424 reputation
519
bio website ericmenze.com
location Minneapolis, MN
age 29
visits member for 2 years, 8 months
seen 9 hours ago

I'm a Computer (Web) Programmer/Analyst based in Anchorage, AK and Minneapolis, MN. I use (among other things) ASP.NET, C# and SQL Server.

I build things. Bicycles, computers, websites, guitars, cars, motorcycles, sound sytems... lots of things.


Mar
20
comment How to calculate the velocity needed for a rocket to get to a L1 point (escape a body without orbiting)?
Wouldn't launching off-normal (straight up) 'add velocity' at the expense of some altitude? What angle would maximize altitude from Earth's surface?
Mar
20
comment Would it be economical to add a counterweight to rocket launches?
Example: Take a fully loaded Saturn V rocket at 2,800,000kg, and add a counterweight that will reduce its effective weight for the first 10 seconds to 400,000kg and detach. It burns 2,100,000kg of fuel in the first stage in 161s, so 13,000kg/s of fuel is lost. Without the counterweight, the first 10 seconds would net a $\Delta v = 4,440m/s*\ln(2,800,000/2,670,000) = 211m/s$. With the counterweight: $\Delta v = 4,440m/s*\ln(400,000/270,000) = 1745 m/s$, or roughly Mach 5.1.
Mar
19
comment Would it be economical to add a counterweight to rocket launches?
I should add that I wasn't counting on the acceleration from the counterweights to be of much importance in and of themselves; the 63 m/s velocity difference would pale in comparison (I think) to how fast the onboard rocket engines could accelerate the lessened (or non-zero) effective mass. Is there a way to calculate this?
Mar
19
asked How to calculate the velocity needed for a rocket to get to a L1 point (escape a body without orbiting)?
Mar
19
answered Rocket propelled by a giant monochromatic laser
Jan
28
comment Could the Heisenberg Uncertainty Principle turn out to be false?
The Heisenberg Uncertainty Principle is an unfalsifiable claim? All of (good) science is falsifiable. See the first paragraph: en.wikipedia.org/wiki/Falsifiability
Jan
13
awarded  Popular Question
Dec
15
awarded  Popular Question
Dec
8
awarded  Notable Question
Oct
28
awarded  Nice Question
Jun
25
accepted Could we make a trebuchet that could launch objects to a stable orbit?
Jun
25
comment Would it be economical to add a counterweight to rocket launches?
How about four steel cables, each holding 100 tons? Some bridge reinforcement cables are rated for more than this.
Jun
25
comment Would it be economical to add a counterweight to rocket launches?
Further, I do refer to wikipedia. Since you seem to be of the opinion that this has been answered therein, could you provide a wikipedia link that properly addresses this question?
Jun
25
comment Would it be economical to add a counterweight to rocket launches?
I'm aware the total energy would be the same, but lifting the counterweights could be powered by renewable resources like wind and solar, reduce the amount of fuel carried to start acceleration and thus lowering the weight and thus further reducing fuel (the Tsiolkovsky rocket equation), and could perhaps be economical across multiple launches.
Jun
25
accepted Are there any other mechanisms that can make virtual particles 'real' other than Hawking Radiation and Universe Births?
Jun
25
accepted What is the general formula for a trebuchet?
Jun
25
accepted What is the most efficient machine for translating gravitational potential energy of one mass into kinetic energy of a different mass?
Jun
25
accepted Lever Mechanics - How to formulate an ideal lever launch
Jun
25
accepted Would it be possible to have an electron-less solid?
Jun
25
comment Are there any other mechanisms that can make virtual particles 'real' other than Hawking Radiation and Universe Births?
In the case where pair formation happens within the event horizon and the escaping particle 'tunnels' out, then I can perhaps see some energy theft as it leaves the event horizon (though how it does so, I do not understand). However, pair formation could take place outside of the event horizon, in which case how does a particle not in the event horizon leaving take energy away from the black hole?