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Thread: Carb heat

  1. #1

    Carb heat

    It seems lately that I get NEGLIGIBLE rpm drop when I pull carb heat after the run up.

    I used to see about 100 rpm drop.

    Is that likely because it been so HOT lately?

    Or does my recent incident of having a mud dobber and a frog in my carb throat mean I should go back in and check to see that the butterfly is closing fully when the carb heat is OFF.

    Specs.

    1963 Musketeer, M-238, Lycoming O-320-D2B,

    The carb is a Marvel-Schebler Model MA-4-SPA, P/N 10-3678-32.

    I think I know the answer, (unfortunately) just wondering how much the high temps could affect the rpm drop with carb heat.

    Cloyd
    President, BAC

  2. #2

    Carb heat

    Cloyd, does you plane seem anemic on take off? Mine
    has had small RPM drop and poor climb performance
    since it came out of annual. I'm thinking that my
    carb heat cable may have slipped a little (allowing a
    little hot air in all the time and rob me of power).
    I don't have any proof yet, but all the takeoffs I
    made while going down to fort worth seemed to be a
    little lacking in the power area. (at 150 HP, I
    didn't have much to spare anyhow).

    Jay

    --- cloydvanhook@imtt.com wrote:

    > It seems lately that I get NEGLIGIBLE rpm drop when
    > I pull carb heat after
    > the run up.
    >
    > I used to see about 100 rpm drop.
    >
    > Is that likely because it been so HOT lately?
    >
    > Or does my recent incident of having a mud dobber
    > and a frog in my carb
    > throat mean I should go back in and check to see
    > that the butterfly is
    > closing fully when the carb heat is OFF.
    >
    > Specs.
    >
    > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    >
    > The carb is a Marvel-Schebler Model MA-4-SPA, P/N
    > 10-3678-32.
    >
    > I think I know the answer, (unfortunately) just
    > wondering how much the
    > high temps could affect the rpm drop with carb heat.
    >
    > Cloyd
    > President, BAC
    > > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >


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  3. #3

    Carb heat

    You guys better get that straightened out before we go back to Gaston's.
    That hill comes up pretty fast and the trees may have grown some flying down
    the river valley!


    -----Original Message-----
    From: bac-mail-bounces@beechaeroclub.org
    [mailto:bac-mail-bounces@beechaeroclub.org]On Behalf Of James Bruce
    Sent: Tuesday, July 19, 2005 11:39 AM
    To: cloydvanhook@imtt.com; bac-mail@beechaeroclub.org
    Subject: Re: [BAC-Mail] Carb heat


    Cloyd, does you plane seem anemic on take off? Mine
    has had small RPM drop and poor climb performance
    since it came out of annual. I'm thinking that my
    carb heat cable may have slipped a little (allowing a
    little hot air in all the time and rob me of power).
    I don't have any proof yet, but all the takeoffs I
    made while going down to fort worth seemed to be a
    little lacking in the power area. (at 150 HP, I
    didn't have much to spare anyhow).

    Jay

    --- cloydvanhook@imtt.com wrote:

    > It seems lately that I get NEGLIGIBLE rpm drop when
    > I pull carb heat after
    > the run up.
    >
    > I used to see about 100 rpm drop.
    >
    > Is that likely because it been so HOT lately?
    >
    > Or does my recent incident of having a mud dobber
    > and a frog in my carb
    > throat mean I should go back in and check to see
    > that the butterfly is
    > closing fully when the carb heat is OFF.
    >
    > Specs.
    >
    > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    >
    > The carb is a Marvel-Schebler Model MA-4-SPA, P/N
    > 10-3678-32.
    >
    > I think I know the answer, (unfortunately) just
    > wondering how much the
    > high temps could affect the rpm drop with carb heat.
    >
    > Cloyd
    > President, BAC
    > > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >


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  4. #4

    Carb heat

    Also make sure the carb heat and cabin heat are not reversed, like mine
    were last year.


    David Snodgrass
    BAC East Central Regional Director
    Beech Be23 N6083N
    North Manchester, IN

    -----Original Message-----
    From: bac-mail-bounces@beechaeroclub.org
    [mailto:bac-mail-bounces@beechaeroclub.org] On Behalf Of James Bruce
    Sent: Tuesday, July 19, 2005 10:39 AM
    To: cloydvanhook@imtt.com; bac-mail@beechaeroclub.org
    Subject: Re: [BAC-Mail] Carb heat

    Cloyd, does you plane seem anemic on take off? Mine has had small RPM
    drop and poor climb performance since it came out of annual. I'm
    thinking that my carb heat cable may have slipped a little (allowing a
    little hot air in all the time and rob me of power).
    I don't have any proof yet, but all the takeoffs I made while going down
    to fort worth seemed to be a little lacking in the power area. (at 150
    HP, I didn't have much to spare anyhow).

