| Author | Message | ||
     Snail |
Thanks Danny, so theres a whopping diff. of .2 sq.ft. and .06. Blake, whats the math to compute the necessary HP to overcome this deficit? Paul | ||
| Snail |
whoops, sorry Blake, thats too open ended. Let me rephrase that, whats the necessary HP required to overcome the deficit to reach a speed of 200 MPH. I understand that the resistence is expotential with speed, so the 200 mph should give you a known value. Paul | ||
| Aaron |
Drag is a square function, but horsepower required is a cube function. Which is non-intuitive at first, took me a little bit to figure out why. The reason is that faster requires more power even when force required remains the same, after all, power = torque x rpm. More rpm (faster) is more power even when force (torque) doesn't change. | ||
| Firemanjim |
Paul,your Gixxer got an awful nice write-up in the new Motorcyclist Mag.Too bad I don't have an extra 10000,but after new truck to carry bikes and kids new Derbi,I don't seem to have it.(of course if the OT this summer is as bad as I think,I may have more than enough--of course I won't have anytime to spend it--gotta love summer in CA.) | ||
| Sidv |
I don't know what is the correct forum for my question, so please direct me appropriately. I had a sticker on my bike that was starting to crack, fade, etc., basically a 2 1/2" smiley face similar to this  with fangs and cross bones behind it. While at the ROT rally this weekend I had a guy qoute me a price on it. I saw some of his work in progress and a few samples. Deal was made and the flyscreen and sticker provided, with a stated two hour turn around. It ended up not being ready until the next day, and the results were very displeasing. The image bore a resemblance to the sticker, but with glaring differences, mainly the smile was all zizaged(sp) and crooked. Instead of looking menacing, it looked like the smiley had taken a bat to the teeth. The guy said he couldn't redo it without sanding through the stock paint and that he didn't have a color to match Reactor Yellow. Also, there was only two hours left to clear the rally grounds. So now I am stuck with an image on my bike that I don't like. It wouldn't be so bad except I was specific about certain things that he didn't pay attention to. SO, anyone have any ideas on how I can fix it without totally stripping it down or trusting someone else and getting taken again? If the smile could be redone, I think it would be okay. As always , your tips and suggestions are greatly appreciated. Sid | ||
| Mikej |
Snail, I'm thinking there's also the traction factor involved with the salt runs. I know you know all about traction factors in non-asphalt environs.  Sidv, Go here. There's an art to art, and it isn't always easy to "copy" a piece and get the same effect. Are you talking about an air-brush job that the guy did? Clarify in the re-post of your question into the proper sub-section. Also, do you know what kind of paint he used? Also, what kind of bike was this on? Painted plastic or molded-in coloring. Post the parameters in the linked section as best as you can recall or know. | ||
| Blake |
Paul, Ratio the CDA values... 2.9/2.7=1.074 meaning the Busa would require an additional 7.4% more power at the rear wheel compared to the RR Buells in order to achieve the same peak speed. And that is probably a bit conservative since wheel-spin would probably alse be more severe. Assuming it takes around 200RWHP to do 200MPH on an RR Buell, the Busa would need about 215RWHP. | ||
| Blake |
PS: Just one day? ![:]](http://www.badweatherbikers.com/buell/clipart/proud.gif) | ||
| Blake |
PSS: Yes the GSXR Front calipers and coated tubes are trick looking for sure. It'll be interesting to see if other brands pick up the black fork tube coating. | ||
| Snail |
Thanks Blake, Aaron, Danny, that was what I was trying to come to, some reasonable defitition of power requirements to push the Busa to 200 mph. Gives me a base to start making appraisels on cost and approach. I keep thinking the 178 mph record for the Gix would be a better choice. The Gix seems to have some real legs, its over 100 lbs. lighter, makes nearly the same HP, (152 bone stock) Its smaller. One day is minimum. All we have to do is get Jean and Michele out in the kitchen, then we go ride bikes all day, come home, eat some good food, repeat. So when you comming out? | ||
| Josh_ |
>215RWHP ...at 4000ft in 95+degrees? Or SAE corrected? | ||
| Aaron |
Josh, he was just given a hypothetical reference point, he wasn't representing it as being the correct number. And it's not. Paul, you'll need to defeat your speed limiter if you want to go 178. Even if your speed limiter is 187. Wheelspin. The exact amount depends on the condition of the salt, but it's definitely a big factor at these speeds. | ||
| S320002 |
Blake, The coating on Paul's fork tubes is called DLC which stands for Diamond-Like Carbon. It's been around for awhile but I don't know if it's used on any other street bikes. Greg | ||
| Blake |
