EntityQ5883257· pop 5· linked from 66 articlesHolman ProjectorSign in to saveA pneumatic or stem powered anti-aircraft developed and used during World War Two.ConnectionsWorld War IIConceptdepth chargeEntityanti-aircraft warfareEntityMediterranean SeaEntityWorld War IConceptWinston ChurchillPersonpotatoEntitymuseumEntityInternational Standard Book NumberEntityCommonwealth of NationsEntitysubmarineEntitysteam engineEntityPrime Minister of the United KingdomEntitytorpedoEntitycast ironEntityRoyal NavyEntitydestroyerEntitycompressorEntityBritish ArmyEntityvalveEntityCategoriesAnti-aircraft guns of the United KingdomBritish Merchant NavyGrenade launchers of the United KingdomIngersoll RandMilitary history of CornwallNaval anti-aircraft weaponsPneumatic mortarsWeapons and ammunition introduced in 1940World War II naval weapons of the United Kingdom