KR>Vacuum Source

[Scott Cable]

Netters,
I'm looking for a cleaner way of mounting a 4 in
vacuum venturi.  It appears that Steve Jones' setup is
effective, as far as providing ample vacuum, but I
think there's gotta be a cleaner way to do this.
Has anyone placed the venturi inside the cowl and
provided an inlet and exhaust for it?
Inside the cowl would provide several advantages:
1.) Less drag
2.) Less prone to icing
3.) Ram air from prop would provide vacuum signal
sooner?

Could a vacuum pan set-up provide enough vacuum to run
vacuum powered instruments?  A Smog check valve is
placed perpendicular to the exhaust flow, with the
check valve opening facing downstream.  This provides
enough vacuum to evacuate the crankcase of fumes,
enough power to run instruments?

If both of these systems were plumbed, would it have
enough redundancy to use with out electrical
instrument back-up?
What are other KR's that flying (or close to it)using?

=
Scott Cable
KR-2S # 735
Wright City, MO
s2cab...@yahoo.com

__
Do you Yahoo!?
Free Pop-Up Blocker - Get it now
http://companion.yahoo.com/

KR>Vacuum Source

[Wood, Sidney M.]

Scott,
There are standby vacuum systems on production aircraft that use the vacuum 
generated in the engine intake manifold.  One disadvantage is the power 
reduction and leaned mixture when this standby system is selected for use.  
This system will operate a vertical gyro and a gyro compass with about 4 inches 
of vacuum under 5,000 feet MSL.
Sid Wood KR2, N6242
Mechanicsville, MD

-



Netters,
I'm looking for a cleaner way of mounting a 4 in
vacuum venturi.  It appears that Steve Jones' setup is
effective, as far as providing ample vacuum, but I
think there's gotta be a cleaner way to do this.
Has anyone placed the venturi inside the cowl and
provided an inlet and exhaust for it?
Inside the cowl would provide several advantages:
1.) Less drag
2.) Less prone to icing
3.) Ram air from prop would provide vacuum signal
sooner?

Could a vacuum pan set-up provide enough vacuum to run
vacuum powered instruments?  A Smog check valve is
placed perpendicular to the exhaust flow, with the
check valve opening facing downstream.  This provides
enough vacuum to evacuate the crankcase of fumes,
enough power to run instruments?

If both of these systems were plumbed, would it have
enough redundancy to use with out electrical
instrument back-up?
What are other KR's that flying (or close to it)using?

=
Scott Cable
KR-2S # 735
Wright City, MO
s2cab...@yahoo.com

__
Do you Yahoo!?
Free Pop-Up Blocker - Get it now
http://companion.yahoo.com/

___
see KRnet list details at http://www.krnet.org/instructions.html


-- next part --
A non-text attachment was scrubbed...
Name: not available
Type: application/ms-tnef
Size: 4574 bytes
Desc: not available
Url : 
http://mylist.net/private/krnet/attachments/20031202/9c17368a/attachment.bin

KR>Vacuum Source

[gleone]

 I found a site where one fellow built his venturi into the wing root.  It
makes for an extremely neat installation.  Now, if I can find the pictures,
I'll send them to you but it may be a while.  If this jogs anyone else's
memory, and you have those same picts, please feel free to contact Scott.

Gene, Worland, Wyoming

---Original Message---

From: KRnet
List-Post: krnet@list.krnet.org
Date: Tuesday, December 02, 2003 11:29:52 AM
To: kr...@mylist.net
Subject: KR>Vacuum Source

Netters,
I'm looking for a cleaner way of mounting a 4 in
vacuum venturi. It appears that Steve Jones' setup is
effective, as far as providing ample vacuum, but I
think there's gotta be a cleaner way to do this.
Has anyone placed the venturi inside the cowl and
provided an inlet and exhaust for it?
Inside the cowl would provide several advantages:
1.) Less drag
2.) Less prone to icing
3.) Ram air from prop would provide vacuum signal
sooner?

Could a vacuum pan set-up provide enough vacuum to run
vacuum powered instruments? A Smog check valve is
placed perpendicular to the exhaust flow, with the
check valve opening facing downstream. This provides
enough vacuum to evacuate the crankcase of fumes,
enough power to run instruments?

If both of these systems were plumbed, would it have
enough redundancy to use with out electrical
instrument back-up?
What are other KR's that flying (or close to it)using?

=
Scott Cable
KR-2S # 735
Wright City, MO
s2cab...@yahoo.com

__
Do you Yahoo!?
Free Pop-Up Blocker - Get it now
http://companion.yahoo.com/

___
see KRnet list details at http://www.krnet.org/instructions.html

. 

