Gribowski G-28

Gribowski G-28 (TI-28)
Type:	School fighter plane
Design country:	Soviet Union
Manufacturer:	Gribowski / OSSOAWIACHIM
First flight:	May 22, 1941
Number of pieces:	1 prototype

The Gribowski G-28 Kretschet ( Russian Грибовский Г-28 Кречет , German  Gerfalke ) was an aircraft of the Soviet aircraft designer Vladimir Gribowski in the 1940s.

development

The single-seat low-wing aircraft made entirely of wood was developed as a fighter aircraft trainer by OKB -28. Gribowski chose a rigid, bare landing gear, but a closed cockpit. The Renault Bengali MW-6 engine, manufactured under license in the Soviet Union, was selected as the drive . The armament consisted of two SchKAS machine guns and a shooting camera . Up to 40 kg of weaponry could be carried for bomb training.

In the spring of 1941 the machine was assembled, the first flight took place on May 22, 1941 by W. Gawrilow. Under the direction of the LII , several other pilots, including M. Gromow , P. Stefanowski and A. Jumaschew, tested the aircraft and gave it good reviews. The flight tests could be completed within a month. It was suggested to use the more powerful MW-6A engine and then carry out flight tests again. When introducing production, the designation TI-28 (TI for training hunters) should be assigned.

With the start of the Great Patriotic War exactly one month after the first flight, however, the LII was evacuated and work stopped. The first prototype was flown to Yekaterinburg , where its trail is lost. The second prototype under construction was no longer completed.

Technical specifications

Parameter	Data
length	7.66 m
span	9.00 m
height	2.80 m
Wing area	11.60 m²
Empty mass	897 kg
Max. Takeoff mass	1157 kg
Top speed	303 km / h at an altitude of 1600 m, 275 km / h near the ground
Cruising speed	226 km / h
Landing speed	90.5 km / h
Rise time	19.4 min at 5000 m
Take-off run	280 m
Range	500 km
Service ceiling	6600 m
Engine	a Renault Bengali MW-6
power	220  PS (approx. 160  kW )
Starting power	240 PS (approx. 180 kW)