Fly-In - Speed Events for 2019

Paul Smith air vice marshall

There are four speed events with three awards per event. 

Models, engines, lines, and pull test will be per NASS Perky rules, and Saint Louis Fox 35 Stunt Speed rules. 

Two Way Sport Speed is a unique event without rules published elsewhere.   This event has been created in response to the need for a participation speed event.

A contestant may use several models. Only his fastest score in each event counts.

Time-permitting, a contestant may make several scores per event. 

An airframe and/or engine may be used by only one contestant.

These fun speed events are designed to give the flyers a good chance to work with their models and improve performance.  There are no specific time limits or numbers of attempts.

Lines and Laps.

  • Perky:  .014” x 52’-6’’:     - 16 laps from a standing start.
  • Two Way Sport Speed:  .015’ x 59’-6” - 14 laps from a flying start, 7 laps each way.
  • Fox 35: .016” x 60’-0”:      14 laps from a standing start.


  • 10% nitromethane with  20% oil for Perky
  • 5% nitromethane with 25% oil for Fox 35 & Sportsman
  • 10% nitromethane and either 20, 22, 25 or 29% oil for Sportsman Stunt Speed




This year  there are two classes, Sportsman and Expert.   Experts are defined as:

  • Those who have exceeded 100 MPH in Fox 35 or Perky Speed
  • Those who chose to enter expert
  • Sportsman who achieve a score that wins an award in Expert

All flights must ROG.  Seven laps must be flown CW and seven laps CCW on the same flight.   The score is the total of the best seven laps in each direction.  Contestants may make several half-mile runs during a single flight with the best time in each direction used for scoring.

Scores will be posted in MPH to the hundredth. The event will be held on the paved circle on Wednesday morning.  In addition, there may be an opportunity to get official flights in on Monday and Tuesday.  The event will close out at 1 PM Wednesday.

This is a participation event.  The intent is to provide an event that can be flown with stock engines and sport/stunt airframes.

Airframes – This event allows only sport planes with built up or foam airfoil wings and the general configuration of a sport plane and are capable of doing basic aerobatics such as a lazy eight and the reverse wingover.  The airplane must take off and land with a fixed landing gear.

Engines - Only stock plain bearing baffled-piston engines of the nominal 36 size are allowed.  Any fixed venturi is permitted.  The suction fuel requirement effectively limits choke area.   All Johnson, Nelson and Supertigre engines and Foxes other than the 35 Stunt are excluded.  Allowable engines are Fox 35 Stunt, OS Max, K&B, Enya, McCoy, and Veco.