The prototype flew for the first time in August 1925. An unequal-span biplane, intended for reconnaissance duties, it was of all-metal construction with corrugated sheet covering. The original 298kW Liberty engine was replaced by a 336kW Napier Lion, the aircraft then being redesignated R-3NL The first 12 series aircraft had Liberty engines but the next 18 had the Soviet development of this powerplant, which was designated M-5. The final 79 aircraft with the 336kW Lorraine Dietrich engine were designated R-3LD, and one ANT-3 was tested with a 507kW BMW VI. Most R-3s saw military service, but a few retaining the ANT-3 designation were flown as mailplanes or used for liaison and for propaganda flights. The R-3LD version had a maximum speed of 205km/h, was armed with three 7.7mm machine-guns and could carry 10 10kg bombs on external racks. Plans for a Shturmovik version with 400kg of armour protection came to nothing.
|A three-view drawing (552 x 782)|
| ENGINE||1 x M-5,|
| Take-off weight||2103 kg||4636 lb|
| Empty weight||1351 kg||2978 lb|
| Wingspan||13.0 m||43 ft 8 in|
| Length||9.9 m||33 ft 6 in|
| Height||3.9 m||13 ft 10 in|
| Wing area||36.0 m2||387.50 sq ft|
| Max. speed||204 km/h||127 mph|
| Ceiling||4600 m||15100 ft|
| Range||750 km||466 miles|
| ARMAMENT||3 x 7.62mm machine-guns|
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