by ZOMBIE USER 866 on Sat Mar 03, 2001 5:39 am
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Cannonshop:
<B> Well... Probably. Being as you are in the People's Republic of California, I expect you won't get much opportunity down there to find out (California is BIG on Gun control...),</B><HR></BLOCKQUOTE><P>I might. I have nothing against registering my personal weapon. There's a shooting range and club about 7 miles from where I live, too. I'd <i>love</i> to go over there, sometime. I just don't have the time or the spare cash, at the moment.<P>
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR><B>on another subject entirely: maybe you should check out the EAA fly-in happening up here in August, (Arlington Airport is 15 min. from here by Freeway)It's a pretty major event, and there's always some very strange looking craft lined up. Kind of a "General Aviation" Airshow, (might serve as an excuse to get current in your ratings...). </B><HR></BLOCKQUOTE><P>Sigh...I haven't been to an airshow/gathering in a long time. Maybe by August, it will be feasible for me. I'd love to go, though.<P> <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR><B>As for the Rotorcraft notes: Helicopters have a speed limit, it's imposed by engineering. goes something like this: a chopper moving faster than about 250mph loses lift on one side. Flip, Crash, boom. Why? because the craft is moving faster than the leading edge of the Rotor is on the backstroke, which stalls the airflow over the rotor's airfoil surface, thus, eliminating lift... Hence, the Marines went to the V-22 Crashmaster(oops, Osprey...). same effect's not as bad with birds like the CH-47 and CH-46 series, but, it's still present. It's about equivalent to losing a whole wing on a Fixed-wing bird. Speaking of Fixed wings: the Drag Coefficient on that shuttle's gotta be a bitch on re-entry... do the wings swing in, ala F-111? if so, how do the Hinge-points fair against superheated wind? Do they use a "Shaped" forcefield instead, (ala Star Trek), with the wings for use only in low-speed manuevering?</B><HR></BLOCKQUOTE><P>
Before I get into the explanation of how the Dart handles atmospheric entry, I need to admit that my drawings have strayed a bit from my original design. Have you noticed how the wings keep getting longer and more narrow, each time I've drawn the Dart?!? I don't know why that happens. Maybe I've got some kind of genetic predisposition toward drawing wafer wings. But the original design had stubbier wings, with the delta taper much more pronounced than it ended up on the Bristol paper. I have no clue why I strayed from that. Maybe it's just that I draw as fast as possible, in an effort to meet my self-imposed deadlines. I've caught myself in little continuity problems because of that, before.<P>Anyway, on to the fun stuff. This is how I had it worked out, in my head: The Dart doesn't enter the atmosphere nose-first. Before it begins its true descent, the vertical stabilizer collapses and retracts into the body of the plane, and its little hatch seals like the side doors. The onboard computer takes over flight control and rolls the craft inverted, with the nose elevated by around 40 degrees. Since the wings are tapered downward, the inverted position presents a relatively smooth, curved surface to better deflect the heat and help to slow the rate of descent. <P>The Dart is steered with the jets (both the rear and the underside nozzles) during the entry stage. As it descends into the atmosphere, the computer executes a number of steep banks (80-85 degrees), until the speed drops below Mach 1. At that point, they're probably at an altitude of around 50-60,000 ft. The computer rolls the craft back to regular flight position; the tailfin re-emerges, and the pilot resumes manual control.<P>The Stingray, however, has swing wings, and uses a heat shield on the hinge points. It enters the atmosphere under power, and uses reverse thrust to help control rate of descent.<P>Thanks for the 'copter info, Dan san. I'll have to get around to spending some more time learning about them. I tend to forget about them, until I see one that impresses me (as they all do, if I see them in real life).<P>(^-^)<P>Kaichi