PILOT Ace Type B

Also PILOT Ace Type B is now under construction, that is the second generation of Ace series, cutting out of its fuselage is over and the stabilizer is almost fabricated.
Power source is an old designed ENYA 29 4B with plane crank shaft bearing, lighter one, I'm released from troublesome ball bearing maintenance. As I have never seen this motor actually under some perfect condition in the field, I dare choose this one in spite of heavier weight compared with recent high performance Shinyure scavenging lighter motors, must I pay attention on CG. Thanks to good covering film material, ORACOVER, I can proceed this kind of work freely without any stress like by Organic Solvent, Acetone.
I'm going to make use of the main wing of  TETRA ROOKIE 20 that has supreme performance with Laminar Airfoil designed by Mr. Tangiku, over 45 years ago had I some precious opportunity to fly and to enjoy Hinode Lead multi channel Radio model airplane with him at Muko Riverside in Hyogo Prefecture.

MK Star 15 & 60 motor

MK Star 15 designed by Masahiro Kato over 50 years ago is now under construction. As it isn't done from a kit but from pieces of balsa, it takes time and requires much effort. 80 % finished already, but not a few small works remain, I'm sure that it would come in time to next  Old Timer & Golden Age meeting held in coming Spring. For the power source of this model airplane, ENYA 20 with conventional cross flow scavenge would be invited, suitable or less power, probably, in case of poor power for stunt flight, OS 25LA would replace, it depends on the finished weight.

As OS 60 FSR motor appeared in Yahoo Auction I bid only at 520 yen like nothing, actually it was sold as a junk motor. After arriving to me, I knew the reason why it was sold at so lowest price, the carburetor holding screw 3,5mm hole was dead showing at the point in the picture. The former owner had bad habbit to screw in too tight all the screws even on back cover plate. All of them were loosened with heating method. Braking tightening power must have destroyed 3,5mm screw hole. Re-tapping with 4mm tools could recover the problem safe.
Crank shaft supporting front bearing was ill set, rear seal cover had not been removed and original bearing grease was left untouched. He did not understand the physical property of lubrication, just like a layman. It was lucky that the crank bearings on both side, front and rear could be usable after cleaning. Gas compression construction was not damaged.
Any way, it survived as a useful enough motor after full overhaul including carburetor.