KR>Vacuum Source

[larry flesner]

>Netters,
>I'm looking for a cleaner way of mounting a 4 in
>vacuum venturi. 
>Scott Cable
+++=

I'm looking for a vacuum source also.  I removed the vacuum
pump and complete system from my 0-200 to cut down some
weight.  I have an elect T and was hoping for an elect AH
but the price is out of sight.  I'm looking to settle for a vacuum
AH (I had one and sold it) if I can get a vacuum source other
then a large round venturi hanging on the fuselage.

I had considered mounting one in the cowling but I have no
room.  I've been wondering about building a rectangluar
venturi and mounting it on the belly.  Something like maybe
one inch thick and 5 or 6 inches wide with venturi shape
inside.  It seems like that would be a lot more aerodynamic
if it would work.  Do we have any engineers on the net that
could give me some dimensions and a hand drawing or
something on what point to pick up the vacuum?  I had also
considered building something that looks like 1/2 a round
venturi and mounting it directly on the fuselage.  I suspect
to work properly the venturi may have to be spaced out
from it's mount in "clean" air.  I haven't the slightest idea 
at this point.  Help or suggestions anyone?

Larry Flesner
Carterville, Illinois

KR>Vacuum Source

[fixerjo...@aol.com]

hey scott,,the prop blast does provide almost ample vac volumn for the DG,but 
a far cry from supplying enough vac for the artifical horizon.  the venturi 
supplies too much vac (9 inches) at speed. you must use a vac regulator to get 
4.5-5.5 inches. too much vac will burn out gyro berings quickly!   if anyone 
figures out how to elimniate that ugly,draging thing,,let me know. untill 
then,it gets the job done.

KR>Vacuum Source

[jsmon...@aol.com]

If you find the pictures of the venturi in the wing root... please e-mail 
them to me also!!!

Thanks
John S. Monday
KR2S
Laguna Beach, CA

KR>Vacuum Source

[gleone]

Hah!  I knew I wasn't going completely senile!  (I've seen d' Nile several
times!)  I found the link!  The pictures aren't the best but the article
goes through it step by step.  

 http://kr.abshier.org/newsletters/nl50.html

Enjoy!

Gene Leone, Worland, Wyoming

---Original Message---

From: KRnet
List-Post: krnet@list.krnet.org
Date: Tuesday, December 02, 2003 10:03:56 PM
To: kr...@mylist.net
Subject: Re: KR>Vacuum Source

If you find the pictures of the venturi in the wing root... please e-mail
them to me also!!!

Thanks
John S. Monday
KR2S
Laguna Beach, CA
___
see KRnet list details at http://www.krnet.org/instructions.html

. 

KR>Vacuum Source-Wing Root

[Scott Cable]

Thanks Gene!
Crowds the cockpit though right?
--- gleone  wrote:

>  http://kr.abshier.org/newsletters/nl50.html


=
Scott Cable
KR-2S # 735
Wright City, MO
s2cab...@yahoo.com

__
Do you Yahoo!?
Free Pop-Up Blocker - Get it now
http://companion.yahoo.com/

KR>Vacuum Source

[Mike Turner]

I would to see those pictures of venturi in the wing root also.

Mike Turner
KR2WS
Jackson, Mo
  - Original Message - 
  From: jsmon...@aol.com 
  To: kr...@mylist.net 
  Sent: Tuesday, December 02, 2003 11:03 PM
  Subject: Re: KR>Vacuum Source


  If you find the pictures of the venturi in the wing root... please e-mail 
  them to me also!!!

  Thanks
  John S. Monday
  KR2S
  Laguna Beach, CA
  ___
  see KRnet list details at http://www.krnet.org/instructions.html

KR>Vacuum Source

[gleone]

 Here is the link for the venturi built into the wing root.  The nice thing
about it is it's "free weight" if not "negative weight".  Enjoy,

Gene Leone, Worland, Wyoming

http://kr.abshier.org/newsletters/nl50.html

---Original Message---

From: KRnet
List-Post: krnet@list.krnet.org
Date: Wednesday, December 03, 2003 7:43:23 PM
To: KRnet
Subject: Re: KR>Vacuum Source

I would to see those pictures of venturi in the wing root also.

Mike Turner
KR2WS
Jackson, Mo
- Original Message -
From: jsmon...@aol.com
To: kr...@mylist.net
Sent: Tuesday, December 02, 2003 11:03 PM
Subject: Re: KR>Vacuum Source


If you find the pictures of the venturi in the wing root... please e-mail
them to me also!!!

Thanks
John S. Monday
KR2S
Laguna Beach, CA
___
see KRnet list details at http://www.krnet.org/instructions.html
___
see KRnet list details at http://www.krnet.org/instructions.html

. 

KR>Vacuum Source

[Iglesias]

There is a vacum system (pump) in all diesel motors. Can´t use it?

