CLSYSTEM
BELLCRANK-FLAPS-ELEVATOR DEFLECTION AND GEOMETRY
COMPUTATION PROGRAM
IN CONTROL LINE MODEL AIRCRAFT
(By S. CABITZA)
E-mail: cabitza@dn425.unica.it
This program allows you to calculate linearity (tracking) errors of both conventional and symmetric control line systems. It is also possible to dimensioning lever horns if you input deflection angles, or deflection angles if you input lever horn. Finally, you must calculate bellcranck and elevator positions in order to give conventional systems partially symmetric, minimizing tracking errors.
A typical output print is reported below, where subscripts 0, 1, 2 are referred, respectively, to bellcranck (0), flaps (1) and elevator (2). Subscripts 1L (flaps) and 2L (elevator) are referred to linear deflections calculated relative to 0 (bellcranck) and to 1 (flaps).
FILE NAME cs_4045.dat
BELLCRANK - FLAPS PUSHROD LENGTH = 5
BELLCRANK HORN = 1
BELLCRANK MAXIMUM DEFLECTION =-45 45
BELLCRANK HORIZONTAL POSITION =-.854
BELLCRANK VERTICAL POSITION = .971
FLAPS - ELEVATOR PUSHROD LENGTH = 15
FLAPS HORN = 1.1
FLAPS MAXIMUM DEFLECTION =-40.000 40.000
ELEVATOR HORN = 1
ELEVATOR MAXIMUM DEFLECTION =45.000 -45.000
DISTANCE BETWEEN WING AND ELEVATOR AXIS = 1.825
| Teta0 | Teta1 | Teta1L | Error |
| -45.000 | 40.000 | 40.000 | 0.000 |
| -40.000 | 35.598 | 35.556 | 0.043 |
| -35.000 | 31.208 | 31.111 | 0.096 |
| -30.000 | 26.813 | 26.667 | 0.147 |
| -25.000 | 22.406 | 22.222 | 0.184 |
| -20.000 | 17.977 | 17.778 | 0.199 |
| -15.000 | 13.524 | 13.333 | 0.190 |
| -10.000 | 9.042 | 8.889 | 0.154 |
| -5.000 | 4.534 | 4.444 | 0.089 |
| 0.000 | 0.000 | 0.000 | 0.000 |
| 5.000 | -4.555 | -4.444 | -0.110 |
| 10.000 | -9.122 | -8.889 | -0.234 |
| 15.000 | -13.693 | -13.333 | -0.360 |
| 20.000 | -18.252 | -17.778 | -0.475 |
| 25.000 | -22.781 | -22.222 | -0.559 |
| 30.000 | -27.255 | -26.667 | -0.589 |
| 35.000 | -31.644 | -31.111 | -0.533 |
| 40.000 | -35.908 | -35.556 | -0.353 |
| 45.000 | -40.000 | -40.000 | -0.000 |
| Teta1 | Teta2 | Teta2L | Error |
| -40.000 | 45.000 | 45.000 | -0.000 |
| -35.000 | 39.253 | 39.375 | -0.122 |
| -30.000 | 33.539 | 33.750 | -0.211 |
| -25.000 | 27.861 | 28.125 | -0.264 |
| -20.000 | 22.220 | 22.500 | -0.280 |
| -15.000 | 16.616 | 16.875 | -0.259 |
| -10.000 | 11.048 | 11.250 | -0.202 |
| -5.000 | 5.511 | 5.625 | -0.114 |
| 0.000 | 0.000 | 0.000 | 0.000 |
| 5.000 | -5.493 | -5.625 | 0.132 |
| 10.000 | -10.977 | -11.250 | 0.273 |
| 15.000 | -16.468 | -16.875 | 0.407 |
| 20.000 | -21.983 | -22.500 | 0.517 |
| 25.000 | -27.548 | -28.125 | 0.577 |
| 30.000 | -33.199 | -33.750 | 0.551 |
| 35.000 | -38.988 | -39.375 | 0.387 |
| 40.000 | -45.000 | -45.000 | 0.000 |
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