Today's Message Index:
----------------------
1. 03:49 AM - FW: Fish Story (viperdoc)
2. 05:37 AM - Re: Cockpit bulbs (A. Dennis Savarese)
3. 05:43 AM - UOTE Re: MF'ing air system! Yak-50 (Scooter)
4. 05:49 AM - Re: UOTERe: Re: MF'ing air system! Yak-50 (Roger Kemp)
5. 07:00 AM - Re: Cockpit bulbs (Roger Kemp)
6. 08:05 AM - Re: hydro lock (Andy Hawes)
7. 10:49 AM - Re: Lone Star Red Star, May 2008 (Lynn Allen)
8. 12:29 PM - Re: UOTERe: Re: MF'ing air system! Yak-50 (Yak Pilot)
9. 12:30 PM - Re: Yak-50 fly-by.... (Yak Pilot)
10. 02:57 PM - Re: UOTERe: Re: MF'ing air system! Yak-50 (Roger Kemp)
11. 02:58 PM - Re: Lone Star Red Star, May 2008 (Roger Kemp)
12. 04:19 PM - Re: FW: Fish Story (FamilyGage@aol.com)
13. 06:59 PM - Re: Lone Star Red Star, May 2008 (Lynn Allen)
14. 07:15 PM - UOTE Re: MF'ing air system! Yak-50 (Craig Winkelmann, CFI)
Message 1
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Fish Story
A guy who lives at Lake Conroe (50 miles north of Houston) saw a ball
bouncing around kind of strange in the lake and went to investigate.
It turned out to be a flathead catfish who had obviously tried to swallow a
basket ball which became stuck in its mouth!!
The fish was totally exhausted from trying to dive, but unable to because
the ball would always bring him back up to the surface. The guy tried
numerous times to get the ball out, but was unsuccessful. He finally had his
wife cut the ball in order to deflate it and release the hungry catfish.
You probably wouldn't have believed this,
if you hadn't seen the following pictures...
Be kinder than necessary. 'Cause everyone you meet is fighting some kind of
battle.
Doc
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Message 2
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| Subject: | Re: Cockpit bulbs |
Doc,
When we get to the hangar, let me take a look at a bulb behind the dimming
lense.
Dennis
----- Original Message -----
From: "viperdoc" <viperdoc@mindspring.com>
Sent: Friday, September 14, 2007 9:23 PM
Subject: RE: Yak-List: Cockpit bulbs
>
> Dennis,
> That technique works on my 52 but not my 78 50. I think it will work on
> the
> later models. My bulbs can actually be dimmed or brightened by rotating
> the
> bulb housing (lens). That is not the case with the 52.
> Doc
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
> Savarese
> Sent: Friday, September 14, 2007 5:26 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Cockpit bulbs
>
> <dsavarese@elmore.rr.com>
>
> I use #327's and remove the internal material and glass bulb from the old
> Russian bulb and slide the 327 into the new Russian bulb "sleeve". Insert
> this into the lamp fixture. Works perfect and has for many years on many
> airplanes.
> Dennis
>
> ----- Original Message -----
> From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E"
> <mark.bitterlich@navy.mil>
> To: <yak-list@matronics.com>
> Sent: Friday, September 14, 2007 4:26 PM
> Subject: RE: Yak-List: Cockpit bulbs
>
>
>> MALS-14 64E" <mark.bitterlich@navy.mil>
>>
>> Are you talking about 327 bulbs Doc? Or something different? Give me
>> a bulb reference number will you dude?
>>
>> Mark
>>
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
>> Sent: Thursday, September 13, 2007 23:20
>> To: yak-list@matronics.com
>> Subject: RE: Yak-List: Cockpit bulbs
>>
>>
>> Gill Hayes at M14. 928-681-4400. A small piece of trivia for the 50
>> drivers.
>> Did you know that the 28 v instrument panel bulbs use in fire trucks can
>> be used to replace the burnt out gear actuator lights? I found mine at
>> Auto Zone.