- Original Message -
From: "Colin" <crain...@cfl.rr.com>
To: <kr...@mylist.net>
Sent: Monday, April 28, 2003 12:46 PM
Subject: KR>Vacuum Source


Not to be presumptious, but it has been my experience that the exhaust
pilses from an engine especially at the lower rpms, will not be sufficient
in volume or steady enough to support more than one instrument with regular
vacuum. The best solution short of a vacuum pump, would be to either install
an emissions air pump with a belt drive and reverse the connections to
create suction, or use a vacuum venturi and mount it inside the cowling just
behind one head so that heated air flows through it, as well as getting a
prime of vauum from the prop wash through the engine compartment/cowling.
This should provide adequate vacuum for initial spin-up of the instruments,
and also guard against icing if inadvertant IMC is encountered. All tend to
agree that the whole configuration and purpose of the KR2, or KR1 is VFR
only, but the insurance would be nice. When I flew the Cessna 172RG, and the
Beech Duchess's they have their carb intake air drawn from behind the left
hand head, and then ducted down to a side draft carb below the oil pan. This
layout allowed us to basically never have to use carb heat in any flight
condition due to the already pre-warmed air, even after simulated emergency
descents, etc... The should be adequate heat to prevent the venturi from
icing. If I add a vacuum system on mine, this is where I intend to add the
venturi. It will also keep it from adding drag to the exterior.

Colin Rainey
crain...@cfl.rr.com
Sanford, Florida
FLY SAFE___
see KRnet list details at http://www.krnet.org/instructions.html
---
[This E-mail scanned for viruses by Declude Virus]



---
[This E-mail scanned for viruses by Declude Virus]

KR>Vacuum Source

[Colin]

Not to be presumptious, but it has been my experience that the exhaust pilses 
from an engine especially at the lower rpms, will not be sufficient in volume 
or steady enough to support more than one instrument with regular vacuum. The 
best solution short of a vacuum pump, would be to either install an emissions 
air pump with a belt drive and reverse the connections to create suction, or 
use a vacuum venturi and mount it inside the cowling just behind one head so 
that heated air flows through it, as well as getting a prime of vauum from the 
prop wash through the engine compartment/cowling. This should provide adequate 
vacuum for initial spin-up of the instruments, and also guard against icing if 
inadvertant IMC is encountered. All tend to agree that the whole configuration 
and purpose of the KR2, or KR1 is VFR only, but the insurance would be nice. 
When I flew the Cessna 172RG, and the Beech Duchess's they have their carb 
intake air drawn from behind the left hand head, and then ducted down to a side 
draft carb below the oil pan. This layout allowed us to basically never have to 
use carb heat in any flight condition due to the already pre-warmed air, even 
after simulated emergency descents, etc... The should be adequate heat to 
prevent the venturi from icing. If I add a vacuum system on mine, this is where 
I intend to add the venturi. It will also keep it from adding drag to the 
exterior.

Colin Rainey
crain...@cfl.rr.com
Sanford, Florida
FLY SAFE

KR>Vacuum Source

[Scott Cable]

Colin wrote:
"Not to be presumptious, but it has been my experience that the exhaust pulses 
from an engine especially at the lower rpms, will not be sufficient in volume 
or steady enough to support more than one instrument with regular vacuum."

One could always incorporate a vacuum reservoir.

or: Here's a nice vacuum pump advertised in Jeg's


http://www.jegs.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=2461=361

Note the name of the maker: Aerospace Components..


Scott Cable
KR-2S # 735
Linden, MI
s2cab...@yahoo.com

-
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo.

KR>vacuum source

[Oscar Zuniga]

Somebody mentioned the idea of burying the venturi in the wing root.  Here's 
a snip from Feb., 2000 KRNet archive on this subject:

>Garth Hess built a venturi out of fiberglass & put it in the wing root 
>fairings.  It was documented in an old KR News letter
>I am on the road again, yet, still so I can't scan & email it.
>Bill Higdon
>willard...@aol.com

Bill is still on this list, I believe.  Plus I saw the detail myself, in the 
old newsletter (hard copy).  It was only big enough to drive one or two 
instruments though.  I think if I were going to this much trouble, I'd 
spring for one of the whiz-bang EFIS deals instead.

