kool go kart help
Posted: Mon May 08, 2006 10:05 pm
ok i'm in this friendly competition to make a cart, i dont wanna race just for fun
my dad is a very demanding person, i need the engine but he will only pay for one if i showed that i made effort to finish the body of the cart, so he doesnt "waste money" if i "whimp out"
so i better get this right, since i dont have an engine to work off of
oh and i want everything to be bear mininum, no room for "just to be sures" and "margin of error", i'm short of cash
heres a few pictures of what i plan
see
the d3 design is the one i wanna try
i am confident that design will hold up, yellow is 1/2" thick plywood, the dark grey stuff is those L shaped steel rails with predrilled holes
steerings is a no-brianer
complex said if i use a 6.5 hp engine (most likely) i need a 7.5:1 gear ratio, my wheel diameter is 6", i want to go at 30 kph
30 kph=19685 inch per minute, circumference of wheel 6*3.14=19
19685/19=1036
so i want 1036 rpm on the axle
engine max is 3600 rpm (correct?)
math tells me i want a 3.5:1 gear ratio
i estimate the cart to weight 150 kg with me included
is 6.5 hp enough? if not, what is?
also i see some go karts being sold, 6.5 hp, 6" wheels, something like 40 kph, so with my horrible noobish skills, a 6.5 hp, 6" wheel, 3.5:1 gear ratio cart certainly could do 30 kph right?
do i want roller bearings or are ball bearingsgood enough for 1000rpm?
i want the drive train to be simple, gear on engine, chain, gear on axle.
is a clutch a must? will an engine idle even though it's shaft stop spinning?
or can i use a belt to solve this? as it will just slip on the pulley and continue spinning after i stop
and i know i can get a clutch if it is needed but is there anything specific i should ask for?
and how do i mount one?
what wheel should i use? metal with rubber tires? metal with urethane tires? plastic with rubber tires? plastic with urethane tires? plain plastic/rubber/urethane/metal? i think plastic with rubber will do, but you guys are the pros, what do you think is bear mininum?
EDIT i found two 6" plastic wheels, not good enough, no traction
if the engine comes with a muffler, it's useless right? i dont care about noise, i mean, come on, i shoot spuds for a hobby
oh, and this has to be made with out any welding or machining
and if you care enough
http://www.reliablebearing.com/
is a 30min walk from my place
sells gears pulleys chains belts wheels motor bearings clutch pneumatics and other stuff + machining, cnc mill lathe they have it
it's like a all in one place for go karts except no hardware or engines
my dad is a very demanding person, i need the engine but he will only pay for one if i showed that i made effort to finish the body of the cart, so he doesnt "waste money" if i "whimp out"
so i better get this right, since i dont have an engine to work off of
oh and i want everything to be bear mininum, no room for "just to be sures" and "margin of error", i'm short of cash
heres a few pictures of what i plan
see
the d3 design is the one i wanna try
i am confident that design will hold up, yellow is 1/2" thick plywood, the dark grey stuff is those L shaped steel rails with predrilled holes
steerings is a no-brianer
complex said if i use a 6.5 hp engine (most likely) i need a 7.5:1 gear ratio, my wheel diameter is 6", i want to go at 30 kph
30 kph=19685 inch per minute, circumference of wheel 6*3.14=19
19685/19=1036
so i want 1036 rpm on the axle
engine max is 3600 rpm (correct?)
math tells me i want a 3.5:1 gear ratio
i estimate the cart to weight 150 kg with me included
is 6.5 hp enough? if not, what is?
also i see some go karts being sold, 6.5 hp, 6" wheels, something like 40 kph, so with my horrible noobish skills, a 6.5 hp, 6" wheel, 3.5:1 gear ratio cart certainly could do 30 kph right?
do i want roller bearings or are ball bearingsgood enough for 1000rpm?
i want the drive train to be simple, gear on engine, chain, gear on axle.
is a clutch a must? will an engine idle even though it's shaft stop spinning?
or can i use a belt to solve this? as it will just slip on the pulley and continue spinning after i stop
and i know i can get a clutch if it is needed but is there anything specific i should ask for?
and how do i mount one?
what wheel should i use? metal with rubber tires? metal with urethane tires? plastic with rubber tires? plastic with urethane tires? plain plastic/rubber/urethane/metal? i think plastic with rubber will do, but you guys are the pros, what do you think is bear mininum?
EDIT i found two 6" plastic wheels, not good enough, no traction
if the engine comes with a muffler, it's useless right? i dont care about noise, i mean, come on, i shoot spuds for a hobby
oh, and this has to be made with out any welding or machining
and if you care enough
http://www.reliablebearing.com/
is a 30min walk from my place
sells gears pulleys chains belts wheels motor bearings clutch pneumatics and other stuff + machining, cnc mill lathe they have it
it's like a all in one place for go karts except no hardware or engines