Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: rozpylanie pestycydów

Sortuj według:

Ogranicz wyniki do:

Designing a compact firefighting vehicle for narrow residential areas on the base of a lawn mower

Hong Thong Duc, Truong Phat Tan, Pham Minh Quang, Tran Lam Quang

Zeszyty Naukowe. Transport / Politechnika Śląska

2023

z. 121

107--126

With the explosion of urbanization, more and more small residential areas with high population density, tiny houses, and narrow roads are formed. As a result, it is challenging for large fire engines to penetrate these areas in the event of a fire incident. In this paper, a compact firefighting vehicle was designed based on the SNAPPER LT140H331KV lawn mower. The vehicle is equipped with a water sprayer system and a folding frame water tank. The water sprayer system transmits power from the lawn mower transmission’s power take-off shaft via the belt and chain drive, which can spray water at a height of about 13 m with a flow rate of 38 L/min. The 500-liter folding frame water tank has a rectangular shape that can be folded and dragged as a trailer. The water sprayer system and folding frame water tank not only have a simple, compact structure but also do not affect the lawn mowing function. This fire truck has a maximum speed of about 15 km/h and can move in a minimal road width of only 1.3 m, which is accommodation for residential areas within a 1÷2 km radius with narrow roads, high density of population and houses in least developed and developing countries (e.g., Vietnam, Laos, Cambodia), where the normal fire engines are difficult to access in time. Besides, the vehicle can be used for watering and spraying pesticides on gardens and small premises. The study has proposed a valuable solution to take advantage of vehicle functions to improve their convenience and usefulness.

Fire fighting aircraft of medium capacity - from concept to design layout

Frydrychewicz A., Goraj Z., Ransom E., Wagstaff P.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

1998

nr 8

181-194

This paper presents an evaluation of available aircraft types and demonstrates the lack of a low cost aircraft optimised for fighting forest fires, spreading viscous liquids for land reclamation and spraying pesticides over forest areas. It shows that among critical areas demanding special consideration are (1) the development of mathematical models for the water bomb/aircraft separation and the aircraft stability following separation, (2) the identification of parameters influencing the coherence of the water column, effectiveness of the water delivery for fire-fighting (3) choice of aircraft configuration and (4) hopper configuration. The main aerodynamic characteristics of the selected aircraft have been computed by means of panel methods. Design and numerical analysis has led to the selection of the biplane as the best aircraft and hopper configuration. Another important concept - developed at PZL-Okęcie and presented in this paper - consists in using parts of the design from existing aircraft. The pilot's cabin, the rear part of the fuselage with control surfaces and wings originate from the PZL-106 KRUK. This diminishes the cost of design and prototype construction as well as of the cost of the airplane production. It has been shown that an important cost factor in the operation of such a fire-fighting aircraft is the weight of the agent which may be carried for the same fuel consumption. This cost factor, representing the economical efficiency of a fire-fighting aircraft has been computed and compared for a number of fire-fighting aircraft. The design under consideration (called PZL-240 PELIKAN) has the above-mentioned factor equal to 14, whereas the average value for other aircraft is about 8.