rotarygod

Here's a reality check. I'm a mod and you aren't. I like the thread.

rotarygod

They were about pictures of a car for sale, an Altima vs an RX-8, and a Vette.

"He" also shares the same IP address with a "she" who spends her time between Arizona and Oregon. "She" also only has a few posts but none of them were anywhere that would have been seen by most. "He" doesn't have any personal information on the site but "she" does.

Former A4'er

I am a newb when it comes to rotory engine cars but I have to say I have learned a lot from this thread even if it wasn't always on topic, I don't care there are a lot of smart people posting valuable info.

robertdot

We all read it...

mlx8

At 194 pages Tolstoy may not yet have to worry about coming up with an addendum to War & Peace, but .... , IMO it is a little hard to figure when, if ever there might be an end in sight. I worry I may have to move along to some other form of transport with a bit more bhp before this ever sorts itself out ..... the OrscheP Cayman is (unfortunately) starting to look pretty attractive except for its entry price point.

Come on RP! As Pogo is alleged to've said, "We have met the enemy, and he is us."

RP, save us from ourselves

Moostafa29

The world wasn't created in a day. It takes time to fabricate this sort of thing.

Richard Paul

iTrader: (5)

Name dropper

guitarjunkie28

how fast can the compressor blades safely spin?

Richard Paul

iTrader: (5)

50,000 RPM. More complicated then that because of "Mach number effects" meaning some parts of the blade go sonic before the tip speed does. Anyway for your answer 50k is a good number.

guitarjunkie28

oh ok...

i was kinda wondering about fitting a compressor section onto a turbo back side to take advantage of the adiabatic efficiency of the axialflow, without the parasitic loss from the belt.

but i think too much.

globi

^and the turbo spooled up by the time the cows came home.
(...the inertia of 4 or 5 axial flow wheels is probably way higher than 1 radial flow wheel - not to mention the added complexity).

(Btw the very first turbocharger patent from 1905 shows an axial flow compressor and an axial flow turbine.)

belkjz

how do parts of the blade go sonic before the tips?

Richard Paul

iTrader: (5)

The tip speed is a function of the radius. The air speed is a function of fluid dynamics. The air goes around and through the blades so it travels further. To complicate things the air goes faster on top of the blade then the bottom. Then you get into radius at the root and air leakage etc. etc. So there are numorous factors that combine to make Mach Effects.

In WWII at the end of the development of piston engine fighter planes pilots were having problems in high speed dives. While they were a long way from sonic but there were some parts of the wing surfaces that were seeing high enough speed to pressure the control surfaces as they were to hard for manual manipulation.


Mlx8, It just dawned on me that you wasted your time in school studying lit when you should've been off campus with the rest of us drinking and chasing girls.

guitarjunkie28

never hears of that before. got a link to the info? search came out negative.

rotarygod

I do have to say that if the axial flow only takes about 20 hp to drive to make it's rated power, that's a far smaller load than any turbo takes by restricting off the exhaust flow the way they do. That's pretty damn good. There is no free power.

globi

On the patent you could clearly see how the turbo from 1905 was built.
Here's an article about its invention http://www.gizmag.co.uk/go/4848/1/
Unfortunately the picture of the patent is gone.

It is not surprising though. Parsons steam turbines were built in the 1880's already and they were axialflow type. Radial flow wasn't well known or at least not as popular back then.

Here's a picture from an axial flow steam turbine wheel from 1884:

http://www.history.rochester.edu/ste...ons/part1.html

Richard Paul

iTrader: (5)

Funny thing, see post 5 page 1 this thread.

BTW Parsons first patent on axialflow compression in late 1800's was wrong. However His 1910 patent was the basis for axialflow development thereafter. I guess the guy knew his ****. Pity he's not around to see what has happened with his work.
His discovery was that steam turbine blades worked great because the constant energy being supplied by expanding gases away from the blade surface. This was not the case in compressing against the surface. His first patent was just using turbine design in a compressor which didn't work well. Defining the difference in 1910 formed the basis for future development.

guitarjunkie28

cool stuff. i got a few weeks of homework now

SSJ 909

50,000 damn!

crimson-rain

me too. been following (trying to follow) this thread for a while and have LEARNED A CRAP LOAD!!! I hope learn enough by the time this SC kit is done.

Sorry if this is a dumb question, but are there ways to further minamize this parasitic loss without loss of charger efficiency?

eclps0

is there a release date yet. not even a set date but a time frame

Nemesis8

iTrader: (3)

It will happen - he is commited, but asking for a date, well make sure Richard has a new dress to wear, and take him to the best place in town.

guitarjunkie28

i should put one on my fd

Spin9k

Here's a cheery little story that pops into my mind, esp it being spring of the 3rd year after the RENESIS. RP I appreciate all your valiant efforts and applaud all others (so many it seems) who are also laboring as well, but a bit of comic tragedy is good for the soul, yes?

[{} being mine and apologies for blasphemous story editing of SB's plot]

For those who have studied the original play it does seem eerily appropriate for us who keep returning to all these threads. I'm always ready to keep coming back whenever I get the 'new post' call ever hopeful, and it seems I always find ... well... not to give away the story, read on.

"The plot of Samuel Beckett's Waiting for Godot {major power upgrades or MPUs for short} is simple to relate. Two tramps {aka forum members or FMs for short} are waiting by a sickly looking tree {aka forum thread] for the arrival of MPUs. A young boy arrives to say that MPUs will not come today, but that he will come tomorrow. They do not come and the two FMs resume their vigil by the tree, the only symbol of a possible order in a thoroughly alienated world.

The unity of place is a muddy plateau with one tree, a kind of gallows which invites the FMs to consider hanging themselves. This place is any place. It is perhaps best characterized as being the place where MPUs are not. As the play unfolds we come to realize that MPUs are not in any place comparable to the setting of the play. They will not come out of one place into another. The unity of time is two days, but it might be any sequence of days in anyone's life. Time is equivalent to what is announced in the title: the act of waiting.

Time is really immobility, although a few minor changes do take place during the play. The act of waiting is never over, and yet it mysteriously starts up again each day. The action, in the same way, describes a circle. Each day is the return to the beginning. Nothing is completed because nothing can be completed. The despair in the play, which is never defined as such but which pervades all the lack of action and gives the play its metaphysical color, is the fact that the two FMs cannot NOT wait for MPUs..."

Red Devil

I always liked that one...

I get the feeling that RP is more waiting/working for ECU management at this point as much as anything else...could be wrong, of course...