Friday 12th of August 2022

seaglider — gus leonisky contribution to saving the planet...


a carbon-neutral flying boat...


























Meanwhile see:



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moving forward...

The main trick in SeaGlider is to create slightly different pitch in the wing/sails. As the wind thus tries to topple this (a bit like the wind acting upon a free-spinning propeller), the spin in counteracted by the centreboard, the rudder and the flaps — transforming it into a forward momentum and general lifting of the craft with a significant increase in apparent wind. High precision is needed to maintain balance. This is achieved by computerised adjustments of flaps, pitch and rudder with minimum pitching and rolling of the craft, also counteracting the variable speeds of the wind. The various controls help maintain an altitude of about 5 metres above the sea surface when flat and 10 metres in waves up to 5 metres in depth, while travelling at an average cruising speed between 60 to 120 knots — only using the wind as a propellant. The craft would have to travel by "tacking" and "gybing", in order to maintain a differential suction on the wing/sail system in regard to the direction of the wind. 


It should work. 

how it works...




SEAGLIDE — a novella by Gus Leonisky...


"Good morning, this is Frank Marxzy, your captain speaking. 


Welcome aboard SeaGlider Ventus Spirituali. In a moment we will depart on our journey to New York, 3,200 nautical miles away. As you know, we cannot travel in a straight line and we will be mostly tacking. We will travel around 4,300 miles. The trip takes on average one day and 21 hours. Due to timezone differences we should be arriving in New York in time for dinner at Daniel tomorrow night. Bookings have been made on behalf of the company and transport has been arranged to your respective place of stay. 


Contrarily to what is claimed on the glossy brochure in regard to only using wind power, this craft is also equipped with a small array of high efficiency perovskite solar panels complementing our energy supplies, also used to motor-along at 50 knots till we reach the open sea. Please remain seated and make sure your seat-belt is fastened until we achieve cruising speed. Thank you."




"Welcome aboard. This is your head steward, Joseph Taphianisky… Just call me Joe. We are now cruising at 123 knots. The weather is freshening a bit and we shall reach 175 knots in about half an hour. You would have noticed how smooth the craft is gliding, due to its quantum computerised stability monitoring despite the swell being about 3.5 metres. Whenever moving along corridors or standing up make sure you hold on to one of the special secure fittings — just in case... Lunch will be served in the panoramic view dinning room in about ten minutes or at your leisure... Please make your way there, unless you have ordered prior ensuite service. Your five star chef is Pierre Dupont. Thank you."



And so started the new adventure of Georg von Ludwig Philipp on his way to the Old New world. He’d been there many times before on business trips, flying those awful jets that would get you there in six hours while destroying the planet with carbon dioxide. Then, one had to go through customs, immigration, pandemic quarantine inspections and bomb detection checks, and be robbed blind by a hire-car service in a traffic jam to nowhere. It took about 4 hours from his Frankfurt mansion till take-off at the airport 10 miles away — and about five hours in New York to his headquarters from landing at the new DonTrump AirTerminal 50 miles from the city. By now New York city was being cleaned up. Its carbon footprint had been reduced by 70 per cent — and the oil merchants and the coal barons were planning a revolution.


Retired, middle-aged and rich enough, Georg von Ludwig Philipp still enjoyed making a few deals, and chose to minimise his carbon footprint by using the SeaGlider. He had travelled directly from his home to Rotterdam in one of the fast e-copters of the SeaGlide company. Ticketing by the company made sure there were no bomb-artists, no spies and no lunatics, even rich, on board. The US authorities trusted the excellent screening of the passengers, speeding up the electronic checked transfers and providing red carpets when required. Travel by sea took more time than by air, but it was much faster though than in the days of the steamships — and at the beginnings and ends of trips... The ambiance on board was only first class and most of the other guests, despite being refined. possibly seen as snooty and ostentatious by a distant riffraff, were more than intelligent in their subjects of conversation. Physics, mathematics, politics, arts, the future and philosophy were the main subjects explored in unfathomable depths. They would indulge from time to time in games and sentimental journeys... 


As he was perusing the excellent menu, this is when Georg von Ludwig Philipp met his match — and this woman turned his brain into a monkey’s mush.


More to come… May be...


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a SG model...

As I carry on writing the rest of the Novella mentioned above, my mate, Dmitri Adams — like those Russian pseudo-engineers on Youtube — is not afraid of making badass model planes with jet engines. So in his spare time he built a model of the SeaGlider as shown at top. According to him, the project is dicey and needs a lot of precision engineering for the real thing to work. His model is 1.05 kilogram before installing the electronic control mechanisms. He thinks that 350 gram should do it, including the battery. But at this scale the stability cannot be sustained manually (by remote control).

As well, the ratio of wing areas versus centreboard wetted surface is critical. His estimates is that the real thing won't take off, until a speed of 45 knots is reached. Although the shape and surfaces are scalable, performance is not. For the model to work he thinks its speed has to be about three times more in proportion than that of the real thing. Only testing can help find out. He says the model has to be towed to about 15 knots before take off. Then managing the rudder, the flaps, the wing angles, the depth of the centreboard becomes a massive problem in real time, that only a computer can manage, especially in fluky winds. 

At speed approaching 200 knots (the full size SG), the centreboard could start to supercavitate and God knows what could happen to the direction and stability. God? (Dmitri is a lapse believer).

Anyway, thanks for trying... I have composed a picture of Dmitri's model. I will post his plans soon.




SC modelSC model



the plan...



This is the first ROUGH PLAN with a bit more info from my friend, Dmitri Adams... Most NEW transport ideas available anywhere at the moment involve using "engines" — albeit economic ones. The SEAGLIDER is the only one that needs NO POWER TO FLY in the wind. The only times the engines (jet/electric) are used is to approach jetties and harbours. These engines work on recharged batteries from a couple of wind turbines and two sets of LIGHTWEIGHT flexible solar panels placed on part of the wings. The wing profile is the standard profile for low speed aircraft (250/350 kms/h). 


500 kgs of batteries

7000 kgs passengers and crew including luggage

3000 kgs luxuries and supplies (food)

4500 kgs water recycling (electric) and storage

3000 waste storage.

40-54 tonnes of carbon fibre composite.

400 kgs kevlar/similar for part of wings

500kgs engines and turbines.

100kgs emergency generator.

1000 kgs, life jackets and inflatables.

400 kgs of hydraulics


IT SHOULD WORK. AMAZINGLY. The four GPS (one at the front, one at the back, one on each wing tips, plus a gyroscope connected to a computer controlling flaps, wing angles, centreboard and short foils would prevent pitch and roll... Expected speed 150 to 200 kms/h in 20 knot breeze.


Read from top.