fuel pod

I would say that the above two replies would do..pretty well.....simply the drag equation can be used.. u should get hold of drag coefficents values for simple shapes like cone ,hemisphere... its better to get drag co-efficent vs Reynold no. graphs....(these are attained by the use of the analysis mentioned above keeping in account a lot of factors) use the shape in front of the body...neglect the rest of body profile and friction.. get the value for reynold no. from the graph and simply put in the drag equation..to ge the drag force on the body.. by the way reynold`s no= velocity of (object/fluid) X Density of the fluid X dia / kinematic viscosity

Just got bit of an inquiry..For practical calculations for a gun with a good barell design cant we say that: momentum of exiting gases<<<momentum of bullet ???? Cause I guess most of their moment would be transferred to the bullet..

well it must have been his link cause I read the stuff sometime back didnt see someone had already posted it b4..and didnt remeber the link..

i dont understant the guys orignal question..cause as far I know u can atain a speed of gas higher than the speed of sound for that gas at that temperature... I recently took fluid mechanics course in whcih we studied basic Da-laval nozzle.. Its possible to attain a supersonic speed for the gas if the nozzle is operating a third critical condition..

u guys should check out http://www.badastronomy.com Hollywood movies,especially james bond movies are all about bad physics... u guys should have noted the following: ->the unknown attarctive focers b/w dying villans and the glass windows/shelves... ->the explosive super computers.. ->unlimited sub machine gun ammo.. ->net connection with any desired computer in all conditions... ->highly explosive cars.. a really intresting thing which I read was that...u guys must have noted that the hero usually escapes a building by jumping out of glass window in the process the window smashes...and the guy just has a few cuts...actually the the the broken pieces of glass will be so sharp that they act as tiny daggers due to thier inertia..they will wound nearly the hero to death...what do u think? its a theory I read somewhere...

hi! I am a mechanical engg student...on his summerbreak...was finding stuff to do found this real intresting froum...so any othe mechies out here? Anyway..I am making small R/c hovercraft from scratch..Any good online resource any one knows about...? fields of intrest are fluidmechanics/heat transfer/aerospace/autmobile......... just have the basic knowledge..... starting my 5th semester after the break.. + GTA-San Andreas is cool but no upto my expectaions...waiting badly for AOE3.. Over an out..

I am planning to build a R/c hovercraft starting from scratch......I will try to use total engg approach.....calculating every possible detail...I just wanted a bit help from the rookies...just lil tip about where to start from? Also if u guys know if thers some software available online to compare the theoretical calculations with... any help would be greatly appreciated...! (mech engg student here...so use of technical terminologies will be more than welcome!)

Yet another mechanical engineer (starting 3d yr) here! Hello folks.. hey wolverine....I am doing a four yr graduation course in mech engg..Id like to do masters in aerodynamics/aircraft design... Do u think it would be possible if i picked up some extra courses after the graduation? Any ways i am planning to build a proper R/c hovercraft this summer break any rookies in the field?

well I dont actually know ur level of understanding....but Mbeychok gave a very complete reply.. If u have to explain the formula using a diagram...u can expalin the flow of an incompressible fluid through an orifice..how the velocity increases and the pressure decreases as the area decreases ..and vice versa.... Also u can explain the height factor by showing flow though water tanks at different heights connected by pipes.... And the friction head depends on he type of material of the pipe or through the material the fluid is flowing... Important! Bernoulli`s eq is only applicable to incompressible fluids...