A manual starter for an engine includes a main housing, an output shaft, a spring housing, a spring, and an attachment unit. The output shaft is disposed at least partially inside the main housing, and is configured to supply a starting torque to the engine. The spring housing is disposed in the mai
A manual starter for an engine includes a main housing, an output shaft, a spring housing, a spring, and an attachment unit. The output shaft is disposed at least partially inside the main housing, and is configured to supply a starting torque to the engine. The spring housing is disposed in the main housing. This spring is disposed in the spring housing, and is configured to receive an initial force from a starter cord and to supply the starting torque to the output shaft. The attachment unit is configured to selectively couple the spring to the output shaft before the engine has started and decouple the spring from the output shaft after the engine has started.
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We claim: 1. A manual starter system for an engine, the manual starter system comprising: a main housing; an output shaft disposed at least partially inside the main housing, the output shaft configured to supply a starting torque to the engine; a spring housing disposed in the main housing; a spri
We claim: 1. A manual starter system for an engine, the manual starter system comprising: a main housing; an output shaft disposed at least partially inside the main housing, the output shaft configured to supply a starting torque to the engine; a spring housing disposed in the main housing; a spring disposed in the spring housing, the spring configured to receive an initial force from a starter cord and to supply the starting torque to the output shaft; a first attachment unit configured to selectively couple the spring to the output shaft before the engine has started and decouple the spring from the output shaft after the engine has started; a rope pulley assembly disposed in the main housing; and a second attachment unit configured to selectively couple the rope pulley assembly to the output shaft before the engine has started and decouple the rope pulley assembly from the output shaft after the engine has started. 2. The manual starter system of claim 1, wherein the first attachment unit and the second attachment unit each comprises a plurality of pawls coupled to the output shaft. 3. The manual starter system of claim 2, wherein: the first attachment unit further comprises a coupler coupled to the spring and configured to be selectively engaged and disengaged to at least one of the plurality of pawls. 4. The manual starter system of claim 3, wherein the at least one of the plurality of pawls comprises: an opening configured to selectively engage the spring; a first portion on a first side of the opening, the first side having a thickness T1 and a weight W1; and a second portion on a second side of the opening, opposite the first side, the second portion having a thickness T2 that is greater than T1, and having a weight W2 that is greater than W1. 5. The manual starter system of claim 4, wherein the at least one of the plurality of pawls disengages from the coupler after the engine has started. 6. The manual starter system of claim 3, further comprising: a stop formed in the output shaft, the stop configured to prevent the at least one of the plurality of pawls from rotating more than a predetermined angle following disengagement from the coupler. 7. The manual starter system of claim 6, wherein the predetermined angle is approximately thirty degrees. 8. The manual starter system of claim 1, wherein the rope pulley assembly is configured to facilitate transfer of the initial force from the starter cord to the spring. 9. The manual starter system of claim 1, wherein the output shaft is configured to supply the starting torque to an engine for a micro air vehicle. 10. The manual starter system of claim 1, further comprising: a dual bearing interface for the output shaft. 11. A manual starter system for an engine, the manual starter system comprising: a main housing; a starter cord disposed at least partially outside the main housing, the starter cord configured to receive an initial force; a spring housing disposed in the main housing; a drive assembly disposed at least partially within the main housing and configured to transfer the initial force from the starter cord to the spring housing, the drive assembly comprising a rope pulley assembly disposed in the main housing; a spring disposed in the spring housing, the spring configured to receive the initial force from the spring housing and to supply a starting torque for the engine; an output shaft disposed at least partially inside the main housing, the output shaft configured to receive the staffing torque from the spring and to supply the starting torque to the engine; a first attachment unit configured to selectively couple the spring to the output shaft before the engine has started and to decouple the spring from the output shaft after the engine has started, the first attachment unit comprising: a first pawl coupled to the output shaft; and a first coupler coupled to the spring and configured to be selectively engaged and disengaged to the first pawl; and a second attachment unit configured to selectively couple the rope pulley assembly to the output shaft before the engine has started and decouple the rope pulley assembly from the output shaft after the engine has started, the second attachment unit comprising: a second pawl coupled to the output shaft; and a second coupler coupled to the rope pulley assembly and configured to be selectively engaged and disengaged to the second pawl. 12. The manual starter system of claim 11, wherein the first pawl comprises: an opening configured to selectively engage the spring; a first portion on a first side of the opening, the first side having a thickness T1 and a weight W1; and a second portion on a second side of the opening, opposite the first side, the second portion having a thickness T2 that is greater than T1, and having a weight W2 that is greater than W1. 13. The manual starter system of claim 12, wherein the first pawl disengages from the first coupler after the engine has started. 14. The manual starter system of claim 11, further comprising: a stop formed in the output shaft, the stop configured to prevent the first pawl from rotating more than a predetermined angle following disengagement from the first coupler. 15. The manual starter system of claim 14, wherein the predetermined angle is approximately thirty degrees. 16. The manual starter system of claim 1, wherein the output shaft is configured to supply the starting torque to an engine for a micro air vehicle. 17. A micro air vehicle comprising: a main body; a plurality of electronic pods coupled to the main body; an engine disposed in the main body and coupled to the plurality of electronic pods; and a manual starter system comprising: a main housing; a starter cord disposed at least partially outside the main housing, the starter cord configured to receive an initial force; a spring housing disposed in the main housing; a drive assembly disposed at least partially within the main housing and configured to transfer the initial force from the starter cord to the spring housing, the drive assembly comprising a rope pulley assembly disposed in the main housing; a spring disposed in the spring housing, the spring configured to receive the initial force from the spring housing and to supply a starting torque for the engine; an output shaft disposed at least partially inside the main housing, the output shaft configured to receive the starting torque from the spring and to supply the starting torque to the engine; a first attachment unit configured to selectively couple the spring housing to the output shaft before the engine has started and to decouple the spring from the output shaft after the engine has started, the attachment unit comprising: a first pawl coupled to the output shaft; and a first coupler coupled to the spring and configured to be selectively engaged and disengaged to the first pawl; and a second attachment unit configured to selectively couple the rope pulley assembly to the output shaft before the engine has started and decouple the rope pulley assembly from the output shaft after the engine has started, the second attachment unit comprising: a second yawl coupled to the output shaft; and a second coupler coupled to the rope pulley assembly and configured to be selectively engaged and disengaged to the second pawl. 18. The micro air vehicle of claim 17, wherein the first pawl comprises: an opening configured to selectively engage the spring; a first portion on a first side of the opening, the first side having a thickness T1 and a weight W1; and a second portion on a second side of the opening, opposite the first side, the second portion having a thickness T2 that is greater than T1, and having a weight W2 that is greater than W1. 19. The micro air vehicle of claim 18, wherein the first pawl disengages from the first coupler after the engine has started. 20. The micro air vehicle of claim 18, further comprising: a stop formed in the output shaft, the stop configured to prevent the first pawl from rotating more than a predetermined angle following disengagement from the first coupler.
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