On 12/5/06, Jeremy Santizo <[EMAIL PROTECTED]> wrote: > > Can anyone tell me the right speed (vertical speed too) for landing the 747 > and 737 (i've tried 175knots, full flaps, but something goes wrong always > and i finish in the middle of the city,)and if it has thurst reverse like > the citation, or other way to reduce speed before applying brakes?
what i usually do, when trying to learn a new flight model, if i don't have access to the data for it, is to find out where the model stalls under 3 conditions : 1) stall with no flaps 2) stall with 50% flaps 3) stall with full flaps i usually do this within a few thousand feet of my airports altitude, to get as close to the numbers as possible when i will be on an actual approach. you don't "need" speedbrakes for descent, unless you've planned poorly, or if you are purposefully descending aggresively. my understanding is that speedbrakes _can_ come in pretty handy when couple with autobrake systems, as they can deploy on touchdown, spoiling lift very aggressively, and avoiding and float on ground effect. anywho ... once you get these numbers, i think the usual rule of thumb while on final, is to fly these airspeeds + 10 knots, give or take, all the way to the threshold. also, when testing, make sure you are aware of your overall aircraft weight (with fuel and payload). on a "heavy", this can make a huge difference. when i first learn an aircraft, i usually tend to go with a light fuel and payload weight to make controlling the aircraft easier. also, don't forget your "pitch,power,trim" rule. use pitch to control your airspeed. to go slower, pull the nose up, to go faster, push the nose down. control your vertical speed using power. if you want to descend, reduce power, but make sure to keep your pitch constant. in practice, you may do both of these things at the same time, but mentally, you should keep the purpose of these actions seperate, and understand what action has what effect. once you've established your glide, use trim to get get "hands free" on the controls. you may also want to learn to use the ILS, even when you are flying in visual conditions. learning to fly the glideslope will force you to learn how to control the aircraft precisely using pitch/power principles. Tony -- X-SA user ? 0.5.1 is out ! XData 0.1 for X-SA is out ! http://x-plane.dsrts.com ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-users
