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Conference vmszoo::rc

Title:Welcome To The Radio Control Conference
Notice:dir's in 11, who's who in 4, sales in 6, auctions 19
Moderator:VMSSG::FRIEDRICHS
Created:Tue Jan 13 1987
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1706
Total number of notes:27193

692.0. "center of grav prog" by SALEM::PISTEY () Thu Sep 08 1988 16:55

    
        Hi,
    
             I have not replied to note 4 yet (whos who) so ,i;ll
        say hello here.
    
      Now for the real message. Does anyone out there remember a
      few years ago when RC mag. had an article on Canards and 
      in the article was a program for center of gravity calculations
      using a computer (I'm not sure what they are yet) that was
      written in Basic (IBM or HP I think).?
    
    Well anyway I have this program rewritten in to DEC basic and
    it works quite well. I used the example from the mag to test
    it originally and now I have lost my copy of the mag.If someone
    has this could you reply with the "test info and desired results"
    please?
    
    
                                                     Kevin Pistey
                                                     SALEM::PISTEY
T.RTitleUserPersonal
Name
DateLines
692.1Programs no longer online - send mail to POBOX::KAPLOWCHGV04::KAPLOWSet the WAYBACK machine for 1982Fri Sep 09 1988 23:4814
        I don't know what you had to do to make it run under VAX Basic; I
        ran it without changes (I think) under RT-11, back when it was
        published in the June 1984 MA. My old copy can be found at
        CHGV04::DISK$RGK:[ROCKETS.PROGRAMS]CANARD.BAS. I'll see what I can
        find for you re the test data.
        
        BTW, my NEUTRA.FOR (same directory) does similar for conventional
        AND canard aircraft. You might check and see how the results
        compare between the two. For a conventional tail, the tail moment
        is the distance from the wing TE to the stab LE. Nothing changes
        for a canard, except the measured distance is now NEGATIVE, and
        includes both wing and stab chords! 
        
        Bob 
692.2canard data...CHGV04::KAPLOWSet the WAYBACK machine for 1982Tue Sep 13 1988 20:5449
        I found the magazine this weekend, and finally have the time
        to pass it on:
        
        Input data:
        
        Total Span = 57
        wing root chord = 11.5
	wing tip chord = 9
        wing edge tip/root offset = -4
        
        stab span = 23
        root chord = 7
        tip chord = 5
        root offset = 1
        
        tail moment = 16.5
        
        2 vertical fins
        fin height = 10
        root chord = 9.5
        tip chord = 5
        root offset = 7
        
        airplane weight = 116 oz
        engine size = 0.40 in�
        
        
        output data:
        wing area = 584.25
        stab area = 138
        fin area = 145
        
        wing a c = 0.66
        stab a c = 1.99
        fin a c = 5.01
        
        canard cg is 3.55 to 4.26 in ahead of wing le
        wing loading = 23.13 oz/ft�
        engine loading = 290.0 oz/in�
        
        vee equation = 0.40
        fin area is larger than needed
        40.25% or 58.37 in� is sufficient.
        
        Just for kicks, I ran the same design thru my NP program, and
        got a CG loaction in the same area. Must be right, then :-)
        
       
        
692.3Thanks for the infoSALEM::PISTEYFri Sep 16 1988 09:0513
    
    
        Thanks Bob, That was just the info I needed. 
    BTW...... as I remember (being of the non programmer type) all
    I had to do to convert the program to Vax basic was to change
    some of their commands like ..DISP..(should be print I think)
    otherwise you are right it requires very little modifying.What 
    I should have said was I linked it (does that make sense?)
    and it runs very fast and gives me nice looking records for
    my files.
    
                                                   Thanks again
                                                   Kevin