1997 ASME STUDENT DESIGN CONTEST
Catergorized Update Questions and Answers



Assembly

  1. Is it permissible to place material inside of the receiving box in order to stop the balls from bouncing?

    Yes.

  1. During assembly, is it permissible to move the balls, place part of the system and then replace the balls in their original locations?

    Yes, provided no part of the system is in contact with the balls at the start.

  2. Does the 16x16x32 cm box used to measure the system pre-assembled size have the same dimensions as the box and the platform?

    Yes.

  3. Is it OK to attach things to the board, box or platform?

    Yes. However, the "things" must be easily and completely removed within a reasonable amount of time (within a minute) after the run. Also, if significant damage (e.g., from screws or large tacks or nails) or significant residue (e.g., from glue or gummy adhesive) is evident after removal, the run will be disqualified.

  1. Is it permissible to place parts of the system underneath the platform box?

    Yes, provided the platform is placed back in its original location. The platform is open on the bottom.

  1. Can a wire be resting under the edge of the platform box at the start of operation or must all four edges of the platform box be in contact with the 4x8 board at the start of operation?

    You will not be allowed to have anything (e.g., a wire) between the platform box edges and the plywood surface. The platform box must lie completely flat and flush on the plywood. (Note - Update 1, Q&A # 10 still holds).

  1. While keeping the 32cm sides of the boxes parallel to the 4ft sides of the plywood, can the boxes be initially placed shifted toward one of the 8ft sides of the plywood or must the boxes be centered along the 4ft width?

    They can be shifted provided items 4, 5 and 8 in the Design Problem statement remain satisfied.

  1. Must consumable items such as tape and aerosol lubricant fit into the box before assembly and/or placement?

    Yes. Everything except the board, platform, box, and balls is considered to be part of your system.

  2. Must items used for assembly but not part of the device such as tools (e.g., screwdrivers) fit into the box before assembly and/or placement?

    No. Tools used to help assemble your system are not considered to be part of your system as long as they are removed from the board area when the assembly is completed.

  1. Q&A #4 in Update 1 states that it is permissible to place material inside the receiving box. Can this material extend above the top surface of the receiving box before, during, and after the transfer provided the balls are below the top surface of the box after the transfer?

    Yes.

  1. It was stated in Q&A # 4, Update 1 that a material can be placed in the destination box to stop the balls from bouncing. Does that material have to be placed in by the device or can the material be placed in by the operator prior to starting the device?

    It can be placed by you during assembly.

  2. Is the sheet of plywood being supported in such a manner that a C-clamp can be attached to the edge across the 3/4 " dimension?

    No. See item 2 in the problem statement. Also see Q&A #28.

  1. Is it permissible to draw position lines and marks with a pencil on the 4x8 board to achieve an exact system setup?

    No.

  2. Is it permissible to slide thin sheet metal under the edges of the 4x8 board?

    No.

  3. Is it permissible to hammer nails or to screw screws into the outer vertical edges (the 3/4in x 4ft and 3/4in x 8ft sides) of the 4x8 board, even though they will leave small holes after being removed?

    No. See Q&A # 7, Update 1.

  1. Are "practice runs" permitted within the 5 minute set up time? If so, can the practice run be "powered" by a different battery from that being used for the actual run.

    There is nothing to prohibit "practice runs" during the allotted assembly time. ASME will only provide a single fresh battery for each official run. You may use your own batteries for the "practice runs."


Batteries

  1. Will the batteries be provided by ASME?

    Yes.

  1. Will contestants be allowed to test and select their own batteries from the ASME-provided set?

    No. Fresh batteries will be provided and distributed at random. Because battery quality control is not perfect, batteries vary from one batch to the next and even within a batch. Your design must be robust enough to deal with this.

  1. Do we get a fresh battery for each trial?

    Yes.


General

  1. Can you just pick the balls up and throw them, or must they be in contact with your design until they are transported across distance d?

    Your system is allowed to pick them up and throw them.

  1. Will the contest be held indoors or outdoors?

    The contest will be held in typical indoor conditions.

  1. How will "damage" be determined?

    After transport, the balls should not differ significantly in appearance or in function (bounciness). For example, the golf ball should not have any significant scratches, and the ping-pong balls should not have any dents or cracks.

  1. Is it legal to have something adhering to the balls when they are put into the box? (I'm talking about some type of glue or sticky tape that would remain on them).

    No.

  1. Are the surfaces of the platform, box, or plywood base painted?

    No. All surfaces are untreated.

  1. Does the 4x8 board lie on the floor in the competition room?

    Yes.

  2. What is the minimum height of the competition room?

    Typical indoor ceiling height (at least 8 ft).

  3. How many people can be used to assemble the system?

    A maximum of four.

  1. Item 5 under "Conducting a Trial" in the "Contest Guidelines" states that a one to two minute presentation must be given before running the device. Is this optional or required?

