Monthly Archives: October 2011

Well, here I am whining about absolute value again. As you recall from a recent post, I don’t like having to use an “if-then” clause to define absolute value. At first I thought I’d avoid mentioning complex numbers because it … Continue reading →

We suggested in the previous post that our unheli concepts might be more or less successful depending upon our design choices.  Here’s an example. Assuming the direct downward air thrusting or sideways air thrusting would be competitive in efficiency to … Continue reading →

The previous post looked at the feasibility of rotorless helicopter-like vehicles. But we should also ask, what may make them infeasible? Though there may not be show stoppers, there must be some disadvantages, which should be examined in case any … Continue reading →

We’ve looked at compressed air in previous posts as a method for eliminating rotors in helis.  Here we’ll take a general look at compressed air for flying and show that it should be possible to build helicopter-like vehicles (“unhelis”) fueled … Continue reading →

Those of you who have examined my recent compressed air unheli posts know that I’ve looked at approaches including direct downward air thrust and lateral air thrust against a lampshade wing. But here’s still another method, which may be much … Continue reading →

At the risk of sending my readers into hysterical fits of laughter, I must come clean and confess that I am “uncomfortable” with the usual definition for the absolute value of a number a.  This is because a branched “if-then” … Continue reading →

Ah, some of us have observed that our educational systems are not perfect.  What to do? I think it’s likely that all humans are born with a deep and powerful love of learning.  It may be part of our ancient … Continue reading →