An unexpected affair yesterday

It's a matter for great regret to report about yesterday, my first EP plane was lost never to return, just because of my fault, preparations for the flight was not enough to wipe out any anxiety. The origin of the accident caused by the falling down and destroyed the transmitter Futaba 10J and snap role switch was out of order. In spite of the replacement of the switches from old ones by myself, the original function was not obtained, so I made up mind to utilize 18MZ for all the airplanes I'm keeping. Considerable understanding capability is required to understand all the functions it has, actually not yet, especially, exponential setting for aileron, elevator and rudder functions. These potential anxiety must have guided me to some miserably worst result yesterday.  I have no intention to apologize about an unexpected affair, it was all of my business. As Mr.Akiba said 40 years ago(one of a representative member of Futaba F3A team), any anxiety should be eliminated before the flight, if any, the flight should be refrained. Lessons by a great person revives at all.

Solex 34PICT3 in VW1302

Solex 34 PICT 3 carburetor in VW 1302 Super Beetle was re-adjusted the other day, precise positioning of throttle most closed point, fundamental mixture control, Auto-choke module positioning and idle condition in combination with the ignition timing BTDC 7.5 degree conditioning with vacuum advancer activation. Change of fuel octane from premium to regular gasoline required complete change of carburetor and distributor setting from the beginning. Smooth and powerful acceleration could be obtained after the work. Fuel mixture control with smaller screw positioning is the key to establish the work especially to know the highest rotational point and to do 30 RPM downing angular position.
All the inconvenience in the phase of acceleration from low to middle rotation was wiped out with so smooth transient property. To know, feel and discern the motor combustion condition, "Fuel is rich or lean now" is some vital point at all.

Importance of initial ignition timing

Some bad throttle response has improved into normal reaction by resetting the ignition timing at the regular BTDC angle, 7,5 degree precisely. After the change of fuel from premium to regular one, the carburetor and ignition timing are clear to be in good conditioned or not. Though it took me 3 days to seek and find out the best ignition timing and idle mixture control, I found out that anything is possible for anyone if it was attempted with some good patience. The transient of the motor form low speed to middle speed become natural and coaching phenomena and jerky motions at starting phase disappeared. Too much earlier ignition timing than BTDC 7.5 degree causes several inconveniences in the acceleration movements such as coughing, sluggish hesitation and confusion especially from low speed to middle one.

After holidays

Because of Station Development Project, new buildings are under construction, new building work had started just in front of my working place, noisy, occasional rough vibration and low frequency noise caused by big diesel motor in large heavy machinery suffer our business, not suitable for precision works. Coming across with some rare big drilling construction machinery this morning, I had a permission to take photos of them. Interesting, don't you think?

About Corona DS339MG servos, they have critical defect that would not fall flat for ordinary uses. The physical property of the case material is not adequate enough, it breaks so easily by the insulator rubber continuous tress, not applying breakable shock, naturally all the plastic stays of DS339MG servos I had exactly the same problem.
Anyway they could not be used before actual flight, how come? As the function of the servo is normal, they could be utilized in a different way of body fixing, for example, plastic tie-up band holding style with some combination of adhesive tape? Well just convenience for these equipment, 1700mm wing span high-wing model has come from my 40 years intimate friend, and it requires any motor and 3 servos, no aileron rudder and elevator only. The motor for this big yellow high-wing would be ENYA 35-4C with open locker arm constructive designing of initial production. This model airplane would be suitable for an entry to Old timer & Golden age event held every Spring and Autumn.

VW1302 thrust correction

Plus 4.780 second angle value of discrepancy on the thrust angle in VW 1302 Super Beetle was corrected today. I make much of the trust line judged from front tire outer surface see through line more than that scaled from the rear wheel surfaces following to the theory. I make it a rule to establish so to speak Positive trapezoidal figure by the 4 wheel touching points from the upper point of view. This is the key to adjust the wheel alignment in order to make the center of the human senses meet with the unwavering vehicle's steering centric position. Though I felt specific discontent in steering actions before the adjustment, I have perceived some remarkable improvement after that as usual. Piling trifles is not trifle after some period of time but it's great, this is the saying by Dr. P.K. Thomas in UCLA who is one of the greatest teacher, I owe him what I'm today. Anytime to anything the saying is alive. 

As shown in the lower picture, supporting point for rear axle is very important for 1302 type swing arm construction to the height adequately, not the hub carrier but outer arm should be supported while the adjustment. Any rotated and twisted fixing would invite lowered rear suspension like a cripple.