| Technical data | |
|---|---|
| Type | K-3 |
| Function | Ambulance |
| Year | 1927 |
| Crew | 1 |
| Engines | 1*240hp BMW-IV |
| Length | 11.17m |
| Wingspan | 16.7m |
| Wing area | 40.0m2 |
| Empty weight | 1560kg |
| Loaded weight | 2300kg |
| Wing Load (kg/m2) | 57.5 |
| Power load (kg/hp) | 9.6 |
| Maximum Speed (0m) | 170km/h |
| Cruise Speed | 140km/h |
| Landing Speed | 75km/h |
| Take off Roll | 250m |
| Landing Roll | 200m |
| Range | 730km |
| Ceiling | 880m |
| Climb | |
| 1000m | 10.6min |
| 2000m | 23min |
| 3000m | 45min |
| Payload | |
| Seats | 3 |
| Load | 330kg |
K-3, K.A.Kalinin
 |
Ambulance aircraft of mixed construction, modification of K-1. Wide door on the left side allowed easy loading/unloading or stretched patients. It provided accommodation for a doctor and 2 stretchers (or four seats) for patients. It was fully equipped for medical purposes.
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