EntityQ3938216· pop 5· linked from 124 articlesMartin BMSign in to save1929 attack aircraft familyConnectionsR-1690 HornetEntityUnited StatesCountryWashington, D.C.EntityCaliforniaEntityPennsylvaniaEntityMarylandEntityPhiladelphiaEntityInternational Standard Book NumberEntitySan DiegoEntityBaltimoreEntitywattEntityBoeingPublic companyInternational Standard Serial NumberEntityaircraft carrierEntityGeneral MotorsEntityUnited States NavyEntitymetric horsepowerEntityUnited States Marine CorpsEntitybiplaneEntityundercarriageEntityCategories1920s United States bomber aircraftAircraft with fixed conventional landing gearBiplanesCarrier-based aircraftMartin aircraftSingle-engined piston aircraftSingle-engined tractor aircraft