vintage1
Apr 26, 2006, 03:47 PM
Over in the open forum there is a thread running on the AMA definition of parkflyers.
It was so ridiuculous that I started by blasting the AMA.
However after reflection, it occured to me that some kind of classification of aircraft from a safety perspective might be useful in any case.
A few quick calculations on kinetic energy, related to weight, and wing area showed that a classification based on weight divided by wingspan was both extremely simple, and actually did seem to sort at least my models into groups that I felt were very representative of how scared I feel operating them around people :D
The reasoning, and a proposed set of classifications are in this thread.
http://www.rcgroups.com/forums/showthread.php?t=508192
Post #267 I think is the classification...go back a bit for the reasoning as to why the formula is BROADLY representative of kinetic energy of the model..
PLEASE will all gurus join in and try to make sure that if the AMA MUST start thinking along those lines, at least let those lines be rational lines, and not just something some idiot bureaucrat plucks out of his :censored: ..especially if those classifications become used by officials to regulate flying in public parks etc.
I mean less than 2lb and less than 200 ft..I cam build a 120mph plus pylon racer at less than 2lb..
It was so ridiuculous that I started by blasting the AMA.
However after reflection, it occured to me that some kind of classification of aircraft from a safety perspective might be useful in any case.
A few quick calculations on kinetic energy, related to weight, and wing area showed that a classification based on weight divided by wingspan was both extremely simple, and actually did seem to sort at least my models into groups that I felt were very representative of how scared I feel operating them around people :D
The reasoning, and a proposed set of classifications are in this thread.
http://www.rcgroups.com/forums/showthread.php?t=508192
Post #267 I think is the classification...go back a bit for the reasoning as to why the formula is BROADLY representative of kinetic energy of the model..
PLEASE will all gurus join in and try to make sure that if the AMA MUST start thinking along those lines, at least let those lines be rational lines, and not just something some idiot bureaucrat plucks out of his :censored: ..especially if those classifications become used by officials to regulate flying in public parks etc.
I mean less than 2lb and less than 200 ft..I cam build a 120mph plus pylon racer at less than 2lb..