ASTM F2339-04
(Practice)Standard Practice for Design and Manufacture of Reciprocating Spark Ignition Engines for Light Sport Aircraft
Standard Practice for Design and Manufacture of Reciprocating Spark Ignition Engines for Light Sport Aircraft
SCOPE
1.1 This practice covers minimum requirements for the design and manufacture of reciprocating spark ignition engines for light sport aircraft, day VFR use.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation:F2339–04
Standard Practice for
Design and Manufacture of Reciprocating Spark Ignition
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Engines for Light Sport Aircraft
This standard is issued under the fixed designation F 2339; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.1.1 Drawings that define the engine configuration.
4.1.2 Material and process specifications referenced in the
1.1 This practice covers minimum requirements for the
parts drawings.
design and manufacture of reciprocating spark ignition engines
4.1.3 Engineering analyses and test data prepared for quali-
for light sport aircraft, day VFR use.
fication with this specification.
1.2 This standard does not purport to address all of the
4.2 Delivered Data—The following data should be deliv-
safety concerns, if any, associated with its use. It is the
ered to the airplane manufacturer to support design and
responsibility of the user of this standard to establish appro-
operation of the applicable airplane.
priate safety and health practices and determine the applica-
4.2.1 An engine performance specification that defines the
bility of regulatory limitations prior to use.
engine performance under all anticipated operating environ-
2. Significance and Use
ments.
4.2.2 An installation manual that defines all functional and
2.1 This practice provides designers and manufacturers of
physical interface requirements of the engine. This should
engines for light sport aircraft design references and criteria to
include an engine outline/installation drawing.
use in designing and manufacturing engines.
4.2.3 An operating manual that defines normal and abnor-
2.2 Declaration of compliance is based on testing and
mal operating procedures and any applicable operating limita-
documentation during the design and testing or flight testing of
tions.
the engine type by the manufacturer or under the manufactur-
4.2.4 A maintenance manual that defines periodic installed
ers’ guidance.
maintenance, major inspection, overhaul intervals, and any
3. Engine Model Designation
other maintenance limitations.
4.2.5 An overhaul manual that provides instruction for
3.1 Engine Parts List—A parts list is required for each
disassembling the engine to replace or repair, or both, parts as
engine model qualified in accordance with this specification.
required to return the engine to airworthy condition that is safe
3.2 New Engine Model Designations:
for operation until the next major overhaul.
3.2.1 Each new engine model must be qualified in accor-
dance with this practice.
5. Design Criteria
3.2.2 Design or configuration changes that impact the in-
5.1 Materials—The materials used in the engine must be
stallation interface, performance, or operability of the engine
adequate for the intended design conditions of the engine.
require a new engine model designation.
5.2 Fire Prevention—The design and construction of the
3.3 DesignChangesofParts—Each design change of a part
engine and the materials used must minimize the probability of
or component of an engine model qualified to this specification
the occurrence and spread of fire by:
should be evaluated relative to the requirements of this
5.2.1 Using fire-resistant lines, fittings, and other compo-
specification.
nents that contain a flammable liquid when supplied with the
4. Data Requirements
engine; and
5.2.2 Shielding or locating components to safeguard against
4.1 Retained Data—The following data and information
the ignition of leaking flammable fluid.
should be retained on file at the manufacturer’s facility for at a
5.3 Engine Cooling—The engine design must include pro-
minimum of 18 years after production is discontinued.
visionsforcooling;theinstallationmanualmustspecifyengine
and component temperature limitations.
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This practice is under the jurisdiction ofASTM Committee F37 on Light Sport
Aircraft and is the direct responsibility of Subcommittee F37.70 on Cross Cutting.
Current edition approved Aug. 1, 2004. Published August 2004.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F2339–04
5.4 Engine Mounting—Attach points on the engine must of crankshaft rotational speeds and engine powers without
have data for the correct design of mounting structures to the inducing excessive stress in any of the engine parts.
airframe. The maximum allowable limit and ultimate loads for
5.9.1 The engine must have a crankshaft vibration survey to
the engine mounting attachments and related structure must be
determinetorsionalandbendingcharacteristicsfrom
...
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