Stock class rules

discussion here is for stock class vehicles only.

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  • Sea Perch Size
    Posted by Dan Hicks at 2017-05-25 11:16:29
    We noticed that for the stock Sea Perch, both 1/2" and 3/4" PVC were used for vehicle construction during competition. The 1/2" PVC designs seemed to perform best at the deeper water levels. If 1/2" PVC performs better, why do the kits not come with 1/2" PVC vs 3/4"? ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE- the kits are an educational tool and utilize common and easy to find, and work with materials. The kits are stocked with 1/2" PVC pipe. Students are encouraged to try different material and configurations. This is all part of the engineering process that we are trying to foster within the SeaPerch community. Nationals is a competition that allows the use of vehicles created by this process. Are the 1/2" PVC constructed ROV's approved for competition events?
  • Posted by Gareth Bodle at 2017-04-18 09:01:49
    Can you confirm that that is $20USD. We have bought components from the both the US and China. NZD$1 is about USD$0.77. So a motor costing a US student say $4.00 it costs our boys about $5.00 if converted to $NZD so we are at a disadvantage if we price our budget in $NZD ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE- $US equivalent
  • Posted by Gareth Bodle at 2017-04-18 09:01:01
    The budget also says reasonable spare parts is not included? Does this mean spares will be inspected and assessed? We intend to bring 2 full sets of spares so if we replace something the spare has a spare and probably the spare robot. It just seems sensible to us. Is this a problem? ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE- only one vehicle can be processed thru compliance. Spares are not quanitized but are subject to inspection if utilized,
  • Posted by Gareth Bodle at 2017-03-21 09:09:36
    The stock class rules state: "The $20 limit is for cost of the materials utilized on the final competition vehicle" Can you please clarify: The final competition vehicle is all materials of the chassis/frame and all materials and components attached to it comprising the vehicle in the water. The $20 limit includes or excludes changes or modifications made to the control box outside the pool in the operators hands? ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE- the cost is the entire vehicle including controller, tether and anything else brought to the poolside.
    Posted by William Bach at 2017-03-21 09:07:38
    The rules do not discuss the cable. Our class stripped out the brown (4th unused wire) and the plastic cable coating to save weight. Any issue with that? Thanks ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE- that is alowable
  • motors
    Posted by Justin Hetwiler at 2017-01-31 17:47:08
    Are we allowed to rewind the stock motors? ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE - No.
  • Stock Class Sea Perch Frame
    Posted by Ty Adair at 2016-12-20 16:15:31
    I am a new Sea Perch mentor and one of my students asked me if CPVC or PEX pipe could be used in the frame of a stock class Sea Perch (assuming total cost of non-kit materials was less than $20.00). We have both looked in the rules and cannot find anything preventing these materials. Since Sea Perch encourages students to "think outside the box" it seems creative but I don't want my students to violate rules. ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE-- Materials not found in the standard kit can be used for any function (excluding motors.) Stock PVC pipe does not need to be utilized. The $20 limit governs the amount of materials that can be used. Unused stock materials CAN NOT be credited against the budget.
  • New motors
    Posted by Chad Goldman at 2016-12-20 16:10:45
    We don't want better motors, but replacement motors. My group ordered 35 kits this year plus your motor kits. If i need more motors, what specifications should I look for when buying motors? what is the rpm guidelines? ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE-- The required motors are listed in the rules
  • How will they know?
    Posted by Chris Hansen at 2014-03-31 17:37:48
    How will the judges know if we swap out our motors for better ones? ----------------------------------------------------------------------------------------------------------------------------------- RESPONSE-- we will know.... Each motor has numerous characteristics that can be measured. The cheat buster 2000 motor tester can identify stock motors instantly. We have crazy smart people with PhDs here at HQ.
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