>> Doc
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of John Graham
>> Sent: Thursday, September 13, 2007 8:51 PM
>> To: Yak list
>> Subject: Yak-List: Cockpit bulbs
>>
>>
>> May I ask for a reference as to where I might procure some extra cockpit
>> bulbs?
>>
>> Thanks,
>>
>> John P. Graham
>> CubFlyer1940@Yahoo.com
>> Cell phone (847) 641-1330
>>
>>
>> Check out the hottest 2008 models today at Yahoo! Autos.
>> http://autos.yahoo.com/new_cars.html
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 3
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| Subject: | Re: UOTE Re: MF'ing air system! Yak-50 |
Well, just have to toss this in. These threads remind me of this classic monty
python skit:
http://www.youtube.com/watch?v=y05EmK66Gsk
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134526#134526
Message 4
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| Subject: | Re: MF'ing air system! Yak-50 |
Shack! And the pressure decreases in the restriction as the flow increases
with resultant turbulence/eddying/whatever to flow as it exits the
restricted area that results in loss of energy. That really is not lost when
considering that it is converted from kinetic to potential energy.
Bottom line is a restriction is a constriction that means Tim's gotta go on
the jacks again an listen for his affliction!
Good luck, Tim.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Brian Lloyd
Sent: Saturday, September 15, 2007 12:01 AM
Subject: Re: UOTERE: Yak-List: Re: MF'ing air system! Yak-50
On Sep 14, 2007, at 7:19 PM, viperdoc wrote:
>
> Mark,
> You are absolutely correct in your reference to Boyle's law,
> Charles Law,
> and Avagadro's law as they reference fluids at rest. In this case
> you are
> looking at a fluid in motion. The term "fluid" applies to both a
> liquid and
> a gas. A tube (line) having a constriction section between a larger
> diameter
> inlet and the outlet section ...
lots of stuff removed
> Now having said all that, Bernoulli's theorem has many
> applications. The
> carb is an atomizer, the filter pump is an aspirator, and our wing,
> the air
> foil. Last but not least ...
is a lot of stuff that really doesn't have any application.
Doc, sometimes a restriction is just a restriction.
(With apologies to Dr. Sigmund Freud.)
--
Brian Lloyd 3191 Western Drive
brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
Antoine de Saint-Exupry
PGP key ID: 12095C52A32A1B6C
PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C
Message 5
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Copy.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: Saturday, September 15, 2007 7:37 AM
Subject: Re: Yak-List: Cockpit bulbs
<dsavarese@elmore.rr.com>
Doc,
When we get to the hangar, let me take a look at a bulb behind the dimming
lense.
Dennis
----- Original Message -----
From: "viperdoc" <viperdoc@mindspring.com>
Sent: Friday, September 14, 2007 9:23 PM
Subject: RE: Yak-List: Cockpit bulbs
>
> Dennis,
> That technique works on my 52 but not my 78 50. I think it will work on
> the
> later models. My bulbs can actually be dimmed or brightened by rotating
> the
> bulb housing (lens). That is not the case with the 52.
> Doc
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
> Savarese
> Sent: Friday, September 14, 2007 5:26 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Cockpit bulbs
>
> <dsavarese@elmore.rr.com>
>
> I use #327's and remove the internal material and glass bulb from the old
> Russian bulb and slide the 327 into the new Russian bulb "sleeve". Insert
> this into the lamp fixture. Works perfect and has for many years on many
> airplanes.
> Dennis
>
> ----- Original Message -----
> From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E"
> <mark.bitterlich@navy.mil>
> To: <yak-list@matronics.com>
> Sent: Friday, September 14, 2007 4:26 PM
> Subject: RE: Yak-List: Cockpit bulbs
>
>
>> MALS-14 64E" <mark.bitterlich@navy.mil>
>>
>> Are you talking about 327 bulbs Doc? Or something different? Give me
>> a bulb reference number will you dude?