    Required.


Motor

  1. Does the motor have to stop, and will the time at which the motor stops (if it does) affect our score?

    No. The transport time used in the scoring refers only to the time interval between the post-assembly start signal and the instant when the balls come to rest.

  1. Can the motor be modified internally?

    No.


Platform and Box

  1. Can the box and/or platform move during the "transport"?

    Yes.

  2. Given the previous Q&A, will the distance d be determined by the original distance between the box and platform?

    Yes.

  1. Does the destination box have to stay upright throughout the run?

    Yes.


Scoring

  1. Does the motor have to stop, and will the time at which the motor stops (if it does) affect our score?

    No. The transport time used in the scoring refers only to the time interval between the post-assembly start signal and the instant when the balls come to rest.

  1. Can the box and/or platform move during the "transport"?

    Yes.

  2. Given the previous Q&A, will the distance d be determined by the original distance between the box and platform?

    Yes.

  1. Our system transports the balls to the box in a container. Is it OK if this container is vibrating within the box after the transport?

    The time stops "when the balls come to rest." If the balls are still vibrating, they have not "come to rest." The transfer time stops when the balls stop moving completely.


Sources of Energy

  1. Must the energy storage devices be returned to their starting state by the end of the transport time or can they complete their reset following the end of the transport time?

    The run is over when the transport is completed (i.e., when the balls come to rest in the box). No post-transport energy storage reset time will be allowed.

  2. Must all masses in the system return to their starting energy state (elevation) independent of whether their converted potential energy is used in transporting the balls? In other words, is the mass of every system component considered a potential energy device independent of function?

    The mass of every system component will not be considered a potential energy storage device independent of function. However, if potential energy of any system component is used to supply power to the transport process (e.g., using a large mass falling over a distance to provide energy to a delivery mechanism) the run will be disqualified. If, on the other hand, some side effect in your system causes the CG of a component to be lower at the end of the transport but the change in potential energy was obviously not used to power the transport process, (e.g., a piece of your system falls onto the board or onto a tripping mechanism without imparting significant energy to the system or to the transport process), then the attempt will not be disqualified.

  3. Is the potential energy referring to the entire device or to each individual element of the device? For example, if there were two identical springs (A and B), A being initially compressed and B at natural length, could the run end with B compressed and A at natural length?

    The energy storage requirements apply to each system component individually. Therefore, the answer to the 2nd question is NO.

  1. Can a remote control device, powered by a separate battery, be used to start the system?

    No. A remote control device will be considered to be part of the system, and the system can be powered only by the single AA battery.

  1. If a ramp is used to transport the balls by which the heavier end is supported by some vertical support, then the motor is used to remove the support causing the ramp to pivot and thus lifting the balls to travel down the ramp, does this violate the potential energy rule?

    Yes. See Q&A #'s 16, 17 and 18, Update 2.

  2. If the ramp in Q&A # 38 is returned to its original position before the balls come to rest, is the run valid?

    Yes.

  3. Can the kinetic energy generated from the ramp in Q&A # 38 be used to power another device?

    Yes, provided Q&A # 39 holds.

  1. Can permanent magnets be used in the system?

    It depends on how they are being used. If there is a significant net change in magnetic potential energy (for any individual magnet), the design will be disqualified. See item 4 in the problem statement and Q&A #'s 16, 17 and 18, Update 2.

  2. Answer # 17 states that "if potential energy of any system component is used to supply power to the transport process ... the run will be disqualified." Does that apply even if the potential energy of the component after the run is greater than or equal to the energy before the run?

    No. A run will be disqualified only if there is a net loss of potential energy of a system component, and if the lost potential energy was used to power the transport process.

  1. Can a compressed gas be used to impart energy to the system or balls even though the gas is at a higher energy state after being released?

    No. All net energy used in the transport process must come from the battery.


System Configuration

  1. Is it OK if the balls are supported by part of the system within the destination box after the transport, even if the balls are not in contact with the box walls?

    Yes, provided the balls are below the top surface of the box.

  1. Q&A # 4, Update 1 states that it is permissible to place material inside of the receiving box. Does this material have to be removed from the box when the balls are placed in it?

    No. See Q&A # 8, Update 1. Everything but the balls, platform and box are considered to be part of your "system."

  1. Does the system have to reset itself to its starting configuration after the transfer?

    No.

  1. Q&A #4 in Update 1 states that it is permissible to place material inside the receiving box. Can this material extend above the top surface of the receiving box before, during, and after the transfer provided the balls are below the top surface of the box after the transfer?

    Yes.

  1. May any part of my system hang over the edge of the 4' x 8' board or must the entire system be contained inside of these boundaries?

    Parts of your system may hang over provided they are not in contact with anything off the board. See Item # 4, problem statement.