Hamilton Standard accept zero RPM condition
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- Dominant language
- Python
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- 287
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- 140
- Avg merge
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Description
Desired capability or behavior.
Right now, the Hamilton Standard breaks for conditions where the propeller is not moving, because tip speed is needed in a ratio (which will cause a divide by zero). It would be helpful to have the propeller model return a thrust of zero in this case, as raising an AnalysisError here stops analysis for a condition that is physically possible on aircraft.
Realistically we would want a windmill drag penalty when this happens, but that would require an extension of the method, so I am proposing simply returning zero thrust for now.
Is your feature request related to a problem? Please describe.
No response
Associated Bug Report
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the Hamilton Standard propeller model and the calculation that raises AnalysisError when tip speed is zero. Trace the existing tests for this model, then verify that a stationary propeller returns zero thrust and analysis continues without the error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100