>>
>> Mark
>>
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
>> Sent: Thursday, September 13, 2007 23:20
>> To: yak-list@matronics.com
>> Subject: RE: Yak-List: Cockpit bulbs
>>
>>
>> Gill Hayes at M14. 928-681-4400. A small piece of trivia for the 50
>> drivers.
>> Did you know that the 28 v instrument panel bulbs use in fire trucks can
>> be used to replace the burnt out gear actuator lights? I found mine at
>> Auto Zone.
>> Doc
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of John Graham
>> Sent: Thursday, September 13, 2007 8:51 PM
>> To: Yak list
>> Subject: Yak-List: Cockpit bulbs
>>
>>
>> May I ask for a reference as to where I might procure some extra cockpit
>> bulbs?
>>
>> Thanks,
>>
>> John P. Graham
>> CubFlyer1940@Yahoo.com
>> Cell phone (847) 641-1330
>>
>>
>> Check out the hottest 2008 models today at Yahoo! Autos.
>> http://autos.yahoo.com/new_cars.html
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 6
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Thanks very much for all the very detailed replies. I believe the current
prototype for the Radial Rocket is using both an electric sump pump for post
flight clean up, the oil shut-off valve as well as the valve/drain with
success. As I get closer to setting up fuel, air and oil systems I'm sure
I'll have even more questions.
Thanks again for everyone's extensive input and time here --
Andy Hawes
www.radialrocketman.com
Nashville, TN
andy717@comcast.net
On 9/14/07 12:03 PM, "Brian Lloyd" <brian-1927@lloyd.com> wrote:
>
>
> On Sep 14, 2007, at 8:21 AM, Andy Hawes wrote:
>
>> Hey guys,
>>
>> Future M14P pilot here -- wouldnt using a quick drain valve
>> collecting from cylinders 4, 5 and 6 be an alternative to pulling
>> the plugs? Im not sure if the Yak folks have/use these drains or
>> not and Im just trying to verify if pulling the plugs AND using a
>> drain valve are necessary -
>
> The quick drains drain the intake riser tubes, not the cylinder. If
> the intake valve is closed and oil goes past the rings into the
> cylinder itself it would never make it to the quick drain. (As the
> engine cools, air trapped in the cylinder decreases in volume and
> forms a vacuum which can suck-in any oil sitting on top of the piston.)
>
> So, the quick drains do not necessarily end up with all the oil at
> the low point.
>
> Some people like to turn the engine backwards when encountering
> resistance/lock which then pushes oil from the cylinder to the intake
> tube. There are two problems with this that may cause the engine to
> hydraulic lock again upon starting:
>
> 1. The intake valve is not necessarily the lowest point in the
> cylinder. Significant quantity of oil can still sit in the head. Best
> case this raises compression. Worst case is that there might be
> enough to cause a lock.
>
> 2. Oil that is pushed into the intake tube might not go out the quick
> drain and instead remain in the intake tube. This oil can be sucked
> back into the cylinder and cause a lock after the engine fires. If
> there is enough this is just about guaranteed to bend/break a piston
> or con-rod.
>
> The ONLY 100% safe way to undo a hydraulic lock is to open in the
> intake drains, pull the bottom plugs, and pull the engine through
> until you can get no more oil from the plug holes or the intake drain
> plug holes.
>
> Given how much a broken engine can cost, it just isn't worth the time
> saved by doing a half-assed job of clearing the bottom cylinders.
> Also remember, a partial lock can bend a rod but leave no other
> symptoms. Your engine then becomes a time-bomb.
>
>
> --
> Brian Lloyd 3191 Western Drive
> brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
> +1.916.367.2131 (voice) +1.270.912.0788 (fax)
>
> I fly because it releases my mind from the tyranny of petty things . . .
> Antoine de Saint-Exupry
>
> PGP key ID: 12095C52A32A1B6C
> PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C
>
>
>
>
>
>
>
>
Message 7
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| Subject: | Re: Lone Star Red Star, May 2008 |
Great ideal, I live about 20min south of there. Let me if I can help. I should
be up and running by then.
