gearing calculator

[Norm Keller]

#ygrps-yiv-203500667 blockquote.ygrps-yiv-203500667cite {margin-left:5px;margin-right:0px;padding-left:10px;padding-right:0px;border-left:1px solid #cccccc;} #ygrps-yiv-203500667 blockquote.ygrps-yiv-203500667cite2 {margin-left:5px;margin-right:0px;padding-left:10px;padding-right:0px;border-left:1px solid #cccccc;margin-top:3px;padding-top:0px;} #ygrps-yiv-203500667 .ygrps-yiv-203500667plain pre, #ygrps-yiv-203500667 .ygrps-yiv-203500667plain tt {font-family:monospace;font-size:100%;font-weight:normal;font-style:normal;} #ygrps-yiv-203500667 a img {border:0px;}#ygrps-yiv-203500667 {font-family:Tahoma;font-size:12pt;} #ygrps-yiv-203500667 .ygrps-yiv-203500667plain pre, #ygrps-yiv-203500667 .ygrps-yiv-203500667plain tt {font-family:Tahoma;font-size:12pt;} "It was an 'object' strapped to the front of a vehicle, sometimes several ft forward, covered with short pieces of yarn to see where the wind was going around the object.  Sometimes there was photography involved, sometimes there was a second rider up close to see the yarn move about."   Gosh, officer, there's been a mistake! We weren't racing. I was just studying the movement of his yarn.   ------ Original Message ------ From: "Martin Earl" To: "DSN KLR650" DSN_KLR650@yahoogroups.com>; "Norm Keller" Sent: 2014-12-30 4:02:23 PM Subject: Re: [DSN_KLR650] Motorcycle horsepower versus speed  

Norm, The air-dam technology captilized on the parasitic drag created by down pressure, and the hardware hangining out in the open. As I recall, a lot of early hot rods tinned the entire undercarriage, some vented, some not, trying to achieve a streamlined body. You know some of the earliest wind tunnel test were not done on a wind tunnel but done in the wind, nevertheless. Sometimes- It was an 'object' strapped to the front of a vehicle, sometimes several ft forward, covered with short pieces of yarn to see where the wind was going around the object.  Sometimes there was photography involved, sometimes there was a second rider up close to see the yarn move about. I recall seeing a trailer that was pushed, then a scaffolding on the trailer THEN an aircraft model attached to the scaffolding.  I think the whole get-up was powered by a Model A or some such thing. More than one way to achieve clean air. There is a lot of aviation technology that is not being used on bikes. Vortex generators could make a bike faster, and uglier. Props are now being given a dimpled tape (think replicating golf ball dimples) along the leading edge that allow the prop to spin up to a higher rpm on the same HP, resulting in slightly faster airplane for all power setting. I think the dimpled tape placed in strategic locations could reduce some amount of the airflow drag. The number one thing to make your bike go faster? Remove the extra 20# located at your belt line. That is what I heard. and so it goes. m1. On Tue, Dec 30, 2014 at 11:18 AM, 'Norm Keller' normkel32@... [DSN_KLR650] DSN_KLR650@yahoogroups.com> wrote: Honda ST1100 100 hp, I heard of a guy who registered 228 kph (137 mph) GPS and still accelerating at the end of a short stretch. These are heavy girls which brings to the point: "I also wonder how much effect has weight on maximum speed?".   Martin Earl's anecdotes regarding streamlining a KLR was also interesting. A front air dam on one of my rally cars raised actual speed from 118 mph to 124 mph which was equivalent to a bunch of power.   Jeff's right about topping stuff out- not at my age. It simply no longer appeals to run a set of knobbies up to even modest speeds.   Had a Dunstall Commando start a lock to lock tank slapper at about 135 mph and took me between cars in an approaching line of traffic. That was "interesting". Only outcome was to break the fairing mounts loose which took 1/2 and some fibreglass to fix. Didn't even soil my shorts- those were the days.   I wonder how much of the "Busa's speed is streamlining. Darn it, Martin, you are making me think that it might be fun to dig out a fairing and....nooooo!!! Not doing that!!!  Unless....    ------ Original Message ------ From: "Jeff Saline" To: normkel32@... Cc: DSN_KLR650@yahoogroups.com Sent: 2014-12-30 10:03:34 AM Subject: Re: [DSN_KLR650] Motorcycle horsepower versus speed   http://AABLLF4K2AZM3Y9J@..." type="cite"> On Tue, 30 Dec 2014 06:56:40 +0000 "'Norm Keller' normkel32@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> writes:   A link was posted to FB showing a KLR maximum speed of 115 mph which is clearly very "optimistic": http://www.topspeed.com/motorcycles/motorcycle-reviews/kawasaki/2010-kawasaki-klr-650-ar72623.html   That brought up some "guesstimate" rules of thumb I use: Honda 50 - 5 hp- 50 mph Suzuki 80 - 7.3 hp- 62 mph Honda S90 - 8 hp- 65 mph Honda CB125 12.5 hp- 75 mph Honda CB160 16 hp- 85 mph Honda CB175 20 hp- 90 mph Suzuki X6 Hustler 29 hp- 100 mph KLR650 37 hp - 100 mph Norton 750 55 hp - 115 mph Kawasaki Z1 82 hp- 132 mph Honda VF1000 122 hp- 150 mph Kawasaki Ninja ZX11 145 hp - 175 mph Suzuki Hyabusa 173 hp- 194 mph   Anyone care to improve the list? <><><><><><> <><><><><><>   Norm,   I don't know about an improvement but I'll add to it.   1979 BMW R100S European specs 70 hp - 120 mph indicated (converted from kph) when I chickened out and slowed.  I think it would have done close to 140 mph indicated.  I was in Germany on the autobahn.  I suppose that was probably closer to 108 mph actual and maybe it would have gone to 122-125 mph actual.   I had a 1982 BMW R100S that would have been rated 70 hp and fastest I took it was 105 mph indicated which was probably 97 mph actual.  That was on a deserted road in Oklahoma about 15 years ago.  It would have gone faster but I wouldn't.   Best, Jeff Saline The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . .     . . .     ____________________________________________________________ [b]Apple's Crazy New Gizmo[/b] Forget the iPhone 6. Next hit Apple product leaked. (see picture) fool.com