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 on: Today at 07:14:07 PM 
Started by proparc - Last post by Gerald Arana
Looking for ST 60's in new or very good condition. I know you guys have got them because, all of you have gone electric . Layingdown Layingdown

Milton, Did you see that one that went for over $1000.00 on the Bay? Huh

I couldn't believe it either. Shocked


PS: There is one in this column a little further down. Check it out. y1

PS: I don't have one. (And I don't want one) I like my Enya's 7033's.

 on: Today at 07:08:43 PM 
Started by jim gilmore - Last post by Rosie Rosenau
Epoxy is probably best so I used EXTRA THICK super glue and sandwiched the body with wax paper and added a wide plank of ply and then weight. Per set for an hour... It is super glue and then sanded smooth and added more glue in any crevasse and hit them with exxellorator because super glue takes such q long time to cure... unless it is on my fingers.

 on: Today at 07:04:03 PM 
Started by David Fountain - Last post by Tim Wescott

If you want to get into competition that Ringmaster will work out well in Old Time stunt.  You can even eke out a respectable score in regular stunt -- if you say "with a Ringmaster" after your score!

 on: Today at 07:01:38 PM 
Started by Robert Storick - Last post by Tim Wescott
I'm in.

 on: Today at 06:59:00 PM 
Started by badbill - Last post by David Fountain
Hi man this is David You fly C/L? I used to fly it years ago and I'm now getting back active in it. Just rejoined GAMA about a month ago.

 on: Today at 06:31:21 PM 
Started by Avaiojet - Last post by John Stiles
I see nothing that even resembles a dead horse. Where was I when all this was going on??? You ARE going to finish it...correct?

 on: Today at 06:25:09 PM 
Started by Greg Rodney - Last post by Wade Bognuda
It's an Airtractor. Nice!!

 on: Today at 06:16:08 PM 
Started by proparc - Last post by Bootlegger

 Prop arch I sent ya' a private message.

 on: Today at 06:15:26 PM 
Started by Rusty Pieper - Last post by Brett Buck
I just emailed you Leonard Neumann's chart. I refer to it when I have to make a venturi for an offset spraybar, like TT's, ST's, and some others. In general, I always use a .157" spraybar and a .272" venturi will work fine from .25LA to .46 LA and beyond. The reason I always use a .157" spraybar is because I don't like OS NV Assy., and by using a .157", I can use a lot of different brands...but usually Randy Aero's.  Hoff Steve

   Unfortunately this chart is incorrect, and it's based on incorrect assumptions, specifically, that the choke area should be somehow a simple function of the displacement. It isn't. It will tend to give an abnormally small venturi size for small engines, and oversize venturis for large engines. You only need the small end, particularly, if you turn the engine abnormally slowly, which will cause you to use a very large prop with lots of pitch.

    On the other hand, a .272 venturi with a .157 (ST) spraybar is right in the normal range for venturi at .0178 square inches of choke area. The normal range is around .0175 to .0190 square inches, and it's not a straightforward relationship to displacement. I think Dave won the 2008 WC using something a little smaller than .0175 on a 75. The smaller engines tend to the high end - not that the 75 wouldn't work with .0190 or larger, it's that you can't figure out how to get rid of all the power that would provide.


 on: Today at 06:07:29 PM 
Started by Frank Wadle - Last post by Dan McEntee
   I would say the answer is in the oil. That is the main thing that has changed.The castor oil probably made it run a bit cooler. Castor helps carry heat out of the engine in addition to lubricating. The synthetic is probably not doing the same job. The engine may seem to be running OK, but there may be a fine line where if it gets to a bit higher temp, while nothing catastrophic may be happening, it's heating up enough to have enough clearances in the top end that it won't support combustion. probably not enough residual oil left behind either to help that out. That's my 2 cents worth.
  Type at you later,
   Dan McEntee

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