blwfly

iTrader: (4)

http://www.turborx7.com/repics.htm

PaulFitzwarryne

Quite a comprehensive list but several omissions. There is the occasional error due to taking the information from different sources. A typical ommission for the 12A is no listing of other than the US spec motor which was detuned to make the fuel consumption and emmission look better. There were both 4p and 6p models putting out 112-115hp SAE, far more if you quote from the Mazda JIS specifications.

However a lot of work went into producing the information, it is well worth reading if you know little about the rotary engine.

I still believe the Mazda rotary should be called a Yamamoto engine rather than Wankel as it was his design team which produced a practical engine from the DKM concept. Wankel's concept of a rotary would never have worked as a commercial model.

purple82

That's not the Japanese way. They don't improve a design and add their name to it like we westerners do.

FCKing1995

iTrader: (3)

nice find

PaulFitzwarryne

Quite true! In reality it was Ernest Hoeppner who invented the rotary engine improved to a practical state by Mazda.

It was the **** party who organised funding for Wankel, a party member, to develop his impractical rotary engine, and later he went to jail as a war criminal.

blwfly

iTrader: (4)

wow thats cool..
maybe the **** wernt horrible after all lol

purple82

I have relatives, both alive and otherwise, who wouldn't agree.

BklynRX7

I thought that was chinas thing.

blwfly

iTrader: (4)

both asian samething lol

purple82

I've seen politeness and respectfulness to a degree in both China and Japan that we'd never see here.

PaulFitzwarryne

Agreed. I have worked in both. currently in the far west of China 7 hours flying from Beijing. However, I advise don't drive in Shanghai, they are so polite when they run into the back of your car.

blwfly

iTrader: (4)

what is this large rotor from did they ever make larger rotary engines for ships or somthing big



did the 21a ever get produced

85rotarypower

Another interesting tidbit, the only american manufacturer to develop a rotary engine is GM. I read somewhere that Chevy developed a rotary engine for use in the Corvette in the 70's. IIRC, it was a fairly large engine, similar to the 26B 4 rotor engine by Mazda. I believe it was never put into production because it was too expensive to produce.

blwfly

iTrader: (4)

would ov made a super rotory tho

Tranquil

iTrader: (1)

It was in the Gullwing Corvette Concept Cars. It wasn't because of the expense, but it was due to emissions and fuel consumption. 14mpg wasn't tolerable.

Bass

.

Bass

The corvette debuted as a two-rotor at the Frankfurt Auto Show and as a four-rotor at the Paris Auto Show, both in 1973.

GM was very close to producing the Chevrolet Monza in 1975. It was the impending emissions standards of '77 forced that forced GM's president, Ed Cole to spend R&D dollars on cleaning up their piston engines rather than figuring out how to clean up the new GMREs as well.

AMC was sharing the GMREs production line for their Pacer, and had to scrap those plans as a result.

blwfly

iTrader: (4)

^^that would ov been awsome..

PaulFitzwarryne

1. There are some mega marine rotaries, usually used as an electric generator to power luxury ships with quiet smooth performance.

2. The 21A, a large two rotor engine, was only produced in very limited experimental numbers in 1970-2 and tested to go into project XO20G which was a large GT with design sketches looking like the Jaguar E type hardtop. It would have looked like a large Gen 1. The idea of the engine was dropped in favor of the three rotor 15A to fit into a long bonnet in the Jag. E style. The marketing people were not as enthusiastic as the engineers to build it, and then Mazda ran out of money to take the project further.

blwfly

iTrader: (4)

do you know how many cc it was
what kinda power did it produce

chedda_j

notice that the mercedes rotary did not have a trailing nor a leading ignition and rather a single spark plug, thats rather inefficient due to the flow of our engines and the fuel that they consume, that thing must have lacked power and gasmilage.

z-beater

I have seen some rotary engines on crates that were rated at over 2000 hp. I wish that I had the pictures because they were used as a "display" model and had tags with the hp rating that they produced. They were from the John deere warehouse IIRC. Anyway the engines were the size of a pallet. No really practical for cars

I do not know if these were ever fully functioning engine but I cannot see why they would not be.

There were also some renditions of diesel types. From my understanding though these were not ever full funcioning. IIRC they could get them to start running but keeping it running was where problems occured.

chedda_j

how about a truck? Would it no be great to put one of those into a b2200 mazda truck and lift it 18 inches, 60 inch tires...hahaha that would be my favorite monster truck ever.

PaulFitzwarryne

There is a technical argument over the capacity of all rotary engines, Mazda used the lowest possible due to the tax in Japan being on capacity, the Europeans used the full capacity. Interestingly in Australia the government when you are claiming allowance for driving your own car uses the larger capacity measurement for calculating expenses. No 12A uses fuel as if it was a 1146cc engine!

However back to the question, it was 2092cc being 2x1046 and produced 220hp SAE [I have converted from JIS]. This is quite a good performance but remember it was pre-emmission control days when the 12A gave out 120hp in stock form.

rotarygod

iTrader: (1)

Those rotors in that picture are from Curtiss Wright. They even had a much larger rotor that than running on a test bench at one point. Something on the order of a 5 foot rotor. It developed over 700 hp at less than 1000 rpm. It didn't want to rev any higher due to poor flame front expansion over such a large area.

If you look closely at those rotors you'll see the edges are beveled to alter the intake port timing. It's just like is done on the Renesis rotors. This is not a new concept as you can see here it was done over 30 years ago.