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Also, the Racing SIG was remiss in failing to ban this trick in slow rat and other "tamed-down" racing events. But they let it slide, thereby nullifying the effect of the suction rule.
As is so often the case, Paul, you are full of ....
Let's take the events, one by one.
AMA events: Only Slow Rat is dictated to be a "suction" event and the rules clearly state (for those who will read them):
Pressure fuel systems are not allowed with the exception that the fuel tank
vent tubes may be directed into the airstream. The engine must have a
fixed size (non-adjustable) choke area venture. Engines equipped with
factory type RC throttles or carburetors must have the variable intake
portion of the carburetor locked in position throughout the flight.I have made bold the pertinent words.
For the NCLRA events:
Fox Race requires box-stock engines. I am relatively certain that Fox did not produce a stunt 35 with a swing-weight carburetor.
Super Slow Rat clearly disallows a swing-weight carburetor. The rules read (also if one would actually READ them):
There are no restrictions on venturis or needle valves other than venturis must not be of the swing-weight type.Quickie Rat specifies the maximum venturi diameter which inherently does not allow a swing-weight carburetor.
The other NCLRA events are not "suction only" events.
That leads to the various local rules, most notable currently is the Dallas Sportsman Goodyear, where the rules specify the venturi configuration for the ASP/Magnum engines, and which require a stock/production engine otherwise.
That is, if one is willing and able to READ the rules.
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