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Subject: Finding The Sweet Spots
SYSOP    7/2/2013 5:12:56 AM
 
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vahitkanig       7/2/2013 10:22:45 AM
What  I like  at C-130J is  that ; her  turbo prob  engine .
Turbo  prop more  dependable  than  jet  engine  because  just  incase  any  technical  problam  jet  engine  propeller  engine  will help  plane  survive.
Thats  why  some  passenger plane  still use  turbo prop.
Another  reason why turbo prop might  be  important  military  cargo plane ; most  manpads ,SAM  missiles  work with  proximty  fuse  and  continious  rod war  head whic contains 3000 pieces tungsten pellets  can  spread  200 meter  radius.
Thats  tungsten  pellets  spread from  missile  head ,to engine  intake  may  cause  engine  failure at least  cause  plane  lost  her  altitude.
So  probeller  blade  may  cover  jet  engine  intake .
 
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bikebrains       7/2/2013 11:39:58 AM
"The armor was placed in those locations where there was no damage as that’s where shell fragments obviously hit in all the thousands of bombers that were shot down." should read " The armor was placed in those locations where there was damage as that’s where shell fragments obviously hit in all the thousands of bombers that were shot down."
 
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Drill SGT    Actually No   7/2/2013 9:41:54 PM
Let me try it another way.
 
Flak pretty much hits planes randomly.  The looked at the planes that came back with hits on them and make an assumption that the places hit, are non critical.
 
They assume that planes hit where none of the surviving planes were hit, didn't survive.
 
For a simple example, of the millions of hits on thousands of surviving planes, I doubt that many were center line on the windshield .
 
another example:  not many hits on the engines of twin engine bombers.  quite a few more engine hits on 4 engine bombers, that came home.
 
see the pattern?  They did....
 
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WarNerd       7/3/2013 5:06:54 AM
For once bikebrains you were wrong. I do appreciate your grammar and spell checking though.
 
Why don't you correct ever Vahitkanig ?
 
Ha Ha
Well, first he would have to figure out what Vahitkanig is trying to say, and then deal with the fact that much of what Vahitkanig says just isn’t true.
 
After he does that then it gets difficult.
 
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marat,jean       7/3/2013 5:29:29 AM
The modern turboprop is usually a turbojet with a PTO and a propeller so I do not understand the logic.
 
Warnerd is quite correct about vahitkanig. 

What  I like  at C-130J is  that ; her  turbo prob  engine .

Turbo  prop more  dependable  than  jet  engine  because  just  incase  any  technical  problam  jet  engine  propeller  engine  will help  plane  survive.

Thats  why  some  passenger plane  still use  turbo prop.

Another  reason why turbo prop might  be  important  military  cargo plane ; most  manpads ,SAM  missiles  work with  proximty  fuse  and  continious  rod war  head whic contains 3000 pieces tungsten pellets  can  spread  200 meter  radius.

Thats  tungsten  pellets  spread from  missile  head ,to engine  intake  may  cause  engine  failure at least  cause  plane  lost  her  altitude.

So  probeller  blade  may  cover  jet  engine  intake .

 
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45-Shooter    No, props do not make a engine more reliable!   7/8/2013 4:34:08 PM
The blade itself is a huge liability!
What  I like  at C-130J is  that ; her  turbo prob  engine .
Me too!
Turbo  prop more  dependable  than  jet  engine  because  just  incase  any  technical  problam  jet  engine  propeller  engine  will help  plane  survive.
This is so wrong. Turbo props have an extra heavily loaded gear box subject to failure. Furthermore, Prop gearboxes are notoriously hard to design and are required to be much heavier than turbine engine accessory gear boxes because the prop blade itself is a large lever that imposes large transient and vibratory loads! So no, Turbo-props are not nearly as reliable as ordinary turbo-jets! See the problems in the Airbus A-400!
 
Thats  why  some  passenger plane  still use  turbo prop.
No! They use turbo-props because of economic reasons of fuel burn over short distances, short take off and landing distances!
 
Another  reason why turbo prop might  be  important  military  cargo plane ; most  manpads ,SAM  missiles  work with  proximty  fuse  and  continious  rod war  head whic contains 3000 pieces tungsten pellets  can  spread  200 meter  radius.
Wrong again. a "Continuous rod" war head contains only ONE FRAGMENT! When the explosive charge explodes, the fragment is deformed and expands into a huge ring like a Hula-Hoop! That ring has huge cutting power that cuts the target in to two or more parts!
 
Thats  tungsten  pellets  spread from  missile  head ,to engine  intake  may  cause  engine  failure at least  cause  plane  lost  her  altitude.
The prop itself forms a huge additional vulnerability that greatly increases the ability of anti-air systems to damage and destroy the plane! Loss of a blade or even a portion of one, will certainly cause the loss of the engine and if it sheds other blades, the plane! A single tungsten fragment can cause the blade to become out of balance and destroy the engine and the engine mounts. But the typical worse case is when the prop strikes the rocket motor case, either before or after warhead detonation. That impact will certainly destroy the engine and possibly the plane!
 
So  probeller  blade  may  cover  jet  engine  intake .



 
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marat,jean       7/8/2013 10:04:43 PM
Foolishness from shooter (as usual). VHKG is almost incomprehensible sometimes, but he does try to think and he makes some interesting observations. There is some (minor) defense against intake ingestion when a bird is whacked into bloody bits by a propeller before it is sucked into the turbine intake. Not sure that would work with flak, but VHKG did think about it, and it is a valid point.
 
 
 
 
 
 
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