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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New small boat tests

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So, let’s talk about the tests of my new small airboat, which is practically a copy of the previous one, built last year, but slightly reduced by half in order to get into the limit of ships that do not need a license and registration. Corsair with 21 horsepower, which was more powerful than the previous 7-horsepower engine. The newspaper has taken off. A powerful start and acceleration almost instantly to 45 km per hour and then everything I have is up to about 47 km at a time. I think all the fault is in the propeller. Cannot work efficiently at speed. You just need to replace the propeller that you need to buy. The speed of fifty kilometers per hour for this boat is very decent and quite enough, so you can safely chase rivers and lakes. Okay, I realized that, now about ekranoplan.

I have already remade the frame, and it has slightly changed to 25 degrees relative to the surface of the water. In short, very cool. I think it should be somehow different, since part of the flow is passed over the wing. I hope that everything will be in force, and all boats will be delivered from the water. Next week we move on to boat assembly and testing. Yes, and yet both motors are out of order. The ignition system just crumbled. 10 years ago in a garage where there is all the wiring crumbled, the spark disappeared and the starter does not turn. In short there is something to do at your leisure. As usual, the photos below.

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First tests of ekranoplan

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The first tests of ekranoplan made. For the first time, fine, I think. The steering is working. The boat is not leaking. The motor has little power for this boat. The rear wing has a large lifting force and therefore presses the nose and does not allow the boat to accelerate. Perhaps if there was more power it would be pulled. I don’t know, I need to try different options. While I calmed down. I don’t have a powerful motor, which means that you can do airboats. I will rearrange the engine to a new aero boat and arrange races. now I have two airliners and two motors for my small boats will be just right, and the winged aircraft needs to be improved and a new engine. And in general, to come with him to the lake is a very big problem. Three bulky parts need to be assembled and taken by bus and then collected and adjusted for two hours. Very hard. For such tests, you need a base near the water and some free funds, then things will go faster. Yes, and I forgot to say, I was flooded with water from spray from head to toe. And the propeller hit the water. I don’t know when the next time I will take this green monster to the test, but so far I’m satisfied.

Special thanks to my friends Karlis, Tom and Roland for their help at an important moment.

First test

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So, I went to the lake and tested a boat with a motor in front. It must be said that the boat turned out to be heavy and the three of us had to drag it. Even the motor did not work correctly, absolutely did not want to go to full speed, although I drove it for repair and they assured me that everything was ok. At first the cord to start the engine was torn, changed it, then the carburetor fell off and rested on one bolt, of course, the motor stalled immediately. Screwed the carburetor. The power still did not reach its full potential and I had to quietly drive back and forth near the coast. But, nevertheless, I managed to understand something. And the first is that the steering wheel works fine. With this arrangement, the boat remains stable and maneuverable. The windshield needs more. But for now, I don’t think that I will continue to work on this boat, because we have the ekranoplan on the line and we need to concentrate all our efforts on it, but for now enjoy photos and videos from the tests.

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