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SM-4 Łątka
Photo: Unknown author · Wikimedia Commons · Public domain
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SM-4Łątka

Utility / Transport Helicopters · Poland
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SM-4Łątka

SM-4 Łątka
SM-4 Łątka Photo: Unknown author · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Payload / Capacity
20
Range
15
Versatility
35
Reliability
40
Speed
25
Survivability
10
Hot-and-High Performance
20
Maintainability
50
Technology
15
Cost-Effectiveness
60
Origin Poland
ManufacturerPZL-Świdnik
CategoryUtility / Transport Helicopters
Operators1 countries
Quantity1
Data Quality81%
28
Utility / Transport Helicopters MASS Rating
201/208
All-Time
Utility / Transport Helicopters · 10 axes scored
Payload / Capacity
20
Range
15
Versatility
35
Reliability
40
Speed
25
Survivability
10
Hot-and-High Performance
20
Maintainability
50
Technology
15
Cost-Effectiveness
60
ⓘ Regardless of era, the same scoring system applies to all units in the utility / transport helicopters category.
01 / Overview
SM-4 Łątka
Country
Prime contractor
Quantity
1
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
UTILITY / TRANSPORT HELICOPTERS
—
PERFORMANCE/PRICE
75
UNIT COST (2025 USD)
—
28
utility / transport helicopters category
ⓘ Performance/Price and MASS score are computed across all units in the utility / transport helicopters category, regardless of era.
02 / Specs & Design
◎General4MOD.4
  • Crew1
  • Passengers2
  • Primary RoleLight utility helicopter
  • In ServiceNo
◈Powerplant7MOD.7
  • Engine TypeNarkiewicz WN-6S
  • Number of Engines1
  • Engine Power (each)134 kW
  • Rotor ConfigurationSingle main rotor, two-bladed tail rotor
  • Main Rotor Diameter10 m
  • Main Rotor Blades3
  • Anti-Torque TypeTail rotor
▣Performance4MOD.4
  • Top Speed115 km/h
  • Service Ceiling3,300 m
  • Range300 km
  • Rate of Climb4.4 m/s
◇Dimensions & Weights3MOD.3
  • Rotor Disc Area78.5
  • Empty Weight660 kg
  • Max Takeoff Weight1,000 kg
▲Production2MOD.2
  • Total Built1
  • Variants0
◎Service History2MOD.2
  • Production Start1960
  • Operational StatusAbandoned
03 / History
04 / Operators
Operator Countries1country
📚 Sources
📖 ENCYCLOPEDIA Browse the Utility / Transport Helicopters entry →