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Flight tests of upgraded helicopters

100%

Nowakowski M.

tom Vol. 18, No. 4

317-324

In-flight tests and measurements are usually performed for newly built or modernised aircraft utilised by the Polish Armed Forces. In the course of the in-flight tests the airborne equipment is investigated also. The main goal of the performed tests is to verify the tactical performance and to identify the technical parameters of the investigated aircraft or equipment. New aeronautical designs are subjected to flight test prior to being introduced into production and service. It is why ITWL was involved in both functional tests of equipment /systems installed on-board of helicopters as well as tests intended to determine flying qualities and performance thereof. Numerous test flights have been carried out in conformance to the newly developed methodology that takes account of the Joint Airworthiness Requirements - JAR 29 - Large Rotorcraft. Helicopter flight data and control parameters have been recorded in the course of experimental test flights by means of the measuring and recording equipment. The post-flight analyses of the recorded data made it possible to assess longitudinal static stability and directional stability, manoeuvrability and agility as well as performances of the upgraded helicopter Mi-17-IV.

The courses of the characteristics of spark ignition engines for fuelling with petrol and lpg gas in the dynamic conditions of motion

72%

Romaniszyn K. M.

tom Vol. 13, No. 1

325-331

This paper analyses and evaluates the dynamic speed characteristics calculated from the timed values of the acceleration of 2 cars fuelled in by petrol and liquefied LPG gas. One of the two cars was factory fitted with a carburettor, the other one was factory fitted with a multipoint injection system. Both cars were then fitted with put-on type LPG gas fuelling systems. The impact of the fuel type on the curves of torque generated by the engine in dynamic conditions and their reference to speed characteristics for steady operational conditions. The schema of a gas fuelled system for a car with carburettor petrol system and the schema of gas fuelled system for a car with an engine with multipoint petrol injection is presented in the paper. Test results involve variability of torques generated by the engine of the car with carburettor power supply petrol in the function of the rotational speed at accelerating the motion on IV and V gear, and the variability torques generated by the engine of the car supplied of MPI in the function of the rotational speed at accelerating the motion on IV and V gear. Building of feed gas installation causes the essential decreasing of the engine power especially at higher rotational speeds for the car-supplied standard with the carburettor, whereat this decreasing applies both feed petrol as and gas. However building of the feed gas installation does not cause the essential change torque at feed petrol with the standard multipoint injection petrol MPI. But essential decreasing torque in dynamic conditions occurs at the gas feed.

Dla samochodu zasilanego standardowo gaźnikiem, zabudowanie instalacji zasilania gazem powoduje istotny spadek mocy szczególnie na wyższych prędkościach obrotowych, przy czym spadek ten dotyczy zarówno zasilania benzyną jak i gazem. Dla samochodu zasilanego standardowo wielopunktowym wtryskiem benzyny MPI zabudowanie układu zasilania gazem nie powoduje istotnej zmiany momentu obrotowego w przy zasilaniu benzyną natomiast występuje istotny spadek momentu obrotowego w warunkach dynamicznych przy zasilaniu gazem.

Teatr czasu wojny 1939–1945 w świetle zadań i wartości

72%

Zawistowska M.

nr 6 (15)

202-212

The publication describes the activity of Polish theater during the Second World War. It is an attempt to look at theater from the perspective of the tasks and values it presented in this particularly difficult period. The article describes the functioning of open and underground theaters and theaters operating in concentration camps. The above-mentioned activities cannot be reduced to one formula or a specific species. In these conditions, the artistic level and innovation of many performances amaze. Paradoxically, this most dramatic theater achieved its greatest autonomy during the occupation. It has become a useful tool for restoring human dignity and art.