Pitts Special ARF (GPMA1218)
Tech Note

Note #1:     May 14, 2002

We have discovered that some of the Pitts Special ARF top wings have the cabane bracket mounting holes drilled slightly too far forward. This places the holes too near the front of the internal hardwood mounting spar. If the screws are installed in this location, the mounting spar may crack, resulting in unacceptable weakness.

We have taken action to alleviate this problem in future shipments. Please check your wing for the word UPDATED to be stamped on the ends of the root ribs, or for a large white square sticker on the under side of your center section. If your model does not have either of these, please check your wing for this condition immediately, as described in the PDF file below, and take the appropriate corrective action if necessary.

PDF Alert - Cabane Mounting Holes
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Note #2:

A manual addendum is available for this plane on our manuals page. The addendum provides updates to the following pages/steps:

  • Page 7, Parts List Changes
  • Page 9, Step 12
  • Page 10, Steps 3 and 14
  • Page 11, Steps 5, 6 and 7
  • Page 14, Step 10 and 11
  • Page 17, Step 9
  • Page 19, Steps 5 and 7
  • Page 20, Steps 8, 10, 12 and 13
  • Page 27, Step 3 and 4

Note #3:     October 15, 2002

If you are installing a large engine, please see manual addendum #2 on our manuals page for important information.

Note #4:     April 28, 2004

For "A-Brace" type Aluminum Spinners used in:

  • Great Planes Giant Christen Eagle II ARF (GPMA1217)
  • Great Planes 1/3-Scale Pitts Special ARF (GPMA1218)
  • Great Planes Little Toni 61 ARF (GPMA1320)
  • Great Planes 1/4 Extra 300S Wagstaff Extra ARF (GPMA1305)
  • Great Planes Spinner 1/3 Christen Eagle II ARF (GPMA2453)

Please observe the following precautions when using these spinners:

The spinner should only be run as a fully assembled unit. Never run the engine with the spinner backplate in place without the spinner cone installed. The steel "A-Brace" is not designed to be run unsupported by the front cone screw and could fly off and cause property damage and/or bodily injury.

Periodically check to make sure the spinner cone is secure. If you notice any looseness, remove the spinner cone and inspect the steel "A-Brace." The rivets should be holding the "A-Brace" tightly to the backplate. If this is not the case, replace the entire spinner.

If, when installing the spinner cone to the backplate, you notice that the front bolt bottoms-out before the cone is tight against the backplate, replace the entire spinner.

Inspect the aluminum spinner before each flight and replace the spinner if you notice any wear or cracks.

Great Planes Model Manufacturing