The Rue Little Giant locomotive injector regulates feed with a movable combining tube. Explore the tube, clamp and lever together with the separate lift steam valve in this labelled section.
Little Giant Locomotive Injector Component Explorer
Move the illustrative combining-tube lever and toggle the separate lift steam valve to inspect the documented relationships. This is not a capacity calculator, calibration or operating procedure.
Equation Used
- The section is schematic and not dimensionally faithful.
- Lever position is normalized for explanation and is not a real scale or setting.
- Capacity, pressure range, temperature limits, dimensions, tolerances and operating sequence are intentionally outside the model.
The combining tube moves with its clamp and lever. The diagram illustrates the described reduced-feed and increased-feed directions, without assigning flow rates or calibrated settings.
Documented Little Giant arrangement
Hiscox describes a separate steam valve for starting the lift, followed by handle action that opens the injection nozzle and closes the lift-nozzle ports. Contemporary locomotive texts identify a movable combining tube operated by a lever. A period description states that movement toward one marked end tends to cut off the feed, while movement toward the other increases it.
The animation identifies components from the contemporary parts list and makes the tube, clamp and lever move together. It does not reconstruct unreported dimensions or internal fluid dynamics.
Historical component identification
Use this screen to identify the body, main valve, steam tube, combining tube and clamp, discharge tube, overflow, check valve and lever relationship. It cannot select, rate, recommission or diagnose boiler-feed equipment.
Interpreting the lever position
The lever control shows a relative position and the associated feed-adjustment direction. It does not specify throat dimensions, pressure or flow capacity; those require the exact injector's dimensions and performance data.
Reading the component explorer
Move the normalized lever toward A to display the source-described reduced-feed direction and toward B for the increased-feed direction. Toggle the separate lift steam valve to highlight its passage. These states explain relationships only; they are not operating instructions.
Model boundary and safety
The page does not establish maker-specific identity beyond the cited Rue pattern, capacity, steam pressure, water temperature, lift height, delivery head, pipe size, nozzle geometry, tolerance, adjustment or start/stop sequence. Use the exact equipment manual, applicable boiler code and trained personnel.
Little Giant locomotive injector questions
Is the combining tube fixed?
Not in the cited Rue Little Giant descriptions; it is explicitly movable and lever-operated.
Does lever percentage equal a real setting?
No. It is a normalized explanatory control.
Can this screen size or troubleshoot an injector?
No. The section identifies components and relative motion; it does not predict performance or diagnose operating faults.
Primary and contemporary references
- G. D. Hiscox, Mechanical Movements, figure 383: separate lift steam valve, handle-controlled nozzles and screw-and-yoke combining-tube adjustment.
- Locomotive Appliances, Little Giant sectional view and parts list: body, valves, combining-tube clamp, lever, steam tube, combining tube, discharge tube and check valve.
- Locomotive Engine Running and Management: identifies the Rue Manufacturing Little Giant and its lever-operated movable combining tube.
Building or designing a mechanism like this?
Explore the precision-engineered motion control hardware used by mechanical engineers, makers, and product designers.
