Soviet Student/Universities Projects (MAI, KhAI, etc.)

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hesham said:
Hi,


here is anther drawings and a Model for Grach-4.


http://alternathistory.org.ua/proekt-selskokhozyaistvennogo-samoleta-mai-grach-4-sssr
Click to expand...

Link is down, so Archive.org: http://web.archive.org/web/20170204...skokhozyaistvennogo-samoleta-mai-grach-4-sssr

Some interesting information... apparently its structural weight was supposed to be 44% of its takeoff weight?

It seems to have also had an autopilot and possibly even fly-by-wire controls?

Btw. Does anyone have a more detailed 3-view (or larger version of the image Hesham posted)? I'm trying to work out some of the aerodynamic characteristics - but without being able to figure out more about the airfoil, wing incidence, and other details of the layout it is hard to do. A higher resolution image would help somewhat.
 
Hi Avimimus,

I think I saw 3-view to it on Internet,but where ?.
 
hesham said:
Hi Avimimus,

I think I saw 3-view to it on Internet,but where ?.
Click to expand...

The upper right hand corner of the image you posted has one. It is just low detail. Any other leads appreciated though (or a higher resolution verison).
 
The original MAI Grach-4 illustration link worked for me and I found that if you opened the illustration in a new window, you got a 1680 X 1085 large image to work with. I enlarged it on my screen and took screen snips of the drawings and have attached them.

I am also interested in the aerodynamic characteristics of the Grach-4 configuration. I build and fly flying wing models and am curious about how the downward shaped multi-segment elevator works. In most tailless aircraft, there is some part of the rear part of the wing that imparts a downward force, like a conventional horizontal tail, to balance the tendency of the forward part of the wing to pitch down.
The Grach-4 seems to have a downward shaped surface that would seem to give an upload instead of a download and would be the opposite of what works on my flying wing models. The elevator is also multi segmented and I was wondering if in level flight the segments are parallel to the flight path or slightly up to create a balancing download force.

I look forward to seeing the results of your analysis.
 

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MAI, 1958.
1. Flying jeep. Weight 1200 kilograms.
2. Heavy flying platform. Weight of transported cargo - 40 tons.
 

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borovik said:
couple of flying platforms developed under the leadership of I.Bratukhin
Reply #217 http://www.secretprojects.co.uk/forum/index.php/topic,3556.210.html
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Thank you my dear Borovik,I remembered that I saw them before,but I didn't know
where.
 
OSKBES MAI design bureau 6-seat Aviatika-950 bizjet project - ancestor of Foton design, 1994-1995.
Design by Zhidovecky, Khvan and Goryunov.
 

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Also from, Летательные аппараты МАИ
 

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flateric said:
OSKBES MAI design bureau 6-seat Aviatika-950 bizjet project - ancestor of Foton design, 1994-1995.
Design by Zhidovecky, Khvan and Goryunov.
Click to expand...
The company Aviatika had a project with different nose pieces, including for the military. Maybe this is it?
 
flateric said:
OSKBES MAI design bureau 6-seat Aviatika-950 bizjet project - ancestor of Foton design, 1994-1995.
Design by Zhidovecky, Khvan and Goryunov.
Click to expand...

You mention this as an ancestor of Foton. Out of curiosity... did it have boundary layer control at this stage in the program?
 
From L+K 5/1974,

a 3-view to Riga-50M.
 

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In 1994 the MAI published a book by J V Makarov called "Летательные аппараты МАИ " (ISBN 5-7035-0161-X). The Russian language book covered the history (aircraft engine powered boats, gliders, aircraft, submersibles, early UAV's and other equipment) from the MAI.

At the back of this, now dated, book were tables of equipment worked on and produced by the Institute. Many of the aircraft were experimental one-offs.

The first few tables covered aircraft, helicopters and gliders and are attached.
 

