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 new idea
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JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Fri Mar 11, 2005 7:40 am

http://rbowes1.11net.com/dbowes/index.htm

dump the camshafts
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Fri Mar 11, 2005 7:45 am

change the title, its not a new idea its been done then binned.
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Fri Mar 11, 2005 9:07 am

i didnt mean new as in revolutionary...just new to read....gawd
Chet T16
Retroholic

Joined: 12 Feb 2004
Posts: 5685

Posted: Sat Mar 12, 2005 1:02 pm

lol chris i can't decide whether i like you more cos of your knowledge or cos you're an ass
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Sun Mar 13, 2005 3:53 am

cos I'm an arse
Chet T16
Retroholic

Joined: 12 Feb 2004
Posts: 5685

Posted: Sun Mar 13, 2005 2:56 pm

Oh, ok lol
RenaultFreak
Level 1 User

Joined: 09 Mar 2004
Posts: 25

Posted: Sun Mar 13, 2005 6:55 pm

Renault was working on that, along with the ADIVI (clutch+starter+alternator) concept and the camless was binned because of the need of stronger electromagnetic systems for that...
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Mon Mar 14, 2005 12:47 am

the new citroen whatever the hell it is has the starter/alt thing. Engine stops when the cars stopped.
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Mon Mar 14, 2005 12:48 am

oh yeah i read about that...surely thats just gunna wear out quickly...
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Mon Mar 14, 2005 12:54 am

well engines used to need overhauled at 20k miles!

Things have advanced and all these things are well tested. We do have a good 75 years of development on it.

What I like less is mercedes brake by wire and steer by wire setup. Drive by wire throttles are bad enough.

I much prefer an mechanical link.
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Mon Mar 14, 2005 4:45 am

yeah i dont like it either...
huwwatkins
Site Subscriber

Joined: 10 Jun 2004
Posts: 2317

Posted: Mon Mar 14, 2005 6:21 am

So if you have an electrical fault you loose brakes and steering...great. WOuldnt the citoren use more fuel starting the engine all the time?
Soneji
Forum Moderator

Joined: 16 Feb 2004
Posts: 1356

Posted: Mon Mar 14, 2005 6:33 am

Nothin wrong with fly by wire. It is BAE systems prefered method of controlling any air borne craft. Its like everything... depends who does it
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Mon Mar 14, 2005 7:41 am

fly by wire has been done on jet engiens for ages. They are totally different to car applications. On a plane response is not an issue, on a car its a big issue.

As for the citroen starting fuel thing, they have it so its very fuel efficient.

Glasgow council have a radio campaign at the mo, if your cars running for no good rason you get a 20 quid fine.
red19rt
Site Subscriber

Joined: 24 Apr 2004
Posts: 318

Posted: Mon Mar 14, 2005 7:52 am

Quote:
Glasgow council have a radio campaign at the mo, if your cars running for no good rason you get a 20 quid fine


hmmm - I'd better watch out for that - if they mean while sitting in traffic jams they could pay off the national debt in a couple of days Laughing
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Mon Mar 14, 2005 7:55 am

when you coming to see me mate? I wanna see the new toy!
Neal
Forum Moderator

Joined: 18 Feb 2004
Posts: 7432

Posted: Mon Mar 14, 2005 10:33 am

Chris H wrote:
fly by wire has been done on jet engiens for ages. They are totally different to car applications. On a plane response is not an issue, on a car its a big issue.


Actually, most modern fighter jets are inherently unstable and could not fly without fly by wire, the flight computer constantly makes tiny control adjustments to keep the thing flying in a straight line. Response is most certainly an issue!!!
huwwatkins
Site Subscriber

Joined: 10 Jun 2004
Posts: 2317

Posted: Mon Mar 14, 2005 11:56 am

I can see it now...fly by wire cars controlled by a computer Laughing
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Mon Mar 14, 2005 1:10 pm

neal...i saw a program on some test plane...with the wings facing forwards instead of swept back....apparently that would never have been possible to fly without computer aid....just far to unstable for any man to have fast enough reactions to control...
Neal
Forum Moderator

Joined: 18 Feb 2004
Posts: 7432

Posted: Mon Mar 14, 2005 1:23 pm

That would have been either the NASA X-29 or the soviet Sukhoi S-37 Berkut. Forward swept wings have all the characteristics of 'normal' backwards swept wings, plus several advantages such as better low speed handling, lower stall speed and less trailing vortices etc. They're not necessarily unstable, in fact i have built models with forward swept wings, that were quite docile. For military aircraft though, natural instability is desirable, because from that you get manoeuverability. Its all down to the specifics of the overall design.

The only problem is getting them to stay on the aircraft and not tear off (structural divergence) Smile As any slight deflection of the wing means that the airflow is trying to twist it round even more. These aircraft have only become possible due to extremely advanced composite materials and FEA design.

The X-29
Image

The S-37
Image

but anyway...er....renaults.... Very Happy
Wicked Neo
FCS Event Manager

Joined: 04 Jan 2005
Posts: 3680

Posted: Mon Mar 14, 2005 1:38 pm

huwwatkins wrote:
I can see it now...fly by wire cars controlled by a computer Laughing


as long as those computers dont run 'windows' we should be fine

Insurance claim: my car swerved into the fast lane of the M25 causing me to hit the the very expensive porsche cos some hacker kiddie hacked my windows OS and used my car like a £25 maplins remote control car special.
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