    Jay

    --- cloydvanhook@imtt.com wrote:

    > It seems lately that I get NEGLIGIBLE rpm drop when I pull carb heat
    > after the run up.
    >
    > I used to see about 100 rpm drop.
    >
    > Is that likely because it been so HOT lately?
    >
    > Or does my recent incident of having a mud dobber and a frog in my
    > carb throat mean I should go back in and check to see that the
    > butterfly is closing fully when the carb heat is OFF.
    >
    > Specs.
    >
    > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    >
    > The carb is a Marvel-Schebler Model MA-4-SPA, P/N 10-3678-32.
    >
    > I think I know the answer, (unfortunately) just wondering how much the

    > high temps could affect the rpm drop with carb heat.
    >
    > Cloyd
    > President, BAC
    > > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >


    __________________________________________________
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    Tired of spam? Yahoo! Mail has the best spam protection around
    http://mail.yahoo.com _______________________________________________
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    BAC-Mail@beechaeroclub.org
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    _______________________________________________
    BAC-Mail mailing list
    BAC-Mail@beechaeroclub.org
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail

  5. #5

    Carb heat

    I've already thought of that... It is definitely on
    my list to get all of my carb heat drop back (and just
    see where performance is after that.)

    Otherwise, I'll be parking at BPK and riding in with
    you!

    Jay

    --- Brad Mitchell <bmitchell@aaep.org> wrote:

    > You guys better get that straightened out before we
    > go back to Gaston's.
    > That hill comes up pretty fast and the trees may
    > have grown some flying down
    > the river valley!
    >
    >
    > -----Original Message-----
    > From: bac-mail-bounces@beechaeroclub.org
    > [mailto:bac-mail-bounces@beechaeroclub.org]On Behalf
    > Of James Bruce
    > Sent: Tuesday, July 19, 2005 11:39 AM
    > To: cloydvanhook@imtt.com;
    > bac-mail@beechaeroclub.org
    > Subject: Re: [BAC-Mail] Carb heat
    >
    >
    > Cloyd, does you plane seem anemic on take off? Mine
    > has had small RPM drop and poor climb performance
    > since it came out of annual. I'm thinking that my
    > carb heat cable may have slipped a little (allowing
    > a
    > little hot air in all the time and rob me of power).
    > I don't have any proof yet, but all the takeoffs I
    > made while going down to fort worth seemed to be a
    > little lacking in the power area. (at 150 HP, I
    > didn't have much to spare anyhow).
    >
    > Jay
    >
    > --- cloydvanhook@imtt.com wrote:
    >
    > > It seems lately that I get NEGLIGIBLE rpm drop
    > when
    > > I pull carb heat after
    > > the run up.
    > >
    > > I used to see about 100 rpm drop.
    > >
    > > Is that likely because it been so HOT lately?
    > >
    > > Or does my recent incident of having a mud dobber
    > > and a frog in my carb
    > > throat mean I should go back in and check to see
    > > that the butterfly is
    > > closing fully when the carb heat is OFF.
    > >
    > > Specs.
    > >
    > > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    > >
    > > The carb is a Marvel-Schebler Model MA-4-SPA, P/N
    > > 10-3678-32.
    > >
    > > I think I know the answer, (unfortunately) just
    > > wondering how much the
    > > high temps could affect the rpm drop with carb
    > heat.
    > >
    > > Cloyd
    > > President, BAC
    > > > _______________________________________________
    > > BAC-Mail mailing list
    > > BAC-Mail@beechaeroclub.org
    > >
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    > >
    >
    >
    > __________________________________________________
    > Do You Yahoo!?
    > Tired of spam? Yahoo! Mail has the best spam
    > protection around
    > http://mail.yahoo.com
    > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >
    >




    __________________________________________________ __
    Start your day with Yahoo! - make it your home page
    http://www.yahoo.com/r/hs

    _______________________________________________
    BAC-Mail mailing list
    BAC-Mail@beechaeroclub.org
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail

  6. #6

    Carb heat

    Sorry, not the cables, the hoses!!


    <!-- Converted from text/rtf format -->
    David Snodgrass
    BAC East Central Regional Director
    Beech Be23 N6083N
    North Manchester, IN

    From: cloydvanhook@imtt.com [mailto:cloydvanhook@imtt.com]
    Sent: Tuesday, July 19, 2005 11:28 AM
    To: Snodgrass, David L.
    Subject: RE: [BAC-Mail] Carb heat




    I used to get a 100 rpm drop. Cables haven't been disconnected since the drop went away.



