Motorcycle Safety

[jkv357]

Originally Posted by larrybuck

I feel I'm entering a war zone here.

Just had an possible simple solution for side wind issues.

I am serious. This is not a joke. If we are talking about a 1, or 2 wheeled vehicle,
why couldn't we deploy on demand a training wheel opposite side the wind is pushing
from.

We would still be legal (under 4 wheels), and if designed properly, the weight penalty
should not be too high!

Would that not be a huge piece of mind for the operator?

I think it would cause other issues and upset the balance of the cycle. When you are working against a cross-wind you are leaning into the wind. Not sure what adding a wheel on the opposite side would do to your stability as it touched down, but I don't think it would be good.

Maybe someone with more engineering knowledge could explain what would happen.


Jay

[dcb]

I was thinking of a control surface, like active suspension, only it is a flap that counteracts crosswinds (like a rudder or something), or something much more complicated integrated into the aerodynamics?

so you are cruising at 60mph, 30mph sidewind hits from the right and the control surface reacts by moving its trailing edge left. not sure about trying to lever the bike level from the tail end though, it might try to swap ends if there isn't some downforce added along with the counteracting force, or if there isn't another control surface at the front, don't really know, but the idea is to add some active "flying" ability to the bike so it can react appropriately.



Assuming of course that crosswind is enough of a concern to merit such measures (not trying to be a solution looking for a problem here). I've never been in an enclosed two wheeler.

[sendler]

Cross wind sensitivity in a purpose built enclosed two wheeler doesn't have to be any worse than a normal naked bike. The bad rap about cross wind performance is coming from DIY aero retro fits that impose a really tall rear fairing behind a stock bike sit up position. Off the shelf 120mpg at 65mph with road manners that are identical to a normal motorcycle would be easy if Honda thought anyone would buy it and could sell brand new for $10,000. $7,000 when production went to 200,000 per year and built next to my bike in Thailand.

[Grant-53]

Right. The whole package needs to be considered with respect to the center of mass. The price of an OEM fairing would vary depending on whether it is a touring style, front/rear separate, or a fully enclosed.

[Grant-53]

Dear dcb, You are onto a potentially useful idea and I have been giving some thought in the same direction. Aircraft use a rudder to adjust to turning and cross winds. A rudder tip turns toward the direction of the wind or current to compensate.

[Grant-53]

On the racetrack kicking free of the bike and sliding to a stop works as long as your leathers hold up and someone else doesn't ride you over. The barriers usually are far enough away you don't have to worry much about hitting anything more substantial than a stack of hay bales. Sure, nobody wants to go through a tumble cycle with 300 lbs of unfriendly metal. The idea is to turn the bike into a protective device without it becoming just a mini cage. There are cars, trees, guardrails, etc that I don't want anyone to hit without as much protection as feasable.

Leg protection - small touring bar structures fore and aft of feet
Head, arms, and chest - front fairing outside hard skin over crushable core, inertial reel lapbelt.
Hip, shoulder, back - side panels and seat back of honeycomb aluminum or foam core laminate; head rest, crushable tailbox.

All this need not interfere with putting a knee down or make a 250cc feel like a truck.
Shoulder

[Grant-53]

I have been following closely the construction of the fairings Alan Smith and Craig Vetter have been building. The aluminum framing looks like it would absorb a good bit of energy in a crash front or rear. I don't think either have mentioned putting the faired bikes on their side while riding. Right now Craig needs a good headlight system for the Helix. A PAR-36 size lamp is the smallest legal headlamp available. The strips of LEDs as marker lights and turn signals looks to make the bike highly visiable. Safe doesn't have to be ugly or boring, just smart.