Division B Events

Division B Events

admin Mon, 2008-08-11 16:20

Questions must be directed toward the rules. We cannot pre-judge your device by answering questions on whether it complies.

Earth/Space Science

Earth/Space Science

admin Tue, 2008-08-12 08:40

Dynamic Planet - Div B

Dynamic Planet - Div B

admin Tue, 2008-08-12 08:40

Are the basins limited to only those mentioned in parentheses, or can others be included as well?

Are the basins limited to only those mentioned in parentheses, or can others be included as well?

ceann Sat, 2017-02-11 15:10
The test should be limited to the types of basins listed in the parentheses.

Meteorology

Meteorology

admin Tue, 2008-08-12 08:44

Reach for the Stars

Reach for the Stars

admin Thu, 2009-09-10 15:37

Road Scholar

Road Scholar

admin Tue, 2008-08-12 08:45

Rocks and Minerals

Rocks and Minerals

admin Tue, 2008-08-12 08:43

Inquiry/Nature

Inquiry/Nature

admin Tue, 2008-08-12 08:45

Bottle Rocket

Bottle Rocket

admin Tue, 2008-08-12 08:45

Is it mandatory for the pressure vessel to be made from a carbonated beverage bottle or can it be made of a regular drinking water plastic bottle?

Is it mandatory for the pressure vessel to be made from a carbonated beverage bottle or can it be made of a regular drinking water plastic bottle?

ceann Sat, 2017-02-11 14:48
The pressure vessel MUST be made from a carbonated beverage bottle that is 1 liter or less in capacity. Plain water bottles do not fit the criteria. Carbonated water bottles would fit the criteria.

Experimental Design - Div B

Experimental Design - Div B

admin Tue, 2008-08-12 08:46

In reference to "may bring a ruler," can a meter stick or tape measure be used?

In reference to "may bring a ruler," can a meter stick or tape measure be used?

ceann Mon, 2017-03-06 21:17
Yes, a meter stick or tape measure may be used. All of the definitions found for ruler follow the Definition of Ruler by Merriam-Webster (https://www.merriam-webster.com/dictionary/ruler) ... 2 : a straight strip (as of plastic, wood, or metal) with a smooth edge that is marked off in units and used for measuring or as a guide in drawing straight lines. Please note the definition requires a straight strip, it does not indicate min. or max. lengths.

Fast Facts

Fast Facts

admin Tue, 2008-08-12 08:45

Are elemental symbols considered to be abbreviations? For example, could Na be a valid answer for an element beginning with the letter N or must "sodium" be used?

Are elemental symbols considered to be abbreviations? For example, could Na be a valid answer for an element beginning with the letter N or must "sodium" be used?

admin Mon, 2016-10-31 18:19

It depends on the description of the category. If the category was "name of element" then the atomic symbol could not be used. If it was "nuclear (atomic) symbol" then the name could not be used. However, if the category was "element" or "chemical element" the student could use either the name of the element or the nuclear (atomic) symbol. Please note that if the category was "name of chemical compound" and the letters were "N" and "S" the student could not use "NaCl" and "sodium chloride" as both terms are different forms for the same substance. (rule 3.g)

Confused how to apply rule. Examples: CATEGORY=Parts of Human Ear, LETTER=E, ANSWER=Eardrum. Ok to start with “ear”? LETTER=D, ANSWER=Drum. Ok to leave off “ear”? LETTER=V, ANSWER=Vestibule of the ear. Ok to contain the word “ear”?

Confused how to apply rule. Examples: CATEGORY=Parts of Human Ear, LETTER=E, ANSWER=Eardrum. Ok to start with “ear”? LETTER=D, ANSWER=Drum. Ok to leave off “ear”? LETTER=V, ANSWER=Vestibule of the ear. Ok to contain the word “ear”?

ceann Tue, 2017-03-07 17:58
If the category is Parts of the Ear, Eardrum would be acceptable for the Letter E because eardrum is one word and not two. Same goes for earlobe. Please note if the student used the alternative spelling of either word (ear lobe, ear drum) that would be incorrect since they used a word from the category name. Vestibule of the ear (please note you would not need the words of the ear) would be OK for the letter V.

If a category requires the name of an organism to be given, should scientific or common name be used? Example: If the category was "Invasive Species", would you write Zebra Mussel or Dreissena polymorpha?

