BlackWorksInc

I was looking up specs on the Renesis engine and comparisons between older rotaries and came across this informative website...

I want that 6 rotor, and the 21A! Ahh hell gimme all!

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

Figured you guys would like to pour through this.

PS- Look at the size of that ******* rotor! Its gotta be like 5ft tall!

PercentSevenC

Yeah, I came across that site last year. I found this pic interesting:



Check out the exhaust port on the 15A. Very short duration, and looks like it opens pretty early. Was that an attempt to reduce overlap? I wish there was a later-style 12A or 13B to compare it to. And look at the 15A and 21A rotors. There's no indentation on the faces.

BlackWorksInc

I wouldn't mind having that 15A! :P

1979rx-7

iTrader: (1)

i want that one

BlackWorksInc

What, the small one? :P

1979rx-7

iTrader: (1)

yep the small one in the background

j_tso

iTrader: (2)

He's gonna need a bigger micrometer.

BlackWorksInc

I think when you have something that big... its called a MACROmeter. :rlaugh

Wonder what the **** that goes to anyways...

warwickben

iTrader: (1)

i never heard of the bigger ones. just a guess but the 15a and 21 a they probably started to make them and realized it would be really hard to get the motor in a car. now a bus or mac truck thats be different.

PercentSevenC

There was a methane-powered compressor that had huge rotors like that. Might be what it came from.

warwickben

iTrader: (1)

i forget what i read it in its a pdf that i have and it showed a diesels rotor motor , to get the correct compression the had smaller rotors on top of a bigger rotors. think of a 12a sitting on top of a 21a. ill try to get the pic uploaded once i can get a screen shot.

BlackWorksInc

I know what you're talking about, the smaller rotor was acting as a mini compressor. I think it was being tested by Rolls Royce.

bugman1973

i set that 13g as my background 450hp thats sweet out of such a small package.

j_tso

iTrader: (2)

Can anyone point to a site that gives more info on the 13G?

BlackWorksInc

Ask and the Spawn of Demons shall answer!

Just kidding...

But here's a link I found?

http://cp_www.tripod.com/rotary/pg19.htm

Vashner

Yea size is not everything. After Mazda got the Wankel license they improved the milage from 10,000 to 100,000+ with the 12a in terms of getting the seals to last.

It took a lot of experimentation and $$$.

dean23

the big one in the pic goes to a natural gas powered engine they played with. very powerful, but not so efficient.

j_tso

iTrader: (2)

Damn, I totally forgot about that page. Thanks!

Vashner

I wonder if they ever experimented with a big rotor based engine in a submarine.

warwickben

iTrader: (1)

this isnt hunt for red October

SleepeR1st

iTrader: (1)

Look at how far the rotary engine came from the original cosmo to the now 13b-msp. The lifespans have been enhanced dramatically thus making it a plausible engine alternative on the market right now. I can't imagine where the rotary engine will stand in the next 20 years. With all this researching in new materials and technologies i await the day a rotary engine can last 300k,400k, even 500k+ miles on original internals.

Vashner

lol no but it's a loose conversation on non standard Mazda rotary engine prototypes and what not. You don't think the military looked into it? For mini subs, torpedoes, UAV's etc?

I think that would be cool to build a sub with like 10 of those big *** rotors (biggest one shown). Just for grins...

warwickben

iTrader: (1)

i was just playing. i watched that movie not that long ago and i had the same idea.

BlackWorksInc

Hmm... Submarine Rotaries? O.o New Destroyers powered by Wumbo Rotors?

Sounds good to me! :P

Joker1337

Big rotor might be for an aircraft test engine. USAF dumped a lot of money into those things back in the days of radial engines since they had fewer moving parts and were therefore more, theoretically, reliable. Fuel economy and the advent of the jet did away with that though.