2006 INTERNATIONAL ELECTRIC TEXACO POSTAL CONTEST

Date Extended through October 2006

This International Postal Contest is open to

This is an open contest to which non-SAM teams are heartily welcomed.

DATE

A participating team will select any date during the months of June, July, August or September to make its contest flights.

SCORING

Each club’s team score will be the sum of the longest flight scores of the three highest scoring members.

INFORMATION SHARING

The sharing of information is a major part of the event. Please send in the scores of all team members, and full technical information on each plane. Dave Harding will publish it on the SAM web site.

In addition please email, for publication, a group photo of the team members with their planes. Also include, in email information, for each plane including:

Name of model, source of kit/plans, wing area, flying weight, wing loading, ballast, motor, propeller, ESC, battery type,

Number of cells, manufacturer, manufacture’s ratings,

Airplane covering material, color scheme,

Any other items of interest about the planes or the event.

GENERAL INFORMATION

Club results should be reported as soon as practical, using the attached form. Each team that enters will receive the final results shortly after the close of the contest.

The winning club will receive and hold the perpetual Electric Texaco Postal Championship Trophy (currently held by SAM 27) for one year. The winning club agrees, as a condition of entry, to organize the following year’s postal championship.

RULES

2006 SAM Electric Texaco Rules will be used, but broadened to include the more popular and lighter NiMH and LiPo batteries. This is similar to A, B and C class gas Texaco where alcohol and diesel powered planes compete together. Battery energy (equivalent to ounces of fuel) is allocated in proportion to the Flying weight.

 Intent of Rules

The intent here is to attract more flyers across the world to this friendly and enjoyable event without having to buy special batteries and chargers. In addition these rules also allow 1/2A gas models to be converted painlessly to LiPo electric flight without weight penalty.

 Definition of Pre 1943 Scale.

The appropriate wording to describe a scale postal entry comes directly from Gas Scale Free Flight on page 5 of the rule book, and contains no reference to the ADL.

A casual event. Scale model of any full sized aircraft designed or built by December 31, 1942. Plans may come from any source. No scale points are awarded….” Balsa construction with tissue, fabric or plastic covering is required.

PROGRESSION OF RULES

The Table below shows the progression from the 2005 Postal.

 

Electric Texaco Rules Comparison

 

2005 SAM Rule

used for Postal

2006

SAM Rule

2006

E Texaco Postal

Min wing loading

8 oz/sq ft

same

same

Extra ballast for Rough Weather

Ok

Pilot’s choice

same

same

Scaling

Ok

same

same

Motor

Any

same

same

Gearbox

Optional

same

same

Propeller

Any, non-folding

same

same

Motor Restart

Any time

same

same

Motor Run

Unlimited

same

Same

Score

Best of 2 flights

same

Same

Re-Fly Day

No

No

Yes

Battery Type

NiCd

same

 

NiCd Battery Weight

Max 8 oz

Max 1/3 of wt without battery

NiCd, NiMH, LiPo-Same Energy

Battery Allocation by Energy Content

Since the weights of batteries of a given capacity can vary considerably, battery allocation will be by energy content using manufacturer’s data, rather than weight.

 

Assumptions

1

All SAM legal E Texaco planes will use AUL NiCd’s (or else be non-competitive).

2

This allowance of 0.55 Watt hours/oz of airplane weight (less battery) is to all practical purposes the same as the SAM rule for NiCd’s. It’s just expressed in energy instead of weight.

3

We can now apply the 0.55 Watt hours / ounce rule (above) to any other battery chemistry.

See the tables of allowable batteries for models of various weights.

Download the battery calculator; must have Excel on your computer.

For help, email:

Andrew Tickle tickleac@aol.com

Dave Harding davejean1@comcast.net

Steve Roselle Rosy@cheerful.com

 

Re-Fly Rule

The second new rule, for this postal event, is to allow a team to repeat their flights at a later date if they feel they were penalized by the weather. This is an attempt to level the world-sized flying field on which the flying conditions differ and change dramatically on any given day. Since the weather can deteriorate rapidly to worse than the original day, the score is the best team score of the two days. Flight times may not be transferred between days.

Setting up 1/2A (gas) for Electric Flight

The largest and most widely enjoyed event has been the 1/2A (gas) Texaco. These planes have the same minimum 8-oz/sq ft wing loading, typically have 288 sq in area (2 sq ft) and weigh 16 oz. The 1/2A Texaco class has a large number of existing flying models, kits and plans. They can be easily converted to electric flight without weight penalty. The resulting quiet and lightweight electric airplane can be flown unobtrusively in many public places without driving to distant flying fields.

Simply remove the 2 oz Cox 0.049 and the 2 oz receiver battery and replace them with a small brushless motor, speed controller (which powers the receiver) and a 1 oz LiPo battery. These planes can also be flown with the heavier NiCd’s in standard SAM electric events, and quickly switched back on the field to the original gas Cox engine with its self-contained tank.

Similarly the larger A, B, and C class Old-Timers can be switched back and forth between gas and electric, and Standard SAM Electric Rules.

 SOURCES for KITS and PLANS

 

Bob Hartwig's B&W 1/2A Models , 11206 Trentman Rd, Fort Wayne, IN 46816 Bjhart@infoline.net Tel (260) 639-6510

 Bob Holmanpartial kits and plans, email bhplans@aol.com

web site http://www.bhplans.com Tel (909) 885-3959

 Klarich Kits ,http://www.klarichkits.com/

or call Harry at (916) 635-4588


Spirit of Yesteryear web site is htpp://www.soy.on.ca

 

CD Andrew Tickle
Member at Large, SAM 27
723 Vanessa Way ,
Petaluma ,
CA 94952
Phone (707) 773-3857
Fax (707) 769-0342
Email tickleac@aol.com