Oscar Zuniga
San Antonio, TX
mailto: taildr...@hotmail.com
website at http://www.flysquirrel.net





From: krnet-requ...@mylist.net
To: kr...@mylist.net
Subject: KRnet Digest, Vol 19, Issue 1
List-Post: krnet@list.krnet.org
Date: Mon, 28 Apr 2003 12:00:02 -0700

Send KRnet mailing list submissions to
kr...@mylist.net

To subscribe or unsubscribe via the World Wide Web, visit
http://mylist.net/listinfo/krnet
or, via email, send a message with subject or body 'help' to
krnet-requ...@mylist.net

You can reach the person managing the list at
krnet-ow...@mylist.net

When replying, please edit your Subject line so it is more specific
than "Re: Contents of KRnet digest..."
Today's Topics:

1. EGT probe threads and boss? (Mark Langford)
2. kr sale? (Dean Selby)
3. Smooth Prime Cross Linker (larry flesner)
4. Re: Smooth Prime Cross Linker (Dan Heath)
5. Re: EGT probe threads and boss?
6. RE: Glass cockpit (Deems Herring)
7. kr sale/liability (larry flesner)
8. Re: kr sale? (Paul Gangemi)
9. Re: Re: KR>Glass cockpit-vacum source (Scott Cable)
   10. Re: kr sale/liability (Dana Overall)
   11. Re: Glass cockpit-vacum source (gleone)
   12. Vacuum Source (Colin)
   13. Re: EGT probe threads and boss? (Mark Langford)
   14. Re: Vacuum Source (Scott Cable)
<< message5.txt >>
<< message7.txt >>
<< message9.txt >>
<< message11.txt >>
<< message13.txt >>
<< message15.txt >>
<< message17.txt >>
<< message19.txt >>
<< message21.txt >>
<< message23.txt >>
<< message25.txt >>
<< message29.txt >>
<< message31.txt >>
<< message33.txt >>
___
See KRnet list details at http://www.krnet.org/instructions.html


_
Protect your PC - get McAfee.com VirusScan Online  
http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

Fw: KR>vacuum source

[Norm]

In the tape I received sometime back in the RR information pack, there is a
description of a KR-100 with an 0200 Cont and the venturi made in the cowl
cheek.  Builder was Kevin Kelly.
Norm Seel
Brandon, FL
norman.s...@verizon.net
- Original Message -
From: "Oscar Zuniga" <taildr...@hotmail.com>
To: <kr...@mylist.net>
Sent: Monday, April 28, 2003 12:23 PM
Subject: KR>vacuum source


> Somebody mentioned the idea of burying the venturi in the wing root.
Here's
> a snip from Feb., 2000 KRNet archive on this subject:
>
> >Garth Hess built a venturi out of fiberglass & put it in the wing root
> >fairings.  It was documented in an old KR News letter
> >I am on the road again, yet, still so I can't scan & email it.
> >Bill Higdon
> >willard...@aol.com
>
> Bill is still on this list, I believe.  Plus I saw the detail myself, in
the
> old newsletter (hard copy).  It was only big enough to drive one or two
> instruments though.  I think if I were going to this much trouble, I'd
> spring for one of the whiz-bang EFIS deals instead.
>
> Oscar Zuniga
> San Antonio, TX
> mailto: taildr...@hotmail.com
> website at http://www.flysquirrel.net
>
>
>
>
>
> From: krnet-requ...@mylist.net
> To: kr...@mylist.net
> Subject: KRnet Digest, Vol 19, Issue 1
> Date: Mon, 28 Apr 2003 12:00:02 -0700
>
> Send KRnet mailing list submissions to
> kr...@mylist.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mylist.net/listinfo/krnet
> or, via email, send a message with subject or body 'help' to
> krnet-requ...@mylist.net
>
> You can reach the person managing the list at
> krnet-ow...@mylist.net
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of KRnet digest..."
> Today's Topics:
>
> 1. EGT probe threads and boss? (Mark Langford)
> 2. kr sale? (Dean Selby)
> 3. Smooth Prime Cross Linker (larry flesner)
> 4. Re: Smooth Prime Cross Linker (Dan Heath)
> 5. Re: EGT probe threads and boss?
> 6. RE: Glass cockpit (Deems Herring)
> 7. kr sale/liability (larry flesner)
> 8. Re: kr sale? (Paul Gangemi)
> 9. Re: Re: KR>Glass cockpit-vacum source (Scott Cable)
>10. Re: kr sale/liability (Dana Overall)
>11. Re: Glass cockpit-vacum source (gleone)
>12. Vacuum Source (Colin)
>13. Re: EGT probe threads and boss? (Mark Langford)
>14. Re: Vacuum Source (Scott Cable)
> << message5.txt >>
> << message7.txt >>
> << message9.txt >>
> << message11.txt >>
> << message13.txt >>
> << message15.txt >>
> << message17.txt >>
> << message19.txt >>
> << message21.txt >>
> << message23.txt >>
> << message25.txt >>
> << message29.txt >>
> << message31.txt >>
> << message33.txt >>
> ___
> See KRnet list details at http://www.krnet.org/instructions.html
>
>
> _
> Protect your PC - get McAfee.com VirusScan Online
> http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
>
>
> ___
> see KRnet list details at http://www.krnet.org/instructions.html