sketch model review - massachusetts institute of...
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Sketch ModelReview
Empowering Tanzanian FarmersMotoThresher
Motivation
Motivation
Motivation
Motivation
Motivation
Motivation
Motivation
+ thresher
throughput [kg/hr]
pric
e [$
]
30050 100
$3000
$115
MotoThresher
Motivation
Can we design an effective threshing mechanism?
Threshing
MotivationThreshing performance
motorcycle speed [rpm]
amou
nt t
hres
hed
[%]
100
20050 100
50
Can we winnow effectively using a fan?
Winnowing
Separation of the grain from the husk
Wind blows lighter material away
Heavier material collected at the bottom
MotivationWinnowing performance
Out
put
[%]
100
HighLow Med
50
KEYGrain
Husk
Fan speed
Threshing1
Winnowing I2
Dehusking3
Winnowing II4
Future Plans
Threshing1
Winnowing I2
Dehusking3
Winnowing II4
Future Plans
mock-up
Threshing1
Winnowing I2
Dehusking3
Winnowing II4
Future Plans
mock-up
target
Empowering Tanzanian FarmersMotoThresher
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