If a category requires the name of an organism to be given, should scientific or common name be used? Example: If the category was "Invasive Species", would you write Zebra Mussel or Dreissena polymorpha?

admin Mon, 2016-10-31 18:23

It depends on the category description. If it said "Invasive Species" then either the common or scientific name would be acceptable. Please note if the answer has more than one word, the first letter of the 1st word is used (rule 3.f). Rule 3.g. also allows students to get credit for only one form of a response.

If a famous person is generally known by only one name "Archimedes" or "Galileo", can students use the name?

If a famous person is generally known by only one name "Archimedes" or "Galileo", can students use the name?

admin Sun, 2016-11-06 18:52

No, per section 3.h. "If the category asks for the name of a person, both the given (first) and surname (last) of a person must be written. Archimedes' full name is Archimedes of Syracuse and Galileo's full name is Galileo Galilei.

In our answers must our terms be scientific or can we also say common known names or nicknames? Such as would you accept flu instead of influenza?

In our answers must our terms be scientific or can we also say common known names or nicknames? Such as would you accept flu instead of influenza?

admin Mon, 2016-10-31 18:14

It depends on how the category is phrased. If it does not specifically ask for scientific name then either are correct. Rule 3.g prevents students from using different forms of the same term apply. So if the letters in the grid were "f" and "i" the student would only get credit for either flu or influenza, but not both.

Rule says "The 1st letter of a word following the articles "the", or "a/an" will be considered 1st letter of the term". Does that apply to Spanish articles e.g. El Niño should be considered term for E or N. El is a Spanish article.

Rule says "The 1st letter of a word following the articles "the", or "a/an" will be considered 1st letter of the term". Does that apply to Spanish articles e.g. El Niño should be considered term for E or N. El is a Spanish article.

ceann Tue, 2017-03-07 18:01
Although "El" is a Spanish article, the term "El Nino" is used in English as a noun, specifying climatic changes. The "E" would be recognized as the correct letter to be used.

When supervisors create grids for competition, must they ensure there is a valid entry for each letter/category combination? In other words, may a grid be created where one cell doesn't have a known valid answer?

When supervisors create grids for competition, must they ensure there is a valid entry for each letter/category combination? In other words, may a grid be created where one cell doesn't have a known valid answer?

admin Mon, 2016-10-31 18:17

No, supervisors do not have to ensure there is a valid entry for each letter/category combination. Yes, a grid may be created where one cell doesn't have a known valid answer.

Write It Do It - Div B

Write It Do It - Div B

admin Tue, 2008-08-12 08:46

Are alphabetical letters allowed if within the context of the description of an object? Such as "L-shaped" and "shaped like an S"?

Are alphabetical letters allowed if within the context of the description of an object? Such as "L-shaped" and "shaped like an S"?

ceann Tue, 2017-03-07 21:17
Yes, as long as there is no clear attempt to create a drawing out of the letters that would identify the shape of the object (other than saying, "It is L-shaped", etc.).

Do arrows, greek symbols, and general shorthand count as editing, punctuation, or scientific symbols?

Do arrows, greek symbols, and general shorthand count as editing, punctuation, or scientific symbols?

ceann Sun, 2017-03-12 20:07
Commonly-understood symbols are acceptable (e.g., degree symbol; less-than; more-than; etc.). But using "shorthand" in the true sense (e.g., a set of symbols that are only understood by people who know that "language") is not acceptable.

Drawings are not allowed, but in next sentence single letters are, so just want to clarify if these phrases are considered acceptable:"Open a paperclip form an 'S' shape" or "Place two pipecleaners flat on the table so they form an 'X' shape."

Drawings are not allowed, but in next sentence single letters are, so just want to clarify if these phrases are considered acceptable:"Open a paperclip form an 'S' shape" or "Place two pipecleaners flat on the table so they form an 'X' shape."

ceann Sun, 2017-03-12 19:52
Both examples (and anything similar) are acceptable uses of individual letters.

May a writer draw a compass diagram on top of their written instructions to indicate North, South, East, West, etc. because it does not describe the model itself? North, South, etc. would be referenced in the written instructions.

May a writer draw a compass diagram on top of their written instructions to indicate North, South, East, West, etc. because it does not describe the model itself? North, South, etc. would be referenced in the written instructions.

ceann Sun, 2017-03-12 20:04
No, students may not use drawings of any kind in any part of the written instructions. North, South, East, West may be abbreviated (N, S, E, W) without penalty.

