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Too big to fail
 
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"You go to the track with the Porsche you have, not the Porsche you wish you had."
'03 E46 M3
'57 356A
Various VWs
Old 07-20-2019, 10:07 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97541 (permalink)
Too big to fail
 
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"You go to the track with the Porsche you have, not the Porsche you wish you had."
'03 E46 M3
'57 356A
Various VWs
Old 07-20-2019, 01:35 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97542 (permalink)
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Quote:
Originally Posted by john70t View Post
WW 1 Trenches, Craters? The Somme?

Present day...?

Last edited by tcar; 07-20-2019 at 03:05 PM..
Old 07-20-2019, 03:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97543 (permalink)
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^^^^...https://www.dailymail.co.uk/news/article-2457451/WWI-battlefield-photos-look-today.html
Old 07-20-2019, 04:10 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97544 (permalink)
Run smooth, run fast
 
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Old 07-20-2019, 04:14 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97545 (permalink)
A Marchand fan before you
 
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Quote:
Originally Posted by widebody911 View Post
he's not dead, he's just sleeping

random:

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Old 07-20-2019, 05:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97546 (permalink)
 
Get off my lawn!
 
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Old 07-20-2019, 06:13 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97547 (permalink)
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20+ year PCA member

Many Cool Porsches, Projects& Parts, Vintage BMX bikes too

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Old 07-20-2019, 06:49 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97548 (permalink)
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20+ year PCA member

Many Cool Porsches, Projects& Parts, Vintage BMX bikes too

http://www.bvdmotorsports.com
Active Rennlist Member.
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See blog for my For Sale & Wanted List.
http://www.914club.com/bbs2/index.php?automodule=blog&blogid=337&
Old 07-20-2019, 07:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97549 (permalink)
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Byron

20+ year PCA member

Many Cool Porsches, Projects& Parts, Vintage BMX bikes too

http://www.bvdmotorsports.com
Active Rennlist Member.
http://members.rennlist.com/racerbvd/
See blog for my For Sale & Wanted List.
http://www.914club.com/bbs2/index.php?automodule=blog&blogid=337&
Old 07-20-2019, 08:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97550 (permalink)
Get off my lawn!
 
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Glen
43 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
Old 07-21-2019, 08:14 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97551 (permalink)
Too big to fail
 
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"You go to the track with the Porsche you have, not the Porsche you wish you had."
'03 E46 M3
'57 356A
Various VWs
Old 07-21-2019, 08:45 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97552 (permalink)
Get off my lawn!
 
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Some of the cheap smaller boats



Jim, is this like your sail boat?
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Glen
43 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
Old 07-21-2019, 10:26 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97553 (permalink)
Too big to fail
 
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"You go to the track with the Porsche you have, not the Porsche you wish you had."
'03 E46 M3
'57 356A
Various VWs
Old 07-21-2019, 12:22 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97554 (permalink)
Cars & Coffee Killer
 
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Old 07-21-2019, 03:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97555 (permalink)
I see you
 
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Quote:
Originally Posted by widebody911 View Post
^why?

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Old 07-21-2019, 03:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97556 (permalink)
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https://en.wikipedia.org/wiki/Contra-rotating_propellers

Old 07-21-2019, 04:33 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97557 (permalink)
You do not have permissi
 
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Join Date: Aug 2001
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Quote:
Originally Posted by flatbutt View Post
^why?
Simple answer (or probably WAG) from another layman:
Is that "stall" is the lack of airflow....due to low speed or turbulence....over both the airplane wings or props.

The blades can't grab air in a complete vacuum or very high altitudes.
When this happens everything becomes a rock.

With counter-rotating props the front blades act as sort of a turbo for the rear blades.
Instead of being enveloped in nothingness, they now work in a pre-pressurized envelope.

So regardless of conditions:
-slow and low -vs.- high and fast
-either the front set or the back set should be able to pull at full capacity...at the slight cost of inefficiency with the other set.

Last edited by john70t; 07-21-2019 at 05:54 PM..
Old 07-21-2019, 05:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97558 (permalink)
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forgot pic
Old 07-21-2019, 05:10 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97559 (permalink)
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Byron

20+ year PCA member

Many Cool Porsches, Projects& Parts, Vintage BMX bikes too

http://www.bvdmotorsports.com
Active Rennlist Member.
http://members.rennlist.com/racerbvd/
See blog for my For Sale & Wanted List.
http://www.914club.com/bbs2/index.php?automodule=blog&blogid=337&
Old 07-21-2019, 05:12 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #97560 (permalink)
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