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Thread: F1 Eurosport Crown Gears

  1. #16
    Join Date
    Jun 2002
    Location
    Paonia, Colorado
    Posts
    1,452
    I forgot 3 things:

    1) All or almost all of the top world ISRA drivers use glued on the axle and statically balanced spurs. They also statically balance their rear wheels.

    2) If I ran grp 7 or 27 wing cars (which I don't and I don't know anything at all about), I would most certainly try out the pinion run-out gauge and static balancing of the rear wheels.

    3) Roger S and I did an experiment a couple of years ago with a hawk powered 1/32 car at Mid Am on the Monster, in which we tried a new spur, good axle, and new rear wheels straight and then with the entire assembly carefully statically balanced. The balanced car was slightly but perceptibly quicker (0.05-0.1 s per lap), but the car was much quieter and ran very much smoother than the unbalanced one.

    Greg

  2. #17
    Join Date
    Dec 2011
    Location
    FLORIDA U.S.A.
    Posts
    298
    Quote Originally Posted by swiss View Post
    What pitch are the Vitula?
    72p

    http://www.slotcartalk.com/slotcarta...ne-crown-gears

  3. #18
    Join Date
    Jun 2002
    Location
    Charles Town, WV
    Posts
    1,252
    Check any gear you use carefully; 2mm axles are not allowed. Rules call for the use of 3/32 axles only...

  4. #19
    Join Date
    Jan 2003
    Location
    Denmark
    Posts
    151
    "Check any gear you use carefully; 2mm axles are not allowed. Rules call for the use of 3/32 axles only..."

    That is news to me, and it proably new to all of those who have signed up for the ISRA-worlds in Latvia in October.

    Honestly, which races are you talknig about, because it's definitely NOT ISRA .

    BR

    Steen

  5. #20
    Join Date
    Jun 2002
    Location
    Charles Town, WV
    Posts
    1,252
    I'm very sorry. You are correct. I mixed up classes. My statement was in reference to a new IRRA retro class here in the USA. Some people are considering useing these gears in their cars. In that class only, not ISRA, you are limited to 3/32d axles.

    ISRA has no restriction for axle size for 32d F1 Eurosport.

    Again, sorry for the confusion.

  6. #21
    Join Date
    Jan 2008
    Location
    Breinigsville, PA
    Posts
    155
    The JK gear is available for a 3/32 axle.
    Jon Madtes
    Penn/Jesery NASCAR Series
    Motors by Mic B
    TEAM BLACK TOWEL
    Fast Tracks Raceway
    USRA D-2 Supporter

  7. #22
    Join Date
    Jun 2002
    Location
    Paonia, Colorado
    Posts
    1,452
    Yes, Jon is correct. Back when we ran 3/32" axles in 1/32 F1, we had 3/32" little green JK gears. I presume that these are still available, and that Jim Radford, Frank Sarkela, and the NJ guys can get them for you, maybe Mike Swiss, too. I don't know of the vitulas come in 3/32". I doubt if the czechs blueprint the JK greens in 3/32.

    As to the pitches: As above, the vitulas are indeed 72 pitch. The JK greens are supposedly 64 pitch, but as far as I know, everybody uses 6 or 7 tooth 72 pitch pinions on them. This works just fine. I advise not trying this on other crown or spur gears though. :-)

    Greg

  8. #23
    Join Date
    Jun 2002
    Location
    Paonia, Colorado
    Posts
    1,452
    Jon,

    I want a black towel, too! :-)

    Greg

  9. #24
    Join Date
    Dec 2005
    Location
    England
    Posts
    173
    The JK green gears in 2mm are nearly all perfect, for some reason the 3/32 axle ones can be a little wobberly. (is that a word!!!??) The green gears with a 72dp pinion will also allow you to offset the motor (.020) in the same way the vitual is offset. To take out the wobble on the gear, mesh it and heat it with a lighter or the soldering iron as it is rotating. There are some new SK gears coming onto the market, which I havent had a chance to test yet.

  10. #25
    Join Date
    Feb 2005
    Posts
    3,399
    Where is SK out of ?

    Thanks.
    "Get Yourself Retrofied"
    Chicagoland Raceway
    17B West Ogden Ave.
    Westmont,Il. 60559
    Phone-708-203-8003
    mikeswiss86@hotmail.com

    Check out Chicagoland Raceway on facebook.

  11. #26
    Join Date
    Jan 2008
    Location
    Breinigsville, PA
    Posts
    155
    Greg,
    I personally do not run a 3/32 axle in my F-1. I was just putting the options out there for the JK gear.
    I also run a 7 tooth 72 pitch pinion. At least that's what I think is on it.

    I'm sure we can come up with something for you at the 2015 URSA nats regauding a towel. Lol
    Jon Madtes
    Penn/Jesery NASCAR Series
    Motors by Mic B
    TEAM BLACK TOWEL
    Fast Tracks Raceway
    USRA D-2 Supporter

  12. #27
    Join Date
    Apr 2004
    Posts
    127
    The Walmart down the street is the official supplier of black towels to the NJ ISRA club.

  13. #28
    Join Date
    Jun 2002
    Location
    Paonia, Colorado
    Posts
    1,452
    Thanks, Brian! I forgot all about the hypoid business. Both jk greens and vitulas run fine with the motors flat on the deck, meaning slightly hypoid.

    Jon, I look forward to the towel! I thought that you probably ran 2mm axles. Pretty sure almost everyone uses them in 1/32 ES and F1.

    So now we have a word from a truly fast guy. I'll shut up.

    Greg

  14. #29
    Join Date
    Jan 2008
    Location
    Breinigsville, PA
    Posts
    155
    Greg, you must be talking about either Bill or Brian cause I know your not talking about me!!! LOL.
    Jon Madtes
    Penn/Jesery NASCAR Series
    Motors by Mic B
    TEAM BLACK TOWEL
    Fast Tracks Raceway
    USRA D-2 Supporter

  15. #30
    Join Date
    Jun 2002
    Location
    Paonia, Colorado
    Posts
    1,452
    Jon,

    That's funny! I've run in many heats with you, likewise with Bill. I don't ever recall running in the same heat with Brian. :-)

    Greg

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