Lynn
Jon Boede <jonboede@hotmail.com> wrote:
I have started pre-planning for a large fly-in and formation clinic at
Lancaster, TX (KLNC) in May of 2008.
The Cold War Air Museum at Lancaster has agreed to host the event and the
airport manager, a former Navy Air Boss, has said that he'll be giving
"whatever it takes" support to us.
Jon
Message 8
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| Subject: | Re: MF'ing air system! Yak-50 |
Doc...... I disagree. :-)
Mark
viperdoc <viperdoc@mindspring.com> wrote:
Mark,
You are absolutely correct in your reference to Boyle's law, Charles Law,
and Avagadro's law as they reference fluids at rest. In this case you are
looking at a fluid in motion. The term "fluid" applies to both a liquid and
a gas. A tube (line) having a constriction section between a larger diameter
inlet and the outlet section is called a "venture tube". In this case, a
smaller diameter tube in between two larger diameter tubes (lines). Whereas
point a is the entry point and point b is the exit point of the fluid as it
flows from the larger diameter tube to the end of the smaller diameter tube
you have introduced a constriction. So basically, you have flow thru a
constriction. In other words when you have a fluid flowing through a pipe of
varying cross-sectional area there can be no accumulation between a and b,
provided that fluid is incompressible. Hence the mass of the fluid passing
through the cross section A1 with speed v1 must equal the mass passing in
the same time (t) through cross section A2 with speed v2, where rho (p) is
the density of the fluid (since my computer does not do the Greek alphabet,
rho is p in this case).
A1v1pt = A2v2pt
So since A1v1 = A2v2, it follows that the speed of flow in a pipe is greater
in those regions where there is a constriction in the cross-section area
(A). [The smaller diameter tube (line)]. Furthermore, the speed is greater
at point b than at a, the fluid experiences an acceleration between a and b.
This requires an accelerating force. This accelerating force can be present
only if the pressure at point a is greater than the pressure a point b. So
in a steady flow of a fluid, the pressure is least where the speed is
greatest. So when a gas or a liquid enters the narrow part of the tube (the
constriction), it speeds up in the narrow part of the tube (line) and there
is a corresponding drop in pressure.
Bernoulli's theorem looks at the relationship between the pressure at any
point in a fluid and velocity of the fluid at that point. The movement of
the particles of fluid in a linear line through the tube is defined as a
streamline. Bernoulli's theorem states that at any two points along a
streamline the sum of the pressure, the kinetic energy per unit volume, and
the potential energy per unit volume has the same value.
Now the mathematical expression of that is as follows:
P1 +1/2pv1 squared + pgh1 = P2 = 1/2 pv2 squared +pgh2.
P = pressure
P = rho (density)
V = volumne
g = gravity
h = head [in a pressure- depth relation the depth (h) is frequently called
the "head"]. In a Pressure head, the h is equal to P/pg {p = rho (density of
the fluid) and g = gravity}
So applying Bernoulli's theorem to the case of a horizontal pipe that has a
constriction you can determine the rate of flow of the fluid passing through
if you know the pressure of the fluid and the area of the pipe at the widest
part or at the narrowest part by simply rearranging the equation for the
unknown.
So if you want to know P2 (the exit pressure for the narrow segment)
rearrange the equation to read as:
P2 = P1 + pg(h1-h2) +p/2(v1 squared - v2 squared).
Now having said all that, Bernoulli's theorem has many applications. The
carb is an atomizer, the filter pump is an aspirator, and our wing, the air
foil. Last but not least is the 2 year old child lying on the stretcher in
ER unable to breath due to bacterial epiglotitis obstructing the larynx
caused by Strep. In this case, the orifice (larynx) is narrowed by a
edematous epiglottis impeding flow of air. By manipulating the viscosity of
the gas by adding helium to the O2, we can support that child (maintain the
%Sat = 02 saturation) long enough to get them to the OR to intubate them. I
did not discuss viscosity as it affects the flow of a fluid through a
constriction did I?
For a further explaination, I refer you to College Physics by , Weber,
White, Manning and Waygand, Chapter 13, "Fluids in Motion", pp.241-255. Well
you do not have to go to my specific textbook, anyone that discusses fluid
mechanics can clarify this.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Friday, September 14, 2007 4:45 PM
Subject: UOTERE: Yak-List: Re: MF'ing air system! Yak-50
MALS-14 64E"
Uh Doc... I think highly of you my friend, but with all due respect, I
think the gas from the beans you ate last night might be influencing
your line of thinking here. Bernoulli's Principle does not apply in this
case. There is no "Venturi" no matter how hard you try to make it look
that way, and even if there was, the rules that impact the question do
not come from Mr. Bernoulli. Instead you might want to remember Mr.
Boyle. To wit:
Quote:
The mathematical equation for Boyle's law is:
where:
p denotes the pressure of the system.
V is the volume of the gas.
k is a constant value representative of the pressure and volume of the
system.
So long as temperature remains constant at the same value the same
amount of energy given to the system persists throughout its operation
and therefore, theoretically, the value of k will remain constant.
However, due to the derivation of pressure as perpendicular applied
force and the probabilistic likelihood of collisions with other
particles through collision theory, the application of force to a
surface may not be infinitely constant for such values of k, but will
have a limit when differentiating such values over a given time.
Forcing the volume V of the fixed quantity of gas to increase, keeping
the gas at the initially measured temperature, the pressure p must
decrease proportionally. Conversely, reducing the volume of the gas
increases the pressure.
Boyle's law is commonly used to predict the result of introducing a
change, in volume and pressure only, to the initial state of a fixed
quantity of gas. The "before" and "after" volumes and pressures of the
fixed amount of gas, where the "before" and "after" temperatures are the
same (heating or cooling will be required to meet this condition), are
related by the equation:
p1V1 = p2V2
Boyle's law, Charles's Law, and Gay-Lussac's Law form the combined gas
law. The three gas laws in combination with Avogadro's law can be
generalized by the ideal gas law.
END QUOTE
So yes Tim... ANY line that you put between the tank and the original
line that is smaller than the original could CLEARLY cause this to
happen. In addition you have added LENGTH (I think?) If you have, then
your line from your new tank to where you hook it to the old line (did
you run it the whole way?) to be safe should have been even LARGER than
what was original.
Sorry to disagree with you Doc, but ... You must have been breathing
some of the NOS.....
Mark Bitterlich
N50YK
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
Sent: Thursday, September 13, 2007 22:44
Subject: RE: Yak-List: Re: MF'ing air system! Yak-50
Answer...quit possible. This being based on Bernolli's principle. A
small line introduces a venture effect. There will be a drop in pressure
at the point that the smaller line is connected to the larger line.
There is an increase in pressure at the point of constriction with
resistance to flow.
At the point of dilation past the point of constriction there is a drop
in pressure with a decrease in flow. The pressure will be lower in the
system past the point of restriction. The density of air is also a
factor too, but for this agreement you can assume that number is
constant.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Tim Gagnon
Sent: Thursday, September 13, 2007 7:03 PM
Subject: Yak-List: Re: MF'ing air system! Yak-50
Let me ask this..would a smaller diameter line than original cause
enough a restriction to explain the problems I am having.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134285#134285
Message 9
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| Subject: | Re: Yak-50 fly-by.... |
I think I know who it is too.
However, walls have ears.
Mark
Tim Gagnon <NiftyYak50@fuse.net> wrote:
This airplane looks very familiar......I think I know whose it is.
http://www.youtube.com/watch?v=Q7bl9AeS00Q
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134310#134310
Message 10
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| Subject: | Re: MF'ing air system! Yak-50 |
No sweety Da.
The # of the banoyete light bulb in my gear indicator is T1864!
