vibration big bore

[RobertWichert]

Thanks Mike! So would a lighter piston make the bike smoother, without changing the counterweight system at all? Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 4/11/2012 10:22 PM, beachmike1 wrote: > > Concerning the post on flywheel weight and vibration. With no counter > balancer a single is a seriously bad vibrator . This is due for the > simple view. > > First that if a rough approach to balance the piston at 100 % ( where > the counter weight is 100 % of the weight of the piston) the unbalance > of the up and down piston movement can be mostly accommodated and > cancelled out for about 25 degrees of each side of top dead. Enter and > bottom dead center. This is not perfect. The acceleration of the > piston is governed by the occulting influence of the rod throw ratio > and gereanl non perfect sinusoidal action against the pistons liberal > motions. The forces produced by the counterweight are perfectly > sinusoid auto in nature. > > The result is as follows. The piston motion is somewhat balanced by > the counter weight as stated. The crank however from about plus and > minus ten degrees on each side of THC to the same at BDC starts to > produce an uncompensated force creating vibration. This force is max > at plus ans minus ninety degrees from TDC. > > The dual counter balance system reduces this a lot but not perfectly. > First is reduces the overall vibration in the same way the counter > weight does. However by splitting the piston counterbalance mass into > two and turning them in opposite directions a good portion of the > vertical component of the piston forces are removed but instead of > inducing a single force with a maximum at plus or minus 90 degrees > from TDC these forces are split into two smaller forces acting in > equal and opposite directions canceling each other out. > > However again the action is not and cannot be perfect due to the > circular nature of the crank motion and the none perfect clocking of > piston forces with an additional issue with the piston forces not the > same at the top and bottom of the stroke. > > This is a common final project for third year mechanical engineering > student. Back many moons ago I wrote a program foe an HP 41 CV to run > this problem. It took fifty five lines of code for the simple counter > weight problem and another 35 lines to add the effect for the counter > balancer. It was in HP basic. In 1980. > > In about 1998 we hired an intern who when to the same school took the > same course and has the same teacher and was given the exact same > final exam. I was not happy. I did not help him on the work except > point out programming mistakes and help with prob > Em definition. I did go to the college to see why a prof would be so > lazy to do this and not correct the darn mistakes in the test to start > with. I was humbled when I found out this was such a pure test of > dynamics understanding that it was used to compare classes over the > years. And compare schools. > > A more interesting problem is to layout the second third and fourth > order evirbarations that gets ugly and requires a lot of programming. > > [Non-text portions of this message have been removed]

[mark ward]

I was tempted to change everything over to minis, But desided I like having everything a simple to Repair Or replace as posible on a trip. You can get regular size blade fuses Just about ANYWHERE, even an old car sitting around. Even someone passing by usualy has a spare, or can get by without the Radio fuse etc. Small peice of tin foil or gum wraper in a real pinch. As with all my electronics, Camera (getting harder to find) GPS (hand held) Flash light, "tent lanern, Etc Etc. I try hard to use AA's in everything, so they interchange, when needed. I once used my GPS's lite to dig out the camera, to take the AA's out and use them in the flash light, that was dead. (still needed the GPS for anouther 1.5hrs) To replace to head light fuse at night, & no moon. [Non-text portions of this message have been removed]

[RobertWichert]

My son encountered some VERY LATE hikers on Mt. Tallac near Lake Tahoe, CA using their phone to follow the trail. Could have been worse, I guess. Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 4/12/2012 10:04 AM, mark ward wrote: > > I was tempted to change everything over to minis, But desided I like > having everything a simple to Repair Or replace as posible on a trip. > > You can get regular size blade fuses Just about ANYWHERE, even an old > car sitting around. > Even someone passing by usualy has a spare, or can get by without the > Radio fuse etc. > > Small peice of tin foil or gum wraper in a real pinch. > > As with all my electronics, Camera (getting harder to find) GPS (hand > held) Flash light, "tent lanern, Etc Etc. I try hard to use AA's in > everything, so they interchange, when needed. > > I once used my GPS's lite to dig out the camera, to take the AA's > out and use them in the flash light, that was dead. (still needed the > GPS for anouther 1.5hrs) > > To replace to head light fuse at night, & no moon. > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed]

[David Nichols]

Why carry spare fuses? Just get an ATO circuit breaker instead and never have to carry those bulky fuses again! http://www.delcity.net/store/Low-Profile-ATC:ATO-Manual-Reset-Circuit-Breakers/p_795453.a_1 ________________________________ From: RobertWichert To: mark ward Cc: List KLR DSN_KLR650@yahoogroups.com> Sent: Thursday, April 12, 2012 1:08 PM Subject: Re: [DSN_KLR650] Mini-fuse's My son encountered some VERY LATE hikers on Mt. Tallac near Lake Tahoe, CA using their phone to follow the trail. Could have been worse, I guess. Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 4/12/2012 10:04 AM, mark ward wrote: > > I was tempted to change everything over to minis, But desided I like > having everything a simple to Repair Or replace as posible on a trip. > > You can get regular size blade fuses Just about ANYWHERE, even an old > car sitting around. > Even someone passing by usualy has a spare, or can get by without the > Radio fuse etc. > > Small peice of tin foil or gum wraper in a real pinch. > > As with all my electronics, Camera (getting harder to find) GPS (hand > held) Flash light, "tent lanern, Etc Etc. I try hard to use AA's in > everything, so they interchange, when needed. > > I once used my GPS's lite to dig out the camera, to take the AA's > out and use them in the flash light, that was dead. (still needed the > GPS for anouther 1.5hrs) > > To replace to head light fuse at night, & no moon. > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]