This dimensional ledger subtracts entered spring and follower allowances from an entered magazine-tube length, then divides the remainder by entered cartridge overall length and rounds down to whole positions.
Actuator engineering note for Winchester Magazine Rifle Mechanism
In a winchester magazine rifle mechanism problem, the actuator is usually selected after the load path is understood. The important value is not just the weight being moved, but the force at the actuator pin after lever ratio, angle, friction, and worst-case position are included.
With leverage, force is traded against travel. A bracket change that improves force can also increase required stroke, slow the output motion, or move the actuator into a poor mounting angle.
The review should include the load direction, the bracket spacing, and the point in the travel where the linkage has the least mechanical advantage. If the actuator is selected from only an average force value, the design can pass an early spreadsheet check and still fail in the real assembly.
- Calculate actuator force at the worst bracket angle, not just at mid-stroke.
- Check stroke, retracted length, and extended length against the mechanism envelope.
- Confirm the structure can accept the higher loads created by a stronger actuator.
For a FIRGELLI actuator application, run the FIRGELLI actuator force calculator, then compare available stroke, force, and mounting envelope in the FIRGELLI linear actuator range. If the goal is to replace an existing unit, use the linear actuator replacement finder before assuming the new actuator is a direct fit.
Winchester Magazine Rifle Interactive Calculator
Enter tube length, compressed-spring allowance, follower length and cartridge overall length. The result is geometric packing only, not a firearm design, compatibility or safety determination.
Equation Used
- All entered lengths use the same axial reference.
- Cartridges are represented only by overall length.
- Spring compressed length and follower length are entered allowances.
- Capacity rounds down to whole axial positions.
- Feeding, compatibility, pressure, construction, modification and safety are outside scope.
Tubular Magazine Length Ledger
Historical tubular-magazine arrangements appear in U.S. Patent 55,012. This calculator is limited to axial packing arithmetic.
What This Calculator Represents
A one-dimensional whole-position packing count after entered allowances.
Axial Packing
Cexact=U/Loal
C=floor(Cexact)
remainder=U-C Loal
Worked Scenario
For 24 in tube length, 0.75 in spring allowance, 0.75 in follower and 1.59 in item length, usable length is 22.50 in and the whole-position count is 14.
Assumptions and Limits
No mechanism, feeding, ammunition compatibility, firearm construction, pressure or safety calculation is included.
Frequently Asked Questions
Is spring compression predicted?
No.
Does this determine ammunition compatibility?
No.
Are rims or feeding geometry included?
No.
Why round down?
Only whole axial positions fit.
Is leftover space clearance?
It is only arithmetic remainder.
Can this be used to build or modify a firearm?
No.
References
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