And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
I don't think Benelli ever used a desmodromic valve setup. Ducati is the most famous user of desmodromic valves and the Mercedes racers of the mid-50s used them as well.
The Ferrari Enzo V12 uses gears to drive the cams as have Honda racing engines for both motorcycles and F1 cars. Straight cut gears are much noisier than a chain but more reliable at high speeds. A chain or belt is pulled off the sprockets by centrifugal force (which increases as a square of velocity) so there must be a robust tensioner system. Al_in_Ottawa
Really? That's better than a timing chain? Do all those gears act like a bunch of mini fly wheels? Did they die early, violently? Hell. they may have been great motors, just complicated, noisy and maintenance heavy, or not. It's fascinating.
Well, one thing is for certain, you don't have to worry about the timing belt breaking!
ReplyDeleteProbably noisy as hell and a lot of parasitic power losses, though. But once the timing is set, it is fricking set!
Well lubricated gears with minimal backlash can have less parasitic power loss than a drive chain.
DeleteDesmodromic valves prevent valve float, and thus maintain power output, at high rpm's.
I don't think Benelli ever used a desmodromic valve setup. Ducati is the most famous user of desmodromic valves and the Mercedes racers of the mid-50s used them as well.
DeleteThe Ferrari Enzo V12 uses gears to drive the cams as have Honda racing engines for both motorcycles and F1 cars. Straight cut gears are much noisier than a chain but more reliable at high speeds. A chain or belt is pulled off the sprockets by centrifugal force (which increases as a square of velocity) so there must be a robust tensioner system.
Al_in_Ottawa
Really? That's better than a timing chain? Do all those gears act like a bunch of mini fly wheels? Did they die early, violently?
ReplyDeleteHell. they may have been great motors, just complicated, noisy and maintenance heavy, or not.
It's fascinating.
Well, it IS an Italian Bike :-)
ReplyDeleteand even Tony must labor to fix it again!
DeleteGear shifter on the right, . . .the way it should be, . . .
ReplyDeleteFeeds the gear head in you.
ReplyDeleteWould be cool if the cover was clear so you could watch.
ReplyDeleteAll you need is a centrifugal clutch like on an old school mini bike.
ReplyDelete