Richard,
I would assume the mono with wheel retracted would be slightly better.
Those three sticks can generate a bit more drag even with wheel pants.
Bud
----- Original Message -----
From: Sky Mail<mailto:richard.churchill-coleman@sky.com>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Tuesday, February 11, 2014 6:56 AM
Subject: Re: Europa-List: Re: Motorglider wings
Bud
Thanks for this info - I assume these were all at 1,370 lbs? I see
419PL is a trigear so I assume we can expect slightly better than -250
fpm from a mono set up at the same weight?
regards
Richard
Sent from my iPad
On 10 Feb 2014, at 01:23, Bud Yerly
<budyerly@msn.com<mailto:budyerly@msn.com>> wrote:
Just a note on sink rates in 419PL:
From my 1000 miles in the MG (copies in Europa Flyer or my website
www.customflightcreations.com<http://www.customflightcreations.com/>
accessories and tips look under techniques).
Sink Rates observed: Engine off, prop feathered from one test
flight:
90 Kts 400fpm
80Kts 300fpm
70 Kts 300 fpm
65 Kts 250 fpm
55 Kts 350 fpm trimmed nearly full aft.
Since Mod 78 makes the spar the same height from root spar to the
tip of the spar, it should not be a major problem normally. Careful
construction only thickens the spar about 1/16 of an inch. I am sorry
Dave, that your tank was put in too low. If the interior is not hard to
remove, consider moving the tank up. Yes its a mess but in a week it
could be done. I know it is easy for me to say, as one mistake and the
cost of a new tank gets figured in makes the job a real knuckle biter.
I do not do tech support for Europa any longer, but if you come to
Sun 'n Fun (Site 33 this year) you can look over what we have done to
ensure the Mod 78 spar clears controls, includes a spar cup/support for
rigging ease, and I'll show how to remove the crosslink bolts and add
countersunk screws which preserves all the structure. If you can't make
the show, then email me off line and I'll send you what I have.
I supplied Europa with drawings on modifying the flap push rod to
clear the spars as that is a real problem on the mono. Trigear is a
piece of cake. Keep the spars thin and it will work.
The extra 100 pounds the glider wing adds can make the plane a
single seat only aircraft unless you built light. It does move right
along if you go really high, but below 10,000 MSL it is basically an
economical 120 knot bird. You can really stretch the range with the
long wings.
Once the health becomes a concern, it is also quite nice to fly as a
glider with no medical.
Regards,
Bud Yerly
> From: deford.dave@gmail.com<mailto:deford.dave@gmail.com>
> To: europa-list@matronics.com<mailto:europa-list@matronics.com>
> Subject: RE: Europa-List: Re: Motorglider wings
> Date: Sun, 9 Feb 2014 06:03:17 -0800
>
<deford.dave@gmail.com<mailto:deford.dave@gmail.com>>
>
> Ron,
>
> We did switch back and forth between short and long wings,
accumulating 90
> hours on the long wings, before we heard about the Mod 78
structural
> problems and quit using them.
>
> The long wings would not fit into the fuselage of N135TD with the
taller
> spar tangs of Mod 78. Building according to the current
instructions 15
> years ago (modified shortly thereafter), our tank is set low
enough that the
> "shelf" at the top front interfered with the short wing spar
tangs. I
> heated the tank locally to deform it enough to pass the starboard
tang, and
> then had to do it again for the slightly taller long wing spars.
We would
> have to cut open the cockpit module and replace the tank in order
to gain
> enough clearance for the modified spars, which we are not prepared
to do.
> Since the long wings are of no use to us, we would be happy to
sell them at
> just about any price to someone who could use them (after applying
Mod 78,
> of course).
>
> Dave DeFord
> N135TD
>
> > It sounds like you switch back and forth between short and long
wings
> > on your XS Mono.
> >
> > Did you do Mod 78? If so how did you get your flap push-rod to
clear
> > post mod 78 spars, airbrake cable and pitch cross tube?
> >
>
>========================
>
>
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