Topic: Classic F3A

Great Planes Super Kaos 60

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I’ve been fortunate enough to get my hands on a classic Great Planes Super Kaos 60 kit, new in box, from the early 1980s. Top condition. After it had been maturing like a fine wine for a year or so I could not resist it any longer. I’m knee-deep in building it, and as usual I’m posting all the build photos on my Flickr page, you can see them all here. 

It will be powered by a restored O.S .61 FSR ABC, and guided by Futaba S-3151 and S-3152 servos and a Futaba 14SG Radio with a new FASSTest receiver. It will be simple and basic with fixed gear an Oracover finish.

Tiger Fli Project – Done!

Tiger Fli
Done! Well, almost. The wing mounting is fastened with four nylon bolts, two for each half. And because of the pushrods going to the tail I can’t reach the ones at the back. I have to modify it to make it more user friendly with a pin or screw to lock it in place, before I can fly it. But it looks like I wanted it to, it balanced perfectly, and hopefully it’ll still fly like the classic Tiger 2 does. More pictures in the Flickr album.

Yoshioka Aladdin update

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The wonderfully strange Yoshioka Aladdin 45L that I built in the autumn of 2012 has finally flown, after hanging on my wall for almost three years (That’s what family life can do to ones hobby). The first flight was highly successful. After some trimming, it flew hands off straight and level. The engine, an old but well looked after YS .63 FZ ran rich but did not stop. It has ample power, it’s not a rocket, but it pulls it along with enthusiasm. The sight of the sleek plane with the fourstroke sound was very strange. It looks like a pattern plane and sounds like a scale model.

The Aladdin has a very strange feature, an offset engine installation. It is explained in the poorly translated Japanese instructions that mounting the engine like this does not require any right thrust. It looks very odd, and gives the plane its trademark appearance. See here:
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Offset! It’s mounted 90 degrees to the models centreline. The benefit, apart from the obvious fact that the engine and muffler are almost completely buried in the cowling and not hanging out the side, is that right thrust will vary with engine RPM, and this setup will not. I have just the one flight, but I could see no apparent problems in the air, it certainly flew straight enough. Perhaps it really does work? But if so, why haven’t others done the same? Comments?

Here are the build photos.

Killer Kaos flies (restomod part 5)

2015-08-05 21.37.44

The O.S engine gave me a little headache. I ran it at home a little bit, and it ran strong and started like any O.S motor should, i.e. with a light flip of the prop. It tached 10.000 rpm on the APC 11×12 and idled smoothly. All was well and then I tried holding the nose up, and it leaned out badly. A lot of tweaking later, I was unable to fix it. I re-did the fuel plumbing and moved the tank a lot further forward and hoped that would solve it. It may have been optimistic having the tank as far back as I did without using a pump or header tank.

On the field yesterday I had exactly the same problems. I switched from an O.S 8 plug to an OS F, and that did nothing. I tried a smaller prop, an 11×9, and that helped a bit. I then tuned it some more and eventually it ran strong. I had one flight where I landed early because I could hear it leaning out a bit in loops, tuned more, and then suddenly it ran like nothing else mattered, not missing a beat going up, down, sideways or anything. Success! The third flight was suddenly bad again, leaning out. Landed in a hurry, tuned, and suddenly it ran great again.

I have a successful track record of making stubborn engines run good, and I don’t intend to let this one beat me. I suspect the pipe is slightly too long, and I think shortening it might do the trick. I will also try an 11×10 to load it up just a bit more.

The plane flew just like you’d expect. I had some wild deja vu’s while flying. I have lots of flights on the old version of it, so it behaved as I remembered, which is a strange sensation when I was mentally prepared for a maiden flight! I was also surprised at how well behaved it was on takeoff and landing, and how well it tracked straight and level. It has no vices whatsoever.

Here’s a before/after photo, with at least 13 years between the two:

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All the pictures from the project can be found here:
https://www.flickr.com/photos/aerowold/sets/72157651018400942

The restomod project blogposts:
Restomod part 1
Restomod part 2
Restomod part 3
Restomod part 4