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- Newsgroups: rec.models.rockets
- Path: sparky!uunet!europa.eng.gtefsd.com!emory!sol.ctr.columbia.edu!usc!sdd.hp.com!hp-cv!hp-pcd!hpcvaac!billn
- From: billn@hpcvaac.cv.hp.com (bill nelson)
- Subject: Re: Tracking
- Message-ID: <1993Jan28.185343.10126@hpcvaac.cv.hp.com>
- Organization: Hewlett-Packard Company, Corvallis, Oregon USA
- References: <C1JHAE.3Cp@usenet.ucs.indiana.edu>
- Date: Thu, 28 Jan 1993 18:53:43 GMT
- Lines: 33
-
- ntaib@silver.ucs.indiana.edu (Iskandar Taib) writes:
- :
- : >This is a little misleading. They will both fall at the same rate.
- : >They will not fall at the same descent angle - the one with the greater
- : >lateral area of resistance will drift further.
- :
- : Actually, given enough time to accelerate to wind velocity, both
- : will drift sideways at the same speed, which is zero airspeed and
- : whatever the wind velocity is for groundspeed.
-
- Yeah - I corrected my statement in another response on another thread.
-
- : Now of course behavior will be different if wind shear or different
- : wind velocities at different altitudes exist.
- :
- : This one's been beaten to death in model airplane circles - whether
- : a model will "feel" wind when in free flight, i.e. when there isn't
- : an operator on the ground telling it what to do by his frame of
- : reference.
-
- Anyone who has watched a glider closely should know that it does - if
- there is a change in the relative wind.
-
- : An interesting thought experiment would be to fly an R/C pattern ship
- : off the deck of an aircraft carrier sailing downwind at exact wind
- : velocity. The operator doesn't sense and wind, and the airplane doesn't
- : seem to experience a wind either.
-
- Or upwind so that the relative airspeed was equal to the takeoff velocity
- of the airplane. No runway length would be necessary.
-
- Bill
-
-