Hi Peter and Lance - I have attached the X-plane V7 Stratos .acf file. I s
ent the files to your personal email as Matronics will not accept anything
but basic .jpg=2C .bmp=2C .pdf type
files. If anyone else would like them=2C email me off list. The designati
on indicates 110 sq ft and 50 hp. The wings use the NACA 23012 low moment
.afl file=2C vstab uses NACA 0012 symmetrical .afl. On X-plane V7=2C the .
afl files used on a particular .acf file need to be in the same directory w
here the .acf file is located.I have added a bellyboard instead of flaps so
this uses the bellybord.afl file. On the version I have created=2C all co
ntrol surfaces are on the lower wing=2C making it much easier to build. Af
ter much experimentation I found that flaps really aren't necessary as they
only lowered stall speed a mph or so and there were four of them=2C adding
a lot of weight and complexity. The bellyboard is very effective at glide
path control=2C being much lighter and easier to construct. Just don't fo
rget to retract it in a go-around or touch and go! There is some kind of bu
g with the engine start as it won't start with the throttle at idle. Advan
ce the throttle about half and then hit the ignition key with your mouse.
Leave thebrakes on or else the plane will rocket forward! Set about two li
nes of up trim for TO. You don't have to pull any back stick as the plane
will rotate automatically about 80 kts=2C40 kts if you pull hard back stick
! The a/c will begin a slow long period pitch oscillation until you stabil
ize it with the stick. Raise the gear and as you climb=2C start reducing u
p trim.Stabilize the climb about 100 kts then at altitude=2C feed in down t
rim a bit at a time. Top speed will stabilize at 160 kts but it takes quit
e a while=2C the trim becoming extremelysensitive. Rolls are very axial=2C
loops are easy. The tip rudders work but there's a bug in that I can't fi
gure out how to make just one rudder deploy outwards while the other remain
s neutral. They both move together currently both left and right but still
work. They are really never needed in flight except to enter a spin as th
e a/c stays coordinatedall by itself. Try slowing down to 40 kts by reduc
ing throttle and adding up trim. At stall=2C the a/c will just bob its nos
e gently. You will still have roll control=2C although a bit sluggish.For
landing slow to 70 kts in the pattern=2C lower the gear=2C deploy the belly
bord - the nose will pop up briefly - then stablilze at about 65 kts. Leve
l out at the threshold and justgradually pull back stick until the mains hi
t then lower the nose. Don't pull too much back stick or it might take off
again briefly followed by a hard bounce. Very easy to fly overall=2Caerob
atic and mild mannered. I haven't got it to do anything nasty but maybe so
meone else can! I would be interested in any feedback. Hoping to use the
Axiro XR-50 engine=2C very light at 15 Kg=2C with a turbo'ed version used
recently on a world altitude record breaking flight on a powered PPG=2C fly
ing neatly overMt Everest in the process!
Glenn
Date: Sat=2C 27 Sep 2008 17:06:56 -0400From: peterz@zutrasoft.comTo: gcrowd
er2@hotmail.comSubject: Re: Europa-List: New tandem wheel flying wing bipla
ne - this one's different!
Hi Glenn=2C
Thanks for the clarification=2C and I would definitely be interested in the
x-plane model. I'm hoping it will work on V9 - I think it should.
Cheers=2C
Pete
On Sat=2C Sep 27=2C 2008 at 1:42 PM=2C glenn crowder <gcrowder2@hotmail.com
> wrote:
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=2CRon Ligeti=2C an aeronautical engineer=2C who is reverse engin
eering the prototype to create new open source plans that will be available
on the website. According to the site=2C Charles was test flying a new lar
ger version to become a kit version of the a/c. 'A channel or third wing w
as added to the fuselage. The bottom of the channel blended into the duct.
Two different accounts of the purpose of the duct have been advanced: Ron L
igeti's interpretation is that the ducted fan drew air over the channel to
create a low pressure area and increase lift. Romeo Garcia=2C a member of t
he original construction team=2C reports that the purpose was to channel mo
re air into the duct for improved propulsion. It is believed that one or mo
re of these modifications changed the stall characteristics significantly
=2C possibly by occluding or creating turbulence ahead of the duct at a hig
h angle of attack.' I have a theory that the rhino rudder as installed on t
he proto to yaw the plane for landing without banking might behave unpredic
tably in a high angle stall scenario butthats just my speculation. On the
sim I have eliminated the rhino rudder and gone to a retractable tri gear s
etup 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 have to wait until I get
a new hard disk for my desktop as it got hammered yesterday!
Date: Sat=2C 27 Sep 2008 12:22:39 -0400From: peterz@zutrasoft.com
ing wing biplane - 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-Listttp
://forums.matronics.com=_blank>http://www.matronics.com/contribution
Want to do more with Windows Live? Learn '10 hidden secrets' from Jamie. Le
arn Now
target=_blank>http://www.matronics.com/Navigator?Europa-Listttp://forums
.matronics.com=_blank>http://www.matronics.com/contribution
Stay up to date on your PC=2C the Web=2C and ymsnnkwxp1020093185mrt/direct/
01/' target='_new'>See Now
================
See how Windows Mobile brings your life together=97at home=2C work=2C or on
the go. See Now
Want to do more with Windows Live? Learn =9310 hidden secrets=94 from Jamie
. Learn Now
_________________________________________________________________
See how Windows connects the people=2C information=2C and fun that are part
of your life.
|