    "Snodgrass, David L." <david.snodgrass@unisys.com>
    07/19/2005 11:00 AM To
    "James Bruce" <j_w_bruce@yahoo.com>, <cloydvanhook@imtt.com>, <bac-mail@beechaeroclub.org> cc
    Subject
    RE: [BAC-Mail] Carb heat




    Also make sure the carb heat and cabin heat are not reversed, like mine
    were last year.


    David Snodgrass
    BAC East Central Regional Director
    Beech Be23 N6083N
    North Manchester, IN

    -----Original Message-----
    From: bac-mail-bounces@beechaeroclub.org
    [mailto:bac-mail-bounces@beechaeroclub.org] On Behalf Of James Bruce
    Sent: Tuesday, July 19, 2005 10:39 AM
    To: cloydvanhook@imtt.com; bac-mail@beechaeroclub.org
    Subject: Re: [BAC-Mail] Carb heat

    Cloyd, does you plane seem anemic on take off? Mine has had small RPM
    drop and poor climb performance since it came out of annual. I'm
    thinking that my carb heat cable may have slipped a little (allowing a
    little hot air in all the time and rob me of power).
    I don't have any proof yet, but all the takeoffs I made while going down
    to fort worth seemed to be a little lacking in the power area. (at 150
    HP, I didn't have much to spare anyhow).

    Jay

    --- cloydvanhook@imtt.com wrote:

    > It seems lately that I get NEGLIGIBLE rpm drop when I pull carb heat
    > after the run up.
    >
    > I used to see about 100 rpm drop.
    >
    > Is that likely because it been so HOT lately?
    >
    > Or does my recent incident of having a mud dobber and a frog in my
    > carb throat mean I should go back in and check to see that the
    > butterfly is closing fully when the carb heat is OFF.
    >
    > Specs.
    >
    > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    >
    > The carb is a Marvel-Schebler Model MA-4-SPA, P/N 10-3678-32.
    >
    > I think I know the answer, (unfortunately) just wondering how much the

    > high temps could affect the rpm drop with carb heat.
    >
    > Cloyd
    > President, BAC
    > > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >


    __________________________________________________
    Do You Yahoo!?
    Tired of spam? Yahoo! Mail has the best spam protection around
    http://mail.yahoo.com _______________________________________________
    BAC-Mail mailing list
    BAC-Mail@beechaeroclub.org
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail

  7. #7

    Carb heat

    I know one thing. Whether my wife comes with me or not I'm not taking off from Gaston's with full tanks again.

    I'm going to stay light and hop over to BPK to top off before heading back.




    James Bruce <j_w_bruce@yahoo.com>
    07/19/2005 11:32 AM To
    bmitchell@aaep.org, cloydvanhook@imtt.com, bac-mail@beechaeroclub.org cc
    Subject
    RE: [BAC-Mail] Carb heat




    I've already thought of that... It is definitely on
    my list to get all of my carb heat drop back (and just
    see where performance is after that.)

    Otherwise, I'll be parking at BPK and riding in with
    you!

    Jay

    --- Brad Mitchell <bmitchell@aaep.org> wrote:

    > You guys better get that straightened out before we
    > go back to Gaston's.
    > That hill comes up pretty fast and the trees may
    > have grown some flying down
    > the river valley!
    >
    >
    > -----Original Message-----
    > From: bac-mail-bounces@beechaeroclub.org
    > [mailto:bac-mail-bounces@beechaeroclub.org]On Behalf
    > Of James Bruce
    > Sent: Tuesday, July 19, 2005 11:39 AM
    > To: cloydvanhook@imtt.com;
    > bac-mail@beechaeroclub.org
    > Subject: Re: [BAC-Mail] Carb heat
    >
    >
    > Cloyd, does you plane seem anemic on take off? Mine
    > has had small RPM drop and poor climb performance
    > since it came out of annual. I'm thinking that my
    > carb heat cable may have slipped a little (allowing
    > a
    > little hot air in all the time and rob me of power).
    > I don't have any proof yet, but all the takeoffs I
    > made while going down to fort worth seemed to be a
    > little lacking in the power area. (at 150 HP, I
    > didn't have much to spare anyhow).
    >
    > Jay
    >
    > --- cloydvanhook@imtt.com wrote:
    >
    > > It seems lately that I get NEGLIGIBLE rpm drop
    > when
    > > I pull carb heat after
    > > the run up.
    > >
    > > I used to see about 100 rpm drop.
    > >
    > > Is that likely because it been so HOT lately?
    > >
    > > Or does my recent incident of having a mud dobber
    > > and a frog in my carb
    > > throat mean I should go back in and check to see
    > > that the butterfly is
    > > closing fully when the carb heat is OFF.
    > >
    > > Specs.
    > >
    > > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    > >
    > > The carb is a Marvel-Schebler Model MA-4-SPA, P/N
    > > 10-3678-32.
    > >
    > > I think I know the answer, (unfortunately) just
    > > wondering how much the
    > > high temps could affect the rpm drop with carb
    > heat.
    > >
    > > Cloyd
    > > President, BAC
    > > > _______________________________________________
    > > BAC-Mail mailing list
    > > BAC-Mail@beechaeroclub.org
    > >
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    > >
    >
    >
    > __________________________________________________
    > Do You Yahoo!?
    > Tired of spam? Yahoo! Mail has the best spam
    > protection around
    > http://mail.yahoo.com
    > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >
    >