Life/Personal/Social Science

Life/Personal/Social Science

admin Tue, 2008-08-12 08:46

Microbe Mission

Microbe Mission

admin Tue, 2008-08-12 08:48

Anatomy

Anatomy

admin Tue, 2008-08-12 08:49

Disease Detectives - Div B

Disease Detectives - Div B

admin Tue, 2008-08-12 08:48

Ecology

Ecology

admin Thu, 2009-09-10 15:32

"Simpson Index" can be loosely applied to 3 different values (and calculations) depending on the author/source: Simpson's Index, Simpson's Index of Diversity and Simpson's Reciprocal Index. This should be clarified.

"Simpson Index" can be loosely applied to 3 different values (and calculations) depending on the author/source: Simpson's Index, Simpson's Index of Diversity and Simpson's Reciprocal Index. This should be clarified.

admin Thu, 2016-11-03 17:39

Students should be familiar with all three. If used for the National competition the national supervisor will specify which is being used. We have chosen to define the Simpson index, p as the proportion (n/N) of individuals of one particular species found (n) divided by the total number of individuals found (N), Σ is still the sum of the calculations, and s is the number of species. This information can be found on the files distributed at coaches clinics and will also be on the SO website once the clinics are over.

Invasive Species - Div B

Invasive Species - Div B

admin Tue, 2013-07-30 13:29

Physical Science/Chemistry

Physical Science/Chemistry

admin Tue, 2008-08-12 08:49

Chemistry

Chemistry

admin Tue, 2008-08-12 08:49

Crime Busters

Crime Busters

admin Thu, 2009-09-10 15:37

Food Science

Food Science

admin Tue, 2008-08-12 08:49

"Students will ... build a simple calorimeter to determine the energy content of a solid foodstuff." Must the foodstuff provided for calorimetry be a grain product or can it be any solid food item?

"Students will ... build a simple calorimeter to determine the energy content of a solid foodstuff." Must the foodstuff provided for calorimetry be a grain product or can it be any solid food item?

ceann Tue, 2017-03-07 18:12
It can be any solid food item per rule 3.b. However, it should be noted that the foodstuff item itself should not require refrigeration or any kind of preservation from the item "ripening" or potentially "going bad" in a certain period of time. Therefore, items which should be considered should be packaged goods with a long shelf life (ie. potato chips, cheese puffs, crackers, etc.)

Does the thermometer used for the calorimetry calculations, in its assembled position, have to fit within the 30 cm X 30 cm X 30 cm box?

Does the thermometer used for the calorimetry calculations, in its assembled position, have to fit within the 30 cm X 30 cm X 30 cm box?

ceann Sun, 2017-03-12 19:22
No.

How are the calorimeters to be graded and used for the score? Does it depend on how efficient the device or how it is set up and the correct calculation?

How are the calorimeters to be graded and used for the score? Does it depend on how efficient the device or how it is set up and the correct calculation?

ceann Tue, 2017-03-07 18:15
The calorimeters themselves are not graded. They are used to determine the caloric content of the food to be burned

Is there a formula to be used to determine the scoring of the calorimeter portion?

Is there a formula to be used to determine the scoring of the calorimeter portion?

ceann Sun, 2017-03-12 19:33
No. That is up to the event supervisor. It is 15% of the final grade. Generally, it is based on accuracy and the math involved in calculating the joules/gram of the food substance.

Part 1 is written to appear that questions can be asked relating the "...Chemistry of Food AND food grains." Does this indicate that the test should be focused on grains, but that any questions within the broad subject of Food Chemistry are within...

Part 1 is written to appear that questions can be asked relating the "...Chemistry of Food AND food grains." Does this indicate that the test should be focused on grains, but that any questions within the broad subject of Food Chemistry are within...

ceann Sun, 2017-03-12 19:45
While the grains are the focus, other questions in the area of food science are applicable. Pleas read 3.a. part 1. Also, 4. Sample activities.

What does "any seed" mean?

What does "any seed" mean?

admin Thu, 2016-11-03 17:46

Definition of seed. : a small object produced by a plant from which a new plant can grow This requires the knowledge that NO part of the fruit may be used because over time it can become rotten and students should not be exposed or working with this part in any capacity. Therefore, it is truly the smallest component from which a new plant can grow.

Would a digital thermometer be allowed? Technically, a digital thermometer wouldn't fulfill the "non-electric" requirement because of the battery, but I wonder if that's the intent of this rule.

Would a digital thermometer be allowed? Technically, a digital thermometer wouldn't fulfill the "non-electric" requirement because of the battery, but I wonder if that's the intent of this rule.

ceann Sun, 2017-03-12 19:24
The requirement is non-mercury. There is no requirement that the thermometer not be electric. The Calorimeter can not be electric. The thermometer is not a part of the calorimeter. Probes or digital thermometers are fine as long as it does not need to be 'plugged into' a 110v source.

