Tom22 Posted December 14, 2014 Report Share Posted December 14, 2014 (edited) A helicopter takes 3 hours to fly from Fairview to Ashland and 2 and 1/3 hours to return from Ashland to Fairview. If the wind velocity is 15 knots from the west on both trips what is the airspeed of the helicopter? Ashland is west of Fairview. Edited December 14, 2014 by Tom22 Quote Link to comment Share on other sites More sharing options...
Azhigher Posted December 15, 2014 Report Share Posted December 15, 2014 Do your own homework, Tom. 5 Quote Link to comment Share on other sites More sharing options...
Tom22 Posted December 15, 2014 Author Report Share Posted December 15, 2014 Azhigher, you’re no fun – LOL! Quote Link to comment Share on other sites More sharing options...
terminal_velo Posted December 15, 2014 Report Share Posted December 15, 2014 Not an appropriate response, Azhigher. Rather than giving him no answer, give him a wrong one. Quote Link to comment Share on other sites More sharing options...
rotormandan Posted December 15, 2014 Report Share Posted December 15, 2014 The answer is always 42. For life, the universe, and everything, and Tom's questions too. 2 Quote Link to comment Share on other sites More sharing options...
Tom22 Posted December 15, 2014 Author Report Share Posted December 15, 2014 Think distance equals rate times time. D = R(T) Quote Link to comment Share on other sites More sharing options...
adam32 Posted December 15, 2014 Report Share Posted December 15, 2014 What kind of helicopter? Piston or turbine? Semi rigid, rigid, full articulated? How much fuel on board? Male or female pilot? When was it's last annual and 100 hour? Time left on the main rotor blades? Quote Link to comment Share on other sites More sharing options...
CharyouTree Posted December 15, 2014 Report Share Posted December 15, 2014 Think distance equals rate times time. D = R(T) As you don't actually provide a D, this isn't really a Nav skills problem, but a math problem, solving for multiple variables. Quote Link to comment Share on other sites More sharing options...
Tom22 Posted December 15, 2014 Author Report Share Posted December 15, 2014 Well, although it is not explicitly stated, distance is in the problem. Quote Link to comment Share on other sites More sharing options...
Tom22 Posted December 15, 2014 Author Report Share Posted December 15, 2014 Airspeed = 120 knots. Thanks for playing along. Quote Link to comment Share on other sites More sharing options...
WolftalonID Posted December 16, 2014 Report Share Posted December 16, 2014 No it was 42!!! Quote Link to comment Share on other sites More sharing options...
Eric Hunt Posted December 16, 2014 Report Share Posted December 16, 2014 Makes about as much sense as this question: "If it takes a yard and a half of calico to weave an elephant's underpants, how long will it take a double-breasted cockroach to tap-dance through a barrel of treacle?" Quote Link to comment Share on other sites More sharing options...
d10 Posted December 16, 2014 Report Share Posted December 16, 2014 It makes sense as a math problem. You don't even really need to know distance since you know both legs are the same. You can set the rate * time part of the distance formula for both legs equal to each other and solve for rate. 2 1/3(k+15)=3(k-15)7/9(k+15)=k-157k/9+105/9=k-15240/9=2k/9k=120 This doesn't have much applicability as a helicopter pilot problem since you usually know rate and you want to know time, so maybe this wasn't the best forum for it, but claiming it makes no sense or that it's unsolvable isn't a good look when it's just a basic algebra problem. There are lots of opportunities to use algebra and even more advanced math to improve your decision making as a pilot, so I do think it's useful to know this stuff. 1 Quote Link to comment Share on other sites More sharing options...
akscott60 Posted December 16, 2014 Report Share Posted December 16, 2014 I let the aircraft tell me. Quote Link to comment Share on other sites More sharing options...
Flying Pig Posted December 16, 2014 Report Share Posted December 16, 2014 This discussion pains my soul Quote Link to comment Share on other sites More sharing options...
Gomer Pylot Posted December 16, 2014 Report Share Posted December 16, 2014 Helicopter pilots tend to be practical. An airspeed indicator is required to be installed and operational before a flight can begin, so a problem requiring solving for airspeed isn't something they tend to care about. Find something with more applicability to actual helicopter flying and you'll probably have more luck. Quote Link to comment Share on other sites More sharing options...
zippiesdrainage Posted December 16, 2014 Report Share Posted December 16, 2014 (edited) Come on guys, obviously the helicopter suffered a bird strike on it's way to Fairview causing the plexi-glass windshield to break, making the aircraft less aerodynamic, increasing the drag and flying at a slower pace than the ASI is showing. The pilot has the screen replaced while he hits on the waitress in the airport restaurant and the helicopter is more aerodynamic on the way back, suffers less drag and makes better time. It's so simple, why over complicate things? -Or- Blame the copilot for screwing up the flight plan. Edited December 16, 2014 by zippiesdrainage Quote Link to comment Share on other sites More sharing options...
Astro Posted December 17, 2014 Report Share Posted December 17, 2014 Find something with more applicability to actual helicopter flying and you'll probably have more luck.A Robbie and a Schwiezer are at 800 feet. Deciding to race they both chop the throttle. Who's auto will reach the ground first? Quote Link to comment Share on other sites More sharing options...
Lindsey Posted December 17, 2014 Report Share Posted December 17, 2014 It makes sense as a math problem. You don't even really need to know distance since you know both legs are the same. You can set the rate * time part of the distance formula for both legs equal to each other and solve for rate. 2 1/3(k+15)=3(k-15)7/9(k+15)=k-157k/9+105/9=k-15240/9=2k/9k=120 This doesn't have much applicability as a helicopter pilot problem since you usually know rate and you want to know time, so maybe this wasn't the best forum for it, but claiming it makes no sense or that it's unsolvable isn't a good look when it's just a basic algebra problem. There are lots of opportunities to use algebra and even more advanced math to improve your decision making as a pilot, so I do think it's useful to know this stuff.You can do math??? Quote Link to comment Share on other sites More sharing options...
arotrhd Posted December 17, 2014 Report Share Posted December 17, 2014 C'mon folks...it's about HELICOPTERS and some other things that were posed to intentionally throw you off.This really is not a nav or math problem, IT'S A MONEY PROBLEM; therefore, a solution is unlikely. -WATCH FOR THE PATTERNS, WATCH FOR THE WIRES- Quote Link to comment Share on other sites More sharing options...
SBuzzkill Posted December 20, 2014 Report Share Posted December 20, 2014 The gravity drive folds space to make point A and point B exist in the same place. The helicopter then passes through to the other side and space returns to normal. So my answer is ~10 knots. 1 Quote Link to comment Share on other sites More sharing options...
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