The primary author seems to have some pretty impressive scientific credentials (if Wikipedia is to be trusted).
Anyone know anything about this?
* Factual errors: Before re-entry, Haise was reading voltage and amperage of the batteries. On two of the batteries there is no voltage, but he says there is some amount of amperage. Amperage cannot be present without some amount of voltage.
Here are a few (not really what you're looking for, but errors nonetheless), but there are a few things that could be qualified as physics goofs.
Apollo 13 (1995)
* Incorrectly regarded as goofs: The film contains an explicit notice that...
What would happen if you could travel at such a speed (faster than the escape velocity) as to have a stable orbit of a black hole just beyond the event horizon and you were to stick your hand inside the boundary?
Would you be sucked in?
Would your hand be taken but your velocity keeps you...
Unfortunately, in this case, that is analagous to saying to find another way to design a Hoberman Sphere. :biggrin:
The gears are primary to what this invention is all about.
Luckily I am onto a lead through a friend of a friend who has some rather sophisticated gear design software...
Unfortunately that is the part I don't know how to do.
I have some postings up on other forums. Hopefully something will pan out. I found a gear designer who will do the design ($$$$). Ouch! Especially considering that I am doing this on my personal time and with my own money.
Here are a couple of drawings that will better describe the geometrical relationship of the two gears....
http://www.gsg.microminutes.com/images/gear 1 of 2.jpg
http://www.gsg.microminutes.com/images/gear 2 of 2.jpg
The angular dimension on the first drawing is 48 degrees...
I was able to download a gear designer LSP for AutoCAD which allowed me to do what you mentioned; designing a custom angle bevel with a straight spline. But that still leaves me with only meeting the 48 degree requirement. I still have the 12 degree requirement to meet as well...
I got hold of a copy of Machinery's Handbook which has a whole section on gears. After reading up a bit on gears, here is perhaps a better description of the gear set I am trying to come up with a design for.
Two identical mating helix gears which have a bevel angle 48 of degrees and a...
I am looking for some help designing a gear for an invention of mine. I know gear design basics, but this is a little beyond what I know. Any help would be greatly appreciated.
The needed gear (to be made from plastic) is part of a toy and will be under very little stress. For my...
You have a bomb which will detonate if the input sample on its trigger is of a certain mass (we'll call this the critical mass).
The trigger input sample has a mass equal to 99.99% of the critical mass.
A person takes this device on spaceship which begins to accellerate...
If the train stops suddenly, the train will be compressed. To start moving the engine must just get the first car moving who's momentum helps get the second car get moving and so on...
If the train stops slowly, the train will be at maximum extension. To start moving forward, the engine...
The engines were Diesel Electrics and when the one train stopped it did so with the electric drive engine on a dead spot on the forward direction winding on the motor armature. Backing up moved the armature off the dead spot eneabling it to stop and then continue in the forward direction...
I need to plug some equations into Excel.
I am using the Insert-->Name-->Define feature to assign a given cell to a defined named variable.
Example... cell a1 = X, cell b1 =y
this way I can say cell c1 = X*Y rather than having to say c1=a1*b1
Here's the problem...
I need to...
Here's a tip on building your bridge... I did this back in highschool...
1. The joints are going to be the weak link.
2. Overlapping joints will be stronger than butt joints.
3. maximize the number of overlapping joints.
4. Since there are no restrictions on how you cut your balsa...
It is a concentrated load at the end.
The beam doesn't have to be of a constant cross section, however there is nothing to be gained (except extra fabrication costs) by tapering it as the arm increases.
I'll set up the spreadsheet and start plugging in numbers.
I am working on a project where I have an I-Beam supporting a cantilevered load.
For ease of fabrication, I need change the cross section of this I-beam.
Supposedly the now famous original Hubble Deep Field covered an area of sky equivalent to the size of a grain of sand held at arms distance. How small an area does this new Ultra Deep Field photo cover?