Very nice design Ted. I would like to see just the chassis part of
the 3D.
Go to the web site.http://www.rotaryeng.net
On the front page scroll down to "... Down Load".
Click on Down Load and save to disk.
It is a zip file with a lot of Rhino 3D engine models.
Unzip of course.
Some of the files are in IGES format that will import directly into
Solid Works.
BTW I understand that Vaz stopped making rotaries. Is that true?
--
Paul Lamar ...No rotor no motor.
Hi Paul,
Many thanks for your reply. Have to admit that I'm ashamed that I was
unable to
find that "download" link myself. Any way thank You very much for
pointing me in
the right direction.
I attached a couple of pictures of chassis. It's a common racing GT
layout used
many times before. Monocoque end front and rear subframes. Rear
subframe is
containing roll over structure. Monocoque is made of flat honeycomb
panels - to
reduce tooling cost. My friend Paul Martin (worked for long time at
McLaren F1
team as head of composite department) is helping me great deal in
monocoque design.
I agree that moulded monocoque would look much nicer. But according to
Paul's
practical knowledge, using flat panels, structural loses are minimal.
Anyway
torsional stiffness is going to be high and overall chassis rigidity
is more
limited by subframes (front in particular) than by tub.
Front engined.... working with formula cars I'm all in mid engine
layout. But
for several reasons (it's a long sad story) this one will have to be with
engine in the wrong place. How ever I will try using transaxle mated to
engine/clutch via torque tube. This is one of the reasons why I'm using
rotary - even if engine is in front it should be well within wheelbase.
Rotary is relatively short and compact overall package. It is also
relatively
light with some power available for reasonable price.
It uses early 90's LMP cars style underbody aero. Flat bottom with
tunnels
starting within wheelbase just aft CG. I use much more conservative
diffusers
AoA - 5deg. I will try front diffuser (similar to current LMP designs)
and see
how it will work.
It's a street but track oriented car. I think that most current
sports cars
are not exactly what I would like them to be. I always wanted to have
something
that could be fun on the street (well not really a daily driver) and
feel as real
race car on track. I feel that most current sports and even exotics
are not exactly
what is needed. Practically they are too stiff and too low (4" being
typical?)for
the street and too soft and too high for race track - especially if
car is capable
of generating some appreciable downforce. I decided to get a bit
tricky with suspension. I designed it the way that it works (in terms
of geometry - roll and instant centers control, camber control,
castor, KPI etc., etc.) at two ride heights - 125 and 60mm. All one
needs to do is
relocating 8 bolts connecting bell cranks to pushrods and ARB links.
Adjust pushrod
prescribed amount. Main idea that this way he has his wheel rates 1.85
times higher
than on street and ride height reduced from 5" to 2.36". Now the car
low enough so
underbody tunnels can start to really work and stiff enough to support
vertical and
lateral loads. I do understand that most people will still consider
it's too much of
hassle. I have a little 8 nodes, 24Gb RAM cluster so I can run a
reasonably large CFD
models 18-2000000 cells usually. This allows to approximate aero
behavior to some
extent. Before we can correlate it with experimental measured results
it's more of
a trends study but still very useful. I'm more inclined towards
chassis and suspension.
May be aero. How ever engines are a black art for me. I'm only
starting to learn in
this area. In any way I better rely on someone's expertise and
experience to find out
what might work or not.
May be you could help me with some sort of advise?
VAZ is still making those engines - for helicopter usage mainly.
How ever I felt that Mazda engine is more errr... "established"?
Thank You
Ted In Moscow
PS: I just opened the models (IGES worked fine) and I'd like to ask
your permission
to ask few questions about those models?
--------------------------------------------------------------
Sure. Ask away Ted. Your English is excellent. I just wanted to say I
have been
to Moscow and it is a nice city. dos-be-don-ya. Ne pun-e-my-at
par-rus-ki.
Half ass phonetic translation :)
Paul Lamar
Hi Ted;
There are quite a few threads discussing CAD drawings at:
http://www.rx7club.com - search with "autocad", "solidworks",
"ProE", ...
http://www.rx7club.com/showthread.php?t=605734&page=6&pp=15
http://www.rx7club.com/showthread.php?t=552606&highlight=autocad
http://forums.cgsociety.org/showthread.php?t=198597&page=1&pp=15
A few older animations:
http://www.yfish.net/snkgallary/cg/rotary/rotaryengin.swf
http://www.yfish.net/snkgallary/cg/rotary/rotaryparts.swf
http://www.yfish.net/snkgallary/movie/RX-7/RX-7-2.html
I have not looked too hard for CAD drawings, there may be some
very good ones available.
Cheers
Cary
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