    __________________________________________________ __
    Start your day with Yahoo! - make it your home page
    http://www.yahoo.com/r/hs

  8. #8

    Carb heat

    They're OK.



    "Snodgrass, David L." <david.snodgrass@unisys.com>
    07/19/2005 11:33 AM To
    <cloydvanhook@imtt.com> cc
    <bac-mail@beechaeroclub.org> Subject
    RE: [BAC-Mail] Carb heat




    Sorry, not the cables, the hoses!!

    David Snodgrass
    BAC East Central Regional Director

    Beech Be23 N6083N

    North Manchester, IN


    From: cloydvanhook@imtt.com [mailto:cloydvanhook@imtt.com]
    Sent:
    Tuesday, July 19, 2005 11:28 AM
    To:
    Snodgrass, David L.
    Subject:
    RE: [BAC-Mail] Carb heat


    I used to get a 100 rpm drop. Cables haven't been disconnected since the drop went away.


    "Snodgrass, David L." <david.snodgrass@unisys.com>
    07/19/2005 11:00 AM
    To
    "James Bruce" <j_w_bruce@yahoo.com>, <cloydvanhook@imtt.com>, <bac-mail@beechaeroclub.org> cc
    Subject
    RE: [BAC-Mail] Carb heat






    Also make sure the carb heat and cabin heat are not reversed, like mine
    were last year.


    David Snodgrass
    BAC East Central Regional Director
    Beech Be23 N6083N
    North Manchester, IN

    -----Original Message-----
    From: bac-mail-bounces@beechaeroclub.org
    [mailto:bac-mail-bounces@beechaeroclub.org] On Behalf Of James Bruce
    Sent: Tuesday, July 19, 2005 10:39 AM
    To: cloydvanhook@imtt.com; bac-mail@beechaeroclub.org
    Subject: Re: [BAC-Mail] Carb heat

    Cloyd, does you plane seem anemic on take off? Mine has had small RPM
    drop and poor climb performance since it came out of annual. I'm
    thinking that my carb heat cable may have slipped a little (allowing a
    little hot air in all the time and rob me of power).
    I don't have any proof yet, but all the takeoffs I made while going down
    to fort worth seemed to be a little lacking in the power area. (at 150
    HP, I didn't have much to spare anyhow).

    Jay

    --- cloydvanhook@imtt.com wrote:

    > It seems lately that I get NEGLIGIBLE rpm drop when I pull carb heat
    > after the run up.
    >
    > I used to see about 100 rpm drop.
    >
    > Is that likely because it been so HOT lately?
    >
    > Or does my recent incident of having a mud dobber and a frog in my
    > carb throat mean I should go back in and check to see that the
    > butterfly is closing fully when the carb heat is OFF.
    >
    > Specs.
    >
    > 1963 Musketeer, M-238, Lycoming O-320-D2B,
    >
    > The carb is a Marvel-Schebler Model MA-4-SPA, P/N 10-3678-32.
    >
    > I think I know the answer, (unfortunately) just wondering how much the

    > high temps could affect the rpm drop with carb heat.
    >
    > Cloyd
    > President, BAC
    > > _______________________________________________
    > BAC-Mail mailing list
    > BAC-Mail@beechaeroclub.org
    >
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail
    >


    __________________________________________________
    Do You Yahoo!?
    Tired of spam? Yahoo! Mail has the best spam protection around
    http://mail.yahoo.com _______________________________________________
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  9. #9
    ralph_epstein_ct at yahoo
    Guest

    Carb heat

    If you are getting no decrease in RPM with carb heat I would check to make sure that engine compartment scat tubing connections are correct. If they are hooked up wrong it's possible that you are getting carb heat at all times and the carb heat control has no effect.


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