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Club 40 Rules


The 2011 RCPRO Club 40 Rules and documents for racing

Club_40_2011_Rules_for_the_Airplane.doc - Web Page Format



Notes from Ken Erickson, RCPRO Club 40 Committee Chairman

Explanation of Changes for 2011

There are a few changes in the RCPRO Club 40 “Rules” document and also in the “Procedures” document. Starting from the top of the “Rules” document, they are:

New Wording in “Airframe Regulations”: Wheels must have minimum diameter of 55 mm and minimum width of 20 mm. Hint: Stock wheels (60 mm) or DuBro 2 1/4 Low Bounce (57 mm).
Reason: We want as much uniformity as possible in the airframe drag.
We have been informed that the stock wheels wear away for those flying from hard surface runways. Some get very small. We were asked to specify a minimum size for wheels in use and to allow a harder wheel, slightly smaller than the stock wheel. As I fly from grass at almost all the fields around Columbus, In, I did not know this. After verifying the wear, by checking with committee members and other promoters around the country, I checked out available wheels. The DuBro Low Bounce wheels are harder rubber and the same width as the stock wheels. They are 57 mm in diameter. This change was submitted to the committee and officers and approved. New stock wheels are 60 mm in diameter. When your wheels have worn to 55 mm in diameter, get a new set of stock wheels or a new set of DuBro Low Bounce or some other 20 mm wide hard wheel.

New Wording in “Propulsion Systems Regulations”:
Wording transferred in from the “Procedures” document, with clarification: Parts, which may be changed and may come from any source: Bearings, Gaskets (& head shims), Glow plug, head and crankcase bolts, propeller nut & washer and Remote needle valve assembly.
Reason: This was the only line about what goes up in the air that was not in the one-page “Rules” document, where it belonged. The clarification, after much discussion, is that head shims may be removed, changed or added. We do not recommend it, but it is not forbidden. AMA rules silently allow this; we state it. Note that Backplate Engine Mounts have been removed and are not to be used.

New Wording in the line for “Acceptable Alternatives”: or any clones/copies of the listed engines.
Reason: We were asked to allow more brands of engines. If someone has a sport .40 engine, probably not as good as the best brand, they should still be able to give it a try. This wording was submitted to the committee and officers and was approved. We do not recommend buying a cheap, inferior engine, if you do not have a .40. But we do want people to get their feet wet in this event with sport engine to which they already have access.

New Wording in the line for “Sport/Novice Class Engines”: or clones.
Same reason.

Changes in the “Procedures” document:
The “Parts which may be changed” line was removed, transferred to the “Rules” document.
Reason: See above.

Recommendations for the matrixing and scoring programs from Paul Herman were added in the appropriate places.
Reason: They work fine, and have for years.

A recommendation for the NMPRA JudgeTimer program, written by Stan Douglas and significantly updated by Hank Kaufman was added.
Reason: Once you check it out, you will know. It is great. You can test it using the mouse or keyboard .

The “Addendum: Racecourse Personnel and their Duties” has not changed.


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