Physics

Physics

admin Tue, 2008-08-12 08:50

Hovercraft

Hovercraft

admin Tue, 2008-08-12 08:50

Can teams use a remote control to start and/or stop their hovercraft?

Can teams use a remote control to start and/or stop their hovercraft?

admin Mon, 2016-11-07 19:17

No, as any remote control system would violate either the dimension requirements or the prohibition on integrated circuits.

Can we connect two 9V batteries in parallel? Voltage across any points will not exceed 9V as they are connected in parallel. This just gives us higher current capacity to drive two motors.

Can we connect two 9V batteries in parallel? Voltage across any points will not exceed 9V as they are connected in parallel. This just gives us higher current capacity to drive two motors.

admin Mon, 2016-11-07 19:10

Yes, this would be allowed.

Description state "MAY construct". Can students use commercial kits or models or should they be built "from scratch".

Description state "MAY construct". Can students use commercial kits or models or should they be built "from scratch".

admin Mon, 2016-11-07 19:00

Commercial kits may be used, as long as the SO building policy is followed: https://www.soinc.org/building_tools_policy

Do commercially available switches, such as dimmer switches, count as integrated circuits?

Do commercially available switches, such as dimmer switches, count as integrated circuits?

admin Mon, 2016-11-07 19:56

It depends on the specific switch. Some switches are purely mechanical (i.e. utilize a potentiometer) and are allowed. Others are digital (i.e. utilize an integrated circuit) and are not allowed.

For the definition of a "cushion of air": does the air have to have a way out of the cushion on the bottom or sides, or can it be designed similar to an air mattress?

For the definition of a "cushion of air": does the air have to have a way out of the cushion on the bottom or sides, or can it be designed similar to an air mattress?

admin Mon, 2016-11-07 20:10

Yes because it is not hovering unless air is coming out. The air must have some way of escaping (i.e. it should need to be actively replenished for the device to work, not just be a sealed inflatable chamber).

How high must the hovercraft hover?

How high must the hovercraft hover?

admin Mon, 2016-11-07 20:07

There is no set distance it must hover. If an event supervisor, from a normal observation point without having to get up and close to the hovercraft, can visually see it move down when pushed, then yes it levitates.

In Section 2, paragraph 5, sub paragraph f, the rules mention a target time and then identify it for C only. In section 3, paragraph 6, subparagraph b, the scoring says the time score gives a calculation involving a target time. Please clarify.

In Section 2, paragraph 5, sub paragraph f, the rules mention a target time and then identify it for C only. In section 3, paragraph 6, subparagraph b, the scoring says the time score gives a calculation involving a target time. Please clarify.

admin Mon, 2016-11-07 19:04

5.f. doesn't identify the target time for C only. It only mentions that the target length will be announced for Div. C only (since Div. B already knows the target length). The target time concept applies to both B and C. The reference to Div C is for the variable length that must be announced.

Integrated circuits may not be allowed, but are individual transistors allowed?

Integrated circuits may not be allowed, but are individual transistors allowed?

ceann Tue, 2017-03-07 20:40
A single transistor does NOT meet the definition of an integrated circuit and is allowed. However, most event supervisors won’t have the knowledge / ability to verify that a given small black box is a single transistor vs. an integrated circuit (for example, some voltage regulators look EXACTLY like a transistor but clearly are an IC). Competitors will be at risk to having their device DQ’d if they bring something with lots of transistors that can’t be verified in a timely manner by an unskilled supervisor.

Is a breadboard with resistors and/or transformers considered and integrated circuit?

Is a breadboard with resistors and/or transformers considered and integrated circuit?

admin Mon, 2016-11-07 19:19

No. A breadboard with discrete resistors and/or basic transformers is not an integrated circuit. Note though that some types of resistors and transformers ARE integrated circuits and hence are not allowed.

Is an Arduino an integrated circuit?

Is an Arduino an integrated circuit?

admin Mon, 2016-11-07 19:29

Yes, an Arduino contains many integrated circuits and is not legal.

Is the maximum dimensions of the skirt 19.5 x 30 cm when the hovercraft is inflated or deflated? Can the skirt be larger than those dimensions when the motor is not running?

