Re: Europa-List: Airspeed Sensor Switch

[Jan de Jong <jan.de.jong@xs4all.nl>]

I have a program output with calculated airspeed in mm/s (column 3) vs 
pitot-static pressure in Pa (column 2). I hope I'm attaching it.
You can find "pressure conversion" to psi or "H2O and "velocity 
conversion" using Google.
Hope this is of use.
Regards,
Jan de Jong

europaman wrote:
>
> Hi All,
> Does anyone have an idea what 60 knots equates to in PSI? I'm trying to buy an
air switch that closes below a certain airspeed that is adjustable for different
air speeds. I read about one on the Aeroelectric list but it apparently is
for driving another electronic circuit. I want to just turn off a 12 volt 
circuit
above a given airspeed for a gear warning system. 
> Thanks. 
> Troy Maynor
>   

indicated airspeed, middle regime
omit every second from lookup table (gives max. deltas as shown)
 d-pressure ind-airspeed interpolated  delta   d_prev  max-res
     Pa          mm/s        mm/s       mm/s     mm/s     mm/s
  0       512       28886       28829       -57     1862       29
          576       30635       30587       -48     1749       27
  1       640       32289       32248       -41     1654       25
          704       33861       33825       -36     1572       24
  2       768       35362       35331       -31     1501       23
          832       36802       36774       -28     1440       22
  3       896       38187       38162       -25     1385       21
          960       39523       39501       -22     1336       20
  4      1024       40815       40794       -21     1292       20
         1088       42066       42048       -18     1251       19
  5      1152       43281       43264       -17     1215       18
         1216       44462       44446       -16     1181       18
  6      1280       45612       45597       -15     1150       17
         1344       46733       46719       -14     1121       17
  7      1408       47827       47815       -12     1094       17
         1472       48897       48885       -12     1070       16
  8      1536       49943       49932       -11     1046       16
         1600       50967       50957       -10     1024       16
  9      1664       51971       51961       -10     1004       15
         1728       52955       52945       -10      984       15
 10      1792       53920       53912        -8      965       15
         1856       54869       54860        -9      949       14
 11      1920       55801       55793        -8      932       14
         1984       56717       56709        -8      916       14
 12      2048       57618       57611        -7      901       14
         2112       58505       58498        -7      887       13
 13      2176       59378       59371        -7      873       13
         2240       60238       60232        -6      860       13
 14      2304       61086       61080        -6      848       13
         2368       61922       61916        -6      836       13
 15      2432       62746       62740        -6      824       12
         2496       63559       63554        -5      813       12
 16      2560       64362       64356        -6      803       12
         2624       65154       65149        -5      792       12
 17      2688       65936       65931        -5      782       12
         2752       66709       66704        -5      773       12
 18      2816       67473       67468        -5      764       11
         2880       68228       68223        -5      755       11
 19      2944       68974       68970        -4      746       11
         3008       69712       69708        -4      738       11
 20      3072       70442       70438        -4      730       11
         3136       71164       71160        -4      722       11
 21      3200       71879       71875        -4      715       11
         3264       72586       72582        -4      707       11
 22      3328       73286       73283        -3      700       10
         3392       73980       73976        -4      694       10
 23      3456       74666       74663        -3      686       10
         3520       75346       75343        -3      680       10
 24      3584       76020       76016        -4      674       10
         3648       76687       76684        -3      667       10
 25      3712       77348       77345        -3      661       10
         3776       78004       78000        -4      656       10
 26      3840       78653       78650        -3      649       10
         3904       79297       79294        -3      644       10
 27      3968       79936       79933        -3      639        9
         4032       80569       80566        -3      633        9
 28      4096       81197       81194        -3      628        9
         4160       81820       81817        -3      623        9
 29      4224       82438       82435        -3      618        9
         4288       83051       83048        -3      613        9
 30      4352       83659       83657        -2      608        9
         4416       84263       84260        -3      604        9
 31      4480       84862       84860        -2      599        9
         4544       85457       85454        -3      595        9
 32      4608       86047       86045        -2      590        9
         4672       86633       86631        -2      586        9
 33      4736       87215       87213        -2      582        9
         4800       87793       87791        -2      578        9
 34      4864       88367       88365        -2      574        8
         4928       88937       88935        -2      570        8
 35      4992       89503       89501        -2      566        8
         5056       90065       90063        -2      562        8
 36      5120       90623       90621        -2      558        8
