New boat

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Autumn is in full swing and all boats are laid up. The ekranoplan is disassembled and the motor is removed. With God’s help, I have mastered all my affairs planned for the past summer, but what now? The ekranoplan lost its engine and if there are no changes, then I think further experiments with it will be suspended. What I wanted I managed to do and my conscience is clear, but there can be no talk of further project development without significant finances. Therefore, while everything is frozen and I move on to my other idea that I can implement with the means that I have. So, what’s next, and then remember, if anyone is following my work, I had a project with an airboat to which I attached a cockpit from a flying trike project and put the motor in front with a pulling propeller. Then I felt the idea was very good for aviation and as I like in the spirit of 1920-30 moves of the twentieth century. I comprehended that product of mine and decided to continue in that direction. That is, the boating and aviation theme. Aerolodka, but more graceful with beautiful old-school contours to make it pleasant to look at and ride. I scoured the entire Internet in search of ready-made free drawings of boats of that era so beloved by me. And what I found for myself. This is a 1941 boat called Dragonfly designed and built by Engineer William Jack. This is a seaplane 3 meters long with an oval nose and vintage contours in the back, it has two floats, apparently to facilitate getting to the glider, but taking the general concept of the boat, I altered the rear part by removing these floats and made a solid bottom because the boat will not have an outboard motor but my paramotor with a propeller and therefore had to be redesigned at the back and also in the front I will leave room for one more passenger seat so the nose will not be completely sewn up. I will make it a beautiful aluminum tail, paint the bottom and sides with either green or white paint and cover the deck with clear varnish to emphasize its wooden nature. I think I will get a beautiful boat, I really want to make it as soon as possible. At the moment I have already made all the frames and glued the keel and sides, now I am working on the upper part of the boat and I hope to paste over the deck next week and only then turn it over and take up the bottom. Work is going on soon all weekend I spend in the workshop, so I hope to finish all the rough work by the new year. In the meantime, the photos and drawings are below.

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The final test of the ekranoplan on the water in the 2020 season

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I’ll be brief. I finished with the ekranoplan. The water tests went well and now I have to return the motor to its owner, disassemble the boat and put it in a corner for the time being. This time everything was very fast. The weather was good, I quickly assembled the boat, sat at the helm and started off. With the Polini Thor 250, the boat immediately jumped into the water and glided along the surface. The front wing is always in the air at a speed of 35-40 km / h, the rear wing is also in the air and the boat is held by the water only with rubber strips that I screwed on before the last test. In general, at a speed of 50 km per hour, the boat flies very confidently, but at some point (I want to note that not always) the boat begins to sway and longitudinal instability arises. The first thought that came to my mind was that because the wings were too close to each other, it would be possible to lengthen the hull, or install a horizontal stabilizer to balance the boat in flight. I would also like to redo the motor mount again and reduce the motor angle by five degrees, plus raise it a little higher. Finally, you need to slightly reduce the angle of attack of the front wing by a few degrees. But this is all another time, I was exhausted during this season, there were so many alterations and visits. It is both physically and mentally difficult for one person to do more. Therefore, with a light heart, I postpone this project until modern times, what I wanted to do – lifted my boat into the air. Made my own small ekranoplan. Though not high, it flies. And it is also well managed. I didn’t make any extreme reversals so that some accident didn’t happen. Since the motor is not mine and I didn’t want to get a few thousand euros. Having made three high-speed races on the lake, I understood everything for myself and quickly disassembled the boat, washed off the lake until no one woke up in the vicinity. So now I am satisfied and can calmly engage in other projects that I am already doing in parallel. These will also be motor boats. One will be a two-seater motor boat which I am going to make according to the drawings of 1960 and the second one is a single-seat speedboat according to the drawings of 1941 which I am going to convert into an airboat with aviation styling. So what’s next is more. The video is as usual below.

Test with Polini Thor engine

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Polini Thor 250. This engine is what I need! I finally tried it out today. The propeller that I ordered a month ago came and this morning I tied the ekranoplan to the boxes at the entrance to the hangar where I work and started the engine. On the model, I already tested the method of binding the ekranoplan, so I knew how and in what places to bind it so that it could stand symmetrically in the air stream. In short, everything worked out for me. The boat flew up and stayed in the air while I held full throttle. I think that on the water I will give full throttle and immediately jump out of the water, and as the speed increases, I will slow down the throttle and get the right flight. I would very much like the rear wing to work correctly and the flight would turn out to be horizontally even, and not with a raised nose. The model flew smoothly and so far everything worked out just like on the model, so there is no reason to worry about the fact that the full-size device will carry itself any differently. It remains to wait for the weather and go to the water. Video from the tests below.

