SPIRIT
12th January 2009, 01:02 AM
I'm looking for help with a project l am doing with disengaged teenagers at high school
all the branches meet for a humane powered boat race at the end of the school year so far my school has had a DNF and a mid field ending
l ask you how hard is rowing :p
so this year I'm fitting a bikes to run a prop
The idea so far is remove the spokes from the rear wheel and bolt the gear that is near the pedals instead of the rim that way l can still use the gears on the 10 speed
then chain drive the rear shaft though a small bike gear ,then will run it though a diff (maybe one off a ride on mower ):?
now two questions what is a good prop for the speed that l can get my student make with this set up ??
2ND question but one more important how do you the rear gear off the hub ,there is a bearing on top ,no way of getting under it
had a test hit sitting the gear on the vice and hitting a nut washer thing inside the gear :(
worked out most of the other stuff if l cant get a mower diff free l may have to make one
hay is there a formula for gearing rpm= trust :?
may get the science class involved testing the beast
l may make it a wip if anybody is interested
simple boat plans would help :D
or ideas how to get more speed the thing is the whole job has to cost only 100$:p
all the branches meet for a humane powered boat race at the end of the school year so far my school has had a DNF and a mid field ending
l ask you how hard is rowing :p
so this year I'm fitting a bikes to run a prop
The idea so far is remove the spokes from the rear wheel and bolt the gear that is near the pedals instead of the rim that way l can still use the gears on the 10 speed
then chain drive the rear shaft though a small bike gear ,then will run it though a diff (maybe one off a ride on mower ):?
now two questions what is a good prop for the speed that l can get my student make with this set up ??
2ND question but one more important how do you the rear gear off the hub ,there is a bearing on top ,no way of getting under it
had a test hit sitting the gear on the vice and hitting a nut washer thing inside the gear :(
worked out most of the other stuff if l cant get a mower diff free l may have to make one
hay is there a formula for gearing rpm= trust :?
may get the science class involved testing the beast
l may make it a wip if anybody is interested
simple boat plans would help :D
or ideas how to get more speed the thing is the whole job has to cost only 100$:p