         5184       91178       91176        -2      555        8
 37      5248       91729       91727        -2      551        8
         5312       92277       92275        -2      548        8
 38      5376       92821       92819        -2      544        8
         5440       93362       93360        -2      541        8
 39      5504       93899       93897        -2      537        8
         5568       94433       94431        -2      534        8
 40      5632       94964       94962        -2      531        8
         5696       95492       95490        -2      528        8
 41      5760       96016       96015        -1      524        8
         5824       96538       96536        -2      522        8
 42      5888       97056       97055        -1      518        8
         5952       97572       97570        -2      516        8
 43      6016       98084       98083        -1      512        8
         6080       98594       98592        -2      510        7
 44      6144       99101       99099        -2      507        7
         6208       99605       99603        -2      504        7
 45      6272      100106      100105        -1      501        7
         6336      100605      100603        -2      499        7
 46      6400      101101      101099        -2      496        7
         6464      101594      101593        -1      493        7
 47      6528      102085      102083        -2      491        7
         6592      102573      102572        -1      488        7
 48      6656      103059      103057        -2      486        7
         6720      103542      103541        -1      483        7
 49      6784      104023      104021        -2      481        7
         6848      104501      104500        -1      478        7
 50      6912      104977      104976        -1      476        7
         6976      105451      105449        -2      474        7
 51      7040      105922      105921        -1      471        7
         7104      106391      106390        -1      469        7
 52      7168      106858      106856        -2      467        7
         7232      107322      107321        -1      464        7
 53      7296      107785      107783        -2      463        7
         7360      108245      108244        -1      460        7
 54      7424      108703      108702        -1      458        7
         7488      109159      109157        -2      456        7
 55      7552      109612      109611        -1      453        7
         7616      110064      110063        -1      452        7
 56      7680      110514      110513        -1      450        7
         7744      110962      110960        -2      448        7
 57      7808      111407      111406        -1      445        6
         7872      111851      111850        -1      444        6
 58      7936      112293      112292        -1      442        6
         8000      112733      112732        -1      440        6
 59      8064      113171      113170        -1      438        6
         8128      113607      113606        -1      436        6
 60      8192      114041      114040        -1      434        6
         8256      114474      114472        -2      433        6
 61      8320      114904      114903        -1      430        6
         8384      115333      115332        -1      429        6
 62      8448      115760      115759        -1      427        6
         8512      116186      116184        -2      426        6
 63      8576      116609      116608        -1      423        6
         8640      117031      117030        -1      422        6
 64      8704      117452      117450        -2      421        6
         8768      117870      117869        -1      418        6
 65      8832      118287      118286        -1      417        6
         8896      118702      118701        -1      415        6
 66      8960      119116      119115        -1      414        6
         9024      119528      119527        -1      412        6
 67      9088      119938      119937        -1      410        6
         9152      120347      120346        -1      409        6
 68      9216      120755      120753        -2      408        6
         9280      121160      121160         0      405        6
 69      9344      121565      121564        -1      405        6
         9408      121968      121967        -1      403        6
 70      9472      122369      122368        -1      401        6
         9536      122769      122768        -1      400        6
 71      9600      123167      123166        -1      398        6
         9664      123564      123563        -1      397        6
 72      9728      123959      123958        -1      395        6
         9792      124353      124352        -1      394        6
 73      9856      124746      124745        -1      393        6
         9920      125137      125136        -1      391        6
 74      9984      125527      125526        -1      390        6
        10048      125916      125915        -1      389        6
 75     10112      126303      126302        -1      387        6
        10176      126689      126688        -1      386        6
 76     10240      127073      127072        -1      384        6
        10304      127456      127455        -1      383        5
 77     10368      127838      127837        -1      382        5
        10432      128219      128218        -1      381        5
 78     10496      128598      128597        -1      379        5
        10560      128976      128975        -1      378        5
 79     10624      129353      129352        -1      377        5
        10688      129728      129727        -1      375        5
 80     10752      130102      130102         0      374        5
