Data Quality85%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the tactical / medium bombers category.
01 / Overview
Keystone B-3
Category
Country
Production
1930–1930
Quantity
36
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
TACTICAL / MEDIUM BOMBERS · INTERWAR PERIOD
88
PERFORMANCE/PRICE
75
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the tactical / medium bombers category, regardless of era.
02 / Specs & Design
◎General6MOD.6
- First Flight1930
- Service Entry Year1930
- Crew5
- Primary RoleBomber
- GenerationBiplane
- In ServiceYes
◈Powerplant6MOD.6
- Engine TypePratt & Whitney R-1690-3
- Engine ModelPratt & Whitney R-1690-3 Hornet
- Number of Engines2
- AfterburnerNo
- SupercruiseNo
- Thrust VectoringNo
▣Performance5MOD.5
- Top Speed183 km/h
- Cruise Speed158 km/h
- Service Ceiling3,870 m
- Ferry Range1,400 km
- Rate of Climb2.692 m/s
◇Dimensions & Weights6MOD.6
- Length14.63 m
- Wingspan22.8 m
- Height4.8 m
- Wing Area106.4
- Empty Weight3,495 kg
- Loaded Weight5,875 kg
◆Armament7MOD.7
- Hardpoints0
- Internal Gun3 × .30 in (7.62 mm) machine guns
- Internal Weapons BayNo
- Air-to-Air MissilesNo
- Air-to-Ground MissilesNo
- Anti-Ship MissilesNo
- Nuclear CapableNo
▤Avionics & Stealth7MOD.7
⬢Production3MOD.3
- Total Built63
- Operators1
- Variants4
▲Service History4MOD.4
- Retirement Year1940
- Production Start1930
- Production End1930
- Operational StatusRetired
03 / History
SERVICE LIFESPANStill in Service
- 1930Production started
- 1931Entered service
96
years in service
0
years in production
36
units produced
2
countries operating
ⓘ The producing country still actively operates it.
05 / MASS Score
TACTICAL / MEDIUM BOMBERS RANKING Tactical / Medium Bombers · Interwar Period
MASS RANKINGSMASS ↗
210TACTICAL / MEDIUM BOMBERS88INTERWAR PERIOD · TACTICAL / MEDIUM BOMBERS2485UNITED STATES · ALL WEAPONS104PERFORMANCE/PRICE · TACTICAL / MEDIUM BOMBERS
ⓘ Rankings are within theTactical / Medium Bomberscategory.
📚 Sources