2018年2月19日月曜日

Wing modification completed

Modification on the Old Timer, "Begin the Begin" , has completed to prepare the moving wing, aileron. This model airplane has been designed to control rudder only originally with relatively high dihedral angle on the main wing, I changed it into higher performance model by setting aileron and reducing the dihedral angle into zero degree to give it a potentials to make F3A patterns in the sky.
Of course I know there exists an apparent discrepancy, wrong mismatching, purpose differences to make this kind of model into a stunt maneuver fighter, I dare do that to show that maneuver is possible even with this kind of slow flight high wing model with Clark Y airfoil, with big surprise by the audience.

2018年2月15日木曜日

Full-fledged modification


Extended moving wing on the main wing of "Begin the Begin" , a famous Golden age free flight model does not take effect as the aileron enough to make rolling maneuver, so I made up mind to modify it regularly, cutting some adequate area and setting the aileron as normal one has.
Dihedral angle has remade as zero degree prior, it's possible to gain the datum about the designing of aileron area. Probably, normal effect would be obtained as a matter of fact. This is because the forward movement of lift center of gravity occurs.
After this trial experiment, this B&B model would be modified to change the vertical main wing position as the low wing model by penetrating 18 mm aluminum pipe for setting the main wing of  "Sky Leaf", to know the effect of the main wing thrusting position. Much datum I wanna know would be recorded after this trial.
The power source burdened for this model airplane is OS 40 FSR with nose 50 gr weight, I might consider about some replacement, into more heavier one such as OS 46 FX obtained by chance the other day or ENYA 45 CX also obtained in Yahoo Auction at very low price, both of them has stout crank case construction leading to stable and powerful operation.
If B&B model could accept the main wing displacement, the coating film design and the shape of the main wing chip would be changed and remade.
Let's see what will happen soon.

Old Temperature Controller



I happened to bid Yahoo auction, hi-temp therm controller by chance at 2,000 yen the other day. The purpose is making use of it for US made Muffle NEY Burnout Oven with no controlling of thermometer and mooring program, probably the controller card might be broken. It looked fully mechanical controller as it did, imagined I that I could control NEY Muffle by just connecting it and also it's mechanical construction might be relatively easily understood how to do that. My own shallow and frivolous thought brought troublesome at all. First of it is huge body than expected, too big sized it is!
Second, it disappointed me so much when the service door in the front is opened, 3 pieces of glass tube containing Mercury were observed, how come, what are they for? Remembering the very specific switching system invited for the Automatic Air Force Flap in Japanese fighter while the WW2, US Code name George.
The glass cylindrical switches with mercury moving terminals are controlled by some cum construction moved by the servo motor, mechanically so complicated.
Though the construction inside is so polite and refined, it's hidden potentials are above my understanding, in spite of  tens years of manufacturing, the company is still now operating condition, am I going to ask them to share any information about this ancient temperature controller?

2018年2月11日日曜日

FUTABA 10J Charger

I have made up my mind to modify an ordinary AC adapter to meet with FUTABA 10J transmitter driven with 4 pencil type Nickel Metal Hydride batteries 4,8V. It has the capability to supply 12.35 V DC/700 mA, most of the case, 2 or 4 diodes for rectifying and 3 terminal regulator or Steiner diode and resistors for voltage regulation are included inside, but too much high voltage and current, so any modification were required to charge series connected NMH batteries safe, partial current flow and partial voltage pressure should be invited, shortening the circuitry with 17,7 orm/5W resistor guides 300mA and 10 orm /5W resistor parallel connection does 5,3V promptly.  Relatively quick charging method as this setting is, this kind of modification is worth applying to protect the battery while charging. Also, Mechanical Off Timer would be helpful to count the charging period.

2018年2月9日金曜日

Fuel tank position

The original cabin designing of Flash Pro 45 was so modified to accept fuel tank to be burdened at CG point, narrower cabin has no way to sit for the pilot. The modification is performed to prevent the movement of the CG point while the motor operation, if the fuel tank is positioned at the nearest place like just behind the bulkhead, the rate of fuel consumption affect on the CG point compared the beginning and the end half.
Anyway, the fluctuation of CG point is inconvenient for the maneuvering pilot being affected on the stabilizer's controlling feelings.
YS pressurized fuel regulating system does not require such a classic manner and custom at all, any fuel tank position will do even near the rear stabilizer, higher forced fuel pressure caused by motor crank case first pressure is not affected by any other  external disturbances. This is why I have changed the original design that is too low to accept the fuel tank just on the maximum camber of the main wing.
What is better should be done on the new construction whatever thing it may be.

2018年2月5日月曜日

At Land Transport Office in Kobe

According to aging, the opportunity to make myself excited has been reduced recently, in such a circumstance, a periodical my car inspection in every two years by the Author is only one for me. But today, my Caldina has passed the Exam without any problem with no excited scenary at Kobe Land Transport Office in Hyogo.
Thanks to my desperate effort by myself for the replacement of Motor mount parts in Caldina the other day, the riding comfort has been remarkably improved and attained like a new car, this is why I have determined to continue 15 years used AZT 241W. No emergency torch checking was done on the testing line, though I borrowed that piece for Honda Step Wagon newly obtained by my son the other day.
The Weight Tax system as a temporary measure introduced tens years ago is still now lasting with highest payment in the payment item, 34,200 yen, how come? The Authority has some tendency not to stop collection of the money once decided.
Anyway, I should continue this Caldina without any accident for 2 years from today, the life of the brush part in the Dynamometer would last more 20,000 km and that of the starter motor would do the same.

2018年2月3日土曜日

Fuselage modification of Flash Pro 45


Apparent lack of sagittal fuselage area of YOSHIOKA Flash 45 Pro obliged me to change the lower portion figure if I desire to draw a recently regulated maneuver patterns without stress. Some reduction of dihedral angle would be required as a matter of fact, probably flattened upper surface of main wing would solve the problem of rolling effect while knife-edge maneuver. Originally insufficient and poor side view as it has, the change of fuselage area would compensate not only the performance but the appearance, it would resemble with Bingo F3A model that would be build up relatively soon.
My own recent tendency of new building YOSHIOKA brand kits has deep intention to make my skill up enough to fabricate Bingo by myself. Before that, Sunday alpha 50 building might cut in, it depends on my improvement of skills to do that.