New engine for the ekranoplan

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Everything is ready for the third test of the ekranoplan. True, autumn has come and the weather has deteriorated a lot, but still there is hope to go out on the water in September. In the meantime, I’ll tell you about what I managed to do. After the second test on the water, I realized that there was not enough power and for full satisfaction this season I need to drive the car again, but with more power. I figured out where I can get the engine. There were few options. The first is to sell what I have, to save up a little and buy the engine I need. And I need a Polini Thor 250 with a capacity of 36 horsepower and a thrust of one hundred kilograms. The weight of the engine is small, only 18 kg, but it is already liquid-cooled. In general, I will not be able to sell anything quickly, especially in a crisis that unexpectedly hit us with this virus, so I remembered who had such an engine and friends of paragliders. And I remembered that my old friend Alexander bought such an engine 3 years ago to build a trike. I turned to him with a request to provide me with the engine for testing. He calmly said – take it, test it but don’t drown it! If anything, you will have to reimburse the cost of the motor, which is 2500 euros. I understand that I am taking a risk, but still I took the motor because I want to find out how the ekranoplan will behave when the power increases to the calculated one. In general, with this engine, I am already approaching the border at which the boat may begin to “levitate”. He brought the engine to the workshop and, having remade the engine mount, installed it. Everything became as it should. He handed the jammer button and the engine crank rope into the cockpit. The only thing I don’t have yet is the propeller. I need a pulling one and I have already ordered it from the Skyruner company from Pskov. They sent it to me a couple of weeks ago, but it hasn’t arrived yet. The Russian Post prepared the goods for shipment and took them to the border, and this is already 10 days ago. No more news yet. I hope it will come before the cold weather. At least test it on concrete in the hangar, I want to fix the boat and drive the motor. I also redid the front tail – I increased its area and screwed rubber along the sides so that you could crawl ashore and test on the asphalt without fear of erasing the bottom to the plywood. Here is the news. Photo as usual below.

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Airboat. The second test on the water

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So, briefly about the last test of the ekranoplan. The alteration turned out to be correct and the engine began to blow at the correct angle under the wing, which resulted in sufficient lift. In reality, if there were a dozen more horsepower in stock, or better, twenty, then the boat, like the model, would take off like a bullet and fly forward ten centimetres from the water. It’s amazing how a large boat, modeled after a small model, behaves the same way. We need more motor. There was a desire to put back the little motor I had left to add power, but I don’t know yet. The motor is very unreliable, and coming to the test is a whole test. You need to adjust the weather, you need to come to an agreement with a Friend who has a house on the shore of the lake within the city of Riga so easy to drive up to the water. You need to beg for a minibus at work and so that on a working day, because on weekends the lake is full of fishermen and in our business it is a hindrance and you need to have the time and energy to carry and assemble the boat from parts. And when things go wrong, it’s incredibly demoralizing. This summer I made only 4 trips to the water and was so exhausted with all the hassle that I decided to take a break before the time. As for the ekranoplan, a lot became clear to me, I know what work needs to be done. Silence about boats. We need a new propeller for the motor to accelerate the boat faster. I also think to put an ordinary 6 horsepower outboard motor on one of the boats and try to overclock it. And in the off-season, in addition to the modifications of the ekranoplan, I decided to build a new boat. Just taking a ride on the airboat with a motor in front, I experienced the unforgettable sensation of feeling like a fighter pilot and decided to make a more elegant boat based on this model. I have an old book from 1961 called boating. and there is a drawing of a sharp-nosed light planing boat and taking it as a basis as a base so as not to invent anything I will build an aero boat with a motor in front with a beautiful closed cockpit like on seaplanes of the Schneider trophy era. I use the engine that is on the ekranoplan and for the ekranoplan I hope to get hold of something more powerful. Photos and video of ekranoplan tests below and preliminary drawings of the next boat are also in the bargain.

 

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