Question

Women in rural India have to walk a long distance to carry three to four pots filled with drinking water to their homes. This causes a lot of physical strain.
\(\textit{Design a device to help women carry four earthen pots of drinking water through uneven terrain. Identify at least five distinct factors essential in this device that will make it relevant for rural India.}\)
Present your design proposal with:

A neat freehand sketch showing the overall form and its features 
Sketches illustrating the usage scenario 
Indicators of materials and processes used in manufacturing 
A brief note on design decisions taken (max 100 words) 
 

Hint:

For rural product concepts, prioritise: load path (where weight goes), failure modes (what breaks first), field repair, and seasonal multi-use. Sketch the user posture and centre of gravity in every view.

Answer 1

Concept name: JAL-SAHAY “4-pot carrier''

One-line intent

Hands-free, stable, low-cost carrier that safely transports four earthen pots on rough village paths. (Placeholders for hand sketches – replace paths if you add drawings)

Overall form & key features

• Two-wheel yoke frame: Narrow, inverted-\(\Pi\) tubular frame with \(\sim\)500\,mm wheel track for goat trails; large 24'' spoked wheels for rollover ability.
• Shock-damping pot cradles (x4): Suspended rubber-web slings inside circular rings; each ring has three-point elastic ties to reduce jar fracture.
• Height-adjustable drawbar harness: Padded waist–hip belt with quick-release; optional shoulder strap to split load and keep hands free.
• Low centre of gravity layout: Two pots low ahead of axle + two slightly higher behind; anti-tip skids and a parking leg for rests.
• Modular stack: Rings remove without tools; device converts to firewood/produce trolley off-season.

Five (plus) essential factors for rural relevance 

• Affordability: <$25 equivalent bill of materials using bicycle parts and local fabrication.
• Repairability: Standard bicycle hubs, spokes, tyres; nuts–bolts, no proprietary parts.
• Ergonomics: Hip-belt load transfer, adjustable height (5th–95th percentile), soft grips.
• Safety of pots: Shock isolation slings, rope retainers, rim padding, low CG to prevent tip.
• Terrain performance: Big wheels, narrow track, 150\,mm ground clearance, toe brake.
• Water hygiene: Food-grade liners for slings, washable sling webbing, mudguards.
• Cultural fit: Allows saree/ghagra movement; aesthetic bamboo option.

Materials & processes 

• Frame: ERW mild-steel tube (\(\varnothing\)22–25\,mm); process: tube bending, MIG welding, powder-coat/galvanise.
• Cradle rings: 6\,mm MS rod rolled and welded; inner slings of tyre-tube rubber or polypropylene webbing (hand-stitched/riveted).
• Harness: Cotton webbing with EVA foam pads; process: stitching/riveting; buckle from injection-moulded PP.
• Wheels: 24'' bicycle rims, spokes, hubs (sourced); process: wheel building.
• Fasteners: M6/M8 zinc-plated bolts + nylock nuts for field service.

Usage scenario (sketch sequence suggested) 

• Park device using folding leg; load two lower pots, then upper two; tie with quick rope latch.
• Buckle hip belt; start walking—device trails behind with single-hand guidance if needed.
• On rough patches, use shoulder strap; for rests, deploy parking leg; unload at home.

Approx. dimensions & capacity 

L 950 mm \(\times\) W 500 mm \(\times\) H 900 mm; empty mass \(\approx\) 9–11 kg.

Pot dia. 280–320 mm each; total payload 40–50 kg (water + pots).

Design decisions (≤100 words)

Shifting the load from head/shoulders to hips via a belt–drawbar reduces musculoskeletal strain. Large bicycle wheels minimise rolling resistance and negotiate ruts. Suspended slings isolate shocks to prevent pot breakage. A narrow track fits village paths; low CG layout and parking leg prevent tip-overs during rests. Using standard bicycle parts ensures low cost, easy repair, and local employment; modular rings enable off-season use as a utility cart.