HP48

Duct Sizing Program
I've recently graduated with a BS in Mechanical Engineering. As it turns out, my first job out of school is designing HVAC systems. All of the designers run around with these cardboard "ductilators" that are used for sizing duct based on volume flow rate and either velocity or pressure loss. I apparently have a... 15 Feb 2006 23:19

Wonderfull 41, 42, 71B emulators
The answer to the ultimate question 42 can still be yours provided you have HP 48GX, 49G, or 49g+ There is this wonderful emulation by HrastProgrammer which emulates 71B or 42S or 41B [super-version for the 49G will have extra memory & ROM] It's cheap and it simply works! http://hrastprogrammer.tripod.com/ ... 6 Feb 2006 16:46

Easydrill
Has anyone seen any other program compared to easydrill. for the HPg49+. It is a drilling and surveying program developed by directional drillers. ... 1 Feb 2006 16:09

ROT ROT - oh GROB!
I've found that drawing stack diagrams is essential to understanding what's going on in RPL, particularly in complicated code. It's one of the weaknesses of the language in my opinion. Names work a lot better for keeping track of values. It has something to do with the fact that when human beings use "language," it... 27 Jan 2006 12:55

interesting math problem
Hello, I was at a math conference last week and I did not have much to do, my chance was that a nasa Booth was nearby and that I was readin some nice SF... so I started wandering, provided that one could create a 100% efficient propulsion system that would transform mass into it's equivalent energy and us... 28 Jan 2006 17:12

Directional Drilling software
I am looking for directional drilling software for the hp49g+ I used to have the 42s which does not transfer over ... 24 Jan 2006 18:29

REQ: HP 48SX manuals
Does any one have the HP 48SX user manuals they can post? Iseemed to have lost mine and can't for the life of me remember how to use this calculator. Thanks!! ... 24 Jan 2006 18:29

how to solve integrals
Hi, i have this problem... I have to solve an integral between -inf and +inf but the calc doesn't solv it... it gives me some sum of naturals logaritms. How can i solve it? the integral i have to solv is this: integral form -inf to +inf of (10^(-12))/(1+(2*?*5*(10^(-7))*x)^2) in dx u can see it in graphi... 23 Jan 2006 14:47

Want a PI function?
In this post we will illustrate a \PI (product) function, written in UserRPL with a little help from library 256. When implementing any user-defined function of symbolic arguments, a serious problem is that the arguments of user-defined functions are not normally quoted, hence they will be evaluated if possible, ... 22 Jan 2006 06:57

HP28S (ROM)
Hello, I've been using an HP28S for several years and I've heard there is an emulator for windows. I've also been told that I need the ROM image for using the emulator. Is it possible to download the HP-28S rom image from somewhere? Or do I have to extract it from my real calculator? I have a laptop with an... 17 Jan 2006 16:22