Aren't Mazdas still using rotary engines to this day? Speaking ot Olds
Toronado there was a great photo of Croft Trailers framed on the wall down on
Navigation years ago. There was a Toronado.....NO BACK WHEELS, hooked up to
trailer and it toured the country this way the trailer held up rest of car I
guess, too much physics for me. I used to rent trailers there for swap meets
and was always facinated by that photo.
----- Original Message -----
Couple o'
things.
The wankel rotary isn't a 2 cycle
OR a 4 cycle, they are Wankel cycle.
(In fairness, I tend to think of
it as 2 stroke, but that's not accurate ;-)
Mazda used the rotary in a full
lineup of cars including the RX-7 and their various boxy japanese
sedans. After the various apex seal problems, all the sedans dropped
the rotary for the mazda 4 cylinder with the RX-7 being the lone rotary in
production at all for a while.
2 stack rotaries are
commonplace. Even singlestack rotaries are used, but not in cars --
you're talking all of 75 hp or so.
3 stack are common, racing and
road cars, but not domestically. They are usually ordered in from
Australia or somewhere. Can't make EPA, you know
;-)
4 stack are, to my knowledge, not
used anywhere except experimentally on stationary applications like their
"spark assisted diesel" project for electrical generation. Yup... a
wankel running diesel fuel... except "spark assisted" -- talk about
marketing spin.
The 4 stack has a lot of the same
kind of crank probs a straight 8 can have. Too much load over too long
a shaft, basically.
Among the many reasons the rotary
didn't take off were those crummy apex seals -- ironically, now that there's
so few of them, they've come out with good seals and the problem is
gone.
Also, they never did get good
mileage. Ever. That's why I think of them as a 2 stroke engine
-- they chugalug the fuel.
The new Mazda Renesis (?) is a
production rotary.... 3 or 4 years now? And no, you don't see
many of them.
Just in case anyone was gonna lose
any sleep over a stupid little japanese engine.
Oh... and if you run one without a
muffler, it makes absolutely the nastiest, loudest, and most-annoying sound
I have EVER heard from an engine. Talk about something that would
invoke road-rage... that'd be it.
L.
Your exactly right that is why they ended up with the 258 and later
v8's. I am sure they were going to be 2 bangers with two of those triangle
things in them. They say you can get them with 3 or 4 but they are used
mostly for racing because they are so expensive. The Mazda xr7 was the
only car I knew of that used them in mass production. While they are an
old design I remember when they first were promoted in the 70's they were
suppose to be what all cars would have in them in a few short years. They
died. I can also remember when the Corvair came out and the VW was in its
heyday that a lot of people were saying all cars would be rear engine cars
shortly. It died too. I can also remember in 68 when Olds brought out a
front wheel drive car that they said it would take over. Well it did but
not like the Tornado . They had straight engines with a belt going to the
transaxel. Not like the sideway engines we have today.
Terry
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