AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Flight Envelopes          AirTalk.org Forum Index -> Aviation (Aerobatics) View previous topic :: View next topic   Author Message Michael Nyrup Guest Posted: Sun Aug 20, 2006 8:42 pm    Post subject: Flight Envelopes Hi, I am looking for an Excel sheet or a dedicated program to generate flight envelopes. Please let me know if such exsists. Best regards Back to top BTIZ Guest Posted: Sun Aug 20, 2006 9:56 pm    Post subject: Re: Flight Envelopes Please define "flight envelopes". I have a copy of a cross country planner designed in excel. BT "Michael Nyrup" <aerosign-remove me-@hotmail.com> wrote in message news:355c1$44e8826a$57ef4723$26514 (AT) news (DOT) nal-medienet.dk... Quote: Hi, I am looking for an Excel sheet or a dedicated program to generate flight envelopes. Please let me know if such exsists. Best regards Back to top Michael Nyrup Guest Posted: Mon Aug 21, 2006 1:16 am    Post subject: Re: Flight Envelopes Quote: Please define "flight envelopes". With "Flight Envelope" I mean a pictorial way of displaying the strength of a plane. Load factor on the Y-axis and airspeed on X-axis. Va, Vne, Vd etc. is plotted and you get a graphical presentation of the plane limitations. I hope it is a little clearer... Best regards MN Back to top BTIZ Guest Posted: Mon Aug 21, 2006 3:58 am    Post subject: Re: Flight Envelopes ok... that flight envelope.. I do not have a spreadsheet that would depict that for any given aircraft given certain input information... but I'm sure someone does B "Michael Nyrup" <aerosign-remove me-@hotmail.com> wrote in message news:932b9$44e8c454$57ef4723$21049 (AT) news (DOT) nal-medienet.dk... Quote: Please define "flight envelopes". With "Flight Envelope" I mean a pictorial way of displaying the strength of a plane. Load factor on the Y-axis and airspeed on X-axis. Va, Vne, Vd etc. is plotted and you get a graphical presentation of the plane limitations. I hope it is a little clearer... Best regards MN Back to top john smith Guest Posted: Mon Aug 21, 2006 5:47 am    Post subject: Re: Flight Envelopes In article <FO5Gg.269$8J2.6@fed1read11>, "BTIZ" <btiznospm2 (AT) cox (DOT) nospm.net> wrote: Quote: ok... that flight envelope.. I do not have a spreadsheet that would depict that for any given aircraft given certain input information... but I'm sure someone does B "Michael Nyrup" <aerosign-remove me-@hotmail.com> wrote in message news:932b9$44e8c454$57ef4723$21049 (AT) news (DOT) nal-medienet.dk... Please define "flight envelopes". With "Flight Envelope" I mean a pictorial way of displaying the strength of a plane. Load factor on the Y-axis and airspeed on X-axis. Va, Vne, Vd etc. is plotted and you get a graphical presentation of the plane limitations. I hope it is a little clearer... I haven't made one for a year or two. It is called a V-n or V-g diagram. You can make it yourself. You look up all the information in the POH/AFM. Horizontal line is airspeed. Vertical line is g-loading. Top border is positive-g load limit. Bottom border is negative-g load limit. Right border is Vne. Left border is Zero kts/mph. The positive knee is at Va, Vs is another point at 1-g. I would have to go back and review my sources, but this is what I recall from memory. I asked Cessna and Piper for the diagrams they generate based on flight test data, but they would not provide it. Back to top Guest Posted: Mon Aug 21, 2006 5:12 pm    Post subject: Re: Flight Envelopes Here's a "Flight Envelope" one of my buddies is working on: http://www.personalblimp.com/index.html See ya, Dave BTIZ wrote: > Please define "flight envelopes"... Back to top Michael Nyrup Guest Posted: Mon Aug 21, 2006 9:28 pm    Post subject: Re: Flight Envelopes Quote: I haven't made one for a year or two. It is called a V-n or V-g diagram. You can make it yourself. You look up all the information in the POH/AFM. Horizontal line is airspeed. Vertical line is g-loading. Top border is positive-g load limit. Bottom border is negative-g load limit. Right border is Vne. Left border is Zero kts/mph. The positive knee is at Va, Vs is another point at 1-g. I would have to go back and review my sources, but this is what I recall from memory. I asked Cessna and Piper for the diagrams they generate based on flight test data, but they would not provide it. I too have made a few by hand but its never as nice as it would be if generated by excel or similar. Back to top Uli Guest Posted: Thu Aug 24, 2006 3:28 pm    Post subject: Re: Flight Envelopes Michael Nyrup wrote: Quote: I haven't made one for a year or two. It is called a V-n or V-g diagram. You can make it yourself. You look up all the information in the POH/AFM. Horizontal line is airspeed. Vertical line is g-loading. Top border is positive-g load limit. Bottom border is negative-g load limit. Right border is Vne. or Vd, if used for design and load calculations Quote: Left border is Zero kts/mph. The positive knee is at Va, Vs is another point at 1-g. I would have to go back and review my sources, but this is what I recall from memory. I asked Cessna and Piper for the diagrams they generate based on flight test data, but they would not provide it. I too have made a few by hand but its never as nice as it would be if generated by excel or similar. and don't forget to consider gust loads. john described the manoevring envelope which is only part of the flight envelope. michael: for which purpose do you need the envelope? if you just want to create a placard for your cockpit, refer to the POH; there you should find any information needed. if you want to design a new airplane, refer to the applicable certification specification which describes the flight envelope pretty well (CS-22 in europe). uli Back to top Michael Nyrup Guest Posted: Wed Aug 30, 2006 11:56 pm    Post subject: Re: Flight Envelopes Quote: michael: for which purpose do you need the envelope? if you just want to create a placard for your cockpit, refer to the POH; there you should find any information needed. if you want to design a new airplane, refer to the applicable certification specification which describes the flight envelope pretty well (CS-22 in europe). No I am not designing an airplane I just want to have the envelopes with me and be able to compare them between types. No problem, I can do it by hand, it's just had been easier (and nicer) to enter the data and have it plotted automatically. Regards Michael Back to top Michael Nyrup Guest Posted: Wed Aug 30, 2006 11:59 pm    Post subject: Re: Flight Envelopes Quote: michael: for which purpose do you need the envelope? if you just want to create a placard for your cockpit, refer to the POH; there you should find any information needed. if you want to design a new airplane, refer to the applicable certification specification which describes the flight envelope pretty well (CS-22 in europe). No I am not designing an airplane I just want to have the envelopes with me and be able to compare them between types. No problem, I can do it by hand, it's just had been easier (and nicer) to enter the data and have it plotted automatically. 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