Chec yo tips for grass stains :>)) I think there is only one YAK I would
like to have more that the mighty 50.the 9! Check the 9 out on Airshow.com.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Yak Pilot
Sent: Saturday, September 15, 2007 2:28 PM
Subject: RE: UOTERE: Yak-List: Re: MF'ing air system! Yak-50
Doc...... I disagree. :-)
Mark
viperdoc <viperdoc@mindspring.com> wrote:
Mark,
You are absolutely correct in your reference to Boyle's law, Charles Law,
and Avagadro's law as they reference fluids at rest. In this case you are
looking at a fluid in motion. The term "fluid" applies to both a liquid and
a gas. A tube (line) having a constriction section between a larger diameter
inlet and the outlet section is called a "venture tube". In this case, a
smaller diameter tube in between two larger diameter tubes (lines). Whereas
point a is the entry point and point b is the exit point of the fluid as it
flows from the larger diameter tube to the end of the smaller diameter tube
you have introduced a constriction. So basically, you have flow thru a
constriction. In other words when you have a fluid flowing through a pipe of
varying cross-sectional area there can be no accumulation between a and b,
provided that fluid is incompressible. Hence the mass of the fluid passing
through the cross section A1 with speed v1 must equal the mass passing in
the same time (t) through cross section A2 with speed v2, where rho (p) is
the density of the fluid (since my computer does not do the Greek alphabet,
rho is p in this case).
A1v1pt = A2v2pt
So since A1v1 = A2v2, it follows that the speed of flow in a pipe is greater
in those regions where there is a constriction in the cross-section area
(A). [The smaller diameter tube (line)]. Furthermore, the speed is greater
at point b than at a, the fluid experiences an acceleration between a and b.
This requires an accelerating force. This accelerating force can be present
only if the pressure at point a is greater than the pressure a point b. So
in a steady flow of a fluid, the pressure is least where the speed is
greatest. So when a gas or a liquid enters the narrow part of the tube (the
constriction), it speeds up in the narrow part of the tube (line) and there
is a corresponding drop in pressure.
Bernoulli's theorem looks at the relationship between the pressure at any
point in a fluid and velocity of the fluid at that point. The movement of
the particles of fluid in a linear line through the tube is defined as a
streamline. Bernoulli's theorem states that at any two points along a
streamline the sum of the pressure, the kinetic energy per unit volume, and
the potential energy per unit volume has the same value.
Now the mathematical expression of that is as follows:
P1 +1/2pv1 squared + pgh1 = P2 = 1/2 pv2 squared +pgh2.
P = pressure
P = rho (density)
V = volumne
g = gravity
h = head [in a pressure- depth relation the depth (h) is frequently called
the "head"]. In a Pressure head, the h is equal to P/pg {p = rho (density of
the fluid) and g = gravity}
So applying Bernoulli's theorem to the case of a horizontal pipe that has a
constriction you can determine the rate of flow of the fluid passing through
if you know the pressure of the fluid and the area of the pipe at the widest
part or at the narrowest part by simply rearranging the equation for the
unknown.
So if you want to know P2 (the exit pressure for the narrow segment)
rearrange the equation to read as:
P2 = P1 + pg(h1-h2) +p/2(v1 squared - v2 squared).
Now having said all that, Bernoulli's theorem has many applications. The
carb is an atomizer, the filter pump is an aspirator, and our wing, the air
foil. Last but not least is the 2 year old child lying on the stretcher in
ER unable to breath due to bacterial epiglotitis obstructing the larynx
caused by Strep. In this case, the orifice (larynx) is narrowed by a
edematous epiglottis impeding flow of air. By manipulating the viscosity of
the gas by adding helium to the O2, we can support that child (maintain the
%Sat = 02 saturation) long enough to get them to the OR to intubate them. I
did not discuss viscosity as it affects the flow of a fluid through a
constriction did I?
