How much of the driver's weight is supported by the knee trays and how much by the seat? After spending a lot of time searching the net, I've not come across many pics of these rigs w/o bodywork or w/o rider to get a clear view of what's going on here. I have gone over the 2013 SRA rules and see no specific guidelines either.
I've been involved w/ dragbike racing since the late '70s and have built and piloted my own machines w/ reasonable success and had a lot of fun.
If someone here would like to take the time to either pm me here, drop me an email or hope beyond hope, engage in a brief phone conversation, it would be sincerely appreciated. I've more questions, of course, but not so many that would take up a huge block of time by telephone. Real old fashioned, I know, what can I say.
Vehicle specifics are as follow: 2F/1R config. RWD, engine behind driver in frt of rear wheel, handlebar steering, hand and foot brake controls. The low and compact driver position used in sidecar racing is exactly what I need for this machine.
Sorry 'bout the long post, just wanted to give as much info as possible.
Thanks in advance for your consideration.
Beech Island SC
If you can get a hold of Tony Foale, he may be able to help. Tony is a long time racing motorcycle designer and has designed some sidecars. He's a very friendly guy. He hangs out on the MC-CHASSIS-DESIGN Mailing List (http://micapeak.com/mailman/listinfo/mc-chassis-design). The list has some very talented engineers on it and they are always very helpful.
Gunna do the "assume the position and take measurements" routine fairly soon and not wanting to re-invent the wheel. Thanks. I am PMing my contact info.
I'll hit up that site kyler, thanks again.
Thanks for taking the time to reply and educate me, it's really appreciated. And yes, I'll be sure to post some construction and action, even non-action pics when we have them.
Depends on your tolerance for pain and/or how much padding there is already in side your leathers.voodooracer wrote:Are they padded?
voodooracer wrote:Or textured sort of to grip the leather? Do they lie parallel to the ground or angle up from knee toward ankle for toe to ground clearance?
Most are probably parallel or angled slightly down at the front (often with some extra padding on the rear lip for those of us with long feet). Often lined with closed cell foam which is fairly grippy. However no strict rules around any of this.
Both outfits the seat and knee trays are one part and slip onto pins for location and support.
I might think you need to help steer with foot pegs on a drag bike, but maybe not on a sidecar. If you use foot pags you might not need or want fronts on the knee trays.
Like Chris said, send pics.
Since there is no engine w/airbox under me should I create a chest rest? Never realized this was part of the equation. Am publishing my e-mail address and ph# here for anyone's benefit that would like to help. Thanks again so very much. I would also love to see an outfit in person and am willing to travel a reasonable amount if any of you are not too distant from the Augusta GA area. The chance to be close up and personal with one of these fascinating machines I have only seen pictures of would be a delight.
Beech Island SC
This sounds like a cool project, I've been watching this thread and thought I'd also throw in my two cents. Chris and Pete have given good direction with the kneeler, I've found that on my F2 most of my weight is on my lower legs with the seat primarily behind me to brace against under acceleration and the front of the kneeler locking me in under braking. We don't have pegs although I have found that the upper pivot for the brake pedal ( right side) does line up with my heel and works as a foot peg when needed. Something I wanted to mention is that on a rig like ours, wheelies don't work out as good as on a bike. While I've been away from the road courses for a few years, I have been to the drag strip numerous times with the sidecar and have found launching to be the big challenge. With my daughter Shelby on the back I had to learn to slide the clutch out carefully or risk lighting the rear tire through 3rd gear if I got too aggressive. One outting I recruited my nephew to put his 210lbs of ballast over the rear tire thinking the extra traction would offset the 100lbs penalty over Shelby. It turns out that physics taught me about vehicle dynamics really quickly as the rig picked up the front tire and then headed left, right toward the christmas tree. It seems that the rig really wants to be steered and once the front tire was relieved of duty, the chair wheel took over. If I understand the configuration you're planning, 1rear 2 front wheels, ala CanAm Spyder but down low, you probably want lots of front suspension travel - drag car style with 90/10 shocks to let the weight transfer without lifting the fronts off the asphalt so you can still steer it. I'm also curious if you plan on a bike sllick out back or a car style drag slick. If you plan on a full drag slick, don't under estimate the strength of your rear axle. With my little 8" roadrace Hoosier I managed to crimp and bend a stock-style tubular axle as the sprocket really shock-loads the axle on the left side when there is lots of traction and the clutch drops. If you're going out for fun with exhibition runs, a smoke show will probably be easier & safer to run that a wheel stander, and everyone loves a half track burnout! Good luck and let us know how it's progressing.