[[bug]Jet Engines Broken Drag Model]

That's amusing to make a nosecone out of it. Not something I would think of! Have you tried a Juno nosecone?

 

But I'd think that the answer is that when an engine is in it's proper location, that it is completely out of the airstream. So you either need a clever and complex airflow model that calculates the microenvironment around the part and has reasonable drag values -- or you program it up using the same airflow for all the parts and then put really low drag values on things that sit at the back end of the jet/rocket. And KSP currently does the 2nd.

 

["Prop. Requirement Met" bug?]

Win V7 64bit, running 32bit steam version of KSP v1.0.5.1028

 

I did this once and saw a problem with my Wheesley engine, so I duplicated the flight and got the same result.

OK, I'm flying toward the north ice cap, heading 30 degrees from KSC, at 5000 meters altitude, 240m/s. I'm 32:29 into the flight, and my Prop. Requirment Met is reading 97% and everything is good. One second later, my Prop Requirement Met drops in half to about 45%, my thrust falls in half, and my plane starts to fall out of the sky. The Prop Requirement Met value keeps falling and falling even as I scrub altitude, because I cannot maintain any airspeed. Eventually the plane ends up on the ground in some adjustable number of pieces.  If I fly it down, then a couple minutes later, at 0 altitude and about 130m/s, the Prop Requirement Met value is down to about 18% as I recall. WTF? I have a screenshot at 32:33, but the system won't let me upload it.

 

Edit: After a little more testing, the bug is in the fuel flow system from this particular aircraft design. The program is effectively giving me an infinite amount of fuel -- it "knows" that there are still 800 units of fuel left in the two front tanks, and it is somehow still drawing fuel at a max rate of .04/s (which is not enough to keep my plane airborne), but it is not subtracting any of that fuel flow from those tanks. So they are sitting there stuck at 400 units each. My plane partially runs out of power when the back 4 tanks get depleted of liquid fuel.

I admit the design is funky. It's built to take a pilot and scientist halfway around the planet, taking lots of science samples along the way, then climb to 19000 meters 3 times with enough control that I can still land it one last time afterward. The fuselage of my plane (from front to back) is: small circular intake, MK1 command pod, MK1 liquid fuel fuselage, MK1 inline cockpit, MK1 liquid fuel fuselage, Science Jr., then 4 FL-T200 tanks, then a Wheesley, with a Thud strapped below the Wheesley. I suspect something about that order is blocking the fuel.