Sometime ago....

[Bootlegger]

    I don't remember when I had posted about my Brodak 40 usin so much fuel, but I had commented that I had filled the venturi with J B weld and drilled it out to .272, wanted to try it but weather and other things had prevented it.  Yesterday I got to fly it, and I was gettin 6:30 out of 4 oz 5% N  22% oil blended usin a Tbolt idle bar plug with 10x5 APC prop, model weight is 42 oz lines are 59' eye to eye and 5.2 lap times, plenty of power everywhere in the pattern.
  I flew 4-5 times and the engine was very consistant, very steady, fairly deep 4 cycle breaking into a two at the right times...
  I didn't "dress" the top of the ventuti, no taper, just left it flat, had some questions as to weather this would work or not, can report here that it worked just fine.
  Just a follow up on an earlier post..  Hope that this helps some one else with questions...
 

[john e. holliday]

Try and 11-4 prop sometime.  That is what I use on my B-40, one of the early ones.  Still box stock and only using 4 ounces of fuel for the pattern.  Have fun,  DOC Holliday

[Matt Colan]

I have an early Brodak 40, and I use an 11-5 Zinger prop at around 8800 RPM.  I'm using 4 ounces of fuel for a full pattern and I have plenty of time to fly a pattern.  That motor is in my OTS plane, which was my competition plane last year.