Don't know the exact answer but the designer was not killed while flying th
e original prototype. The original proto is still flying and is flown by C
harles son=2C
Ron Ligeti=2C an aeronautical engineer=2C who is reverse engineering the pr
ototype to create new open source plans that will be available on the websi
te.
According to the site=2C Charles was test flying a new larger version to be
come a kit version of the a/c.
"A channel or third wing was added to the fuselage. The bottom of the chann
el blended into the duct. Two different accounts of the purpose of the duct
have been advanced: Ron Ligeti=92s interpretation is that the ducted fan d
rew air over the channel to create a low pressure area and increase lift. R
omeo Garcia=2C a member of the original construction team=2C reports that t
he purpose was to channel more air into the duct for improved propulsion. I
t is believed that one or more of these modifications changed the stall cha
racteristics significantly=2C possibly by occluding or creating turbulence
ahead of the duct at a high angle of attack."
I have a theory that the rhino rudder as installed on the proto to yaw the
plane for landing without banking might behave unpredictably in a high angl
e stall scenario but
thats just my speculation. On the sim I have eliminated the rhino rudder a
nd gone to a retractable tri gear setup to allow more ground clearance for
a larger prop.
I can attach the sim for X-plane V7 if anyone is interested but it will hav
e to wait until I get a new hard disk for my desktop as it got hammered yes
terday!
Date: Sat=2C 27 Sep 2008 12:22:39 -0400From: peterz@zutrasoft.comTo: europa
-list@matronics.comSubject: Re: Europa-List: New tandem wheel flying wing b
iplane - this one's different!
Very slick design - but one question: As the original designer died in it i
n a "stall accident" what are the changes that you have made in the x-plane
version from his original which has made it stall-proof (ala canard)=2C wh
ile his obviously was not?
Cheers=2C
Pete
A239
On Sat=2C Sep 27=2C 2008 at 10:06 AM=2C glenn crowder <gcrowder2@hotmail.co
m> wrote:
This is an incredible concept that has not been utilized IMO. The joined
wing concept is the most efficient per NASA studies http://www.aoe.vt.edu/
design/ikelos/ as it eliminates the draggy tip vortices that plague all oth
er designs. The Stratos hasan L/D of 19/1 and the original needed flaps to
degrade the glide enough to allow a steeper landing approach. You haveeff
ective sailplane efficiency in a very compact planform. In addition the wi
ngs can be made much lighter as the joined wingat the tips adds great stren
gth. The lower wing is totally flat with no dihedral making it easy to bui
ld. The upper wing needsno twist and uses 2 deg dihedral. Other advantage
s are much stronger pilot/passengers protection due to the cage type constr
uction=2C wide tolerance of CG changes and greater tolerance for gusty cond
itions due to the short wings. On the sim it is possible to take off with t
he stick full back=2C just wait for rotation and the a/c will just climb aw
ay bobbing itsnose with full roll and yaw control. Fully aerobatic too but
pitch sensitivity is a little much for landing in this mode=2C easilycorre
cted with a pitch limiter for landing. Don't see why the concept couldn't
work for crowd killers as well as the short wingsshould allow twice as many
gates at the terminal. Very cool pic: http://www.ligeti-stratos.com/assets
/images/hg_3_big.jpg
From: craigb@onthenet.com.au
ing wing biplane - this one's different!Date: Sat=2C 27 Sep 2008 11:14:23 +
1000
How weird is that=2C the design is very close to one I was considering to s
cratch build before i started on my XS=2C glad to know it will
fly ok=2C I didnt think anyone else would like such a departure from the "n
orm"=2C my only concern was where to put the prop=2C I was thinking
about belt drive ducted fans between the two wings
-----Original Message-----From: owner-europa-list-server@matronics.com [mai
lto:owner-europa-list-server@matronics.com]On Behalf Of glenn crowderSent:
Friday=2C 26 September 2008 4:38 AMTo: europa-list@matronics.comSubject: Eu
ropa-List: New tandem wheel flying wing biplane - this one's different! Wo
uld love to build this one in my spare time. Original was 78 sq ft and 172
lbs with engine. I have scaled it up to 110 sq ft=2C built it in X-plane
with 50 hp=2C goes 160 mph=2C flies wonderful using NACA 23012 airfoil=2C s
talls at 35=2C although it just does the canard stall=2C bobbing it's nose
gently in the breeze. http://www.ligeti-stratos.com/
Glenn
Date: Thu=2C 25 Sep 2008 10:26:09 -0700Subject: Re: Europa-List: Monowheel
designs... any others out there?From: fklein@orcasonline.comTo: europa-list
@matronics.comOn Thursday=2C Sep 25=2C 2008=2C at 08:11 US/Pacific=2C rick
wrote:
Just as a matter of interest could I turn a Mono on my short=2C very bumpy
=2C grass strip (max 20' wide with no turning area) after backtracking in a
strong wind. I sometimes have trouble with my trike using full braking on
one wheel! !!...touche'...that needle do twist nicely...ouch...always nice
to recognise the depth of our commitment to our respective decisions...pit
y we tend to cloak ourselves in claims of rationality for what is=2C IMO=2C
an essentially irrational enterprise...but I love this thread which again
=2C IMO=2C celebrates the extreme flexibility of a wonderful airframe which
sees such variety (mono=2C trigear=2C conventional taildragger=2C short wi
ngs/long wings=2C Rotax=2C Soobs=2C Jabs=2C CAM/Honda=2C Smart Brabus=2C O-
200=2C and =3B -->
See how Windows connects the people=2C information=2C and fun that are part
of your life. See Now href="http://www.matronics.com/Navigator?Europa-Li
st">http://www.matronhref="http://forums.matronics.com";>http://forums.mat
ronics.comhref="http://www.matronics.com/contribution";>http://www.matroni
cs.com/c target=_blank>http://www.matronics.com/Navigator?Europa-List
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