For a further explaination, I refer you to College Physics by , Weber,
White, Manning and Waygand, Chapter 13, "Fluids in Motion", pp.241-255. Well
you do not have to go to my specific textbook, anyone that discusses fluid
mechanics can clarify this.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Friday, September 14, 2007 4:45 PM
Subject: UOTERE: Yak-List: Re: MF'ing air system! Yak-50
MALS-14 64E"
Uh Doc... I think highly of you my friend, but with all due respect, I
think the gas from the beans you ate last night might be influencing
your line of thinking here. Bernoulli's Principle does not apply in this
case. There is no "Venturi" no matter how hard you try to make it look
that way, and even if there was, the rules that impact the question do
not come from Mr. Bernoulli. Instead you might want to remember Mr.
Boyle. To wit:
Quote:
The mathematical equation for Boyle's law is:
where:
p denotes the pressure of the system.
V is the volume of the gas.
k is a constant value representative of the pressure and volume of the
system.
So long as temperature remains constant at the same value the same
amount of energy given to the system persists throughout its operation
and therefore, theoretically, the value of k will remain constant.
However, due to the derivation of pressure as perpendicular applied
force and the probabilistic likelihood of collisions with other
particles through collision theory, the application of force to a
surface may not be infinitely constant for such values of k, but will
have a limit when differentiating such values over a given time.
Forcing the volume V of the fixed quantity of gas to increase, keeping
the gas at the initially measured temperature, the pressure p must
decrease proportionally. Conversely, reducing the volume of the gas
increases the pressure.
Boyle's law is commonly used to predict the result of introducing a
change, in volume and pressure only, to the initial state of a fixed
quantity of gas. The "before" and "after" volumes and pressures of the
fixed amount of gas, where the "before" and "after" temperatures are the
same (heating or cooling will be required to meet this condition), are
related by the equation:
p1V1 = p2V2
Boyle's law, Charles's Law, and Gay-Lussac's Law form the combined gas
law. The three gas laws in combination with Avogadro's law can be
generalized by the ideal gas law.
END QUOTE
So yes Tim... ANY line that you put between the tank and the original
line that is smaller than the original could CLEARLY cause this to
happen. In addition you have added LENGTH (I think?) If you have, then
your line from your new tank to where you hook it to the old line (did
you run it the whole way?) to be safe should have been even LARGER than
what was original.
Sorry to disagree with you Doc, but ... You must have been breathing
some of the NOS.....
Mark Bitterlich
N50YK
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
Sent: Thursday, September 13, 2007 22:44
Subject: RE: Yak-List: Re: MF'ing air system! Yak-50
Answer...quit possible. This being based on Bernolli's principle. A
small line introduces a venture effect. There will be a drop in pressure
at the point that the smaller line is connected to the larger line.
There is an increase in pressure at the point of constriction with
resistance to flow.
At the point of dilation past the point of constriction there is a drop
in pressure with a decrease in flow. The pressure will be lower in the
system past the point of restriction. The density of air is also a
factor too, but for this agreement you can assume that number is
constant.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of
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| Subject: | Lone Star Red Star, May 2008 |
Did I miss something?
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Lynn Allen
Sent: Saturday, September 15, 2007 12:49 PM
Subject: Re: Yak-List: Lone Star Red Star, May 2008
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| Subject: | Re: FW: Fish Story |
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| Subject: | Lone Star Red Star, May 2008 |
I'm not sure, but I'll try again. I live just south of Lancaster and look forward
to this event. I should up and running by then and can help if needed. This
location would be perfect for this type of event as due south you have all kinds
of area for training.
Lynn Allen
Roger Kemp <viperdoc@mindspring.com> wrote:
Did I miss something?
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Lynn Allen
Sent: Saturday, September 15, 2007 12:49 PM
Subject: Re: Yak-List: Lone Star Red Star, May 2008
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
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| Subject: | Re: UOTE Re: MF'ing air system! Yak-50 |
Doc:
Gotta give it to ya...pullin' out those old textbooks. I've packed mine away.
However, from my engineering days, you are right on with Mr. Bernoulli. Air
is a "fluid" that is in motion, hence his law applies.
By the way, some folks don't think Bernoulli's Law applies to aircraft wings as the reason for them generating lift. Check out http://www.allstar.fiu.edu/aero/airflylvl3.htm for a different view of lift!!
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134602#134602
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