Smithsonian Institution
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Asset Name:
media:NASM-A19790174000_DSH02

File Usage:

Not determined
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Object details:

Object Name: Rocket Engine, Liquid Fuel, Surveyor Vernier, also Designated TD-339
Smithsonian Record ID: edanmdm:nasm_A19790174000

	Object Name
	Rocket Engine, Liquid Fuel, Surveyor Vernier, also Designated TD-339

	Metadata Usage
	Not determined

	Guid
	http://n2t.net/ark:/65665/nv9b470e42b-1867-496d-b29f-8122ff93d084

	Data Source
	National Air and Space Museum

	Manufacturer
	Reaction Motors Div., Thiokol Chemical Corp.

	Materials
	Combustion chamber, concentric stainless steel shell lined with Rokide-Z ceramic coating; nozzle, molybdenum coated with a high emissivity material; a silcon carbide ring placed at the top of the combustion chamber with a silicone carbide throat insert around the internal throat; exposed surfaces of the vernier plumbing, coated with gold plate 0.001 inches thick and polished to a high luster.

	Dimensions
	Overall: 13 in. long x 5 1/2 in. diameter, 5.5 lb. (33.02 x 13.97cm, 2.5kg)

	Summary
	This is the vernier rocket motor for the Surveyor unmanned lunar landing probe, America's first spacecraft to soft-land on the Moon. It was never flown but was test fired and probably therefore served as a developmental model. The vernier was small but of critical importance in providing propulsion for mid-course correction maneuvers and attitude and velocity control before and during the landing. It had to be absolutely reliable with restart capability. The vernier produced 30-104 pounds of thrust and was only fired for short bursts as required. The engine was used successfuly on all of the Surveyor missions from 1966 to 1968. This motor was transferred to the Smithsonian in 1979 from the NASA Jet Propulsion Laboratory.

	Country of Origin
	United States of America

	Credit Line
	Gift of Reaction Motors Division, Thiokol Chemical Corp.

	Inventory Number
	A19790174000

	Type
	PROPULSION-Rocket Engines

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