Is the maximum dimensions of the skirt 19.5 x 30 cm when the hovercraft is inflated or deflated? Can the skirt be larger than those dimensions when the motor is not running?

admin Mon, 2016-11-07 20:25

The maximum dimension of the skirt is the same as the device, 19.5 cm wide x 30 cm long, both inflated and deflated. Students may tuck the uninflated skirt under the device prior to inflation.

Is the total voltage for the hovercraft 9V, or is 9 volts the maximum rated for each circuit? For example, may I have a separate 9V battery for each motor if they are not linked?

Is the total voltage for the hovercraft 9V, or is 9 volts the maximum rated for each circuit? For example, may I have a separate 9V battery for each motor if they are not linked?

admin Mon, 2016-11-07 19:12

Yes, multiple batteries may be used as long as they are not connected in such a way that the voltage exceeds 9 V in any circuit. Separate 9 V circuits are allowed.

Is there an interval for the target time of the competition. Ex-- between 5.0-25.0s in intervals of 1 second

Is there an interval for the target time of the competition. Ex-- between 5.0-25.0s in intervals of 1 second

admin Mon, 2016-11-07 19:53

No

Please define what the propeller shielding is (1/4 in diameter?).

Please define what the propeller shielding is (1/4 in diameter?).

admin Mon, 2016-11-07 20:28

The propeller(s) must be enclosed in such a way that there are no holes bigger than 1/4" in diameter in the enclosure. A 1/4" dowel rod must not be able to penetrate the material.

Shouldn't the denominator be "target time" instead of "run time"? Currently, if target time was 10s and run time was 4s, the time score would be TS = (1-(abs(4s -10s)/4s))x25 = (1-(6s/4s))x25 = (-0.5)x25 = -12.5 a negative number!

Shouldn't the denominator be "target time" instead of "run time"? Currently, if target time was 10s and run time was 4s, the time score would be TS = (1-(abs(4s -10s)/4s))x25 = (1-(6s/4s))x25 = (-0.5)x25 = -12.5 a negative number!

ceann Tue, 2017-03-07 20:47
The scoring formula as written is intentional. Rule 6.b. explicitly says the smallest possible TS is 0. The official Excel event scoresheet available on sonic.org automatically does this. Even if you get a TS of 0 due to the formula going negative, you still have a successful run and get a non-negative MS (note that rule 6.a. isn’t explicitly tied to the TS). The purpose here is NOT to have the fastest vehicle, but rather to have the most adjustable vehicle that can try to meet a target time. The key is that instead of thinking about it in terms of absolute TIME differences, the rules committee thought about it in terms of SPEED differences. That is, say the target time is 25 seconds. With the proposed modified formula, a team doing a run in 12.5 seconds (twice the speed) gets a time score of 12.5 points. However a team doing a run in 50 seconds (half the speed) gets a time score of 0. There is no simple formula that can perfectly balance faster vs. slower speeds, so the rules committee explicitly decided to ENCOURAGE lower speeds (both from a safety standpoint and because it’s a harder engineering challenge), so the formula as printed in the rules provides less penalty if you err on the side of a lower speed (e.g. overshooting the target time)

The 1/4" or larger dowel. Can any material be used (i.e. wood, plastic, metal), and must it be solid or can it be an optically opaque tube meeting the specified dimensions and purpose of breaking a light beam?

The 1/4" or larger dowel. Can any material be used (i.e. wood, plastic, metal), and must it be solid or can it be an optically opaque tube meeting the specified dimensions and purpose of breaking a light beam?

admin Mon, 2016-11-14 21:25

The dowel can be any material, but by definition a dowel is a solid cylindrical rod, hence a straw is not allowed.

The clarification on this rule is not entirely clear. If I found a commercially-available product containing a brushless motor attached to a fan, must it be labeled as a "cooling fan" to be legal?

The clarification on this rule is not entirely clear. If I found a commercially-available product containing a brushless motor attached to a fan, must it be labeled as a "cooling fan" to be legal?

ceann Thu, 2016-12-15 21:12
No. As long as it is a fan typically used for cooling electronics or computers it does not need to be labeled as such.

The rules say that Brushless motors and integrated circuits are not permitted, does this just refer to integrated circuits to control motors or things like adjustable voltage regulators and arduinos.

The rules say that Brushless motors and integrated circuits are not permitted, does this just refer to integrated circuits to control motors or things like adjustable voltage regulators and arduinos.

admin Mon, 2016-11-07 19:55

Note there is an official rules clarification related to this, available at: https://www.soinc.org/official_rules_clarif The integrated circuit prohibition refers to all components (including voltage regulators / arduinos) other than those specified in the rules clarification.

