5
5-7HEAVEN
Guest
I'm thinking of installing a rack-mount-type engine in a frame-mount position. HOWEVER, the engine's drive sprocket will be on the right side, in line with the bike's 3/7/21-speed gears. The bike's derailleur will do its normal job of selecting gears and maintaining proper chain tension.
Gears will be shifted when engine is idling, to maintain "mechanical integrity" and not severely abuse the multispeed cassette.
I DO realize that the engine spins counterclockwise, thus making it impossible to drive the gears in this position. THEREFORE, I'm looking for a reverse-rotation gearbox with gear reduction that the engine can bolt on to.
I know that STATON has a chain drive gearbox WITH a reverse-direction sprocket on its outer face. It also has 5:1 gear reduction, which would handily provide proper gear reduction for the engine's optimum range. With a 9t gearbox sprocket and 34t rear sprocket(the biggest one in the cassette), this 3.78:1 gear ratio multiplied by STATON 5:1 gear reduction equals 18.89:1 final drive. This is equivalent to happy time engine and 46t rear sprocket, and is an excellent starting point.
To set up this engine drive, the chainwheel must be moved to the left side, and in line with a STATON 16t left-side freewheel sprocket. The 36t chainwheel and driven sprocket must be matched to use the same chain. It will also be geared to provide 1:2 ratio, which is typical for a single speed cruiser.
Soo, does anyone know of any reverse-direction gearbox, besides the STATON gear chain drive?
Also, let's hear your opinion if this idea will fly. Any helpful suggestions will be appreciated.
I've played "devil's advocate" here, and discouraged/shot down a few members' ideas. Here's your chance to shoot holes in my sails.
Myron
Gears will be shifted when engine is idling, to maintain "mechanical integrity" and not severely abuse the multispeed cassette.
I DO realize that the engine spins counterclockwise, thus making it impossible to drive the gears in this position. THEREFORE, I'm looking for a reverse-rotation gearbox with gear reduction that the engine can bolt on to.
I know that STATON has a chain drive gearbox WITH a reverse-direction sprocket on its outer face. It also has 5:1 gear reduction, which would handily provide proper gear reduction for the engine's optimum range. With a 9t gearbox sprocket and 34t rear sprocket(the biggest one in the cassette), this 3.78:1 gear ratio multiplied by STATON 5:1 gear reduction equals 18.89:1 final drive. This is equivalent to happy time engine and 46t rear sprocket, and is an excellent starting point.
To set up this engine drive, the chainwheel must be moved to the left side, and in line with a STATON 16t left-side freewheel sprocket. The 36t chainwheel and driven sprocket must be matched to use the same chain. It will also be geared to provide 1:2 ratio, which is typical for a single speed cruiser.
Soo, does anyone know of any reverse-direction gearbox, besides the STATON gear chain drive?
Also, let's hear your opinion if this idea will fly. Any helpful suggestions will be appreciated.
I've played "devil's advocate" here, and discouraged/shot down a few members' ideas. Here's your chance to shoot holes in my sails.
Myron
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