Cars & Transportation: Aircraft: “Question: Can an aircraft reaching mach 2 on an afterburning (wet) 120kn turbojet do the same with a non afterburning (dry) 120kn turbofan?” plus 5 more |
- Question: Can an aircraft reaching mach 2 on an afterburning (wet) 120kn turbojet do the same with a non afterburning (dry) 120kn turbofan?
- Question: West coast bases USA ATC how busy are they all, Washington California Idaho Nevada?
- Question: How do I learn how to wire avionics online?
- Question: Is it safer to fly at night?
- Question: Hello pilots have you ever flown through the Bermuda Triangle?
- Question: Do they have any other pilot rest area on freighter planes other than the 747 freighter?
| Posted: 08 Sep 2015 12:46 AM PDT No - the flow velocity of a turbofan is too low. A jet plane can not fly faster than the rearward velocity of the gases leaving it's engine. It's back to Newton's laws of motion Force=mass x acceleration. The two engines produce that 120kn using different approaches. For a turbo fan, the mass is much larger, so the acceleration can be lower. If you are feeding 4 times the mass of air through the engine, you only have 1/4 the acceleration. The rated thrust of a jet engine is it's STATIC thrust, the faster the plane flies the lower the actual thrust it can produce. Let say that flow leaves the turbofan at 300m/s (a little more that 1000km/h) When the engine is stationary, all of the air entering the engine is accelerated from 0 m/s to 300 ms. If the plane is moving forward at 200 m/s, that flow starts with a realative velocity of 200/ms, and is accelerate to 300 m/s - a net acceleration of 100 m/s. With only a third of the acceleration, you only get a third of the thrust. To fly at mach 2, the engine exhaust must be leaving the engine at a speed greater than mach 2 (that's why there are often shock patterns in flow out of an afterburning engine) , and no turbofan creates velocities that high  |
| Question: West coast bases USA ATC how busy are they all, Washington California Idaho Nevada? Posted: 07 Sep 2015 10:07 PM PDT Report AbuseAdditional DetailsIf you believe your intellectual property has been infringed and would like to file a complaint, please see our Copyright/IP Policy Report Abuse Cancel Report AbuseAdditional DetailsIf you believe your intellectual property has been infringed and would like to file a complaint, please see our Copyright/IP Policy Report Abuse Cancel Report AbuseAdditional DetailsIf you believe your intellectual property has been infringed and would like to file a complaint, please see our Copyright/IP Policy Report Abuse Cancel  |
| Question: How do I learn how to wire avionics online? Posted: 07 Sep 2015 08:04 PM PDT I'm looking for good books or a quality online program that's going to teach avionics. I learned about basic wiring and doing splices in A&P school, but pretty much nothing about wiring radios, glass cockpits, or wiring a panel. I'm interested in GA and experimental aviation and this seems to be the least covered topic in terms of educational resources. Even with my basic knowledge, I look at the install manual for a GTN750 and it looks like gibberish. There are no local avionics programs around. I'm hoping there's some way to do this with books or online. I'd be willing to buy wire and tools to practice, but I can't exactly buy entire panels just to practice wiring them. Thanks in advance for the input. |
| Question: Is it safer to fly at night? Posted: 07 Sep 2015 05:18 AM PDT For airliners, it makes no practical difference. I actually preferred to fly at night, an airliner cockpit is a very cozy place at night, or so I always found. I am not so keen on flying single engined aircraft over difficult terrain at night, for the reasons that John R alluded to, but pretty much anything else is no issue. |
| Question: Hello pilots have you ever flown through the Bermuda Triangle? Posted: 07 Sep 2015 05:08 AM PDT Colombo airport - Was often a stop for flights between Indonesia and Saudi Arabia (Hajj flights) for 707 and DC8 - I recall a terrible accident in 1978 Icelandic DC8 crash - https://en.wikipedia.org/wiki/Icelandic_... Bermuda Triangle - |
| Question: Do they have any other pilot rest area on freighter planes other than the 747 freighter? Posted: 07 Sep 2015 01:43 AM PDT Ya, the 747 is a unique plane and it has an upper deck so there is no worry but I want to know where they rest on the MD-11F, 777-200F, A330-200F and the Douglas DC-10F. Where it is a 3-4 man crew flight (probably 4-5 man crew for the DC-10F) a second officer or the other shift usually rest outside the cockpit. I know that there is a very small bunker or a bed behind the cockpit but other than that, do they have any other seats on those freighters? Or do they have to keep lying in the bunker for hours? |
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