Page 2 of 11 FirstFirst 1234 ... LastLast
Results 11 to 20 of 103

Thread: H-D Production IoE V-twins 1909-1929

  1. #11
    Join Date
    Jul 2002
    Location
    North Hills, CA and Pine Grove, CA
    Posts
    5,030

    Default

    I am sure you mean American Machine & Foundry, not AMC.
    Be sure to visit;
    http://www.vintageamericanmotorcycles.com/main.php
    Be sure to register at the site so you can see large images.
    Also be sure to visit http://www.caimag.com/forum/

  2. #12
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    3,305

    Default

    Quote Originally Posted by Steve Swan View Post
    Also, what made an "automatic" carb different from a "non-automatic" carb ?
    Good question, Folks!

    Hopefully 'automatic' meant it put itself out when it caught fire.

    ....Cotten
    PS: Before Folks think I am just being flippant, please consider if it has a Schebler H Model with an airvalve.
    (I hope so.)
    Last edited by T. Cotten; 09-19-2017 at 05:26 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  3. #13
    Join Date
    Aug 2013
    Posts
    480

    Default

    Quote Originally Posted by Chris Haynes View Post
    I am sure you mean American Machine & Foundry, not AMC.
    Thanks Chris ! of course, AMF, is what i meant !

  4. #14
    Join Date
    Aug 2013
    Posts
    480

    Default

    Quote Originally Posted by T. Cotten View Post
    Good question, Folks!

    Hopefully 'automatic' meant it put itself out when it caught fire.

    ....Cotten
    PS: Before Folks think I am just being flippant, please consider if it has a Schebler H Model with an airvalve.
    (I hope so.)
    Thanks Tom, for your comments. When i read the 1907 featured an "automatic" carburetor, i wondered if "automatic vs. non-automatic" had something to do with mixing air and fuel in a ratio suitable for efficient combustion....? in years past, i seem to recall reading very early, primitive types of carb design somehow regulated the rate fuel dripped into the carburetor, not too much to flood the combustion chamber but enough to allow combustion when raw fuel and air were drawn in to the combustion chamber.....? or, am i just having a fanciful idea.....?

    and, back to Robbie's comment on atmospheric intake valves, this design had no direct mechanical actuation...... ?

  5. #15
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    3,305

    Default

    I've got no clue about earlier carbs, Steve!

    Nobody has trusted me with one.

    But the advantage of an 'automatic' snuffer should be obvious.

    ....Cotten
    Last edited by T. Cotten; 09-19-2017 at 06:32 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  6. #16
    Join Date
    Sep 2005
    Location
    Sarasota, Florida
    Posts
    3,475

    Default

    It looks like the '09 double may have a H model Schebler, but there is no way to verify the '08 did. Also, there is no way to know if the '09 originally had a Schebler. There were many different carburetor manufacturers in those days, including Harley-Davidson. As for an automatic carburetor, I know that in those days, some carbs were very crude so perhaps it refers to a carb with a float. As for atmospheric intake valves, they were very common in the early days. Indian went mechanical in 1908, H-D went mech. on their twin in 1911, but not till '13 on their singles. Atmospheric intake valves were simple, and efficient for the slow speeds, and poor roads of the day.
    Eric Smith
    AMCA #886

  7. #17
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    3,305

    Default

    Just conjurin' Eric,..

    But if the legend that Ole Evinrude used a tomato can has any basis at all, wouldn't it have been for a float 'bowl'?

    Using one for a body would certainly have invited a melt-down.

    And it would have been one very, very large "'venturi'"!

    ....Cotten
    PS: I admitted I'm clueless about pre-George Schebler designs, so any pics or literature would be appreciated!
    Last edited by T. Cotten; 09-19-2017 at 06:47 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  8. #18
    Join Date
    Aug 2004
    Location
    Beautiful Northern New Mexico
    Posts
    2,176

    Default

    and, back to Robbie's comment on atmospheric intake valves, this design had no direct mechanical actuation...... ?
    Correct Steve, they operated by the negative pressure created in the downstroke sucking them open. As simple as it gets.
    Robbie Knight Amca #2736

  9. #19
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    3,305

    Default

    I suspect, Steve,..

    They had a mechanical means to close the valve: a spring.

    Just like the airvalve on a Schebler H.

    ....Cotten
    PS: But those were adjustable!
    Any knobs on atmospheric motor intake valves? Shoulda been...
    Last edited by T. Cotten; 09-19-2017 at 07:00 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  10. #20
    Join Date
    Sep 2005
    Location
    Sarasota, Florida
    Posts
    3,475

    Default

    My '11 Merkel twin has atmospheric intake valves; and you're correct, Tom, they have a conical spring return, but no adjustment for spring pressure, or dwell. That was all calculated by the engineers of the day.
    Eric Smith
    AMCA #886

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •