The Hangar

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Shalvenay

00:18

@fooot -- I take it the effect is insignificant in most aircraft, then?

fooot

@Shalvenay Yes, especially since the possible displacement in those directions is more limited.

Shalvenay

00:34

@fooot -- the one case that does have me wondering is of a chopper with a sling load...

fooot

That's a bit more complex.

The force will be applied at a point offset from the CG. And having something attached like that definitely affects the dynamics.

Shalvenay

00:49

yeah, I'd figure it'd be fairly dynamically complex compared to a simple CG shift

also, read Paul Bertorelli's posting (on AVweb) re: the mess with the FAA simulator-for-training rules that just recently happened

makes me want to dig out the stick and see if I can get FlightGear going again (I had a terrible time getting the simulated Cessna to take off straight last time I did it, although I'm using a one of the USB Sidewinder sticks with the twist rudder, which probably doesn't help things compared to having foot pedals :P)

fooot

01:16

Yeah, flying X-Plane right now. Rudder pedals are definitely easier to use than the joystick twist.

1 hour later…

casey

02:28

A: Removing screws from Cessna wing tank cover

The people that yadda yadda re what you can and can't do are the very people that would turn you in to the feds. The new Americans with no depth to their souls The guy was looking for help taking screws out, wow big deal He was asking for screw removal advice not legal advice You can take anythi...

Farhan

@casey Is that spam?

I marked it as not an answer, being polite.

@fooot Sort of yes. I wanted to know how many different types of engines are.

Shalvenay

@Farhan -- excluding a V-1 and its pulsejet, there are two basic engine types: reciprocating (Otto cycle) and turbine (Brayton cycle)

the latter took a while to perfect, so aviation got its start using the former, but reciprocating engines are nowadays only used for low-HP apps as you can't build a 100hp gas turbine all that easily

turbines can be turboshaft (helicopters), turboprop (modern propeller aircraft), turbojet (old jets), low-bypass turbofan (slightly newer transport jets, military fast jets), or high-bypass turbofan (modern transport jets)

piston engines can be rotary (old and very quaint), radial (old, not quite as quaint), inline, or opposed (the last two are what you'll see these days save for a few rare apps in vintage airliners and warbirds, as well as piston ag planes but that's being taken over by turboprops)

fooot

@Shalvenay That's pretty much it. Electric is starting to develop more too, and ramjet type things are out there.

Shalvenay

most aviation piston engines are spark-ignited and run on gasoline (fun fact: the Predator's engine will run quite happily on 87-octane mogas), but a few aviation diesels have been built (running on jet-A)

yep. electric is rare and used for some exotic apps, and ramjets are used for going extremely fast

casey

@Farhan i flagged it NAA

Shalvenay

02:43

@Farhan -- also flagged NAA

1 hour later…

kevin

04:12

flagged NAA as well

4 hours later…

voretaq7

08:39

I stomped on it, 'cuz it's not an answer (and borders on one of those "daygumm gub'mint up in mah biz-niz" type rants that I despise so)

6 hours later…

rbp

14:50

@Shalvenay also the ram-jet in the SR-71

@voretaq7 re 20HP, in the warrior/archer fleet I flew, some warriors felt like they had 180HP and some of the archers felt like 160.

Stack Exchange

15:02

Q: how should we handle "commercial pilot"

Sometimes we get questions about "commercial pilots," by which people mean pilots working for air carriers (who hold an ATP) rather than people who hold a commercial certificate. Other times, we have people asking questions specifically about holders of a commercial certificate. Should there ...

1 hour later…

CGCampbell

16:29

@rbp question for you (I'm an enthusiast, not a pilot): re: part 91 ... is that a worldwide reg, or us, or..

falstro

Part 91 is a FAR thus US only

CGCampbell

@falstro (yes :) ) I want to make a point to rbp, when he is here :)

falstro

That said, rules and regs in aviation are usually aligned pretty well across borders thanks to ICAO, so depending on what reg exactly it might well be international

Ah, ok :)

CGCampbell

that is, before I answer/comment on his meta question :)

CGCampbell

17:03

@rbp never mind, I put an answer up (probably wrong, certainly dumb, and possibly invalid).

rbp

17:17

@CGCampbell to which questioN? Sorry lost the con text

CGCampbell

your meta question

rbp