion at nsrca.org
>To: <discussion at nsrca.org>
>Subject: Re: Tonight's Dumb Idea...
>Date: Tue, 17 Feb 2004 19:12:25 -0500
>
>Makes me wonder why you bother to soft mount the engine if the servo can
>live bolted to the mount?
>
>----- Original Message -----
>From: "Bob" <lomcevak at tin.it>
>To: <discussion at nsrca.org>
>Sent: Monday, February 16, 2004 8:02 PM
>Subject: Re: Tonight's Dumb Idea...
>
>
> >
> >
> > > >The servo sure shakes a lot, but the relative motion between the
> > > >servo arm ant the engine is none. So the servo lasts longer and the
> > > >servo response to the engine is much more precise.
> > >
> > > How is it that the servo lasts longer being subjected to the engine
> > > motion and the associated dynamics?  I can see where the wear on the
> > > servo and throttle arm from the throttle pushrod may be reduced but
> > > that's a minor problem.
> > >
> >
> > The vibrations the servo is given have, of course, much greater 
>amplitude,
> > and this could let you think that it suffers more.
> >
> > But what a servo really suffers of is the stress driven through his
>rotating
> > arm.
> > The gears and the pot wear is directly related to the impulses to the 
>arm.
> >
> > The more the acceleration of the connecting rod, the more wear to the
>servo.
> >
> > With the servo virtually still compared to the engine, the servo arm is 
>no
> > loaded at all, and the high amplitude - low accelleration forces the 
>servo
> > is undergone to, is harmless to the servo.
> >
> > Anyway, in a 4 years time, no one servo failure I know of.
> >
> > PS: It might be possible for me to make some mistakes with my english.
> > If I write something wrong, please let me know.... ;-)
> >
> > Best Regards
> >
> > Roberto Bracchi - Modelcompositi
> >
> > =====================================
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> > # discussion-request at nsrca.org
> > # and put leave discussion on the first line of the body.
> > #
> >
>
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