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Everything posted by Ras Ambrioso
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Nothing better that hear from experts. When I was assembling the two halves of the spoked rims I looked for any markings that would have been included tor the correct assembly. I didn't see any, so I proceeded to eyeballing the setup. If I was making this model for sale or museums, I would unmount the wheels, unscrew the rims (5 mini screws) and rotate the rim one hole. But, I am going to let this go as is. If you look closely at the overall assembly you will find a bunch of "oops". Building this model has been frustrating, tedious and incredible difficult considering my shaking fingers, bad sight and lack of five hands. But I have loved every minute of it and enjoyed sharing my experiences with the forum.
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Amazing work. I smile when I think of your tolerance of 0.008 mm when mine is about 0.500mm. Its a real pleasure to look at your work.
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Finally, after three days of work, (a total of 10 hrs, really), the first wheel is done. To set the tire in the rim I had to recall my experiences as a teenager removing car tires off their rims to fix the flats. Working part time in a garage, the only tool available was a steel bar and a hammer. Here I had to use very small screw driver to open up the tire an let it slip on the edge of the rim. As everything else in this build, a very frustrating experience. But I loved every minute of it. After a wait of over 30 years I, finally get to see this kit nearing its completion. Notice the detail on the tire itself: Pirelli. And this is how the Bianchi looks now.
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Well, the day came that I had to start assembling the spoke wheels. I have dreaded this moment since I had failed before in my attempts to build this kit back in the 90's. At that time, I started with the wheels and got totally frustrated and abandoned the project. Now, that I am older, I think that have gained some patience and perseverance to deal with failures. I purchased this kit used. It seems that the previous owner had started the wheels and had fabricated the 80 spokes necessary and then quit. So, for the start, I checked the spokes he (or she?) had cut and bend. Horror 🤪, The spokes were bent wrong. So, the first job was to verify the size (two different lengths were required) and the bends. Each wheel has two rims and two hubs to which these spokes are to be inserted. That done, I proceeded, as per the instructions, to thread the spokes into the hubs. This was a little complicated as the spokes are feed alternately on the hub holes: half up and half down. Then another crisis developed. The instructions indicated that the spokes would be lined up as per the diagram and then placed on the corresponding slots in the rims (#47 and #48 below). A tape, with adhesive in one side, was provided to spread and hold the spokes (see #44 and #46 above), but the pattern in #46 is not to scale and therefore useless. I scratched my head several times and decided that I needed something to hold each spoke in its slot (unglued) while I located the others and placed them in the rim. The answer was using modeling clay to hold each spoke in place. Success🙂 And here are the results. And, to make it more interesting, I assembled the second half of the rim's hub backwards. I had to submerge the rim with the spokes in acetone to remove the CA glue. But there is a happy ending to the story. The challenge continues........
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A little more progress as I tackle the piping and wiring. The mystery of the little tank on top of the fuel tanks is resolved. The tank is an oil reserve tank and is piped back to the main oil tanks. This tank actually feeds two oil pumps which feed the DOHC and the crankcase. As you can see it is difficult to see the details on the lower part of the engine due to the glossy black paint. I am thinking about using a thin grey wash over it . What do the forum think about it? And finally the seat came out OK. I tested several solvents and found that acetone did the job. Still got a little more of the cabling to do but I think I will build the wheels before I install the handlebars, which are already done. Thanks for following, your advise is very valuable to me.
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Keith, I followed your recommendation and painted some of the rubber spruces. I also cut pieces of the rubber and used acetone, lacker thinner, and mineral spirits. The paint got sticky but the rubber was not affected by any of the solvents. Then I painted another piece of the rubber with acrylic paint and it stuck and dried solid. So my next step is to try to clean the seat with one of the solvents and paint it with acrylic paint. Hopefully it will work. In the meantime I tackled the seat frame. This one has four really small springs (see post #28) and I had a hell of time trying to open the ends of these springs that are 1.0mm diameter. Finally I figured a way by threading a fine wire through the spring and wrapping the ends in the seat holes. And the final product: Added a few more details to the engine including the main drive chain and the magneto drive. I painted the the whole engine in black but, in retrospect, I should have followed the color scheme in the kit box (grey bottom and black top) to make some of the details more visible. This is an outstanding kit. Next challenge is fabricating the spoke wheels and installing the handlebars and the seat. Then complete this project with the the piping and cabling of the engine.
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The spokes are the real challenge, they have to be fabricated. I did these on the the first kit back in the 90's. Took me a long time and I lost interest in the model. This time, I have left the wheels for last and I am determined to finish this project. Following are the instructions for the fabrication of the wheels. On the good side is that previous kit owner had already fabricated the 80 spokes and hopefully he did a fair job on them. I am still trying to understand the sequence of assembly using the sticky templates. I have looked at many spoke wheel fabrications on Pinterest but most of them had different rims and also used monofilament line for the spokes. Its going to be fun🤔🤔 For the saga of the leather seat I want to show you how good the paint looks in the rubber seat. Unfortunately is very sticky. Thanks for watching.
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Guys , I need you help again. The seat for this bike is a rubber like material and it has the surface molded to imitate leather. Looking at Kim's (refer to Post #44) I figured that a brown leather color really looked good and proceeded to spray the seat with brown (rattle can) paint. Horror 🤯 (again). Its been three days since the spray and the paint has not dried yet. My thought now is to use paint thinner and try to remove the leather color and live with the original black color. Do you have any ideas about the use of paint over rubber?
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Holy cow, it seems that I woke up the bees. Very interesting arguments. At the beginning of this thread I said that I thought it was oil to the OHCS and I tend to stick to it and I will ignore the instructions (Oh my!) agreeing with Shipman and Egilman. However the drop oil feed to the chain is coming from the crankcase from a pipe and valve on the left side of the bike. The fact is that, if you look closely at the right side sketch, the oil system is kind of weird. I appreciate you comments and value your opinions and, for that , I thank you all.
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This what I enjoy this forum. After reading your responses I believe the little tank serves as a reserve tank. The engine is a four stroke and, if you look at the photos below, you will see that the oil pump feeds the OHCS and that the tank feed the carburetor. Thanks a lot for your likes and responses. Like I said before this is a complicated build.
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I have been scratching my head about the little blue tank on top of the gas tank. I have thought that it was part of an oil drop lubrication system. But, today, I looked again at the piping diagram in the instructions and saw that the hose from this tank was going directly to the carburetor. Then I remembered that, in my engineering days, I did a project in Venezuela building an MTBE plant in one of their refineries. MTBE was used as an additive to gasoline to improve the octane which is adding oxygen to the fuel. This chemical was popular for a time( the 70's) but was a dangerous and expensive process and it was substituted by ethanol, not as effective but much cheaper and abundant. I can imagine that during the 20's racers were always looking how to improve the efficiency of their machines and used these kind of additives. So, I think that little blue tank was feeding some additive to the combustion to improve the performance of the engine. Also, since I already increased compression by reducing the cylinder height, I am sure that the bike could really use another little boost and Freccia Celeste will be as fast as a "bat out of hell. LOL😂😂😂 Any comments?
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