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Refreshment of TETRA Rookie 20 is completed, motor replacement from OS 32 F to ENYA SS 35 and fixed nose gear to steerable one. No movement of CG occurred as a matter of fact. Though, 35 motor might be recommended that too much for the 20 class trainer, just overpowered leading to an unable woman, F3A pattern maneuver on windy condition requires unbalanced motor power.
Probably, precise motor controlling technique might be obliged to keep stable flight.

I wanna ask to myself that do I do my works more conveniently, more quickly!
Do I make myself in a comfortably warm spring bathing?
A trifle person like me has a tendency to lead a life with eating full, oversleeping and wasting time, especially a dragonfly living in a Paradise, in Japan country with no aggressive fighting, no starving, no dangerous circumstances even in the middle of the night.
Situated in Far West US Strategy Front as Japan country is, we are keeping a peaceful daily lives here, is this phenomena brought just because of Japanese Peace Constitution? Or, because of US military air bases scattered all over Japanese land, 84 in number?
Should we Japanese nation recognize the fact and truth that the occupation by US has been long lasting since the end of WW2?
Remember that a cleared up blue sky also exists in a biggest Typhoon Core Center!

The most important requirement is often lost to modify ordinary motor to YS fuel pressurized regulating system. Orifice effect in the throat while low speed operation should be removed to obtain stable rotation.
In order to do that, lower part of throttle valve must be opened freely when drum type throttle construction is invited, otherwise YS system would not demonstrate it's performance enough. So, the throttle valve must accept some irreversible modification, no return to natural aspiration.

ENYA SS 35 was disassembled only on the front housing portion for the purpose of setting up pressure nipple, in combination with YS fuel pressure regulating system.
The bearings for main crank shaft supporting is #6901 and for front is R4A inch size promptly. The capacity of their road is adequate design for this 35 motor.
Careful scaling was performed to establish the most suitable pressure withdrawing timing, nipple position and crank shaft engraving point both are very important requirement for proper performance of the regulator, between 105 and 160 degree value ATDC is the key to success.
As for an original carburetor, 6,5 mm throat diameter is designed for the use under natural aspiration condition, but judging from an actual scaling the port gas way in the crank shaft, 7,5 mm diameter, more 1 mm wider throat wold be effective for the ultimate performance if operated under fuel pressurized condition.

Consequently, ENYA GM type carburetor with 7 mm diameter throat is invited for the upper purpose. The mechanical construction of GM carburetor makes it possible to adjust mixture as to attain the best low rotational condition not only natural aspiration but fuel pressurized conditions.
The reputation of SS 35 among the modelers is not so favorable because of narrower in take gas way in the crank shaft, but my modification would thoroughly wipe out such kind of rumor, YS fuel pressurized regulating system is the only way to do that.

Long awaited modification is not on the way on TETRA Lookie 20 trainer airplane.
Because the surface condition of flying place is flat well, fully plated with dubber mat, too much distance the airplane goes without stopping.
So, steering function on the nose gear is indispensable at all. This is why I made up my mind to apply TETRA Nose Gear S type on Lookie 20 in stead of fixed one.
The performance of OS 32 F could be understood enough in combination with YS pressurized fuel regulating system, so the motor would be exchanged into ENYA SS 35 that is light enough to meet with OS 32 F. A pressure nipple to withdraw pressures for pressure signal activating the regulator in adequate timing.
Indirect mounting mechanism should be fabricated again utilizing L shape cross section Aluminum Alloy material by myself.
These modifications are very simple as described, but they are relatively complicated and time consuming task.
It became cold outside, so now is the time to be spent for working table tasks rather than going out for flight.

We enjoyed utmost Classic Concert this evening, Ashiya Symphony Orchestra 88th Regular Concert, also ASO 50th anniversary special Concert was held at Fukushima The Symphony Hall OSAKA. And it was successfully performed as usual under the conductor Mr. Kazusi Yamashita. Additionally, beautiful vocal encore was done for the sake of the spirit of disaster in Tohoku area a few years ago, actually the made a concert tour at Ishinomaki on 3ird in November, at Sennan Art and Culture Center on 4th November, and today.
The program were followings:

Johannes Brahms
Akademische Festouvertüre c-Moll op. 80

Paul Hindemit
Symphonische Metamorphose von Themen Carl Maria von Webers
The first movement Allegro
The second movement Turandot, Scherzo Moderanto
The third movement Andantino
The forth movement Marsch

Pyotr Ilyich Tchaikovsky
Symphony No. 5 E minor work 64
The first movement Andante-Allegro con anima
The second movement Andante cantabile, con alcuna lieenza
The third movement Allegro moderato
The forth movement Finale Andante maestoso-Allegro vivace

All of the program were played well as usual in addition to the encore song and vocal.
We are longing for the next ASO Concert next Spring.