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Mijelson / Nikitin PT/PSN Valk
 
 Mijelson-PT-01
PT
 
Starting in 1933, a series of projects began to be developed in the USSR under the common name of PSN, acronym for P laner S petsialnovo N aznachenya or Gliders for Special Missions. Among these projects was SF Valk's idea of ​​using a glider with a torpedo and an infrared or radio guidance system to attack surface ships and naval bases.
 
This idea had its development in a series of projects known as:
LTDD - Letayushaya Torpeda Dalnevo Dieztvya (Long Range Flying Torpedo);
DPT - Dalni Planerni Torpedo (Long Range Glider Torpedo);
BMP - Bozduzhni Minni Planer (Airborne Mine Glider);
 
As a development of this conception, Mijelson would receive the task of building an experimental manned hydrofoil glider capable of carrying a torpedo and intended primarily to test remote flight control systems. This glider, called PT, was followed by a small series of copies that received the name PSN (Russian: Михельсон / Никитин ПСН).
 
The PSN was designed as a small single-seater hydrofoil glider with stabilization floats located approximately halfway across the wingspan of each half plane. The entire construction was made of wood.
 
The wings presented high implantation with a trapezoidal shape in the plane. Louvered ailerons and flaps were included as control surfaces. The tail unit featured the outriggers braced by double struts high on the keel.
 
The pilot was located in a glass cockpit in front of the wing leading edge. At the bottom of the glider was fixed a torpedo.
The PSN was carried by a Túpolev TB-3 or TB-7 mother bomber and was released at a pre-calculated height and distances between 30 and 50 km from the target. After launching its torpedo, the glider would land on the water.
 
 Mijelson-PT-02
A PSN hydrofoil glider with a torpedo under the wing of the Túpolev TB-3 mother plane.
 
In 1934 the first PT copies and their equipment were built and tested. The first 4 units were built in 1935 at factory No. 23 in Leningrad. In this case, it was a piloted glider version designed to evaluate the infrared guidance piloting system known as Kvant (Quanto). This project was developed under the direction of Mijelson and Nikitin was in charge of the production.
 
 Mijelson-PT-03
Two PT gliders during the water tests.
 
From June until October of August of 1936 at the Naval base Krechevits the first fixation tests PT were performed under a bomber Tupolev TB-3. During these tests the PT was piloted by N N. Ivanov.
 
Between 1937 and 1938 the construction of a small series of PT without a pilot was requested, which received the name PSN (or PSN-1 in some literature).
 
In general, 10 copies of the PSN-1 were built, which were used in different tests of the Kvant guidance system and an autopilot system developed at that time.
 
In March 1938, after the arrest of Mijelson, the works were interrupted. All produced copies of the PSN were destroyed.
 
PSN
Wingspan: 8 m
Wing area: 13.2 sq.m
Length: 8.9 m
Height: 2.11 m
Empty weight: 970 kg
Loaded weight: 1970 kg
Speed: 150 - 350 km / h
Dive speed: 500 km / h
Range: 30 - 35 km
Accommodation: 1
 
 Mijelson-PT-04
 
 
 
 


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