2017年6月23日金曜日

Fighter destroyed


I destroyed the fuselage of Fighter this morning, while I was processing break-in step on ENYA 20 TV motor. I feel some ashamed to write about this phenomena that it was not destroyed not while the flight but I was guiding it on the ground, just a taxing miss control of my own. Because the nose gear set in Fighter is fixed one and it's lateral direction change is done by rudder and motor control giving some wind flow on the rudder surface. This is relatively difficult for a small model airplane, and it hit on some convex part, it lost main gear from the fixing base of the fuselage, vertical and horizontal stabilizers destroyed together.
This destruction would be fairly repaired before the next flight day, on coming Tuesday.
Over 50 years ago, the concept to wear the silencer or  the muffler on the modele engines did not exist, because some considerable power down was inevitable if unnecessary parts are set on exhaust port. After that some noise problem as pollution appeared.
Consequently, the motor with muffler is burdened on an old airplane the Center of Gravity comes forward because of muffler weight. As a countermeasure of the displacement of CG, extension of tail moment, shortening of nose moment and just move the main wing position forward on the fuselage in addition to making the  battery and servos position backward.
Next one on the way is PILOT Junior Original version is so did to extend the tail moment that is the same as TETRA Rookie 10. More over, as I deeply feel the inconvenience of main wing's Dihedral Angle that causes rolling phenomena when tail down movement was done by rudder action. Though Dihedral angle is applied to establish the stability while straight flight, an excellent proportional system does not require such kind of stabilization construction at all.
Rolling bad habit while Knife edge maneuver is unnecessary movement that should be eliminated if stable maneuver drawing is desired.
So, the main wing would not be make use of that of Rookie 10 but it would be newly fabricated with purely symmetric airfoil shape and of course dihedral angle would be zero degree, flat one.
Recently, accident follows one after another, take care not to follow jinx, If it happen twice sure to do three times!.

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