        10816      130476      130474        -2      374        5
 81     10880      130847      130847         0      371        5
        10944      131218      131217        -1      371        5
 82     11008      131587      131587         0      369        5
        11072      131956      131955        -1      369        5
 83     11136      132323      132322        -1      367        5
        11200      132689      132688        -1      366        5
 84     11264      133053      133053         0      364        5
        11328      133417      133416        -1      364        5
 85     11392      133779      133779         0      362        5
        11456      134141      134140        -1      362        5
 86     11520      134501      134500        -1      360        5
        11584      134860      134859        -1      359        5
 87     11648      135218      135217        -1      358        5
        11712      135575      135574        -1      357        5
 88     11776      135931      135930        -1      356        5
        11840      136286      136285        -1      355        5
 89     11904      136640      136639        -1      354        5
        11968      136992      136992         0      352        5
 90     12032      137344      137343        -1      352        5
        12096      137694      137694         0      350        5
 91     12160      138044      138043        -1      350        5
        12224      138392      138392         0      348        5
 92     12288      138740      138739        -1      348        5
        12352      139086      139086         0      346        5
 93     12416      139432      139431        -1      346        5
        12480      139776      139776         0      344        5
 94     12544      140120      140119        -1      344        5
        12608      140463      140462        -1      343        5
 95     12672      140804      140804         0      341        5
        12736      141145      141144        -1      341        5
 96     12800      141484      141484         0      339        5
        12864      141823      141822        -1      339        5
 97     12928      142161      142160        -1      338        5
        12992      142498      142497        -1      337        5
 98     13056      142834      142833        -1      336        5
        13120      143169      143168        -1      335        5
 99     13184      143503      143502        -1      334        5
        13248      143836      143835        -1      333        5
100     13312      144168      144167        -1      332        5
        13376      144499      144499         0      331        5
101     13440      144830      144829        -1      331        5
        13504      145159      145159         0      329        5
102     13568      145488      145487        -1      329        5
        13632      145816      145815        -1      328        5
103     13696      146143      146142        -1      327        5
        13760      146469      146468        -1      326        5
104     13824      146794      146794         0      325        5
        13888      147119      147118        -1      325        5
105     13952      147442      147442         0      323        5
        14016      147765      147764        -1      323        5
106     14080      148087      148086        -1      322        5
        14144      148408      148407        -1      321        5
107     14208      148728      148728         0      320        5
        14272      149048      149047        -1      320        5
108     14336      149366      149366         0      318        4
        14400      149684      149683        -1      318        4
109     14464      150001      150000        -1      317        4
        14528      150317      150317         0      316        4
110     14592      150633      150632        -1      316        4
        14656      150948      150947        -1      315        4
111     14720      151261      151261         0      313        4
        14784      151575      151574        -1      314        4
112     14848      151887      151887         0      312        4
        14912      152199      152198        -1      312        4
113     14976      152509      152509         0      310        4
        15040      152819      152819         0      310        4
114     15104      153129      153128        -1      310        4
        15168      153437      153437         0      308        4
115     15232      153745      153744        -1      308        4
        15296      154052      154052         0      307        4
116     15360      154359      154358        -1      307        4
        15424      154664      154664         0      305        4
117     15488      154969      154968        -1      305        4
        15552      155273      155273         0      304        4
118     15616      155577      155576        -1      304        4
        15680      155880      155879        -1      303        4
119     15744      156182      156181        -1      302        4
        15808      156483      156483         0      301        4
120     15872      156784      156783        -1      301        4
        15936      157084      157083        -1      300        4
121     16000      157383      157383         0      299        4
        16064      157682      157681        -1      299        4
122     16128      157980      157979        -1      298        4
        16192      158277      158276        -1      297        4
123     16256      158573      158573         0      296        4
        16320      158869      158869         0      296        4
124     16384      159165      159164        -1      296        4