Hey all,
I'm a mechanical engineering student and I wanted to get some more hands on experience with engines, as well as build a machine to tear around campus in style.
I bought an old 116cc chainsaw, and I'm going to weld a steel tube frame to make a bike that's a tribute to Peter Fonda's motorcycle from the movie Easy Rider.
Do you have any advice on using a chainsaw engine?
What I'm concerned about at the moment is gear reduction; the saw runs at 2500 rpm and I need to get that down, obviously. I have access to a full machine shop and water jet saw, so I figure I can make my own gears. How much do I need to reduce it? Doing the math, 10:1 on a 26 inch tire will give me 20mph, so I obviously want more than that.
Would 4:1 with a speed of 48 mph be feasible?
What's the biggest gear ratio I could get with two gears? I'm thinking I'll need to have two stages of gear reduction, because a 10:1 gear isn't likely.
Anyone know the best way of attaching a gear to the driveshaft of the chainsaw engine?
As for other components, I'd like to make my own rear tire out of a car tire. I'm planning on buying a front wheel and maybe a seat. I've got a pair of Trek cruiser forks but I'm going to try to build my own later, and I've got twin 800 lb/in shocks over the rear wheel.
Any idea what kind of HP should I expect from this engine? It's got a bore of 2.5 inches and a 1.44 inch stroke. I figure I should use a stronger chain than a bike chain, but is a motorcycle roller chain overkill?
I'm a mechanical engineering student and I wanted to get some more hands on experience with engines, as well as build a machine to tear around campus in style.
I bought an old 116cc chainsaw, and I'm going to weld a steel tube frame to make a bike that's a tribute to Peter Fonda's motorcycle from the movie Easy Rider.
Do you have any advice on using a chainsaw engine?
What I'm concerned about at the moment is gear reduction; the saw runs at 2500 rpm and I need to get that down, obviously. I have access to a full machine shop and water jet saw, so I figure I can make my own gears. How much do I need to reduce it? Doing the math, 10:1 on a 26 inch tire will give me 20mph, so I obviously want more than that.
Would 4:1 with a speed of 48 mph be feasible?
What's the biggest gear ratio I could get with two gears? I'm thinking I'll need to have two stages of gear reduction, because a 10:1 gear isn't likely.
Anyone know the best way of attaching a gear to the driveshaft of the chainsaw engine?
As for other components, I'd like to make my own rear tire out of a car tire. I'm planning on buying a front wheel and maybe a seat. I've got a pair of Trek cruiser forks but I'm going to try to build my own later, and I've got twin 800 lb/in shocks over the rear wheel.
Any idea what kind of HP should I expect from this engine? It's got a bore of 2.5 inches and a 1.44 inch stroke. I figure I should use a stronger chain than a bike chain, but is a motorcycle roller chain overkill?