September 2020 Meeting Minutes

The September 2020 meeting of the North Dallas RC Club occurred on September 16, 2020 via ZOOM
due to COVID restrictions. President Dave Schaefer called the meeting to order at 7:00 PM.
A motion was made, and seconded, to approve August 2020 meeting minutes as published. Approval
passed unanimously, by voice vote.
VISITORS – New Member Chandler Wrightman
Tower has a sale on various items including Monokote and Saito Engines.
Pay attention to the COVID guidelines
Airfest Rocket event was held September 4-7 at Argonia, Kansas Rocket Pasture. Good attendance with
3-400. Strict COVID guidelines were followed. David Schaefer’s rocket reached an altitude of 3043
Congratulations to Dale O’Daniel. He got Large Model Accreditation on his large scale Cub.
No Report.
Dave reported the financial condition as of the end of August. .
A motion was made, and seconded, to approve the financial report as presented by Dave. Approval
passed unanimously, by voice vote
Bruce reports 164 members as of the date of the meeting.
FIELD REPORT — Rodney Mcentire:
Field looks good thanks to the recent rains and mowing by Charles Schafer, Rex Lawerence and others.
SAFETY REPORT — Charles Schafer:
No incidents reported.
SOUND REPORT – Billy Slater:
A report on the club’s “sound status” along with proposed sound rule changes in the New Business

TRAINING – Rich Phillips:
No training is taking place primarily due to the COVID restrictions
A high speed electric ARF was raffled in an internet raffle.
GSW had a big bird event that drew 105 pilots.
None Discussed.
Billy Slater gave an overview of our sound impact on the new residential areas to the NW and SE of the
field. We are in compliance with Aubrey sound Ordinances but do face some potential problems.
Josh Kleen presented proposed modifications to sound rules to minimize these potential problems.
These proposed new rules will be voted on in the October meeting. These proposed rules are:

NDRCC Sound Rules – 2020 Revision

The goal of the North Dallas RC Club is to provide our members a safe, well maintained
facility to enjoy model aviation
while minimizing our impact on the surrounding community. To minimize the amount of
noise that leaves our field and is audible in the surrounding community and to comply with
local ordinances regarding noise and the operation of model aircraft, the following rules are
established for all models operating at Eagle Field.

  1. From the beginning of Daylight Savings Time in the Spring, until the end of Daylight Savings
    Time in the Fall, Daytime hours shall begin at 9:00am and end 60 minutes prior to sunset.
  2. From the end of Daylight Savings Time in the Fall, until the beginning of Daylight Savings
    Time in the Spring, Daytime hours shall begin at 9:00am and end at sunset.
  3. Evening hours will begin when Daytime hours end and will continue until 10:00pm.
  4. All models are limited to 100dBa during Daytime Hours
  5. All models are limited to 90dBa during Evening hours
  6. No internal combustion powered models may be flown between 10:00pm and 9:00am.
  7. Electric powered models may fly between 10:00pm and 9:00am, however, they must
    comply with the 90dBa limit during this time.
  8. Turbine powered aircraft are exempt from sound limits, however, they may only be flown
    during Daytime hours.
    The sound level of all aircraft flying at the NDRCC field shall be subject to a sound check
    measured with the Club’s dB meter, set to the “A” weighting, slow response and with the
    windscreen installed.
    The meter may be held or placed on a stand approximately 24″ above the ground, crosswind
    and perpendicular to the side of the aircraft at a distance of 25 feet. The test area should be
    in the “south infield” area, clear of buildings and the runway. A minimum of a 5 second full
    throttle engine run is required.
    All Club Members are empowered to conduct Sound Checks. However, the NDRCC Board may
    also appoint designated members (Sound Testing Members) to carry out Sounds Checks when
    an aircraft is suspected of being over the dB limit.
    Often minor throttle programming adjustments can be made at the field which will reduce
    the noise level sufficiently to allow aircraft to continue to fly that day. However, if minor
    adjustments do not reduce the noise level sufficiently, the aircraft cannot fly at Eagle Field
    until appropriate modifications are made.
    Common ways to reduce aircraft dB Levels;
    • Use the correct engine application for the model. Excessive engine sizes are hard on
    airframes and also hard to muffle properly.
    • “Pitts style” mufflers are better than side mounted exhaust diverters. When it comes to
    mufflers, larger is almost always quieter.
    • Three blade props are usually quieter. Second choice is smaller diameter, higher pitch 2
    blade props (example 20 X 10 versus 22 x 8).
    • Canisters and muffled tuned pipes can really reduce exhaust noise if your aircraft has
    adequate room.
    If an aircraft exceeds the sound limit, and there are no commercially available accessories to
    enable the aircraft to meet the sound limit, the owner may apply for a Waiver from the
    NDRCC Board by submitting a completed Waiver Application to the Board via the Sound
    Testing Member. The Board may either approve the Waiver or make recommendations to
    help reduce the sound level. The aircraft will be re-tested following any modifications. After

reviewing the re-test results, the Board shall decide if a waiver is applicable. If at a future
date commercially available accessories become available that will enable the waivered
aircraft to meet the specified noise limits, the aircraft shall be modified immediately or not
fly at Eagle Field. Sound waivered aircraft may only fly during Daytime hours.
Sound Checks may be waived for special events when recommended by the Event CD and
approved by the NDRCC Board.
Business portion of meeting closed at 8:10 PM