Steam Engine Reviews/Arrowhead Bump Valve Summary: Difference between revisions
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(Created page with "{{Category=Steam Engine}} Steam Engine Reviews The so-called Arrowhead Bump Valve engine design has been reviewed by several people at the current time (7/20/11). This page...") |
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* Valve opening and timing is critical - difficult to adjust. | * Valve opening and timing is critical - difficult to adjust. | ||
* Cylinder liner is expensive. | * Cylinder liner is expensive. | ||
* Cylinder end needs holes to let in (and out) air. | |||
* Piston rings are expensive. | * Piston rings are expensive. | ||
* Oiler is expensive. | * Oiler is expensive. | ||
| Line 24: | Line 25: | ||
* Engine is hot - no shields for safety. | * Engine is hot - no shields for safety. | ||
* Crankshaft is open - safety hazard. | * Crankshaft is open - safety hazard. | ||
=CAD Problems= | |||
[[Image:cad-problems.png]] | |||
[[Category:Steam Engine]] | [[Category:Steam Engine]] | ||
Latest revision as of 19:25, 20 July 2011
Main > Energy > Steam Engine
The so-called Arrowhead Bump Valve engine design has been reviewed by several people at the current time (7/20/11). This page summarizes the design problems and provides suggestions on how to deal with them.
Problem Summary
- Horizontal layout promotes wear, jamming, etc.
- Water can condensing in the engine leading to a blow-out.
- Placement of exhaust vent means compressing air in the cylinder and losing work.
- Steam is admitted before top dead center, losing some work.
- Valves must seat and create a seal against steam.
- Valves are heavy and slow to react.
- Valves take a beating from bump pins.
- Valve opening and timing is critical - difficult to adjust.
- Cylinder liner is expensive.
- Cylinder end needs holes to let in (and out) air.
- Piston rings are expensive.
- Oiler is expensive.
- Piston head is heavy, moving it loses work.
- Piston head has no heat shield.
- Bump pins may vibrate out of their holes.
- Oil mixes with steam and causes pollution.
- Crankshaft is built up of parts that must be precisely aligned or vibration results.
- Engine is hot - no shields for safety.
- Crankshaft is open - safety hazard.
CAD Problems
