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Jun 17, 2019, 02:07 PM
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Сергей Сергеевич , с Цесной 2019г. (7 min 28 sec)
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Jun 20, 2019, 09:21 PM
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Nice! Thanks for sharing!
Jun 21, 2019, 12:12 PM
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Gathered extra keel for hydro option.











Added 40 photos Cessna 150.
Jul 04, 2019, 03:58 PM
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Vystrugal cog 20X7X5 double pitch, at the root of 7 at the tip of 5 inches.
If in Russian 508Х177Х127 mm.
The goal was to reduce thrust-weight at low revs and reduce flight speed.
Prior to that, he flew Mezhlik 20x10, naturally first took readings, received these values ​​(statically)
Mezhlik 20Х10 - 7300 about \ min - 10300 gr.
Nazin 20Х7 - 7800 rpm; 11000 g.
By flying the difference honestly did not feel
apparently flying not on those modes where you can figure out the difference: D
 


Land operations and tuning are completed,
which side to approach the transmitter remembered
now we cook for water.
Initial pressure tests immediately yielded first results.



It turned out one leak from under the nuts mounting the rear crossbar
(at the time of testing, I plugged it with a screw with a fumlenta winding)



Then it turned out that the hermetic partition between the nasal and middle compartments is not at all hermetic.
Moreover, the blue ball was blown away and with its pressure it inflated the brown ball, eventually blowing off but continuing to stand under total pressure.



Left for the night, tomorrow I will check whether everything will stand
Jul 10, 2019, 08:16 AM
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Final complete assembly, I find out what is centered and weigh before flying.





















Now let's calculate what's with the weight.
The chassis that I took out weigh 993gr.
The model on the chassis weighed 8.11kg.
It turns out the floats weigh 4kg.

I estimated centering, went a little bit back.
By selection, I found out to return the centering,
need to load 150g to the nose.

As a result, the weight of an empty model will be approximately 11.3kg
Estimated maximum take-off weight 12kg.
It means it was within the specified parameters.
Jul 26, 2019, 02:19 AM
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Greetings friends!
Finally it happened!
Cessna took off from the water!
It happened on Wednesday evening.







irst of all, I want to express my gratitude to everyone who helped me in this project.
Mikhail Nikitin - a medal for courage! He was always there, ready to listen and prompt.
Not a lot of help I received on the forums, thanks to everyone who participated.
I will separately note Sergey Gritsenko and Alexey Kirgintsev, the advice of these pilots turned out to be very valuable.

Tests were held on the Volga river, in Engels, on the embankment.
Debarcader sports school rowing.

This video was filmed by my wife Irina.

Faster Wind - Cessna 152 гидросамолет. (18 min 56 sec)


These videos are from Denis Korotkov.

Испытание на плавучесть. Сергей Назин, про&#1 (5 min 55 sec)


Ходовые испытания. Сергей Назин, Михаил Ни&#1 (8 min 19 sec)


Облет модели Цесны на поплавках. 120 тыс. рубл&#107 (5 min 42 sec)


Второй полет с конвеером, и испытание на пр&# (5 min 50 sec)


A little later, I will describe in more detail everything I learned new from these tests,
I need to collect your thoughts, and the last three days are very busy for work.
Jul 26, 2019, 05:25 AM
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Congratulations. Very well done - impressive.
Jul 27, 2019, 01:26 AM
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I will begin the story in chronological order of the first video.

Launched.
Impressions are pleasant, it stands smoothly, steadily,
waterline is even slightly lower than I expected.
I recall that the calculated maximum take-off weight on the floats was 12kg.
I think that this parameter should not be exceeded, well, a maximum of 14kg on these floats can be set.
I inspected the racks and braces, everything seems to be held tight, there are no backlashes.
There was a problem with the right steering bowdenom, broke under the hood, I had to remove the hood.
It turned out the mount was not tightened, the right wheel was wedged in the left position.
It's good that this snot got out on the bridge before takeoff

The first attempt to walk on water.
This is when I swam
At that moment I learned what a current is!
As it turned out, the flow of the river creates a strong moment on the floats,
the current is trying to turn the floats down the river.
It turns out the following -
if you go with the flow, turn 180gr is not difficult.
But if you go against the stream, when you try to turn around,
the model rises at an angle to the flow and continues to move forward with sliding.
So, in an attempt to turn left, I abruptly shifted the rudders to the right, and "oh miracle" the model turned around.
As if gaining inertia in turn, she had enough energy to cross the current.
Of course, the current feels that way at a slow speed, if you gain a little speed, it is controlled as it should.

Acceleration, exit to gliding.
I do not remember how the property of water is called correctly
At idle, the model does not stand on the chassis, there is no resistance whatsoever.
But if you give gas from the spot, rather, the whole model is screwed into the water,
when set, the floats create tremendous resistance and, as a consequence, a dive moment.
This difference is so noticeable to me, the run comes out long,
the speed has to be gained slowly, adding engine speed gradually.
On the planing mode, the model goes confidently, stably, the water holds well.
I think on the lake, without current and without wind, it will be possible to drive as on a boat.
This time I was afraid to change course and kept strictly against the wind and against the current.

Takeoff.
The separation from the water is predictable and soft.
I was most afraid of some unpredictable moments, but they were not there.
The speed at break is high, the model goes confidently, it comes off smoothly.
The first take-off did without flaps, the second take-off with flaps.
With flaps, too, everything gently took off

Flight.
In general, the change in weight was felt, the speed of horizontal flight increased.
And the increase in drag also felt
the model flies confidently and steadily, but now in 3/4 of the engine's gas, it flew to the chassis with 1/2 of the gas.
The tightness is enough, checked on the loops, pulls up with excess.
In the bend is stable, problems with the withdrawal of the course or even any side effects are not noticed.

Landing.
On landing, of course, the plane also changed.
It decreases quickly, you need to keep the speed, and make a good exposure before touching.
The first landing turned out right, I saw the water well and did everything right.
The next two landings took place already against the sun, because the sun was setting at sunset rather quickly.

That evening, three take-offs and three landings were made.
Floats of water are not scored
Now I'm looking for where to fly without spectators, safe for others
And I will look for a lake without current.
Thanks for attention.
Aug 03, 2019, 05:36 PM
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2.7 Meter Cessna 152 looks very good
we built 2.45 meter 10 years ago, and similar size 3 x Cessna 206 demo built, all flying very well, did not further develop 98" Cessna 206, the reason is, for the hobby market, it was conflict with 96" Cessna 152.

we still have the scale seats for the Cessna , if need, let us know

Team Austars
Aug 16, 2019, 01:47 AM
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Yesterday’s weather is the dream of any pilot.
Warm, light, calm.
I went flying to the Blue Lake, not far from the city.
The pond is 450X250 meters (judging by maps), there are no tall trees on the banks.
The lack of current and wind made it possible to feel the model on the water.
As I expected, it handles very well, a 180g turn around the tip almost as if it were straight on the chassis.
Without water rudders, it is also controlled, the rudder of course works, but the turning radius is not the same.
He rolled enough, about 1/4 of the gas, when he goes to the glider (i didn’t lift the rudders), drives like a boat
behaves predictably at speed, floats hold on to water very well, rolled out a whole tank dissecting through a pond.













In flight, everything is the same, confidently, but of course, significantly heavier than on the chassis.
The speed of horizontal flight has clearly increased, for which it decreases noticeably better on landing, it has become easier to land.
The video was shot by the spouse, for which special thanks to her

Faster Wind - Cessna 152 на голубом озере. (15 min 3 sec)


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