What constitutes an integrated circuit?(ie. are resistors, capacitors, transistors allowed? Operational Amplifiers?)

What constitutes an integrated circuit?(ie. are resistors, capacitors, transistors allowed? Operational Amplifiers?)

admin Mon, 2016-11-07 19:27

An integrated circuit is a circuit in which all or some of the circuit elements are inseparably associated and electrically interconnected so that it is considered to be indivisible for the purposes of construction and commerce. Most resistors and capacitors are not integrated circuits. Nearly all transistors and op-amps are integrated circuits.

Optics

Optics

admin Thu, 2009-09-10 15:37

Wind Power - Div B

Wind Power - Div B

admin Tue, 2008-08-12 08:51

Technology

Technology

admin Tue, 2008-08-12 08:51

Scrambler

Scrambler

admin Thu, 2009-09-10 15:38

Mission Possible

Mission Possible

admin Tue, 2008-08-12 08:51

Regarding Inclined Planes it States "Raised vertically at least 10.0 cm". Does that mean raised 90 degrees from the ground or just 10.0 cm in an upward direction along the Inclined Plane?

Regarding Inclined Planes it States "Raised vertically at least 10.0 cm". Does that mean raised 90 degrees from the ground or just 10.0 cm in an upward direction along the Inclined Plane?

admin Mon, 2016-11-07 21:05

An inclined plane must be used to raise an object at least 10.0 cm vertically. The vertical distance is measured at a 90 degree angle and must be at least 10.0 cm. The object does not have to travel at a 90 degree angle but overall must rise 10.0 cm vertically above where it started before the object initiates the next action.

States "lift an object at least 10.0 cm vertically". Does that mean it must be lifted at 90 degrees from the starting point or just moved in an upwards angle at least 10.0 cms?

States "lift an object at least 10.0 cm vertically". Does that mean it must be lifted at 90 degrees from the starting point or just moved in an upwards angle at least 10.0 cms?

admin Mon, 2016-11-07 21:03

The pulley must lift an object at least 10.0 cm. The vertical distance is measured at a 90 degree angle and must be at least 10.0 cm. The object does not have to travel at a 90 degree angle but overall must rise 10.0 cm vertically above where it started before the object initiates the next action.

Wheel & Axle: Is the 10 cm Vertical height or distance that object is pulled by wheel and axle?

Wheel & Axle: Is the 10 cm Vertical height or distance that object is pulled by wheel and axle?

admin Mon, 2016-11-07 21:07

The Wheel & Axle must lift an object at least 10.0 cm vertically. The vertical distance is measured at a 90 degree angle and must be at least 10.0 cm. The object does not have to travel at a 90 degree angle but overall must rise 10.0 cm vertically above where it started before the object initiates the next action.

Towers

Towers

admin Thu, 2009-09-10 15:38

For the load scored bonus, the tower must be clear of the 29.0 cm diameter circle. Is this during setup only or also during loading (prior to tower failure)?

For the load scored bonus, the tower must be clear of the 29.0 cm diameter circle. Is this during setup only or also during loading (prior to tower failure)?

admin Thu, 2016-12-01 22:21

The Load Scored Bonus is awarded only if the tower is outside of the 29.0 cm diameter circle through the entire testing. If the tower sags inside of the 29.0 cm circle during testing but the bucket remains off the ground and the tower is still outside the 20.0 x 20.0 cm opening on the Test Base, testing will continue until failure occurs as defined in the rules.

Wright Stuff

Wright Stuff

admin Wed, 2011-08-24 14:46

May translucent grey-appearing plastic coverings satisfy the requirement for non-transparent, non-white materials?

May translucent grey-appearing plastic coverings satisfy the requirement for non-transparent, non-white materials?

ceann Sun, 2017-03-12 20:15
Yes, as long as the material is not CLEAR and Non-white, the grey color will be acceptable on a Wright Stuff model.

Must the "length of the wing cord" be maintained for the entire width of the colored section in order to get the 10% bonus?

Must the "length of the wing cord" be maintained for the entire width of the colored section in order to get the 10% bonus?

ceann Sun, 2017-03-12 20:11
Nothing in the rules establishes that the width equals the chord length. The colored panel must completely go from the front spar to the rear spar, ie the chord. Chord does not refer to the widest point of the wing, just the distance from the front spar to the back. The colored panel just spans the width between two wing ribs as well as the chord length to earn the 10% bonus in Wright Stuff.