I've already tried a vernier type throttle arrangement. It was a pain and
not as comfortable as the Factory style. I had thought that the Factory
version would not be capable of very fine adjustment, but in use this has
not been a noticeable effect.
The problem with the vernier was that its internal mechanism allows the
handle to screw in and out along a loose spiral of thick wire (a coil
spring, basically). This spiral has some springiness and give, which allows
the carb springs to pull the throttles open slightly against this spiral.
The net effect is that the throttle has to be held fully closed, otherwise
very flat landings result.
Of course, the throttle could be wound-out on the spring to a fully closed
position, but as soon as the aircraft touched down it would slip and the
throttle open slightly, making for landings of great interest (to outside
observers).
Duncan McF.
----- Original Message -----
From: "Steve Hagar" <hagargs@earthlink.net>
Subject: Re: Europa-List: Throttle cables
>
> I went a different route, I dispensed with the built up throttle box. I
> built up the center console slightly and installed a verneir type
throttle.
> Hence no throttle creep. The single cable goes up to the firewall and I
> manufactured a single to dual cable yoke the resides on the face of the
> firewall. The double cables are now extremely short and all of the
working
> mechanism is now on the front face of the firewall. There is nothing
> pertaining to the throttle that needs to be worked on under the console or
> in the wheel. It is really clean and open down there. I did this after
> seeing an installation that Phoenix Composites did on another Europa. I
> haven't put this in service yet to operationally check it out. Busy
working
> on a trailer to bring the plane somewhere where I start it up and do
engine
> checks.
>
> Steve Hagar
> A143
> Mesa, AZ
>
>
> > [Original Message]
> > From: Duncan McFadyean <ami@mcfadyean.freeserve.co.uk>
> > To: <europa-list@matronics.com>
> > Date: 5/17/04 11:53:43 AM
> > Subject: Re: Europa-List: Throttle cables
> >
> <ami@mcfadyean.freeserve.co.uk>
> >
> > The problem I had was getting the lever to turn on the nylon at all
(this
> > was with nylon washers cut from sheet).
> > Instead, the steel washers preferred to turn under the head of the nuts.
> > Solved by welding the nuts to the washers and Loctiting the nuts.
> >
> > So far so good; just hoping the whole thing doesn't have to be adjusted
> too
> > frequently. Emergency wooden wedge (2.5g weight) carried in cockpit to
> > prevent throttle creep, if needed!
> >
> > Duncan McF.
> > ----- Original Message -----
> > From: "Graham Singleton" <graham@gflight.f9.co.uk>
> > To: <europa-list@matronics.com>
> > Subject: Europa-List: Throttle cables
> >
> >
> > <graham@gflight.f9.co.uk>
> > >
> > > >From: "Duncan McFadyean" <ami@mcfadyean.freeserve.co.uk>
> > > >Subject: Re: Europa-List: Throttle cables
> > > >
> > > ><ami@mcfadyean.freeserve.co.uk>
> > > >
> > > >Changed mine for teflon lined outers with Stainless inners.
> > >
> > >
> > > >Getting the standard throttle box to work properly is another story.
> > > >
> > > >Duncan McF.
> > >
> > > Duncan
> > > One way to solve that last point is to accurately restrain the
friction
> > > pads, scrap the nylon washers and use nylon sheet and devise a way to
> stop
> > > it turning randomly. Square pieces sliding (sideways) on the side of
the
> > > throttle box works.
> > > Graham
> > >
> > >
> >
> >
>
>
|