on the subject of weight savings, I can't help but notice how heavy the
mono swingarm is. I noticed in Germany one builder had put many lightening
holes in it (among many other mods). I had also wondered if indeed it was
over-designed and could use some strategically placed holes. Is that the
only builder who has lightened it? Has anyone done any math on that heavy
piece?
Cheers & thx,
Pete
A239
On Tue, Jan 28, 2014 at 8:34 AM, Kevin Klinefelter <
klinefelter.kevin@gmail.com> wrote:
> klinefelter.kevin@gmail.com>
>
> 833 lbs is fantastic. My XS Mono/914/Airmaster came out weighing 50 lbs
> more! Thinking about that lighter mono wheel and brake to shave off, how
> much was it?
> Kevin
>
> > On Jan 28, 2014, at 4:37 AM, "David Joyce" <davidjoyce@doctors.org.uk>
> wrote:
>
>
> >
> davidjoyce@doctors.org.uk>
> >
> >
> > Grahah, Aother point is that although Roger Targett probably did spray
> 20 lbs of gel coat on my plane I am certain that I wet & dry sanded more
> than half of that off, and my 914 mono has ended up as one of the lighter
> ones around (at 833lbs) in spite of a very full range of kit. David
> >
> > GRAHAM SINGLETON <grahamsingleton@btinternet.com> wrote:
> >> Having re read what I said I take your point,
> oversimplification.Nevertheless it's surface imperfections
> >> ie any bump or hollow more than a couple of thou over a 2" length is
> too much. 2000
> >> grit finish is probably as good as it needs for performance.
> >> Bird's wings intrigue me, there are incredibly efficient. I'd love to
> see a comparison of the fuel burn
> >> of an albatross or an arctic tern with a Europa. Grey Lag goose might
> be interestin too. How far do they fly without refueling?
> >> Point being I guess boundary layer control is everything, vortex
> generators had an amazing effect on my Long EZ,
> >> lowered the stall by 9 kts and little effect at higher speeds. (didn't
> get chance to measure it but the mod developer claims only 2kts
> >> penalty. Graham
> >> ________________________________
> >> From: David Joyce <davidjoyce@doctors.org.uk>
> >> To: europa-list@matronics.com Sent: Tuesday, 28 January 2014, 9:39
> >> Subject: Re: Europa-List: Cowl mods for front belt driven alternator
> davidjoyce@doctors.org.uk>
> >> Graham, Are you sure? You usually are, but competition gliders are
> produced with amazing attention to their finish - gel coat rubbed down
> progressively to 2000 grit and then polished with hard wax. We share their
> laminar flow aerofoils which are said to be highly sensitive to surface
> imperfections.
> >> Regards, David Joyce G-XSDJ (with gel coat finish!)
> >> GRAHAM SINGLETON <grahamsingleton@btinternet.com> wrote:
> >>> The lightest Mono I know of was less than 750lbs. A showroom finish
> must weigh 20 lbs
> >>> at least and adds nothing to performance.
> >>> Graham
> >>> ________________________________
> >>> From: Greg Fuchs <gregoryf.flyboy@comcast.net>
> >>> Hmm.. some HAVE paid more attention to the weight during the build, and
> >>> still end up bloated.. 860 is not too bad, IMO.
> >>> I'll be trying to use lower power items, such as external LED lights
> and
> >>> EFIS. Since none of them pass Burt Rutans qualification of staying in
> the
> >>> air when tossed there, I will now be adding helium-balloon ballast to
> the
> >>> ship to compensate for it. :)
> >>> Thanks again=
> >
> >
> >
> >
>
>
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