jajefan wrote:nicholasmaurer wrote:RestingDoll wrote:
The issue is that nothing in the problem indicates that Poiseuille Equation should be applied (viscosity, laminar flow, etc).
I think that is a fair criticism. The ES agreed he should have given more information to indicate the Poiseuille equation was needed. I think his assumption was that most pipes meet the requirements of using Poiseuille: they are reasonably long and not so wide as to generate turbulent flow.
I know this isn't the place to get clarifications, but are the tests allowed to test content not specifically listed in the rules manual? My concern arises from the fact that under rule 4. b. iv. Fluid Mechanics (Div C), Puiseuille's equation is not listed as a topic. It would be good to know for future competitions, as my team did not prepare adequately for topics outside of those listed for the invitational.
kinghong1970 wrote:search amazon for mini tamiya connector male
or cut the connector and solder
https://www.amazon.com/s/ref=nb_sb_noss ... ector+male
Jake R wrote:I know that you need a high static pressure for lift fans, but does cfm matter for list as well? for example, i found this one that i might use https://www.digikey.com/product-detail/ ... ND/5230580 is that a good choice for lift? (max load)
LittyWap wrote:Hey all,
I was wondering if anyone had any fluid mechanics/Div C practice tests. I was less than satisfied with mine and my partner’s performance at a recent tournament despite having the best build score, (16.89s, 16 rolls). Does anyone have any tests from fargone tournaments; your Physics II homework, anything at all?! I need to really power wash the cobwebs out of my brain.
Does anyone know how long on average it takes for a SOINC.org FAQ to be answered?
geniusjohn5 wrote:What affects the effectiveness of a fan more? Amperage or Voltage? I'm deciding between a 1600 mah 8.4 nimh battery and a 3000 mah 8.4 nimh battery.
rc2000 wrote:Would anyone mind recommending me some DC motors & props for lift. I've really been struggling with it. For thrust I plan on using a computer fan.
Also: Im using 2 of these https://www.amazon.com/1600mAh-Battery- ... +volt+nimh to power my hovercraft. Any tips on connecting them?
geniusjohn5 wrote:Can anybody provide a link for connectors? I'm trying to find a way to connect the 8.4 v NiMH battery pack to the rest of my circuit.
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