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A strange Info in my files,until remember the source;

MAI worked on or developed a Messerschmitt design after the WWII,can anyone confirm or deny this ?.
 
hesham said:
A strange Info in my files,until remember the source;

MAI worked on or developed a Messerschmitt design after the WWII,can anyone confirm or deny this ?.
Click to expand...
It was from Flugzeug Classic,

Messerschmitt Me 262. One of the captured machines was extensively tested in the Russian flight test center NII. A Russian one still exists today
Instruction film for handling the machine with
many aerial shots. Further copies of the 262
were analyzed in detail in MAl and ZAGl.
The plan of the direct replica was then taken
but distance. The first jet fighter of the Soviet
union, the MIG 9, was seen in an early construction
phase of the Me 262 was still similar, but then became
completely redesigned.
 

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hesham said:
Hi,


here is the MAI-407,it is a four-seat twin engined multi-purpose light aircraft
project,powered by two Rotax-912S engines.


http://www.aviaport.ru/news/2015/02/06/326043.html
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Looks like it is intended more as a trainer for pilots earning their multi-engine rating. Similar to Piper Seminole, Beechcraft Duchess, Grumman-American GA-7 Cougar and Diamond DA-42 light twins.
 
hesham said:
Also from, Летательные аппараты МАИ
Click to expand...
.3png and .2png look like attempts at toroidal biplanes where the wing tip vortices generated by the top wing are re-directed by the bottom wing. That might eliminate up to 15 percent of total drag.
 
It is doubtful that this is the MAI-405.
In 2008, there was information (Recall that the MAI-405 four-seat aircraft was planned to be created according to the scheme of a high-wing with one engine (imported). It was planned to conclude an agreement with an investor for a period of three years for the development of preliminary and technical projects, the construction of three prototypes and the certification of the aircraft, but it was not possible to conclude an agreement and these works have been suspended without financing.)
https://www.aviaport.ru/news/149303/
 
igor-mich said:
It is doubtful that this is the MAI-405. In 2008, there was information (Recall that the MAI-405 four-seat aircraft was planned to be created according to the scheme of a high-wing with one engine (imported).
Click to expand...
Although it is possible that the designation was reused, I could find no confirmation anywhere that the Aircraft 40000 (1983) and Aircraft 45000 (1984) projects were ever designated "MAI-405". I'm attaching the two PDF files which presented those projects, and you will see that nowhere is that designation ever used.
 

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Retrofit said:
Hi,

Is there more information available about the Lyakhov "Vintolet" presented in Hesham's post #2,

Thanks in advance!
Click to expand...

The text,

A sculptor by training, M.G. Lyakhov built his own airplane in 1961 in nine months, which he called "Vintolet".


The aircraft's disc-shaped wing was designed to fold like a fan, with individual sections nesting within each other. Furthermore, the disc-shaped wing was intended to ensure low landing speeds and flight stability at high angles of attack. The central section of the disc contained an annular channel in which two coaxial propellers rotated. The propellers were chain-driven by two air-cooled M-72 motorcycle engines.​

2.jpg (12598 bytes)
"Vintolet" diagram​
The wing is wooden and fabric-covered. The fabric is impregnated with a compound developed by M.G. Lyakhov himself. The compound consisted of aviation oil, drying oil, solvent, and stearin.

The ailerons were the central rotating sectors of the wing, and the tail unit was of a cruciform configuration. The aircraft's takeoff weight was 300 kg, and its length was 6 m. Its width with the folded disc wing was 2 m. With the wings folded, the "Vintolet" could move on the road like a car, thanks to its tricycle landing gear with a nose wheel. The wheels were motorcycle-type, with brakes.

TsAGI specialists, interested in M.G. Lyakhov's work, recommended making the propellers pivotable. In this case, the propellers, mounted horizontally in a ring-shaped duct, with the appropriate engine power, could provide the Vintolet with vertical takeoff and landing. Unfortunately, there is no information on whether this aircraft was ever tested.​
 
The Alfa-KM aircraft.
The machine was developed by the Design Bureau of the Moscow Aviation Institute under the designation MAI-411.The new version of the Alfa—KM machine, which is being prepared for certification at the Kizlyar Electromechanical Plant, has a weight reduced by 350 kg due to the use of composite materials.
 

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From JAWA 1998/99,

the Aviatika 960.
 

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There is no such designation "Aviatika-960". This fake has been reprinted since 1996. It seems that this reference book positions itself as a solid publication, but in fact it is full of errors. The aircraft is designated Aviatika-910 (MAI-910).
http://www.oskbes.ru/910.html
 

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