#5965 NORM Never A: Hand Crank can only charge the laptop 21 times

[Zarro Boogs per Child]

#5965: Hand Crank can only charge the laptop 21 times
---------------------------------------+------------------------------------
 Reporter:  arjs                       |       Owner:  wad           
     Type:  defect                     |      Status:  new           
 Priority:  normal                     |   Milestone:  Never Assigned
Component:  mechanical                 |     Version:                
 Keywords:  crank, freeplay, charging  |    Verified:  0             
 Blocking:                             |   Blockedby:                
---------------------------------------+------------------------------------
 (With reference to the the green hand crank)
 On the page http://wiki.laptop.org/go/Product_News

 there is a link to the Freeplay Hand crank spec sheet
 http://wiki.laptop.org/go/Image:OLPC_clamp_charger_detailed_spec.doc

 Page 1 of the spec sheet (under the section of Benefits) mentions that
 the Crank can work upto 500,000 revolutions.

 Cranking at the rated rpm(130rom), it means that it can do 500000/130 =
 3846 minutes  = 64 hours.

 One session of cranking takes about 3 hours, which means that the laptop
 can only be charged 64/3 = 21 times.

-- 
Ticket URL: <http://dev.laptop.org/ticket/5965>
One Laptop Per Child <http://dev.laptop.org>
OLPC bug tracking system