На сайте http://www.aviastar.org/helicopters.html за полчаса выбрал три прототипа ультралегких вертолетов из великого множества. Картинки, технические данные – все для вертолетчиков... мощность двигателя, диаметры винтов и их частоты вращения:
http://www.aviastar.org/helicopters_eng/revolution_mini.php
Technical data for Mini-500
Engine: 1 x Rotax 582 rated at 49.3kW, main rotor diameter: 5.84m, length: 6.85m, height: 2.51m, take-off weight: 379kg, empty weight: 219kg, max speed: 185km/h, cruising speed: 120km/h
Two-blade semi-rigid teetering main rotor, turning at 550 rpm, constructed using aluminium alloy spars and composite skins. Teetering two-blade tail rotor of aluminium alloy and steel construction, turning at 2,671 rpm.
http://www.aviastar.org/helicopters_eng/angel_kompress.php
Technical data for CH-7 "Kompress"
POWER PLANT: One 84.6kW Rotax 914 piston engine.
Main rotor diameter: 6.27m, tail rotor diameter: 1.03m, overall length, rotors turning: 7.41m, fuselage length: 5.31m, height to top of rotor head: 2.31m, empty weight (Europe): 245kg, take-off weight (Europe): 450kg, never-exceed speed: 209km/h, cruising speed: 160km/h, max rate of climb: 450m/min, service ceiling: 5000m, hovering ceiling, IGE: 3500m, hovering ceiling, OGE: 2500m, range with normal fuel: 552km, range with optional fuel: 719km, endurance: 3h 40min
Rotor blade aerofoil sections NACA 8-H-12 (main) and NACA 63-014 (tail); 1.5kg main rotor tip weights; max 520 rpm main, 2,808 rpm tail rotor.
http://www.aviastar.org/helicopters_eng/little_babybelle.php
Technical data for "Baby Belle"
Engine: 1 x Lycoming O-320 rated at 120.5kW, main rotor diameter: 7.62m, length: 9.0m, height: 2.67m, take-off weight: 370kg, max speed: 166km/h, cruising speed: 137km/h, ceiling: 2100m, range: 322km
Two-blade semi-rigid teetering main rotor, turning at 500 rpm; composite rotor blades. Teetering two-blade tail rotor with stainless steel blades turning at 2,750 rpm.
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Успехов!