Project HARP

Project HARP, for high altitude research project, was a joint venture of the United States Department of Defense and Canada's Department of National Defence created with the goal of studying ballistics of re-entry vehicles and collecting upper atmospheric data for research. Unlike conventional space launching methods that rely on rockets, HARP instead used very large guns to fire projectiles into the atmosphere at extremely high speeds.

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Wikimedia, Wikidata
High Altitude Research Programme; High Altitude Research Project; Project H.A.R.P.

space program, 

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Location: 13.0773, -59.4756, KML, Cluster Map, Maps,

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Frameless

Project Harp

Abandoned-HARP-Gun

Project Harp

But that is an engineered iilusion

Bigger HARP gun

Barrel with one-metre bore

HARP guns from Space

Much Bigger HARP gun

Smaller HARP gun

HARP gun with turret

Type	Subtype	Date	Description	Notes	Source
commons	image		Project Harp		Commons
commons	image		Abandoned-HARP-Gun		Commons
commons	image		Project Harp		Commons
commons	image		But that is an engineered iilusion		Commons
commons	image		Bigger HARP gun		Commons
commons	image		Barrel with one-metre bore		Commons
commons	image		HARP guns from Space		Commons
commons	image		Much Bigger HARP gun		Commons
commons	image		Smaller HARP gun		Commons
commons	image		HARP gun with turret		Commons