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.

TOYOTA SXE10 Altezza thrust fine correction

Fine correction of thrust angle in TOYOTA SXE10 Altezza was performed yesterday in spite of hottest weather in the pit room. The value of discrepancy was minus 43.00 second(angle), but even in such a trifle error, change of driving feel was clearly distinguished as it's often the case. There exists no specific steering habit, because any kind of habitual tendencies could be conquered and eliminated by scaling, adjusting and correcting errors in the wheel alignment and axle suspension constructive geometries. Although, writing like this easy but doing actually and establishing this is far above difficult, muscle pain inviting task with some delicacy and patience. In short, adjusting the 4 wheel touching points to form Positive trapezoidal from the upper point of view while straight running phase. The centric feeling of the driver meets with that of the vehicle after establishing upper written requirements. Description would not be recognized until the driver does a well adjusted one how ever hard I might explain here.

Astral X 60 wing correction

Bent, twisted and distorted main wing was corrected by cutting in the rib middle line like some fish cooking and re-adhered on a collecting jig, I have no experience to have obtained any fine main wing without any disadvantage in Chinese ARF kits. This HIROBO ARF kit, Astral X 60 Hi-Perf. was designed and production checked by former World Champ. Giichi Naruke and relatively expensive compared with other same class ones, critically unacceptable inconveniences in the main wing was the same as others. Even a cheap and ill-constructed model airplane, adequate collections, though troublesome and tiresome at all, makes it possible to take part in the contest with it. Hi-End contest flyers see through it's innate origin of cheep one, and naturally make little of a poor constructed(actually alignment collected), but I have enough confidence to reveal their nose to go on.

My home computer became out order at last after six years use, no booting following to that of my working place. The hard disk construction is just as same as the ancient Phonic system, some difference between them is signal reading point, the former is stylus mechanical vibration, on the other hand, the latter has LASER reflecting sensing mechanism. Writing about my experiences, most of the fracture in the hard disks were caused by abrasion on the disk surface mainly because of rotating disk main shaft supporting bearings, lack of lubrication is the reason for the inconvenience. It's very strange and quire to recognize such a primitive construction over a half century ago in the most sophisticated personal computer system at all, don't you think? Consequently, imagined I inviting Solid State Drive in mine, gave up because of the difference of capacities between them, probably next opportunity I'll do that.

By the way, most of the train passenger are gazing at small Mobile phone or Smartphone no matter how it's in the morning or evening. The scenery looks so strange to my eyes to see that most of all of Young and Old do the same, what makes them oblige to do the same, what's so interesting? Though, "No interference with the matter of others" is my way, I myself might be a strange person in the public without any terminal equipment in my pocket even a mobile phone? Once I get out of my home, I want to be free from any interferences nor disturbances without being controlled by an invisible long red string.

Solex 34PICT3 overhaul

Replacement of diaphragm valve in Solex 34 PICT 3 carburetor set on air-cooled VW 1302 Super Beetle AD Boxer motor brought remarkable better change especially while acceleration. Because, this drive feel has much to do with not only accelerating pump performance but the ignition timing advance system, the adjustment should be done in relation with this critical impact element. As the motor response reaction had made progress, a newer playing subject have to be enjoyed so much seeking the best and sweetest point of them. In the phase of critical adjustment and setting, I should prepare some cylindrical temperature scaling device, although I can know it by discerning the note of combustion, also, some improvement of transient characteristics should be established, slow to middle and middle to hi. It is true that the change of the motor performance affect on the character of the vehicle itself exactly.
I feel sorry for the drivers who does modern improved cars that is fully computerized motor control combustion, because that is previously set by the factory engineers and the area is closed by black box ECU, there is no way to change them. From a distorted point of view, they had stolen some enjoyment from the users by supplying well balanced and best adjusted motor combustion with electrically controlled modernistic system.

Solex 34PICT3 on VW1302

Gasoline smell from the engine room of VW 1302 Super Beetle obliged me to unburden and disassemble Solex 34 PICT 3 carburetor at last. To tell the truth, such kind of tendency has been recognized for relatively long time, just have I been neglecting it, but, fire with flammable and volatile organic solvent like gasoline might cause a result of irreparable, so made up my mind this afternoon to do that. All the screws were not tightened enough, this might be a reason for the smell, all the diaphragm valves and the gasket between the intake manifold were placed into prepared replacement parts. As a matter of fact, all the problems were wiped out and disappeared thoroughly. I will continue this Super Beetle at least for more two years, because the Legal Inspection has been passed 3 months ago. Fully mechanically controlled machinery like this vehicle produced over 40 years ago tells me what is the origin of the human using tool, without any power assists, power steering, power window, brake vacuum diaphragm enhancer and even without blower motor, electric motor is applied only for wiper arm movement and starter motor just 2 pieces?