Paul, LSR isn't a drag race so weight is not a concern. In fact, in order to maintain traction, more weight can be a very good thing. You might want to hide some lead on your GSXR. Josh, What Aaron said... the 200 HP was just used as to illustrate the difference in power required between a Busa and an RR faired bike. So SAE or actual isn't really relevant. But I was thinking SAE when I wrote it. Greg, Like I said... It will be interesting to see if other brands pick up the black fork tube coating. | ||
| Snail |
Using a GPS to check the accuracy of the Gix speedo revealed a 10% positive error. Redline in 4th gear indicated 178, 160 actual mph. Two gears left. I think the bike is capaable of pulling redline in 6th gear. Disabeling the limiter should be easy. Guess I better order a rule book. Paul | ||
| Firemanjim |
Paul,and so the slide into complete salt insanity starts----so if I just do this to that bike I can-------oops,too late,you're hooked. | ||
| Blake |
Paul, I'll talk to Michele about vacation. We haven't nailed down any plans yet. Would likely be late Summer or early Fall. Or maybe it'll be just me on my own. Would be cool to ride up to see that old wierd guy in Washington. | ||
| Snail |
Blake, I'll be gone the last two weeks in July, touring Vancouver Isl. and the Sunshine Coast of B.C., but should be around most of the rest of the summer. Looks like I might be in Utah sometime in Sept., irritating Aaron. Let me know when you make some plans. Bring Michele, she and Jean can cook...we can ride. Paul | ||
| Jim_witt |
Greg wrote: The coating on Paul's fork tubes is called DLC which stands for Diamond-Like Carbon. Greg, I know they use it in the semiconductor area but didn't have a clue it was used on anything else. Do YOU know of anyone doing the coating process (I realize I can search the Interent)? I'll have to check around here locally ... interesting. Leave it to the metric bike designers to do all the trick things on production bikes. Thanks for the info, -JW:> | ||
| Blake |
Paul, If Michele sees your post she's gonna be gunning for you. Lucky for you she won't be likely to see it. Leave her in the kitchen he says, we'll go riding he says... I've not yet developed a very high tolerance for arsenic.  Greg, Not sure the DLC is anything more than a marketing ploy. Don't believe I've seen it on any SB or GP racing machines yet. Still see the nitride gold colored coating. It looks better anyway.  | ||
| Hans |
Choptop: The Honda C310 engine was originally a Belgian made engine with Honda parts, for a moped purely for the Dutch roads. http://home.wanadoo.nl/mamahonda/techniek/modelinfo/c310c320.html Seems to be an 50 cc engine. The Dutch Firm Leertouwer was specialized on old Honda mopeds, but has now also other brands. www.leertouwer.com Dutch site only. I made a call and they told me to have all parts for an Honda C310 engine, not an complete build-up engine. They warned me that American versions would have different parts and that you had to be sure to get the right ones, but they persisted having all parts. They will understand emails in English. I am willing to jump in when there are problems.  Hans | ||
| Snail |
Blake, I remember when you were here you didn't want to leave Michele and go riding becuase you thought she'd be mad. When we did, and returned, she was having so much fun copying Jeans receipes that she hadn't even noticed you were gone. Men at work, heres what 7K lbs. of dungeness looks like. Pic taken early last season.  | ||
| Choptop |
Hans, Danke Mucho. I just need to find a running engine and I'm off. | ||
| Firemanjim |
Choptop,I see you are looking at oddball records in rulebook ,again.It's amazing the classes with no records,esp. in the smaller cc sizes.Happy hunting.Wasn't the early trail bike a pushrod motor? | ||
| Jim_witt |
Chop, In case you missed my post, below is Luc Foekemas 50cc drag bike in Holland. He's ripping off 15.79 in this little gizmo on pump gas.  -JW:> | ||
| Choptop |
Nope, I've seen it. If its small cc and funky, I'm all over it.  | ||
| Aaron |
Saturday, Brian had to go over to High Country for a second. He hops on his kid's Honda 50 (which is really hopped up and is closer to an 80) and buzzes over there, wearing shorts and a t-shirt. That place is pretty busy on a Saturdays. All kinds of fancy billet barges parked there and people dressed up like bikers. I've gone over there on my hot-rod Blast and gotten stares. You can just imagine a guy showing up on a Honda 50 ... Brian said he parked next to a shiny V-rod, and as he was getting this look of disbelief, he just told the guy "you don't want none!" and went inside. | ||
| S320002 |
JW, My first experience with DLC was in the semiconductor industry. I don't know of anyone offhand who does it on a larger scale custom basis. Blake, DLC works just like TiNitrde or any of the other nitride coatings used to reduce fork stiction. I don't know if it works significantly better but I like the color. I would be very interested to see how it would perform on aluminum cylinder walls. Greg | ||
| Choptop |
FMJ, what early trail bike? | ||
| Blake |
Aaron, You mean this bike?...  |
